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2013 FULL-LINE CATALOG
blower silencersabsorptive silencersvent/fan silencersseparator silencers
engine silencersindustrial filters & filter/silencers
accessories
FULL-LINEINDUSTRIAL CATALOG
Ordering Information 1.1
Blower Silencers 2.1
Absorptive Silencers 3.1
Vent Silencers 4.1
Industrial Fan Silencers 5.1
Vacuum Pump LiquidSeparator-Silencers 6.1
Engine Exhaust Silencers 7.1
Filters and Filter-Silencers 8.1
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Table of Contents2013 Full-Line Catalog
NoteAll dimensions in inches and weights in pounds, unless otherwise indicated.
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NortheastBlakeslee Equipment27352 Center Ridge RoadWestlake, OH 44145Web: www.blakeslee-equipment.comE-mail: [email protected]: 440-808-6666Fax: 440-808-1750
J & B Industrial Sales Co., Inc.20 Eastgate Industrial DriveGrove City, PA 16127Web: www.jbindustrial.comE-mail: [email protected]: 724-458-0700Fax: 724-458-6888
SoutheastDegroff Process Equipment Co., Inc.P.O. Box 280759Memphis, TN 38168Web: www.degroffprocess.comE-mail: [email protected] Telephone: 901-377-0251Fax: 901-377-0368
Mahan’s Thermal Products, Inc.30 Juniper CourtCovington, GA 30016Web: www.mahans.comE-mail: [email protected]: 770-786-5555Fax: 770-786-3020
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OrderingInformation
Northeast Controls, Inc.P.O. Box 275Upper Saddle River, NJ 07458Web: www.nciweb.netE-mail: [email protected]: 201-327-7660Fax: 201-327-3242
Northeast Controls, Inc.P.O. Box 385Round Top, NY 12473Web: www.nciweb.netE-mail: [email protected]: 518-622-0310Fax: 518-622-0311
Ready to order? For service in Maine,New Hampshire, Massachusetts,Rhode Island, Connecticut, New York,New Jersey, Pennsylvania, Delaware,Maryland, Vermont, Virginia, West Virginia,Kentucky, and Ohio contact an authorizedUniversal AET representative.
Ready to order? For service in Tennessee,North Carolina, South Carolina, Alabama,Georgia, and Florida contact an authorizedUniversal AET representative.
Polytech Services, Inc.P.O. Box 36841Charlotte, NC 28236E-mail: [email protected]: 704-372-4161Fax: 704-372-4207
Hudson Pump3524 Craftsman Blvd.Lakeland, FL 33803E-mail: [email protected]: 800-780-7867Fax: 863-666-5649
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OrderingInformation
MidwestAPSCO, Inc.774 Burr Oak DriveWestmont, IL 60559Web: www.airprocesssystems.comE-mail: [email protected]: 800-822-0771Fax: 630-887-0771
C. Emery Nelson7631 Commerce StreetPO Box 238Hamel, MN 55340Email: [email protected]: 763-420-3844Fax: 763-420-2542
Petro Chem Equipment 4338 Jeffrey DriveBaton Rouge, LA 70816E-mail: [email protected]: 225-292-8400Fax: 225-292-1033
Dynamic Bulk Systems1111B Horan DriveFenton, MO 63026E-mail: [email protected]: www.dynamicbulk.com Telephone: 800-314-3267Fax: 636-343-4442
Hartsaw Equipment Co.427 S. Parker StreetOlathe, KS 66061Web: www.hartsaw.comE-mail: [email protected]: 800-825-4281Fax: 913-782-2828
SouthL.C. Eldridge Sales Company, Inc.9800 Richmond Avenue, Suite 325Houston, TX 77042Web: www.eldridgesales.comE-mail: [email protected]: 713-780-7200Fax: 713-780-9324
L.C. Eldridge Sales Company, Inc.5646 Milton Street, Suite 227Dallas, TX 75206Telephone: 214-369-6401Fax: 214-369-7744E-mail: [email protected]
Seltech, Inc.5321 S. Sheridan, #31Tulsa, OK 74145Web: www.seltechinc.comE-mail: [email protected]: 918-622-6712Fax: 918-664-6059
Ready to order? For service in Minnesota,Wisconsin, Illinois, Indiana, Nebraska,Iowa, Kansas, Missouri, Arkansas,Louisiana, and Mississippi contact an authorized Universal AET representative.
Ready to order? For service in Oklahomaand Texas contact an authorized UniversalAET representative.
MountainFluid Technology, Inc.1315 Nelson Street, Unit HLakewood, CO 80215Web: www.fluid-technology.comE-mail: [email protected]: 303-233-7400Fax: 303-233-0093
North Monsen CompanyP.O. Box 174 (84110)Salt Lake City, UT 84101Web: www.northmonsen.comE-mail: [email protected]: 801-322-1343Fax: 801-322-1516
Ready to order? For service in Idaho,Montana, North Dakota, South Dakota,Wyoming, Nevada, Utah, Colorado, Arizona,and New Mexico contact an authorizedUniversal AET representative.
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OrderingInformation
CanadaMcRae Engineering Equipment, Ltd.57 Atomic AvenueToronto, OntarioCanada M8Z 5K8Web: www.mcraeeng.comE-mail: [email protected]: 800-600-9427Fax: 416-255-7860
Ramtech Enterprises, Ltd.50 Glenwood PlaceCochrane, Alberta Canada T4C 1H3E-mail: [email protected]: 403-932-4773Fax: 403-932-3274
Pacific
ADS Equipment, Inc.P.O. Box 840Mercer Island, WA 98040Web: www.adseq.comE-mail: [email protected] Telephone: 206-763-3600Fax: 206-763-3012
McKenna Engineering390 Bel Marin Keys Blvd., Suite HNovato, CA 94949Web: www.mckennaengineering.comE-mail: [email protected]: 415-883-9604Fax: 415-883-9607
McKenna Engineering1162 E. Dominguez StreetCarson, CA 90746-3538Web: www.mckennaengineering.comE-mail: [email protected]: 310-763-7929Fax: 310-763-7950
Asia-PacificUniversal AET71 Bukit Batok Crescent #05-07Prestige CentreSingapore 658071SingaporePhone +65-6665 [email protected]
IndiaUniversal AETSurvey No. 270/1/16Baner, Pune 411045IndiaPhone +91 020 [email protected]
Ready to order? For service in Washington,Oregon, and California contact an authorizedUniversal AET representative.
Ready to order? For service outside the United States, contact our authorized Universal AET global representative.
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EuropeUniversal AETUnit 2, BarleyfieldHinckleyLeicestershireLE10 IYEPhone +44 (0)1455 [email protected]
United StatesUniversal AETCORPORATE HEADQUARTERS1925 Highway 51/138P.O. Box 411Stoughton, WI 53589 USAPhone +1 (608) [email protected]
Rotary Positive BlowersThe Rotary Positive Blower is a two impellercompressor that delivers a large quantity ofgas or air relative to the individual pulses.Blower capacities are expressed in CFM atinlet conditions (ICFM). Blower size is usuallyexpressed as gear diameter by rotor length.Pitch Line Velocity (PLV) is the peripheralvelocity of the timing gear—equal to theproduct of the gear circumference and therotative speed of the blower, usuallyexpressed in feet per minute (FPM).
The blower presents two problems:1) pulsation within the piping system and,2) noise radiation in the vicinity of the blowerand piping.
The importance of these relative to each otheris a function of blower size and speed; bothincrease proportionately to the blower sizeand the square of the speed.
Pulsation is more pronounced on thedischarge side. Peak pulse pressures are quitesevere and can result in unsilenced dischargesound power levels up to 140–145 dB. Theinlet, although producing less severe pulsationand noise, receives equal attention since theinlet is usually open to atmosphere and thenoise much more apparent.
SilencersThere is little question that silencers are anecessity on any blower installation.Regardless of the size or speed of the blower,silencers of some type are nearly always used.
In the selection of blower silencers, there aretwo basic considerations: 1) the silencer mustbe the correct size (i.e., sufficient capacity forthe volume flow) and, 2) the silencer must bethe proper type for the application. Thenominal silencer size need only be based onthe gas volume, (i.e., the CFM of the gas orair at the operating conditions). However, thesilencer (design) must be selected withconsideration of the blower size andoperating speed. Complete application andcapacity information is given on page 2.3.
There are two types of silencers commonlyused on positive blowers: a reactive typesilencer which consists of a series ofexpansion chambers having interconnecting
tubes, a more sophisticated silencer design.is the combination chamber-absorptive type.This combination silencer is similar to thereactive type with the exception that anacoustically-packed, sound absorbingsection is included, comprising an extensionof the silencer connection closest to theblower. The inlet of a discharge silencer andthe outlet of an inlet silencer are the endshaving the packed section.
A third basic type of silencer—the simple,straight-through packed type—is occasionallyused on blowers. This type of silencer is usuallyused on small, high speed machines whichcharacteristically produce significant highfrequency noise and relatively mild pulsations.
The PLV is normally the criterion forsilencer type selection. If the blower isoperating in the critical PLV range, it willgenerate objectionable high frequency noisewhich may cause shell ring or tank hammerin the piping and silencer. These critical PLV conditions will always require acombination chamber-absorptive silencerfor satisfactory results.
Inlet SilencersFor inlet service, a PLV of 3,300 ft/min orgreater is considered critical. This transitionspeed is empirically established and issomewhat arbitrary, however, it is commonlyaccepted that blowers operating at or above3,300 ft/min are considered critical for thepurpose of inlet silencer application. Thoseoperating below 3,300 ft/min are consideredsubcritical. Subcritical PLV applications canusually be silenced adequately with achamber-type silencer, such as Universal URBor UCI Series. Blowers operating above thecritical PLV of 3,300 ft/min will invariablyrequire the RIS Series combination chamber-absorptive type silencer. Inlet Filters or FilterSilencers are commonly used on blowerinlets, either individually or in series with aseparate inlet silencer. Please reference theFilters and Filter Silencers section of thiscatalog for further information.
Discharge SilencersFor the more severe discharge conditions oftypical blower installations, a PLV of2,700 ft/min is accepted as the criticaltransition speed. Blowers operating below2,700 ft/min are considered subcritical andcan usually be adequately silenced on thedischarge side by use of a chamber-typesilencer UCD or URD Series. Machinesoperating above the 2700 ft/min transitionspeed will require combination chamber-absorptive silencers such as SD or RD Series.
In some larger blower installations, pipingrequirements or space restrictions maypreclude the use of a large, single dischargesilencer such as the SD or RD Series.
Where two or more blowers discharge into acommon header, individual silencers upstreamof the header are required to subdue theindividual blower pulsations. Otherwise, thepulsations tend to beat with each other andcan be extremely objectionable.
Note: Silencers should be mounted as closeto the blower as possible since any pipingbetween the blower and silencer will radiatenoise. Standard silencer connections are notdesigned to carry external piping or valveloads, so good piping support practicesshould be used to prevent stresses thatcause fatigue and eventual fracture of thesilencer or piping. It is also good practice toisolate the blower from the silencer with aflexible expansion joint. Contact UniversalAET for special design considerations whereloading is a factor.
Attenuation CurvesNoise attenuation curves are given for thevarious models within this section. The curves represent insertion loss ofairborne noise for typical applications underaverage conditions. It is not feasible to chartthe expected performance of a silencer overa wide range of applications and conditions,therefore, the curves must be used withdiscretion. Structure-borne noise (seeabove) may be a consideration and willrequire separate analysis, since it is notairborne noise and not used for silencerperformance rating.
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GeneralInformationBlower Silencers
In a closed blower discharge system,structure-borne noise—such as that radiatedby pipe wall and silencer shell—may be aconsideration, particularly where a stringent,close-proximity noise specification applies. For these applications, various means areavailable to treat the pipe and shell radiatednoise, such that most reasonablespecifications may be met.
For instance, it is possible to lag the silencer
shell externally and reduce any shell noisecontribution to below the casing and mechanicalnoise of the blower and driving machinery.
Universal AET invites your inquiriesconcerning special applications where EPA,OSHA or other noise specifications apply.Special applications are handled on anindividual basis and recommendations aremade according to specific requirements ofthe installation.
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GeneralInformation
Rotary Positive Blowers
The silencers shown below are more fullydescribed on the individual catalog pages.These units are designed specifically for useon Rotary Positive Blowers.
There are fundamental similarities betweenblower silencers and other types, particularlyreciprocating engine silencers, which alsorequire a silencer design that provideseffective pulse control as well as noise
attenuation. However, blower silencersgenerally must be constructed moreruggedly to withstand prolonged exposure tosevere pulsations produced by the blower.
All silencers described are of standard withend in, end-out design. Low or high sideinlet and outlet connections are availableand are described on the individual catalog pages.
UCI SeriesInlet SilencerChamber-type inlet silencer for use on sub-critical PLV applications. Available in pipesizes 8"–30". Smaller sizes use URB Series.Available with side connections andmounting brackets.
SD SeriesRD SeriesDischarge SilencersCombination chamber-absorptive typedischarge silencers for critical PLVapplications. Available in pipe sizes 2"–30".Low, high, or opposed side connections andmounting brackets available on most sizes.
UCD SeriesURB/URD SeriesDischarge SilencersChamber-type discharge silencer for use onsub-critical PLV applications. Available inpipe sizes 8"–30". (Smaller sizes use URBSeries). Low, high, or opposed sideconnections and mounting brackets available.
RIS SeriesInlet SilencerCombustion chamber-absorptive type inletsilencer for critical PLV applications.Available in pipe sizes 2"–30". Low or highside outlet and mounting brackets availableon most sizes.
Accessories,Special Features
Mounting BracketsInspection OpeningsPressure Vessel Construction
Oversize FlangesSpecial FinishesSpecial Materials
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Transition Speed-RPM
Application,Capacity,Pressure Drop DataBlower Silencers
BlowerGear Size Inlet Discharge
22!⁄"
345678
1012141618202224
6,3005,0404,2003,1502,5202,1001,8001,5751,2601,050
900785700630570525
5,1554,1253,4352,5752,0601,7201,4701,2901,030
860735645570515470430
Blower Transition Speed1
Pitch LineVelocity
BelowTransition
InletSilencer
UCI, URB
DischargeSilencer
URB, UCD,URD
AboveTransition RIS SD, RD
Silencer Model Specifications2
! "!P = V4005
2c
!P ! ! " c " "V4005
P14.7
530T
Silencer RecommendationsAs mentioned on page 2.1 pitch line velocity(PLV) is the speed of the timing gear in feetper minute (ft/min). For purposes of silencerapplication. PLV is considered “critical” at3,300 ft/min for intake and 2,700 ft/min fordischarge.
Table 1 gives transition speeds in RPM.Blowers running at these speeds or greaterwill have critical PLV. Operating speeds belowtransition will be in the sub-critical range.Blowers operating in the sub-critical speedrange usually require only simple chamber-type silencers while those in the critical rangerequire combination chamber-absorptive typesilencers. If there is doubt, it is best to usethe combination-type silencers. When gearsize and operating speeds are known, theproper type silencer is easily selected.
Silencer Size Selection, CapacityTable 3 gives the nominal capacity of thevarious size silencers. “Size” in this tablerefers to the silencer “nominal size,” or its“inlet size.” Capacities are expressed in inletCFM (ICFM), thus, discharge silencers arerated at higher capacities than inlet silencerssince the air is compressed to reducedvolume at the discharge operating pressure.
A From Table 1 determine whether blowerRPM is above or below the transitionspeed for critical PLV.
B Consult Table 2 for recommendedsilencer models.
Pressure DropThe following formulas may be used tocalculate pressure drop through thesilencers covered in this catalog.
Inlet:
(assumes silencer inletis open to atmosphere)
Discharge:
!P = pressure drop through silencer,inches of water
V = air velocity through silencer,ft/min*
c = individual silencer restrictioncoefficient—empirical constant(see Table 4)
P = discharge pressure, PSIA(operating pressure in PSIG + 14.7)
T = discharge temperature, ˚Rabsolute (operating temperature in˚F + 460)
* To calculate velocity through silencer, divide flow inACFM by cross-sectional area of silencer inlet diameterin square feet.
2
Size
11!⁄"
22!⁄"
33!⁄"
4568
1012141618202224262830
Est Temp.
3070
120190270370480750
1,0801,9203,0004,3005,9007,7009,700
12,00014,50017,30020,30023,50027,000
70˚F
3580
140220320430560880
1,2602,2503,5205,0706,8909,000
11,40014,00017,00020,20023,80027,60031,700115˚F
4085
150235335455600935
1,3402,3903,7305,3707,3109,550
12,10014,90018,10021,50025,20029,30033,600140˚F
4090
160245355480630985
1,4102,5103,9305,6607,700
10,00012,70015,70019,00022,60026,60030,80035,400165˚F
4095
165255370505660
1,0301,4802,6304,1105,9208,060
10,50013,30016,40019,90023,70027,80032,20037,000190˚F
45105185285415560735
1,1501,6502,9404,5906,6008,990
11,80014,90018,40022,20026,40031,00036,00041,300240˚F
Silencer Capacity3
Inlet Silencer4 PSIG
Discharge Silencer
Capacity (Inlet CFM 14.7 PSIA at 70˚F)
6 PSIG 8 PSIG 10 PSIG 15 PSIG
URB, URBYUCI, UCIY, UCIHRIS, RISY, RISHUCD, UCDYURD, URDY, URDHSD, SDY, SDHRD, RDY, RDHRDS, SDS, URDS
4.24.24.24.24.24.24.27.0
Model Pressure DropCoefficient (C)
Pressure Drop Coefficients4
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SpecificationsUCI Group
Chamber TypeInlet Silencer
40
50
63 125 250 500 1K 2K 4K 8K
30
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
10
0
20
The UCI Series Inlet Silencer is a heavy-duty, all welded unit constructed of carbonsteel sheet and plate. It provides pulsecontrol and silencing for most subcriticalPLV applications. Sizes 8" and larger areequipped with flanged connections drilled to
125/150 lb ANSI specifications. Exteriorsurfaces receive a shop coat of rust-inhibitive primer and may be finish paintedin the field if desired. The UCI Series is thebasic inlet model and is the conventionalend-in,end-out version. The low side inlet
DrainP
N
N
L H D
K
Y
K
Y
UCI Series UCIY Series(Low Side Outlet)
UCIH Series(High Side Outlet)
model is designated UCIY Series and thehigh side inlet type is designated UCIHSeries. The three types are fundamentallyalike and performance is identical. Mountingbrackets and other options are available—see page 2.11.
PartNumber D L N H K
Min Max
P(Size)
Min Max
UCIY UCIH
Y
Weight
Chamber Type Inlet Silencers
Sizes 1"–6" Use URB Series (page 2.7)
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
53-108-AA53-110-AA53-112-AA53-114-AA53-116-AA53-118-AA53-120-AA
53-124-AA53-126-AA53-128-AA53-130-AA
2226303036424248545460
45!⁄"
6980!⁄"
91!⁄"
103!⁄"
114126138149161173
250360550
9501,2001,3501,9502,5002,7503,4004,650
11!⁄"
22!⁄"
33!⁄"
4568
101214161820
24262830
61748799
113126140153167179193
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
54678092
106119131144158170184197
14!⁄"
16!⁄"
18!⁄"
21!⁄"
24!⁄"
25!⁄"
28!⁄"
31!⁄"
31!⁄"
34!⁄"
37!⁄"
911
13!⁄"
15!⁄"
17!⁄"
1920!⁄"
22!⁄"
23!⁄"
25!⁄"
27!⁄"
2127
404855!⁄"
60!⁄"
66!⁄"
7285
9587
28!⁄"
34!⁄"
47!⁄"
53!⁄"
59!⁄"
67758384
10091
206 4!⁄"66
53-122-AA22
650
57413412!⁄"18!⁄"
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SpecificationsRIS GroupCombination Chamber-Absorptive TypeInlet Silencer
PartNumber D L N H
54-102-AA54-125-AA54-103-AA54-135-AA54-104-AA54-105-AA54-106-AA54-108-AA54-110-AA54-112-AA54-114-AA54-116-AA54-118-AA54-120-AA54-122-AA54-124-AA54-126-AA54-128-AA54-130-AA
888
10101214182226303642424854546066
28!⁄"
333939!⁄"
4557!⁄"
64728598
111113126140153167179193206
33333333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
22!⁄"
273333!⁄"
3951!⁄"
58657891
104106119131144158170184197
8!⁄"
9101112!⁄"
15!⁄"
1721!⁄"
25!⁄"
29!⁄"
3035!⁄"
414746!⁄"
5455!⁄"
6166!⁄"
————
14!⁄"
17!⁄"
2026!⁄"
32!⁄"
384049!⁄"
57!⁄"
62!⁄"
65!⁄"
75!⁄"
7684!⁄"
93!⁄"
————
2!⁄#
2$⁄#
3!⁄#
4567!⁄"
00000000
FIXED AT 62!⁄"" THRU 3!⁄""AVAILABLE ON
SPECIAL ORDER
FIXED AT 7FIXED AT 7FIXED AT 8
7!⁄"
99
1213!⁄"
1516!⁄"
18!⁄"
20!⁄"
2223!⁄"
25!⁄"
25!⁄"
29!⁄"
30!⁄"
16!⁄"
2325!⁄"
30!⁄"
3744505158!⁄"
63!⁄"
69!⁄"
75879198
30!⁄"
4043!⁄"
49!⁄"
61!⁄"
698156!⁄"
62!⁄"
7078868695
103
P(Size)
11!⁄"
22!⁄"
33!⁄"
4568
1012141618202224262830
RISY RISH
KE
Min Max
RISY RISH
Y
Min Max
Weight
32!⁄"
43!⁄"
495465!⁄"
7789!⁄"
88!⁄"
100!⁄"
111123135147157170
252530405080
110190380550800
1,0501,3501,5002,1002,7003,0503,8505,150
Combination Chamber-Absorptive Type Inlet Silencers
Sizes 1"–1!⁄"" use U5 Series (page 3.2)
The RIS Series Inlet Silencer is a heavy-duty, all welded unit constructed of carbonsteel sheet and plate. It features anacoustically-treated outlet and will providepulse control and silencing suitable forcritical PLV applications. Sizes 4" and largerare equipped with flanged connectionsdrilled to 125/150 lb ANSI specifications.
Smaller sizes are standard with malethreaded pipe nipples. Units sized 4" and 5"are available in either flanged or male pipethreads. Exterior surfaces receive a shopcoat of rust inhibitive primer and may befinish painted in the field if desired. The RIS Series is the basic model, havingconventional end-in, end-out configuration.
P
N
N
L H D
K
Y
K
Y
E
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
*Specify -TT for male pipe threaded units.
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
10
0
20
RIS Series RISY Series(Low Side Outlet)
RISH Series(High Side Outlet)
A low side outlet version is designated RISYSeries and high side outlet configuration isdesignated RISH Series. The three types arefundamentally alike and performance isidentical. Mounting brackets and otheroptions are available—see page 2.11.
**
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SpecificationsUCD Group
Chamber TypeDischarge Silencer
The UCD Series Discharge Silencer is aheavy-duty, all welded unit constructed ofcarbon steel sheet and plate. It providespulse control and silencing for subcriticalPLV applications where the higherperformance of the URD Series on page 2.7
is not warranted. Sizes 8" and larger areequipped with flanged connections drilled to125/150 lb ANSI specifications. Exteriorsurfaces receive a shop coat of rust-inhibitive primer and may be finish paintedin the field if desired. The UCD Series is the
PartNumber D L N H K
56-108-AA56-110-AA56-112-AA56-114-AA56-116-AA56-118-AA56-120-AA56-122-AA56-124-AA56-126-AA56-128-AA56-130-AA
222630303642424854546066
61748799
113126140153167179193206
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
54678092
106119131144158170184197
14!⁄"
16!⁄"
18!⁄"
18!⁄"
21!⁄"
24!⁄"
25!⁄"
28!⁄"
31!⁄"
31!⁄"
34!⁄"
37!⁄"
P(Size)
11!⁄"
22!⁄"
33!⁄"
4568
1012141618202224262830
Min
91112!⁄"
13!⁄"
15!⁄"
17!⁄"
1920!⁄"
22!⁄"
23!⁄"
25!⁄"
27!⁄"
Max
Y
212734404855!⁄"
60!⁄"
66!⁄"
72858795
Weight
250360550650900
1,2001,3501,9502,5002,7503,4004,650
Chamber Type Discharge Silencers
DrainP
N
N
L H D
K
Y
Sizes 1"–6" use URB Series (page 2.7)
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
10
0
20
UCD Series UCDY Series(Low Side Inlet)
basic end-in, end-out configuration. A lowside inlet version is designated UCDY Series.The two types are fundamentally alike andperformance characteristics are identical.Mounting brackets and other options areavailable—see page 2.11.
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SpecificationsURB GroupURD GroupChamber TypeDischarge Silencer
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
*Specify -TT for male pipe threaded units.
PartNumber D L N H
55-101-AA55-115-AA55-102-AA55-125-AA55-103-AA55-135-AA55-104-AA55-105-AA55-106-AA55-108-AA55-110-AA55-112-AA55-114-AA55-116-AA55-118-AA55-120-AA55-122-AA55-124-AA55-126-AA55-128-AA55-130-AA
4!⁄"
6!⁄"
8101012141618222630364248485454606672
21243334465253657297
122135161181188202204239259279304
2233333333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
17202728404647596690
115128154174181193195230250270295
——7889
10111214!⁄"
16!⁄"
18!⁄"
21!⁄"
24!⁄"
27!⁄"
28!⁄"
31!⁄"
31!⁄"
34!⁄"
37!⁄"
40!⁄"
——
66!⁄"
89
1112!⁄"
14!⁄"
16!⁄"
18!⁄"
19!⁄"
21!⁄"
22!⁄"
252729
——
2229324863!⁄"
698192!⁄"
98103103126132144161
—————————82
106117!⁄"
141158!⁄"
164!⁄"
175!⁄"
175!⁄"
210!⁄"
228246272
—————————6276!⁄"
88107119!⁄"
126!⁄"
134137156!⁄"
175188203
——————89
10121415!⁄"
17!⁄"
19!⁄"
21!⁄"
22!⁄"
24!⁄"
25!⁄"
273132
K
Min
URBY, URDY URDH URDS
Y
Max Min Max Min Max
Weight
——————
1619222940!⁄"
424955!⁄"
56!⁄"
616076!⁄"
788596
10152030405570
120160370550800
1,2501,6002,3002,5002,9503,4504,4006,1507,250
Chamber Type Discharge Silencers
The URB/URD Series Discharge Silencer isa heavy-duty, all welded unit constructed ofcarbon steel sheet and plate. It providespulse control and silencing for subcriticalPLV applications. Sizes 4" and larger areequipped with flanged connections drilled to125/150 lb ANSI specifications. Smallersizes are standard with male threaded pipe
nipples. Units sized 4" and 5" are available ineither flanged or male pipe threads. Exteriorsurfaces receive a shop coat of rust-inhibitive primer and may be finish paintedin the field if desired. The URB/URD Seriesis the basic end-in, end-out configuration. A low side inlet version is designatedURBY/URDY Series; high side inlet is
P
N
N
L H D
P(Size)
11!⁄"
22!⁄"
33!⁄"
4568
1012141618202224262830
K
Y
K
Y
K
Y
K
Note: Sizes 1"–6" are URB Series;sizes 8"–30" are URD Series. Both series arefundamentally the same in design and theperformance characteristics are identical.
FIXED AT 6FIXED AT 7FIXED AT 7FIXED AT 8
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
10
0
20
URB,URD Series
URBY,URDY Series(Low Side Inlet)
URDH Series(High Side Inlet)
URDS Series(Opposed Connections)
designated URDH Series; and low opposedconnection is designated URDS Series. Thefour types are fundamentally alike andperformance characteristics are identical.Mounting brackets and other options areavailable—see page 2.11.
**
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Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
*Specify -TT for male pipe threaded units.
SpecificationsSD Group
Combination Chamber-Absorptive Type
Discharge Silencer
The SD Series Discharge Silencer is aheavy-duty, all welded unit constructed ofcarbon steel sheet and plate. It will provideexcellent pulse control and is equipped withan acoustically-treated inlet for use oncritical PLV applications. Its pulse and noiseperformance is recommended for all but themost demanding applications, which mayrequire the RD Series on page 2.9. Sizes 4"
and larger are equipped with flangedconnections drilled to 125/150 lb ANSIspecifications. Smaller sizes are standardwith male threaded pipe nipples. Units sized4" and 5" are available in either flanged ormale pipe threads. Exterior surfaces receivea shop coat of rust-inhibitive primer andmay be finish painted in the field if desired.The SD Series is the basic end-in, end-out
DrainP
N
N
L H D
K
Y
E
K
Y
KB
Y
Acoustical packing is suitable for 325˚F
P(Size)
11!⁄"
22!⁄"
33!⁄"
4568
1012141618202224262830
Part Number
54-102-AA54-125-AA54-103-AA54-135-AA54-104-AA*54-105-AA*54-106-AA54-108-AA54-110-AA54-112-AA54-114-AA58-116-AA58-118-AA58-120-AA58-122-AA58-124-AA58-126-AA58-128-AA58-130-AA
D
888
10101214182226303642424848545460
L
28!⁄"
333939!⁄"
4557!⁄"
64728598
111137150176195213233250276
N
33333333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
H
22!⁄"
273333!⁄"
3951!⁄"
58657891
104130143167186204224241267
K
8!⁄"
9101112!⁄"
15!⁄"
1721!⁄"
25!⁄"
29!⁄"
3035!⁄"
41474755!⁄"
556268
————
14!⁄"
17!⁄"
2026!⁄"
32!⁄"
38404752626172768190
SDY SDH SDS
————
14!⁄"
17!⁄"
2026!⁄"
32!⁄"
38404752626172768190
B
————89
1012!⁄"
14!⁄"
16!⁄"
18!⁄"
21!⁄"
24!⁄"
25!⁄"
28!⁄"
28!⁄"
31!⁄"
31!⁄"
34!⁄"
E
————2!⁄#
2$⁄#
3!⁄#
4567!⁄"
9!⁄"
11!⁄"
10!⁄"
12!⁄"
11!⁄"
13!⁄"
12!⁄"
14!⁄"
Min
SDY
Min
————7!⁄"
99
1213!⁄"
1516!⁄"
18!⁄"
20!⁄"
21!⁄"
23!⁄"
24!⁄"
2628!⁄"
29!⁄"
Max
Max
————16!⁄"
2325!⁄"
30!⁄"
3744506570!⁄"
87!⁄"
93!⁄"
110!⁄"
117126!⁄"
139
Min
SDS
Min
————7!⁄"
9101213!⁄"
1516!⁄"
18!⁄"
20!⁄"
21!⁄"
23!⁄"
24!⁄"
2628!⁄"
29!⁄"
Max
Max
————9!⁄"
12!⁄"
15!⁄"
16!⁄"
1824253640!⁄"
48!⁄"
50!⁄"
60!⁄"
7071!⁄"
81
Min
SDH
Min
————30!⁄"
4043!⁄"
49!⁄"
61!⁄"
698196
104!⁄"
120!⁄"
138!⁄"
146!⁄"
157!⁄"
173!⁄"
190
Max
Max
————32!⁄"
43!⁄"
495465!⁄"
7789!⁄"
113!⁄"
124!⁄"
147!⁄"
165!⁄"
182!⁄"
201!⁄"
216!⁄"
241!⁄"
Weight
152530405080
110190380550800
1,2501,6001,9002,7003,0003,9004,4005,400
Y
Combination Chamber-Absorptive Type Discharge Silencers
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
10
0
20
SD Series SDY Series(Low Side Inlet)
SDH Series(High Side Inlet)
SDS Series(Opposed Connection)
configuration. A low side inlet is designatedthe SDY Series; high side inlet, SDH Series;and low opposed connection, SDS Series.The four types are fundamentally alike andperformance characteristics are identical.Mounting brackets and other options areavailable—see page 2.11.
Sizes 1" and 1!⁄"" use URB Series (page 2.7)
Y
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Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
*Specify -TT for male pipe threaded units.
SpecificationsRD GroupCombination Chamber-Absorptive TypeDischarge Silencer
The RD Series Discharge Silencer is a heavy-duty, all welded unit constructed of carbonsteel sheet and plate. It provides excellentpulse control and is equipped with anacoustically treated inlet for use on criticalPLV applications. Pulse control and noiseattenuation provided by the RD Series is theultimate and is necessary for only the most
demanding installations. Sizes 4" and largerare equipped with flanged connections drilledto 125/150 lb ANSI specifications. Smallersizes are standard with male threaded pipenipples. Units sized 4" and 5" are available ineither flanged or male pipe threads. Exteriorsurfaces receive a shop coat of rust inhibitiveprimer and may be finish painted in the field
DrainP
N
N
L H D
K
Y
E
K
Y
KB
Y
Combination Chamber-Absorptive Type Discharge Silencers
Acoustical packing is suitable for 325˚F
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
10
0
20
RD Series RDY Series(Low Side Inlet)
RDH Series(High Side Inlet)
RDS Series(Opposed Connection)
if desired. The RD Series is the basic end-in,end-out configuration. A low side inlet isdesignated the RDY Series; high side inlet,RDH Series; and low opposed connections,RDS Series. The four types are fundamentallyalike and performance is identical. Mountingbrackets and other options are available—see page 2.11.
P(Size)
11!⁄"
22!⁄"
33!⁄"
4568
1012141618202224262830
Part Number
57-102-AA57-125-AA57-103-AA57-135-AA57-104-AA*57-105-AA*57-106-AA57-108-AA57-110-AA57-112-AA57-114-AA57-116-AA57-118-AA57-120-AA57-122-AA57-124-AA57-126-AA57-128-AA57-130-AA
D
8101012141618222630364248485454606672
L
3334435253657297
122135161181188202204239259279304
N
33333333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
H
2728404647596690
115128154174181193195230250270295
K
910101114!⁄"
16!⁄"
20!⁄"
24!⁄"
28!⁄"
3540!⁄"
44!⁄"
4753!⁄"
59!⁄"
66727878
————
161822!⁄"
28!⁄"
344247!⁄"
52!⁄"
54657281!⁄"
8793!⁄"
95!⁄"
RDY RDH RDS
————
14!⁄"
16!⁄"
20!⁄"
263239!⁄"
45!⁄"
5052!⁄"
63!⁄"
7079!⁄"
859194
B
————
10111214!⁄"
16!⁄"
18!⁄"
21!⁄"
24!⁄"
27!⁄"
28!⁄"
31!⁄"
31!⁄"
34!⁄"
37!⁄"
40!⁄"
E
————44!⁄"
5678
10!⁄"
12!⁄"
14!⁄"
13!⁄"
15!⁄"
14!⁄"
16!⁄"
18!⁄"
20!⁄"
RDY
Min
89
10121415!⁄"
17!⁄"
19!⁄"
21!⁄"
22!⁄"
24!⁄"
25!⁄"
273132
Max
2026!⁄"
304560!⁄"
667889!⁄"
95100100123130140158
RDS
Min
————89
10121415!⁄"
17!⁄"
19!⁄"
21!⁄"
22!⁄"
24!⁄"
25!⁄"
273132
Max
————
1416!⁄"
202637!⁄"
394652!⁄"
53!⁄"
585773!⁄"
768193
RDH
Min
————3343!⁄"
466579!⁄"
91110122!⁄"
129!⁄"
13740
159!⁄"
177192205
Max
————39515679
103114!⁄"
138155!⁄"
161!⁄"
172!⁄"
172!⁄"
207!⁄"
226242266
Weight
2535406080
130160410600900
1,4001,8002,5502,7503,3003,8505,0006,9508,100
Sizes 1"–1!⁄"" use URB Series (page 2.7) or use U5 Series: (page 3.2)
FIXED AT 6FIXED AT 7FIXED AT 7FIXED AT 8
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SURS Series blower silencers are heavy-duty, all welded steel construction, suitablefor application as either and inlet ordischarge silencer on rotary positive. Theseunits are designed for blowers runningabove critical transition speed, andtherefore, no acoustic packing material isincluded in the design. Instead, these unitshave a specially designed, high-performance, three chamber system whichincorporates a diffuser on the blower side of
the silencer units. The unit will provideexcellent pulse control and is designed forthe most demanding applications.
Sizes smaller than four inches are equippedwith standard male threaded pipe nipples,while the 4” and larger units have flangedconnections drilled to 125/150 lb ANSIspecifications. As with other blower silencers,the SURS Series employs a high-heataluminum paint system.
DrainP
N
N
L H D
K
Y
SURS Series SURSY Series(Low Side Inlet)
The SURS is a basic end-in, end-outconfiguration. A low-side inlet model isdesignated as the SURSY Series; theSURSY is fundamentally identical to theSURS series in both dimension andattenuation performance. Both series aredesigned to operate at pressures to 15 psi.Mounting brackets, shell lagging and otheraccessories are available for both series ofblower silencers.
Model
SURS SURSY
Part Model Part
YP D L N H
K Min. Max Weight
SURS-2SURS-2.5SURS-3SURS-3.5SURS-4SURS-5SURS-6SURS-8SURS-10SURS-12SURS-14SURS-16SURS-18SURS-20
55-A02-SS55-A25-SS55-A03-SS55-A35-SS55-A04-SS*55-A05-SS*55-A06-SS55-A08-SS55-A10-SS55-A12-SS55-A14-SS55-A16-SS55-A18-SS55-A20-SS
SURSY-2SURSY-2.5SURSY-3SURSY-3.5SURSY-4SURSY-5SURSY-6SURSY-8SURSY-10SURSY-12SURSY-14SURSY-16SURSY-18SURSY-20
55-B02-SS55-B25-SS55-B03-SS55-B35-SS55-B04-SS*55-B05-SS*55-B06-SS55-B08-SS55-B10-SS55-B12-SS55-B14-SS55-B16-SS55-B18-SS55-B20-SS
22!⁄"
33!⁄"
4568
101214161820
1212121414*16*1826303636424848
40404659597172
111136138168181188214
33333333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4
34344053536566
104129131161174181205
999
1010111216!⁄"
18!⁄"
21!⁄"
21!⁄"
24!⁄"
27!⁄"
28!⁄"
4!⁄"
4!⁄"
55!⁄"
678
10121416182022
1313152020252541515063514856
55556090
100160200520810
1,1301,4001,8002,5002,850
SpecificationsSURS Group
Chamber Type Multi-Use Silencer
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
10
0
20
Combination Chamber Type Multi-Use Discharge Silencers
*Specify -TT for male pipe threaded units.
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Accessories andOptional FeaturesUCI, RIS, ICD IRB, IRD, SD, RD,and SURS Blower Silencers
In addition to the standard accessoriesshown here, other special features such asspecial materials and finishes will be quotedon request. Contact Universal AET with yourspecific requirements.
Mounting BracketsMounting Brackets or legs are available for any of the silencers in this section.Saddle type brackets for horizontal mountand angle legs for vertical mount arestandard. See Spec. Sheet No. 1078. Special design brackets will be quoted withyour specifications.
Inspection OpeningsInspection Openings with bolted andgasketed cover plates are available installedat the time the silencer is fabricated. Theyare designed to withstand the usual range ofpressure encountered with blowers. Oneinspection opening is usually installed ineach silencer chamber for cleaning orinspection. Standard sizes include:3"" 4", 4"" 6", 6"" 8".
Pressure Vessel ConstructionAll silencers shown in this catalog may befabricated in accordance with Div. 1,Section VIII—ASME Code for UnfiredPressure Vessels. Dimensions are similarto standard models, but material types andthicknesses are selected to meet coderequirements. Prices are quoted onapplication to meet your pressure andtemperature conditions.
Oversize FlangesFrequently the blower flange size is largerthan the required silencer’s connection.Rather than use a larger silencer, it isusually more economical to use an oversizereducing flange on the silencer. This is theconventional piping practice and may beused on either inlet or discharge silencers.Example: a 10" flange size silencer hasadequate capacity for a blower with a 12"discharge flange. A flange having a drillingpattern to match the 12" blower flange butwith a 10" bore to match the silencer nozzleis substituted on the silencer inlet.
Two pipe sizes, (e.g. 10" to 14"), is therecommended maximum variation. Priceson request.
Horizontal Vertical
CBF/CBFI SeriesCompact Blower
Inlet Filter-Silencer
Filter and silencer combined in one unit.The CBF and CBFI have the acousticcapabilities of the Universal AET RIS Seriessilencers and the filtration performance ofCC series filters.
Reduced cost, overall package size, weight,storage space, freight cost and damage.
Approximately one third the size ofconventional blower silencer, with theadded benefit of excellent, high-efficiencyfiltration.
Reduced overall package noise withoutfurther acoustic treatment.
Versatile—Suitable for inlet applications inconfined areas, outdoor or indoor, withoutcompromising acoustic or pressure dropperformance.
70°F200°F300°F
L
WD
H
DP
K
Y
!⁄"" NPTpressure tap
Removable weatherhoodfor filter element access
Y
P
H
L
K
D
WDRemovable plate for filter element access
!⁄"" NPTpressure tap
CBF Series (outdoor use) CBFI Series (indoor use)
P (nom.)
CBF/CBFI
22!⁄#
34568
1012
D
88
12121616243034
89
1015172324!⁄#
35!⁄#
39!⁄#
44$⁄%
5!⁄%
7!⁄#
8!⁄#
11!⁄#
13$⁄%
17$⁄%
19$⁄%
7799
111115!⁄#
18!⁄#
20!⁄#
120175275500750
1,1002,2003,0004,300
34-702-AA34-725-AA34-703-AA34-704-AA34-705-AA34-706-AA34-708-AA34-710-AA34-712-AA
101016162020303640
13!⁄%
14$⁄%
1721!⁄%
26323946!⁄#
54!⁄#
2025506085
100200305385
34-G02-AA34-G25-AA34-G03-AA34-G04-AA34-G05-AA34-G06-AA34-G08-AA34-G10-AA34-G12-AA
6!⁄#
6!⁄#
10101212121824
12$⁄%
14!⁄%
16!⁄#
20$⁄%
25!⁄%
31!⁄%
39!⁄%
45$⁄%
53$⁄%
2025506085
100185295370
H Y K CFM CAP Part
CBF
WD L Weight Part
CBFI
B L1 Weight
Models, Dimensions, Weights and Elements
Notes: 1. Non-ASME Code construction suitable for 15" Hg vacuum.2. Weights are approximate and do no include the weight of the filter element.
81-0471*81-0471*81-106381-106381-047581-047581-116381-116381-1164
81-1203*81-1203*81-120581-120581-120781-120781-120981-120981-1210
81-1036*81-1036*81-103881-103881-104081-104081-120081-120081-1201
Paper
22!⁄#
34568
1012
P (nom.)Element Part Number
Felt Wire
*Pair of elements required (stacked).
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910
2
2.12
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
10
0
20
DP
K
Y
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CB SeriesCompact Blower Silencer
Part Number P (nom.) D L H Y K Weight
56-702-AA56-725-AA56-703-AA56-704-AA56-705-AA56-706-AA56-708-AA56-710-AA56-712-AA
22!⁄#
34568
1012
88
12121616243034
1112!⁄#
13!⁄#
182026313943
89!⁄#
10!⁄#
15172327!⁄#
35!⁄#
39!⁄#
44$⁄%
5!⁄%
7!⁄#
8!⁄#
11!⁄#
13$⁄%
17$⁄%
19$⁄%
7799
111115!⁄#
18!⁄#
20!⁄#
152535457085
170275355
120187270480750
1,0801,9203,0004,320
Model
CB-2CB-2!⁄#
CB-3CB-4CB-5CB-6CB-8CB-10CB-12
CFM CAP
Compact Blower Silencers
Y
PHL
P
D
K
500 1K 1.5K 2K 2.5K 3K 3.5K 4K 4.5K 5K 5.5K0
1
2
3
4
5
6
7
Velocity, ft/min
!P, inches of H
2 O
Pressure Drop Curves
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
10
0
20
70°F200°F300°F
This extremely compact blower silencerworks as either an inlet or dischargesilencer on rotary positive blowers. It isabout one-third the size of a standardsilencer, and reduces overall package size,cost, weight and storage space. The unit’sinternal pack material is suitable fortemperatures up to 325 degrees. The unit is
operable in conditions up to 15 psig.Flanged or threaded connections areavailable. Exterior surfaces receive a shopcoat of rust inhibitive primer.
12
34
56
78
910
UNI-BASEUltra-Wide Base
Plates/ComponentsRotary Positive Blowers
These wide base plate productsaccommodate a variety of blower packagedesigns. The UNI-BASE package and theUSI-BASE base plate use the same basicbase plate and discharge silencer. The UNI-BASE package includes the Universal AETmodel URBN high-side inlet silencer andCCF inlet air filter, while the UNI-BASE base
plate is only the basic plate and the URBYdischarge silencer. Please see page 2.7 forperformance and sizing information for theURBY series silencers, page 2.15 forinformation on the URBN series silencers,and page 8.9 for performance data, weightsand dimensions of CCF filters.
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910
2
2.14
UNI-BASE Package
UNI-BASE Base Plate Only
CCF (see page 8.9)
URBN (see page 2.15)
URBY (see page 2.7)
URBY (see page 2.7)
Size UNI-BASE Package
22!⁄#
3456
80-187380-187480-187580-187680-187780-1878
55-202-ABP55-225-ABP55-203-ABP55-204-ABP55-205-ABP55-206-ABP
55-502-AA55-525-AA55-503-AA55-504-AA55-505-AA55-506-AA
55-202-AA55-225-AA55-203-AA55-204-AA55-205-AA55-206-AA
34-L02-TT*34-L25-TT*34-L03-TT*34-L04-TT*34-L05-TT*34-L06-TT*
Base Plate Only URBN Only URBY Only CCF Only
UNI-BASE Base Plates/Components Part Numbers
*Specify “P” at end of part number for unit with pleated paper elements, “F” for pleated felt or “W” for wire mesh.Refer to page 8.11 for filter element details.
UNI-BASEUltra-Wide BasePlates/ComponentsRotary Positive Blowers
P1/P2 (nom.) D1 H1 K1 Y1 Y2 Approx. Weight
22!⁄#
3456
81010141618
272840476066
788
101112
677668
3!⁄#
4!⁄#
4!⁄#
5!⁄#
6!⁄#
7!⁄#
25355080
140170
URBN Silencers
CCF Silencers (please see page 8.9)
P (nom.) A B C CD D2 E FS
2
3456
3944!⁄#
55!⁄#
566666
1!⁄#
1!⁄#
4———
20$⁄%
2131!⁄#
37!⁄#
43!⁄#
52
10$⁄%
11!⁄%
1215!⁄#
18!⁄%
18!⁄%
81010141618
6!⁄#
6$⁄%
7!⁄#
813$⁄%
10!⁄#
1314!⁄%
15!⁄%
16!⁄#
14$⁄%
15!⁄%
23!⁄#
27!⁄#
29$⁄%
333535!⁄%
16171724!⁄#
23!⁄#
26!⁄#
56689
10!⁄%
788
101112
3031435062!⁄#
69
3!⁄#
44$⁄%
61112
212526!⁄%
29$⁄%
30!⁄#
30!⁄#
677
111212
125170270355500645
G H2 J K2 L Q (Dia.) S YApprox.Weight
UNI-BASE Base Plate (w/URBY)
Dimensions and Weights
Notes: 1. Sizes 2"–3" URBY discharge silencers are shipped standard with male pipe threaded connections. 4" and 5" URBY discharge silencers are shipped standard with malepipe threaded discharge connections and plain pipe blower connections. 6" URBY discharge silencers are shipped standard with flanged discharge connection drilledto 125/152 lb. ANSI specifications and plain pipe blower connections.
2. Sizes 2"–3" URBY discharge silencers have a 2" NPT relief valve coupling and plug. Sizes 4"–6" URBY discharge silencers have a 3" NPT relief valve coupling and plug.3. UNI-BASE base plate kit sizes 2"–4" require gussets.
Notes: 1. Sizes 2"–4" URBN inlet silencers are shipped with male pipe threaded inlets and plain pipe outlets. Sizes 5" and 6" URBN inlet silencers are shipped standard withflanged inlet connections drilled to 125/150 lb ANSI specifications and plain pipe outlets.
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2!⁄#
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om9U5 Series (page 3.2)
Highly efficient straight-through silenceravailable in pipe sizes !⁄""–6". Attenuationcharacteristics equivalent to SU5 Series.
U2 Series (page 3.3) Moderately efficient straight-throughsilencer available in pipe sizes 5"–30". Forbetter performance, use SU3, SU4, SU5, orU5 Series.
SU5 Series (page 3.4–3.5) Highest efficiency full flow annular typesilencer. Available in pipe sizes 4"–60".Larger sizes available based on application.
SU4 Series (page 3.4–3.5) Annular type silencer with performance onegrade below the SU5 Series. Available inpipe sizes 8"–60". Larger sizes availablebased on application.
SU3 Series (page 3.4–3.5) Annular type silencer with performance onegrade below the SU4 Series. Available inpipe sizes 8"–60" and larger.
Sizing Information, Pressure Drop DataThe flow area through the silencer must besufficient to accommodate the maximum flowwithout imposing excessive pressure drop.The following instructions enable theselection of the proper silencer size anddetermination of actual pressure drop. Theseinstructions assume air as the flowing gas.For other gases, density and other correctionsmay be necessary—contact Universal AET forassistance.
Data required:air flow rate (actual CFM)temperature (°F)pressure (psig)maximum pressure drop (inches of water)
2
1 Determine maximum velocity.
V = air or gas velocity, ft/min (see note 1)
!P = maximum pressure drop, inches of water
c = silencer pressure drop coefficient(see Table 1)
T = air temperature, °F (see note 2)P = operating pressure, psig
(If at atmospheric pressure,pressure ratio is unity and may beomitted from equation. If Pexceeds 15 psig, contactUniversal AET forrecommendations.)
2 Determine flow area required.
A = flow area required, ft2
Q = air flow rate (actual CFM)
3 From Table 2, select size with flow areaequal to or greater than that calculated.
4 Determine actual gas velocity in ft/min.
A = flow area from Table 2
5 Determine actual pressure drop.
c =silencer pressure drop coefficient (see Table 1)
V ! 4005!"""""""# $# $# $14.7P " 14.7
!Pc
T " 460530
QVA !
# $ # $ # $530T " 460
P " 14.714.7
V actual4005
!P ! c
U5, U2SU5SU3, SU4
.25
.75
.85
Silencer Series Pressure DropCoefficient (C)
Pressure Drop Coefficients1
0.00140.00310.00550.0120.0220.0340.0490.0670.0870.1360.1960.3490.550.791.071.41.82.2
!⁄"
#⁄$
11!⁄"
22!⁄"
33!⁄"
4568
101214161820
2.63.13.74.34.95.66.37.17.98.79.6
10.611.512.615.919.623.828.3
222426283032343638404244464854606672
Flow Area(ft2)
DiameterSize (in)
Flow Area(ft2)
DiameterSize (in)
Flow Area Size2
Notes1 Since self noise and aerodynamic noise
generation increase with velocity,absorptive silencers are usually sized for4,000–8,000 ft/min. In no case shouldthe velocity exceed 15,000 ft/min,regardless of pressure drop allowed.
2 Typical attenuation curves indicate thecharacteristics of the silencer series andare neither a minimum nor a guarantee foran individual silencer. Individual silencerperformance can be affected by soundsource characteristics including puretones, flow velocity, adjacent piping, andtemperature.
The absorptive type silencer is the classic dissipative design, deriving its noise control properties from the basic fact that noiseenergy is effectively “absorbed” by varioustypes of fibrous packing materials. Moretechnically, as sound waves pass throughthe spaces between the tightly-packed small-diameter fibers of the absorptive material,the resulting viscous friction dissipates thesound energy as small amounts of heat.
GeneralInformation
Absorptive Silencers
# $# $T " 460530
14.7P " 14.7Actual CFM ! (Standard CFM)
QAV actual !
Absorptive silencers are very effective on highfrequency noise (500–8,000 Hz). At frequenciesabove and below this range, attenuationperformance progressively diminishes.
Since noise is absorbed by the packingmedia, absorptive silencers do not rely oninternal baffles, tubes or other restrictivedevices to achieve noise reduction.Consequently, absorptive silencers generally
employ “straight-through” or similar internal designs which impose very little air flow restriction.
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9
PartModel
U5 SeriesStraight-ThroughAbsorptive Silencer
The U5 Series is a premium, straight-through, absorptive silencer. It providesexcellent noise attenuation due to its veryhigh length to diameter ratio. It is especiallywell suited for inlet service on small rotarypositive or centrifugal blowers or thedischarge of vacuum pumps. Mild steelconstruction with enamel paint.
Common Applicationsrotary positive/centrifugal blowersvacuum pump dischargeair valves and cylinderssmall low-pressure ventshigh frequency noise sources
U5-!⁄"U5-#⁄$U5-1U5-1!⁄$
U5-1!⁄"
U5-2U5-2!⁄"
U5-3U5-4U5-5U5-6
11-150-AA11-170-AA11-101-AA11-121-AA11-115-AA11-102-AA11-125-AA11-103-AA11-104-AA11-105-AA11-106-AA
!⁄"
#⁄$
11!⁄$
1!⁄"
22!⁄"
3456
3!⁄$
3!⁄$
3!⁄$
3!⁄$
4!⁄$
5!⁄%
6!⁄%
6&⁄%
81012
811141619#⁄$
2633!⁄"
36!⁄"
48'⁄%
5763
————!⁄"
!⁄"
!⁄"
!⁄"
!⁄%
33
811141618'⁄%
2532!⁄"
35!⁄"
48#⁄$
5157
23346
1015204060
100
P D L N H Weight
4045
63 125 250 500 1K 2K 4K 8K
105
15
0
20253035
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
NoteU5 series standard paint and acousticalpacking are suitable for 325°F.
N N
P P
HL
D
1. Sizes !⁄"" through 1!⁄$" are constructed with one-piece tapped heads.The tapped opening is approximately flush with the end on the shell.
2. Sizes !⁄"" through 4": female NPT pipe connections.3. Sizes 5" and 6": 125#/150# ANSI drilled flanges.
Absorptive Material
Straight-Through Absorptive Silencer
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U2 SeriesStraight-Through
Absorptive Silencer
The U2 Series is an economical straight-though silencer for applications requiringlower-degree noise attenuation. It isfundamentally similar to the U5 Series, buthas lesser attenuation due to its relativelylow length to diameter ratio. Mild steelconstruction, primer-coated exterior.
Common Applicationsintermediate size rotary positive blower inletcentrifugal blower inlet or discharge intermediate size dry vacuum pump dischargegas turbine inlethigh-speed centrifugal compressor inlethigh frequency noise sources
PartModel
U2-5U2-6U2-8U2-10U2-12U2-14U2-16U2-18U2-20U2-22U2-24U2-30
10-105-AA10-106-AA10-108-AA10-110-AA10-112-AA10-114-AA10-116-AA10-118-AA10-120-AA10-122-AA10-124-AA10-126-AA
568
101214161820222430
101214161820222426283036
364053657789
101113128140152189
333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
30344658708294
106119131143180
4570
105160220340440530700820
1,0701,940
P D L N H Weight
4045
63 125 250 500 1K 2K 4K 8K
105
15
0
20253035
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
Note:U2 series standard paint and acousticalpacking are suitable for 325°F.
N NHL
DP
All sizes are furnished with flanged connectionsto match 125#/150# ANSI drilling.
P
Absorptive Material
Straight-Through Absorptive Silencer
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9
SU SeriesAnnular FlowAbsorptive Silencer
4045
63 125 250 500 1K 2K 4K 8K
105
15
0
20253035
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
SU5 SeriesThe SU5 Series is our highest gradestandard absorptive silencer. Its designconsists of two concentric perforatedcylinders lined with acoustical pack, formingan annular flow path. This design featuresfull blocked-line-of-sight, while providingfull flow area for low resistance. Mild steelconstruction, primer-coated exterior.
SU4 SeriesThe SU4 Series provides lower attenuation, ranking just below the SU5Series. The design of this unit features abullet centered in the flow tube to provideannular flow path and partial blocked-line-of-sight. Pressure drop is only slightlygreater than the SU5. Mild steelconstruction, primer-coated exterior.
4045
63 125 250 500 1K 2K 4K 8K
105
15
0
20253035
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
SU3 SeriesThe SU3 Series is the most economical ofUniversal AET’s three grades of annulardesign silencers. Its design is nearlyidentical to the SU4, including annular flowpath and partial blocked-line-of-sight.Pressure drop coefficient is the same as forthe SU4 Series. Mild steel construction,primer-coated exterior.
Common Applicationsinlet and discharge of high-speed, low-pressure centrifugal compressorsand blowers (discharge P < 15 psig)industrial fan inlet and dischargehigh-pressure centrifugal compressors inletgas turbine inletdry vacuum pump dischargesome low-pressure vents (< 15 psig)high-frequency noise sourcesinlet of turbocharged reciprocating engines
12" size and smaller24" size and larger
Note:SU Series standard paint and acousticalpacking are suitable for 325°F.
N NHL
DP
All sizes furnished with flanged connections to match 125#/150# ANSI drilling.
P
Absorptive Material
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SU SeriesAnnular Flow
Absorptive Silencer
Model Part P D L N H Weight
SU5-4SU5-5SU5-6SU5-8SU5-10SU5-12SU5-14SU5-16SU5-18SU5-20SU5-22SU5-24SU5-26SU5-28SU5-30SU5-32SU5-34SU5-36SU5-42SU5-48SU5-54SU5-60SU4-8SU4-10SU4-12SU4-14SU4-16SU4-18SU4-20SU4-22SU4-24SU4-30SU4-36SU4-42SU4-48SU4-54SU4-60SU3-8SU3-10SU3-12SU3-14SU3-16SU3-18SU3-20SU3-22SU3-24SU3-26SU3-28SU3-30SU3-32SU3-34SU3-36SU3-42SU3-48SU3-54SU3-60
14-104-AA14-105-AA14-106-AA14-108-AA14-110-AA14-112-AA14-114-AA14-116-AA14-118-AA14-120-AA14-122-AA14-124-AA14-126-AA14-128-AA14-130-AA14-132-AA14-134-AA14-136-AA14-142-AA14-148-AA14-154-AA14-160-AA13-108-AA13-110-AA13-112-AA13-114-AA13-116-AA13-118-AA13-120-AA13-122-AA13-124-AA13-130-AA13-136-AA13-142-AA13-148-AA13-154-AA13-160-AA12-108-AA12-110-AA12-112-AA12-114-AA12-116-AA12-118-AA12-120-AA12-122-AA12-124-AA12-126-AA12-128-AA12-130-AA12-132-AA12-134-AA12-136-AA12-142-AA12-148-AA12-154-AA12-160-AA
4568
1012141618202224262830323436424854608
10121416182022243036424854608
101214161820222426283032343642485460
1012121820242628303636424248485460606678849014161820222426283036424854606614161820222426283030363636424248546066
21!⁄"
26263644!⁄"
5361!⁄"
6874788991
10210411512813614517018619821033354751596373!⁄"
73!⁄"
85!⁄"
108122137161!⁄"
178192!⁄"
31353939474749!⁄"
55!⁄"
55!⁄"
6163!⁄"
626875808389!⁄"
96108!⁄"
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
66666663!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
66663!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
6666
15!⁄"
20202937!⁄"
4654!⁄"
61676980829395
10611612413315817518619826284044525664!⁄"
64!⁄"
76!⁄"
99113125149!⁄"
166180!⁄"
24283232404040!⁄"
46!⁄"
46!⁄"
5254!⁄"
535966717177!⁄"
8496!⁄"
305560
120195290390500650950
1,0801,4001,5802,2002,6003,1503,6004,5006,2008,200
10,30012,500
90120180240320370490530720
1,3402,0203,2004,1005,4007,300
85120155200270290350420500680830890
1,1201,3601,4901,9202,6003,3004,430
SU5
SU4
SU3
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10
Orde
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HV SeriesCombination Vent Silencers
Versatile SilencersHV Series vent silencers effectively silencehigh-velocity air, steam, and gas vents andblowdowns to atmosphere where sonic orcritical conditions exist in the valve. Typical applications include:
steam boiler relief valvessuperheater header relief valvesboiler startup and purgehigh-pressure air ventsnatural gas blowdownsswitch valvescompressor blowoffsautoclavessteam ejectors
Standard Featuresinlet plenum covered with outer acousticwrap and lag shellhighly absorptive fiberglass acoustic filland heavy-gauge perforated face sheetsinlet nozzle and diffuser with flangedrilled to 150# ANSI standardslifting lugs and bottom drainheavy-duty welded steel constructionhigh-heat aluminum paint systemvertical or horizontal installation
Optional Featureshigh-temperature acoustic fillmaterial construction options such asstainless steel, Monel, and Hastelloyinspection openingsmounting brackets and other specialsupportsoutlet head and nozzlerestrictive diffuser built to ASME SectionVIII, Division I, to maintain backpressure or control blowdown timeelbows, tailpipes, and weatherhoodsspecial paintsside inlet
A Complete SolutionUniversal AET’s extensive in-houseengineering, manufacturing, and testingfacilities ensure an optimized process,mechanical and acoustic solution for anyapplication.
The concentric annular ring design (left) and the wrapped Acousti-Tube vent silencer design (right) offer a choice of silencer profile and configuration to meet site-specific requirements.
Annular Ring Acousti-Tube™
High-EfficiencyAcoustic Pack
Designed forOptimum SpaceConsiderations
All-Welded SteelOuter Shell
Pack Retention with Pre-Compression
Lower ChamberInsulation
(Except HV5 and HV10)
Inlet Diffuser,Depending on
Application
Easy To Specify and OrderVent and blowdown silencers are seldom asimple catalog selection. Usually, thepurchaser provides detailed specifications anda system description that enables UniversalAET to design a custom solution.
An even easier way is to simply send thevalve manufacturer’s data sheet for a vent toUniversal AET and the experienced sales staffwill recommend a silencer best suited for theapplication.
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910
Orde
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Info
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MethodologyVent Silencers
The HV Series comes with an inlet diffuseror orifice plate that is a critical element tothe acoustic and mechanical performance ofthe silencer. Both the inlet nozzle and thediffuser/orifice plate are designed andconstructed to withstand the thermal andimpact stresses produced in high-pressure,high-temperature, continuous orintermittent vent and blowdown service.
In vent applications, critical flow will occurfor most gases at valve upstream pressuresgreater than twice the outlet pressure. Ventand blowdown noise levels increase withincreased pressure drop and are alsoaffected by valve aerodynamic recoverycharacteristics. Large valve, low-pressurevents will produce relatively broadband low-frequency noise, while high-pressure ventswith small valves will produce high-frequency noise.
Subsonic (or noncritical flow) low-pressurevent and blowdown applications do notrequire, nor in most cases does the valvehave pressure drop available to permit, theuse of an inlet diffuser. Contact UniversalAET for silencer recommendations when acombination of both low pressure drop andacoustic requirements must be met.
The HV Series is offered in six standardacoustic ratings, ranging in attenuation from15 to 70 db. The HV05 is offered forapplications where only minimum noisereduction is necessary, while the HV30 isoffered for applications where maximumsilencing is necessary. Acoustic ratings areoffered in sizes that cover a wide range ofgas flow.
HV20 and HV30 acoustic ratings are offeredfor standard pipe diameters from 2" to 112".All other acoustic ratings are offered forstandard pipe diameters of 12" to 112".
Application AnalysisUse the following design information fromthe valve data sheet for system analysis andsilencer selection:
1 Type of gas
2 Molecular weight or specific gravity
3 Ratio of specific heats
4 Flow rate (lb/hr, ACFM or SCFM)
5 Pressure and temperature upstream ofvalve and silencer
6 Maximum allowable pressure drop(PSI) for valve and silencer
7 Manufacturer’s name, and valve typeand size
8 Unsilenced noise levels from valve (ifavailable)
9 Silenced noise level (required atdesired distance from source)
10 Silencer inlet size and pressure rating
11 Inlet orientation, axial or side
12 Silencer orientation, vertical orhorizontal
13 Piping arrangement, includingschematic if available
14 Other required options
Form 88-0063 is available to record thisand other information in a standard format(see page 4.4). Using this information,Universal AET will prepare computeranalyses and a comprehensive technicalproposal and price quotation. Silencerselection is based upon optimization of flowvelocity, required acoustical performance,and pressure drop.
We are skilled in the application of processengineering principles that are needed tomeet your performance requirementssuccessfully. A key element of a successfulvent application is proper assignment ofpressure drop in the piping, valve, and ventsilencer. Valve performance and life can beconsiderably extended by appropriatedistribution of pressure drop in the pipingsystem, valve, and vent silencer. In manyinstances it is possible to reduce thepressure drop across the valve body to lessthan critical. This results in reduced valveactuator open/close force requirements.Reduced valve wear caused by cavitationdamage and reduced through-valve-bodynoise are added benefits of this approach.
Universal AET can verify the valve flow andpressure drop characteristics from any valvemanufacturer’s data sheet. We offer acomplete application engineering solution,including determination of blowdown time,bottled volume calculations, and completevalve, pipe treatment, and vent dischargeacoustic performance predictions.
HV05
Series
HV10HV15HV20HV25HV30
Industrial
Classification
CommercialSuburbanResidential
HospitalCritical
15–20
AverageDynamic
Insertion Loss(dBA)
20–3030–4040–5050–6060–70
Silencer Ratings by Grade Classification1
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Application NotesPipe size immediately downstream from avalve affects the noise spectrum octaveband distribution. Universal AET hasdeveloped proprietary methods to predictthis distribution and accurately select theappropriate balance of reactive andabsorptive elements in the vent silencerdesign.
Annular vent silencers are assembled withstructural members that accommodatethermal expansion in high-temperatureapplications. The acoustic fill is long fiber,noncombustible, inert, vermin andmoisture-resistant fiberglass of at leastfour-pound-per-cubic-foot density,protected by both a fiberglass cloth and aperforated metal face sheet. The silencer ispacked with a minimum of 10%compression fill; pack retaining ringsminimize voids and settling of the fill.
The silencer is designed so the inlet flangeand diffuser are matched to the dischargerating of the valve. Often, Universal AET cancreate a more cost-effective valve and pipingsystem by using a restrictive diffuser ororifice plate to stage the system pressuredrop. For conservatism, vent silencers withrestrictive diffusers are designed withpressure ratings that match the PSV inletpressure rating. However, it is important toensure that the control valve will notmalfunction from the rated back pressure ofthe restrictive diffuser by reviewing the valvemanufacturer’s data sheet.
Customers are encouraged to contact theCompressed Gas Association (CGA) formore standards related to preparationand cleaning for applications in pureoxygen service.
Construction FeaturesUniversal AET vent silencers are weldedheavy-duty units. The inlet nozzle anddiffuser are constructed of steel and arewelded. The diffuser provides controlledpressure expansion to atmosphere anduniform flow distribution through theacoustic section of the silencer.
The lined inlet plenum (expansion chamber)of the silencer is designed with a doubleshell separated by a layer of acousticinsulation and sound-deadening material.The inner shell is solid to prevent shell-radiated noise and migration of the acousticfill. The transmission loss across theplenum and bottom head is comparable tothe silencer attenuation.
ProductDescriptionVent Silencers
Vent SilencerSpecification Sheet
Name ________________________________________________________ Date__________________________
Company ________________________________________________________ Phone ________________________
Address ______________________________________________________ Fax__________________________
E-mail ________________________________________________________
Project Reference ________________________________________________
Type of Gas____________________________
Molecular Weight____________________________
Ratio of Specific Heats____________________________
(Peak flow determined by valve mfr.) Flow Rate____________________________ pounds per hour
Pressure Upstream of Valve____________________________ PSIA
Temperature Upstream of Valve____________________________ °F
Maximum Allowable Pressure Drop____________________________ PSI
Intermittent or Continuous Service____________________________
Type______________ Brand/Model______________ Size______________ Rating______________
Pressurized Volume____________________________ ft3
Maximum Blowdown Time____________________________ minutes
Final Downstream Pressure____________________________ PSIA
(Please provide unsilenced noise levels if available. Include distance and direction from source and attach any schematics or sketches if available.)
Unsilenced Noise Level ________ SPL dB(A) overall at________feet
Required Silenced Noise Level ________ SPL dB(A) overall at________feet
Silencer Inlet Size and Rating ____________________________________________________________
Maximum Silencer Dimensions ____________________________________________________________
Inlet Orientation ________Axial ________Side
Silencer Orientation ________Vertical ________Horizontal
Supports ________Skirt and Base Ring ________Shell Lugs ________Legs
________Saddles ________Nozzles ________Other
Shell____________________________________________________________________
Internals____________________________________________________________________
Standard Hand tool cleaning, per SSPC-SP2 and solvent cleaning per SSPC-SP1 with high-heat aluminum paint finish.
Optional ____________________________________________________________
Additional Comments ______________________________________________________________________________________
______________________________________________________________________________________________________
63 125 250 500 1K 2K 4K 8K31.5
Octave Band Center Frequency (Hz)
Conditions
Valve
BlowdownApplication
NoiseSpecifications
MountingRequirements
Special MaterialRequirements
Finish
Please furnish all information available.
Form 88-0063 Rev. 3, 6/3/13
Tel.: 888.300.4272 • Fax: 608.873.4298 • E-mail: [email protected] • Web: www.universalAET.com
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GeneralInformation
Industrial Fan Silencers
Primary air fans, forced draft fans andinduced draft fans generally require someform of acoustical treatment. Mostapplications require inlet and/or outletsilencers to meet OSHA and other noiserequirements. For continuous exposure, amaximum of 90 dBA is generally specifiedto avoid hearing damage. Whenconversation near the fan is desired, levelsof 80 dBA and less are often needed.
Universal AET designs and manufactures acomplete line of silencers for application onall fan types. Computer enhanced technologydeveloped for fan, turbine, and other airmoving equipment enables Universal AET tooffer a cost-effective solution for every fan silencing application.
Each of the four designss in this section hasunique advantages over the others,depending upon the application, pressuredrop and space utilization. This catalogcovers standard models and sizes andprovides basic information to evaluate themerits of the individual designs for yourapplication. Special configurations,materials, higher temperatures, and sizesare available upon request.
AFS Series Absorptive/Reactive SilencerThe AFS series fan silencer combines areactive and absorptive chamber design thatboth reflects acoustic energy and dissipatesit with absorptive pack material.Constructed from plate and sheet steel in anall-welded, straight-through flow pathdesign, the AFS series is suitable for mostapplications on the inlet and discharge ofcentrifugal or axial blowers, especially whenlow pressure drop is required. The standardAFS silencer is suitable for temperatures upto 325°F.
Acousti-VaneAbsorptive/Parallel Baffle SilencerThe Acousti-Vane silencer comes instandard cross-sections and lengths thatcover a wide range of applications andprovide economical solutions to a broadrange of noise conditions. Standard unitscan be adapted for use in non-standard orapplication-specific configurations.
The Acousti-Vane is available in threestandard models:
LPThe low-pressure drop Acousti-Vane haslower pressure drop than the other twomodels and is the most economical of thethree. The LP is the silencer of choice whenpressure drop is critical and a relatively smallamount of noise attentuation is needed.
MPThe moderate pressure-drop Acousti-Vaneoffers greater acoustic performance thanthe LP at a slightly higher pressure drop.The MP models meets most noiseattenuation specifications.
HPThe high-performance Acousti-Vaneprovides maximum acoustic performance ata higher pressure drop than the LP or MP.The HP models is ideal for the mostdemanding acoustical environment.
The steel frame of the Acousti-Vanesilencers has high sound transmission loss.The standard shell finish includes solvent-cleaning by SSPC-SP-1, shop coat primerinside and outside, and a blue enamelcoating outside. The paint systemwithstands internal gas and skintemperatures up to 200ºF. Optional paintsystems are available.
Acousti-TubeAbsorptive/Tubular Flow SilencerThe modular, compact, lightweight Acousti-Tube silencer knocks out high-frequencynoise while minimizing pressure drop.
The Acousti-Tube silencer is available instandard cross-sections and lengths, whichcover a wide range of product applicationsand are economical solutions to noiseproblems. The silencer’s modular designallows customization for non-standardconfigurations without any loss of acousticperformance or increased pressure loss.
Composite materials are used in theflowpath to reduce corrosion andmaintenance. The lightweight, easy-to-handle design reduces shipping cost andinstallation time. The Acousti-Tube modulesare factory-assembled in a high-transmission-loss steel frame. The framehas a standard high-performance, two coatpaint system on interior and exteriorsurfaces suitable for outdoor installations.
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SizingInformationIndustrial Fan Silencers
In order to properly size a fan silencer, theflow area through it must be sufficient toaccommodate the maximum flow withoutimposing excessive pressure drop. Thefollowing instructions enable you to selectthe proper silencer size and determineactual pressure drop. These instructionsassume flowing gas is air. For other gases,density, and other corrections, contactUniversal AET for assistance.
Data required:air flow rate (actual CFM)temperature (°F)pressure (psig)maximum pressure drop (inches of water)
QV
A required !
! "! "T " 460530
14.7P " 14.7Actual CFM ! (Standard CFM)
1 Determine the maximum velocity toachieve the required pressure drop.
V = air or gas velocity, ft/min (see Note 1)
!P = maximum pressure drop, inches of water
c = silencer pressure drop coefficient(see page 5.5)
T = air temperature, °F (see Note 2)P = operating pressure, psig
(if at atmospheric pressure,pressure ratio is unity and may beomitted from equation; if Pexceeds 15 psig, contactUniversal AET forrecommendations)
2 Determine flow area required.
A required = flow area required, ft2
Q = air flow rate (actual CFM)
For reference, if SCFM is given ratherthan ACFM, then convert using thefollowing equation.
3 From Table 1 or the tables on page 5.5select a size with a flow area equal toor greater than that calculated in step 2.
4 Determine the actual gas velocity infeet per minute.
A = flow area of size of silencer chosen, ft2
5 Determine actual pressure drop ininches of water.
QA
V actual !
0.0870.1360.1960.3490.5500.7901.0701.4001.8002.2002.6003.1003.7004.3004.9005.6006.3007.1007.9008.7009.600
10.60011.50012.60015.90019.600
4568
10121416182022242628303234363840424446485460
Flow Area(ft2)
Diameter(in)
Conversion—Pipe Diameterfrom Flow Area1
Notes1 Since self noise and aerodynamic noise
generation increase with velocity,absorptive silencers are usually sized for4,000–8,000 ft/min. In no case shouldthe velocity exceed 15,000 ft/min,regardless of pressure drop allowed.
2 Typical attenuation curves indicate thecharacteristics of the silencer series andare neither a minimum nor a guaranteefor an individual silencer. Individualsilencer performance can be affected bysound source characteristics includingpure tones, flow velocity, adjacent piping,and temperature.
2
V ! 4005#$$$$$$$! "! "! "14.7P " 14.7
!Pc
T " 460530
! "! "! "530T " 460
P " 14.714.7
V actual4005
!P actual ! c
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AFS SeriesCombination Type Silencer
Featuresstraight-through flow pathcombination reactive and absorptivedesign for best mid-frequency attenuationlow-pressure droppressure drop coefficient, c = 0.6 for pipesizes < 24" and c = 1.0 for 24" and larger124/150# ANSI drilled plate flangesall-welded mild steel construction primer-coated exterior
Common Applicationscentrifugal blowers inlet and dischargeaxial blowers inlet and discharge industrial fans inlet and dischargecentrifugal compressors inlet small reciprocating compressors
6" pipe size12" pipe size24" pipe size
NoteAFS series standard paint and acousticalpacking are suitable for 325°F.
40
50
63 125 250 500 1K 2K 4K 8K
10
0
20
30
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
Model
AFS-4AFS- 5AFS-6AFS-8AFS-10AFS-12AFS-14AFS-16AFS-18AFS-20AFS-22AFS-24AFS-26AFS-28AFS-30AFS-32AFS-34AFS-36AFS-42AFS-48
Part
61-104-AA61-105-AA61-106-AA61-108-AA61-110-AA61-112-AA61-114-AA61-116-AA61-118-AA61-120-AA61-122-AA61-124-AA61-126-AA61-128-AA61-130-AA61-132-AA61-134-AA61-136-AA61-142-AA61-148-AA
P
4568
10121416182022242628303234364248
D
1214162024283636424848546060666666728496
L
3440!⁄"
4760!⁄"
67!⁄"
74!⁄"
89100!⁄"
108124129143157168!⁄"
182187!⁄"
193207220272
N
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
66
H
2834!⁄"
4153!⁄"
60!⁄"
67!⁄"
8293!⁄"
101115120134148159!⁄"
173178!⁄"
184198208260
Weight
6080
135220380500980
1,1501,4001,8001,9502,4503,6704,1004,8255,1005,4006,4009,500
15,000
Combination Type Silencer
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Acousti-VaneAbsorptive Parallel Baffle TypeRectangular Silencers
The Acousti-Vane silencer is designed as astand-alone silencer or in series with USI’sAcousti-Tube silencer. The superior noiseattenuation of the Acousti-Vane, combinedwith the superior high-frequency performanceof the Acousti-Tube, provides excellent noisecontrol over a broad spectrum.
The Acousti-Vane silencer comes instandard cross-sections and lengths thatcover a wide range of applications andprovide economical solutions to a broadrange of noise conditions. Standard unitscan be adapted for use in non-standard orapplication-specific configurations.
The Acousti-Vane is available in three standard models:
LPThe low-pressure drop Acousti-Vane hasthe lowest pressure drop and is the mosteconomical of the three.
MPThe moderate-pressure drop unit offersgreater acoustic performance than the LP ata slightly higher pressure drop and meetsmost noise attenuation specifications.
HPThe high-performance Acousti-Vaneprovides the maximum acousticperformance. The HP model is ideal for themost demanding acoustical environment.
The steel frame for Acousti-Vane silencershas high sound transmission loss. The paintsystem withstands internal gastemperatures and skin temperatures up to200°F. Optional paint systems are available.
How Do I Choose?Three parameters are needed to select thecorrect silencer: (1) required acousticinsertion loss, (2) allowable pressure loss,and (3) the flow in actual cubic feet perminute (ACFM) of your equipment.
Follow these steps to find the silencer thatis most appropriate for your application.
1 Determine the required dynamicinsertion loss by octave band for yourequipment and select the minimumsilencer length that gives the requiredloss for each model.
2 Determine the allowable pressure dropand flow in ACFM for your application.To find the pressure drop for gastemperatures other than 60°F, multiplythe selected value by [520/(actual gastemperature °F " 460)].
3 Choose the Acousti-Vane model foryour application. From the three graphson page 5.5, choose the one that has theallowable pressure drop on the Y-axis.Read straight across until the line meetsthe pressure drop curve. Thecorresponding X-axis value is themaximum face velocity that will maintainthe pressure drop requirement.
4 Divide the ACFM by the required facevelocity to find the minimum silencercross-section that would give therequired pressure drop.
Face velocity is defined as the flow ratein ACFM divided by the silencer facearea in square feet (W # H).
5 Select the silencer from the tables onpage 5.5. Replace L in the part numberwith the length of silencer you found instep 2. Specify whether the silencer isan LP, MP, or HP model. The pressuredrop will be equal to or slightly belowthe allowable pressure drop youselected. For special applications thatrequire minimum pressure drop anddemanding acoustic specifications,contact Universal AET.
Example Case: Acousti-Vane Selection for a Gas Turbine Inlet1 The insertion loss needed to
attenuate noise is determined to be4, 7, 12, 20, 20, 18, 18, 14, 11 inthe octave band center frequencies31.5 Hz–8 kHz.
2 Tables 1–3 on page 5.5 show thata 12-ft LP, 9-ft MP or a 5-ft HPwould satisfy the requirements.
3 For this application, the allowablepressure drop is 0.25 inches ofwater. Which eliminates the HPmodel (see graph to the right ofthe table). For purposes ofexample, the flow in ACFM isassumed to be 30,000.
4 The graphs on page 5.5 show thatthe maximum face velocity toachieve 0.25 inches of water is2,000 ft/min for the 12-ft LP and1,500 ft/min for the 9-ft MP.
5 Divide the flow in ACFM by therequired face velocity for eachsilencer:
LP ! 30,000/2,000 ! 15 ft2
MP ! 30,000/1,500 ! 20 ft2
6 In Table 4 on page 5.5, find thesilencer size that is equal to orgreater than 15 ft2 for the LP modeland 20 ft2 for the MP. In thisexample, the 4 # 4 LP (at16 ft2 face velocity) and 4 # 6 MP(at 24 ft2)meet your specifications,so you choose between:
AV $ 4 # 4 $ 12 $ LP
or
AV $ 4 # 6 $ 9 $ MPAcousti-Vane dimensions. The silencercomes in standard cross-sectionaldimensions and standard flange patterns.Flange patterns also can be designed tomatch your specifications. Silencers maybe applied at temperatures that rangebetween $20°F and 200°F. For standardflange patterns, silencer weights, and otherdetails, request Technical Bulletin 94-1327.
10Ro
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0.10
0.12
0.14
0.16
0.18
1K 1.1K 1.2K 1.3K 1.4K 1.6K1.5K 1.7K 1.8K 1.9K 2K
0.04
0.02
0.06
0.08
Face Velocity, ft/minPressure Drop, inches of H
2 O
12 ft. Acousti-Vane 9 ft. Acousti-Vane 6 ft. Acousti-Vane 3 ft. Acousti-Vane
0.40
0.50
0.60
0.70
0.80
1K 1.1K 1.2K 1.3K 1.4K 1.6K1.5K 1.7K 1.8K 1.9K 2K
0.10
0.00
0.20
0.30
Face Velocity, ft/min
Pressure Drop, inches of H2 O
3456789
101112
1122233344
2344556677
4567889
101112
59
1013151618202224
79
1113151821242628
58
1012121416202020
3479
111315181818
245679
11141414
1224579
111111
Octave Bands (Hz)SilencerLength (ft) 31.5 63 125 250 500 1K 2K
LP (low pressure drop) Models
4K 8K
1
3456789
101112
3333445566
4455667788
7899
101012141515
10121518202224252628
12162025272930323436
13162022242729323232
11131518212426282828
9111213141516181818
57899
1012141414
Octave Bands (Hz)SilencerLength (ft) 31.5 63 125 250 500 1K 2K
MP (moderate pressure drop) Models
4K 8K
2
3456789
101112
3344555667
5678899
101011
9101214151617191920
13162123252729313335
15182226303336394245
16202327313641464748
16202427313336394245
12141619212427303030
7101214161820222324
Octave Bands (Hz)SilencerLength (ft) 31.5 63 125 250 500 1K 2K
HP (high performance) Models
4K 8K
3
Acousti-Vane Part Numbers and Face Areas4
2.00
2.50
3.00
3.50
4.00
1K 1.1K 1.2K 1.3K 1.4K 1.6K1.5K 1.7K 1.8K 1.9K 2K
0.50
0.00
1.00
1.50
Face Velocity, ft/min
Pressure Drop, inches of H2 O
Notes: Dynamic insertion loss in dB for face velocities <1500 ft/min, and pressure drop for gas temperatures of 60 ˚F. To find the pressure drop for gas temperaturesother than 60˚F, multiply the selected value by [520/(actual gas temperature ˚F + 460)]. Contact Universal AET for more information about face velocities >2000 ft/min.
AV-2 #2-L-mAV-2 #3-L-mAV-2 #4-L-mAV-3 #4-L-mAV-4 #4-L-mAV-4 #6-L-mAV-5 #6-L-mAV-6 #6-L-mAV-6 #8-L-mAV-7.5#7.5-L-mAV-8 #8-L-m
Part Number (AV-H # W-model)
468
1216243036485664
Face Area (ft2)
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2.002.252.50
1K 1.1K 1.2K 1.3K 1.4K 1.5K 1.6K 1.7K 1.8K 1.9K 2K
0.500.25
0.75
0.00
1.001.251.501.75
Face Velocity, ft/min
Pressure Drop, inches of H2 O
5 ft. Acousti-Tube4 ft. Acousti-Tube3 ft. Acousti-Tube2 ft. Acousti-Tube
Acousti-Tube dimensions.The Acousti-Tube silencer comes in standardcross-sectional dimensions and standardflange patterns. Flange patterns also can bedesigned to match your specifications.
2345
0011
2234
5678
79
1113
13172023
26324042
40505560
39485356
32374143
Octave Bands (Hz)SilencerLength (ft) 31.5 63 125 250 500 1K 2K
Dynamic Insertion Loss in dB for Face Velocities <1500 ft/min
4K 8K
1
Figure 1Pressure Drop versus Silencer FaceVelocity. To find the pressure drop for gastemperatures other than 60°F, multiply theselected value by 520/(actual gastemperature °F " 460).
Acousti-TubeAbsorptive Tubular Flow TypeRectangular Silencers
The Acousti-Tube silencer comes instandard cross-sections and lengths, whichcover a wide range of applications and areeconomical solutions to industrial fan noiseproblems. The silencer’s modular designenables customization for non-standard configurations without any loss of acousticperformance or increased pressure loss.
Composite materials are used in the flowpathto reduce corrosion and maintenance.
The modular, compact, lightweight Acousti-Tube silencer knocks out high-frequencynoise while minimizing pressure drop.
How Do I Choose?As with the Acousti-Vane, three parametersare needed to select the correct Acousti-Tube silencer: (1) required acousticinsertion loss, (2) allowable pressure loss,and (3) the flow in actual cubic feet perminute (ACFM) for your equipment.
Follow these steps to choose theappropriate silencer:
1 Determine the required dynamicinsertion loss by octave band for yourequipment. Use Table 1 to select theminimum silencer length that gives therequired octave band insertion loss.
2 Determine the allowable pressure dropand ACFM for your application. In Figure 1, find the Y-axis value for theallowable pressure drop. Read straightacross the graph to the pressure dropcurve. The corresponding X-axis value isthe maximum face velocity that willmaintain the pressure drop requirement.
3 Divide the ACFM by the required facevelocity to find the minimum cross-section that gives the required pressuredrop. Face velocity is defined as the flowrate in ACFM divided by the silencer facearea in square feet (W # H).
4 Select the silencer model from Table 2.Replace L in the model number with thelength of silencer you found in step 2.The part number for ordering will be theprefix 07-, the dimensions of the silencer,and the suffix -AA. So a 2 # 2 # 4 silencerwould have a part number of 07-224-AA. For special applications thatrequire minimum pressure drop anddemanding acoustic specifications,contact Universal AET.
Acousti-Tube Part Numbersand Face Areas2
AT-2 #2-LAT-2 #3-LAT-2 #4-LAT-3 #4-LAT-4#4-LAT-4 #6-LAT-5 # 6-LAT-6 #6-LAT-6 #8-LAT-7.5 #7.5-LAT-8 #8-L
468
1216243036485664
Part Number (AV-H # W-L) Face Area (ft2)
The lightweight, easy-to-handle designreduces shipping cost and installation time.The Acousti-Tube modules are factory-assembled in a high-transmission-loss steelframe. The frame has a standard high-performance, two-coat paint system oninterior and exterior surfaces suitable foroutdoor installations.
Acousti-Tube silencers operate optimally attemperatures between –20°F and 200°F.
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GeneralInformation
Vacuum Pump LiquidSeparator-Silencers
Operation and CapacityWhen a vacuum pump starts operating atnormal atmospheric pressure, systempressure drop and power requirements are attheir maximum. As the vacuum pumpcontinues to evacuate the system, the inletpressure decreases so the system pressurelosses and power requirements decrease.The inlet volume flow in actual cubic feet perminute (ACFM) stays essentially constantthroughout system operation, but because ofdecreasing inlet pressure, the dischargevolume decreases until normal operatingconditions are reached.
Vacuum pump capacities at operatingconditions are expressed by the inletvolume flow of air and the amount that theinlet pressure has been reduced belowatmospheric pressure. Thus, vacuum pumpcapacities are stated in inlet ACFM at arelative vacuum, usually measured in inchesof mercury (Hg).
Liquid Separation PerformanceSeparator-silencers meet their rated liquidseparation efficiency at a nozzle velocity of5,500 ft/min. At lower velocities theirperformance improves. At higher velocitiestheir efficiency decreases. The nozzlevelocity is the air velocity in the inlet ordischarge nozzle and is equal to the actualvolume flow rate (ACFM) divided by thenozzle area.
Since the inlet volume flow rate is nearlyconstant during normal vacuum pumpoperation, the inlet separator-silencershould be sized so the velocity does notexceed 5,500 ft/min during all phases ofoperation (Table 1, page 6.2).
The discharge flow rate decreases fromstartup to normal operation, and in someapplications it may be acceptable to exceeda velocity of 5,500 ft/min during startup. If it is not acceptable to discharge liquidduring startup, the velocity must be reduced.
Vacuum Pump SystemsSeparator-silencers are used to removeliquid from gas flow vacuum systems usingeither liquid-sealed rotary positive blowersor liquid ring vacuum pumps (Fig. 1).
Separator-silencers may be required forboth the inlet (vacuum) and the discharge(atmospheric) of a vacuum system. Only themost stringent acoustical environments
require significant inlet silencing. An inletseparator provides corrosion protection forthe vacuum pump by removing most, if notall, of the process liquid before it enters thevacuum pump.
The vacuum pump or blower discharge isnormally extremely noisy and requires ahigh-performance separator-silencer.
liquidair
dischargeseparator-silencer
inletseparator-silencer
vacuumpump
1
2
3
4
5
6
7
Figure 1This is an example of a vacuum pumpand liquid removal system. Air and liquidenter the inlet separator-silencer duringprocessing (1). Process liquid isremoved (2), and air enters the vacuumpump (3). The pump takes in seal liquid(4). Air and seal liquid are pumped intothe discharge separator-silencer (5),which removes the liquid (6) and sendsthe air into the atmosphere (7).
If some liquid bypass is allowed duringstartup, the selection of the dischargeseparator-silencer should be based onpressure drop.
Inlet and discharge separator-silencersrequire drain systems to remove the liquid.These systems (both inlet and discharge)must provide an adequate drain sealingsystem or liquid level to offset the vacuumon the inlet side and prevent blowout on thedischarge side. See Tables 2 and 3 on thefollowing page for liquid removal data.
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10
Application GuideVacuum Pump LiquidSeparator-Silencers
Technical DetailsSeparator-silencer pressure drop depends onvelocity and pressure. In a vacuum system,pressure drop is at a maximum duringstartup. Under normal atmosphericconditions, the pressure drop at startup, foreither an inlet or discharge separator-silencer,is calculated from the following equation:
ACFM = inlet volume flow ratec = separator-silencer DP coefficient
(see Table 3)!P = pressure drop in inches of water
p = separator-silencer size (nozzle diameter) in inches
V = velocity in ft/min
If the startup pressure drop is too great, usethe flow given for a lower relative vacuum,or calculate a separator-silencer size fromthis equation:
c = separator-silencer DP coefficient!P = desired pressure drop in inches
of waterp = separator-silencer size
(nozzle diameter) in inches
ACFMp2
c477
2!P ! ! "
p ! 0.214 ACFM
V4005
2
! c ! "
#$$$$#$$
11!⁄"
22!⁄"
33!⁄"
4568
1012141618202224262830
3070
120190270370480750
1,0801,9203,0004,3005,9007,7009,700
12,00014,50017,30020,30023,50027,000
3681
144225324441576900
1,3002,3103,6005,1907,0609,220
11,67014,41017,43020,75024,35028,24032,420
45101180282406552721
1,1301,6202,8804,5106,4908,830
11,50014,60018,00021,80026,00030,50035,30040,600
60135241376541737963
1,5002,1703,8506,0208,660
11,80015,40019,50024,10029,10034,70040,70047,20054,100
75169301471678922
1,2001,8802,7104,8207,53010,80014,80019,30024,40030,10036,40043,40050,90059,00067,800
90204362565814
1,1101,4502,2603,2605,7909,050
13,00017,70023,20029,30036,20043,80052,10061,20070,90081,400
98221393614884
1,2001,5702,4503,5306,2809,800
14,10019,20025,10031,80039,30047,50056,50066,40077,00088,400
Operating Vacuum, Inches of HgNominalSize 0* 5 10 15 18 20 25**
Maximum Capacity (Inlet ACFM) for Full Liquid Separation Efficiency at Operating Vacuum
* This column is used for inlet separator-silencers and discharge separator-silencers with no liquid bypass during startup.** Capacity at operating vacuum greater than 20" Hg is limited by startup conditions.
Drain Size (O)
Models UWVS, UWSI,RWVS, RWSI
ModelsUVCS, UVRSRVCS, RVRS RWVS/UWVS 4.0 99%
RWSI/UWSI 3.0 90%RVCS/UVCS 4.0 99%RVRS/UVRS 4.5 >99%
Model Pressure DropCoefficient (C)
SeparationEfficiency
1
Maximum Liquid Flow in GPM for Various Drain Sizes*2
Pressure Drop Coefficients and Separation Efficiency3
* Values are based on gravity drain and may be larger witha positive drainage system.
c!P
11!⁄"
22!⁄"
33!⁄"
4568
10
15305075
120150200300450800
1,200
10203560
100125160260400650
1,000
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6.36.3Va
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Pum
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RWVS/UWVSSeries
Inlet Liquid Separator-Silencers
P
N
L
Z
P
O
inletflow
K
D
J
P
N
LP
O
inletflow
Z
UWVSPart
Number6U-#-AA P (nom.) O (nom.) N L K
KUWVS
Z J D Weight
The RWVS and low profile UWVS inletliquid separator-silencers provide corrosionprotection for vacuum pumps by removingmost of the process liquid before it entersthe vacuum pump. These separators arebest suited for full vacuum conditions undercritical applications which require inletsilencing. Exterior surfaces receive a shopcoat of rust inhibitive primer.
Max.ACFM
at Vacuum(Blower Inlet)
LiquidGPM**
Rated Capacity*
* Capacities for larger sizes available on request.** If maximum gas flow is not exceeded for a given separator size, liquid GPM may exceed nominal capacity shown, up to the capacity of the next larger separator.
Side View
Top View
104105106108110112114116118120122124
ModelUWVS-
4568
1012141618202224
RWVSPart
Number6R-#-AA
104105106108110112114116118120122124
ModelRWVS-
45681012141618202224
4568
1012141618202224
22!⁄"
33!⁄"
456688
1010
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
525866788597
105114135138149158
13!⁄"
14!⁄"
1821!⁄"
2631!⁄"
36!⁄"
41!⁄"
47525762
91112141518212424273033
19!⁄"
23!⁄"
30363745475068667074
5#⁄$
7!⁄$
89%⁄&
10!⁄"
13!⁄&
1618'⁄()
18*⁄()
21!⁄$
23*⁄$
26#⁄$
12%⁄&
1618222430364242485460
76144189355442630
1,0291,4011,6452,9252,3843,502
530830
1,2002,1003,3004,7006,0007,800
10,00012,00015,00018,000
355580
150200300400500600800
1,0001,200
UWVS SeriesRWVS Series
40
31.5 63 125 250 500
51015
0
20253035
Octave Band Center Frequency, Hz
Insertion Loss, dB
Typical Insertion Loss
1K 2K 4K 8K
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106.4
RWSI/UWSI SeriesInlet Liquid Separator-Silencers
The RWSI and low profile UWSI inlet liquidseparator-silencers provide corrosion protectionfor vacuum pumps by removing most of theprocess liquid before it enters the vacuumpump. These separators are best suited for fullvacuum conditions under critical applications,which require inlet silencing. The RWSI modelshave a unique profile and larger pipe sizes thanthe RWVS series. Exterior surfaces receive ashop coat of rust inhibitive primer.
* Capacities for larger sizes available on request.** If maximum gas flow is not exceeded for a given separator size, liquid GPM may exceed nominal capacity shown, up to the capacity of the next larger separator.
204205206208210212214216218220222224226228230
4568
1012141618202224262830
121618222430364242485460667278
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
263136465868788898
108120130140150160
1114!⁄&
15!⁄"
182325!⁄"
282830!⁄"
33353840!⁄"
4345!⁄"
91112141518212424273033363942
151821273440465258647177838995
3%⁄&
5%⁄()
5!!⁄()
6!!⁄()
6#⁄$
8#⁄$
111312141618202224
22!⁄"
33!⁄"
4566888
10101010
4082
108202276403708950
1,0501,3081,6192,4812,9863,5544,959
530830
1,2002,1003,3004,7006,0007,800
10,00012,00015,00018,00021,00024,00028,000
355580
150200300400500600800
1,0001,2001,4001,6001,800
UWSIPart
Number6U-#-AA P (nom.) D N L K
KUWSI
Z J O (nom.) Weight
4568
1012141618202224262830
ModelUWSI-
204205206208210212214216218220222224226228230
RWSIPart
Number6R-#-AA
4568
1012141618202224262830
ModelRWSI-
Max.ACFM
at Vacuum(Blower Inlet)
LiquidGPM**
Rated Capacity*
P
inletflow
NP
O
Z
L
K
J
D
P
inletflow
N
P
O
Z
L
K
J
D
Side View
Top View
40
31.5 63 125 250 500
51015
0
20253035
Octave Band Center Frequency, Hz
Insertion Loss, dB
Typical Insertion Loss
1K 2K 4K 8K
UWSI SeriesRWSI Series
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6.5
RVCS/UVCSSeries
Discharge Liquid Separator-Silencers
40
31.5 63 125 250 500
51015
0
20253035
Octave Band Center Frequency, Hz
Insertion Loss, dB
Typical Insertion Loss
1K 2K 4K 8K
The RVCS and low profile UVCS modelsprovide high performance liquid separationand noise attenuation. When an inletseparator is not installed, the dischargeseparator may need to be oversized.Exterior surfaces receive a shop coat ofrust inhibitive primer.
All models use a pipe thread connection (MNPT) for the liquid outlet (O).Sizes 1"–3!⁄"" are standard with male pipe thread connection (MNPT).Sizes 4"–16" are standard with 150# ANSI drilled plate flanges.
4!⁄"
4!⁄"
68
1010121216182224303642
11!⁄&
1!⁄"
22!⁄"
33!⁄"
4568
10121416
301317315302325303335304305306308310312314316
11!⁄&
1!⁄"
22!⁄"
33!⁄"
4568
10121416
22233333333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
141417222427302935425256697588
6679
10111213!⁄"
14!⁄"
1821!⁄"
2631!⁄"
36!⁄"
41!⁄"
5!⁄&
5!⁄&
678899
11121415182124
———————89
101214161619
———————33!⁄"
3!⁄"
44!⁄"
556!⁄"
8%⁄&
8101314161818!⁄"
21!⁄"
27323240!⁄"
4352
———————4!⁄&
6!⁄&
7!⁄&
9!⁄&
10!⁄&
12%⁄&
15%⁄&
18%⁄&
2%⁄+"
2!⁄()
2%⁄&
3!!⁄()
4#⁄$
4'⁄()
5!⁄"
5*⁄()
7#⁄()
8%⁄()
9!#⁄()
10!!⁄()
13*⁄()
16!⁄&
18*⁄$
111!⁄"
222!⁄"
2!⁄"
33333444
45
10152025355095
130240300445620
1,035
P (nom.)
PartNumber6U-#-AA
ModelUVCS-
D N L K E
Low Profile
K F Z R J O (nom.) Weight
301317315302325303335304305306308310312314316
PartNumber6R-#-AA
11!⁄&
1!⁄"
22!⁄"
33!⁄"
4568
10121416
ModelRVCS-
K
J
D
Pipe sizes 1"–3!⁄""
P
inletflow
P
Z
N
L
FE
P
inletflow
P
O
N
Z
L
P
inletflow
P
Z
N
L
FE
K
J
R
DO
K
D
K
J
R
DO
Pipe sizes 4"–16" Pipe sizes 1"–3!⁄"" Pipe sizes 4"–16"
Side
Vie
wTo
p Vi
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RVCS Series UVCS Series
P
inletflow
P
O
N
Z
L
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RVRS/UVRSSeriesDischarge Liquid Separator-Silencers
The RVRS and low profile UVRS modelsoffer better attenuation than the RVCS andUVCS models. For pipe sizes 1"–3", theRVRS has a side liquid outlet, while theRVCS has a vertical liquid outlet. Exteriorsurfaces receive a shop coat of rustinhibitive primer.
P
E
F
inletflow
PN
Z
L
K
J
R
D O
Pipe sizes 1"–3"
P
FE
inletflow
P
L
Z
N
P
inletflow
E
F
PN
Z
L
P
FE
inletflow
P
L
Z
N
K
J
R
DO
K
J
D
R
K
R
D O
J
Pipe sizes 3!⁄""–16" Pipe sizes 1"–3" Pipe sizes 3!⁄""–16"
All models use a pipe thread connection (MNPT) for the liquid outlet (O).Sizes 1"–3!⁄"" are standard with male pipe thread connection (MNPT).Sizes 4"–16" are standard with 150# ANSI drilled plate flanges.
4!⁄"
4!⁄"
68
1010121216182224303642
11!⁄&
1!⁄"
22!⁄"
33!⁄"
4568
10121416
401417415402425403435404405406408410412414416
11!⁄&
1!⁄"
22!⁄"
33!⁄"
4568
10121416
22223333333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
20%⁄&
20%⁄&
2532*⁄$
35!⁄"
4144%⁄$
4759!⁄"
71%⁄&
90!⁄&
103!⁄&
128!⁄"
141!⁄&
154!⁄&
6679
10111313!⁄"
14!⁄"
1821!⁄"
2631!⁄"
36!⁄"
41!⁄"
5!⁄&
5!⁄&
678899
11121415182124
3!⁄"
3!⁄"
4566789
101214161619
1!⁄&
1!⁄&
1%⁄&
233333!⁄"
3!⁄"
44!⁄"
556!⁄"
15!⁄"
14%⁄&
192526313336!⁄"
47577180
101109!⁄&
118!⁄&
1!'⁄+"
1!'⁄+"
2%⁄)&
2!%⁄()
3!%⁄()
3'⁄()
4'⁄()
4!⁄&
6!⁄&
7!⁄&
9!⁄&
10!⁄&
12%⁄&
15%⁄&
18%⁄&
2!⁄()
2!⁄()
2%⁄&
3!!⁄()
4#⁄$
4'⁄()
5!⁄"
5*⁄()
7#⁄()
8%⁄()
9!#⁄()
10!!⁄()
13*⁄()
16!⁄&
18*⁄$
111!⁄"
222!⁄"
2!⁄"
33333444
1010153040455570
140244355460
1,0921,6782,212
P (nom.)
PartNumber6U-#-AA
ModelUVRS-
D N L K E
Low Profile
K F Z R J O (nom.) Weight
401417415402425403435404405406408410412414416
PartNumber6R-#-AA
11!⁄&
1!⁄"
22!⁄"
33!⁄"
4568
10121416
ModelRVRS-
40
31.5 63 125 250 500
51015
0
20253035
Octave Band Center Frequency, Hz
Insertion Loss, dB
Typical Insertion Loss
1K 2K 4K 8K
Side
Vie
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p Vi
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RVRS Series UVRS Series
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GeneralInformation
Specialized EngineExhaust Silencers
EN Series SilencersMulti-Chamber SilencersFor the majority of engines and operatingconditions, multi-chamber type silencersprovide maximum noise attenuation withinacceptable back pressure limits. Mostnaturally aspirated and superchargedengines need this type of silencer. Manyturbocharged engines are best silenced withthis design also. Factors which influence thechoice of silencer design are explained onthe following page.
ET Series SilencersStraight-Through SilencersSome engines require very low exhaustsystem back pressures for maximumperformance. Many turbocharged enginesand some naturally aspirated engines fall intothis category. For these engines, straight-through, reactive silencers are available toprovide adequate silencing while imposingnegligible restriction on exhaust gas flow.
ES Series SilencersSpark Arresting SilencersOperating locations exist where fire hazardsand safety codes require removal of sparksfrom exhaust gases. Universal AET’s sparkarrestor silencers are engineered to performthe dual function of spark arrestment andsilencing for all internal combustionengines.
Multi-chamber exhaust silencers for mostreciprocating engines.
Straight-through exhaust silencers for engines which demand very low back pressures.
Spark arresting exhaust silencers for engines operating in high potential fire areas.
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SizingInformationEngine Exhaust Silencers
Choosing the correct exhaust silencer for agiven engine is an important although notdifficult task. First of all, a degree ofsilencing is chosen that will satisfy thenoise requirements unique to each engineand location. Secondly, the silencer size isselected to accommodate the specifiedvolume of exhaust flow without imposingexcessive back pressure.
Selection of Silencer Type (Grade)Each silencer group described on pages7.3–7.6 has a number of a series withdifferent noise attenuation characteristics.
The series letter designation (e.g., EN2)indicates in relative terms the degree ofnoise attenuation; the higher the number,the greater the attenuation.
2 “Industrial” or “Commercial” grade
3 “Residential” grade
4 “Critical” grade
5 “Hospital” grade
The attenuation curves next to the tables oneach page indicate the attenuation in dB byoctave bands.
These curves are based upon “typical”applications. They will not necessarily definethe precise insertion loss for any specificapplication since the insertion loss achievedmay be influenced substantially by manyfactors, including engine size, type, speed,and unsilenced noise levels and frequencydistribution.
Selection of Silencer SizeThe open flow area within the silencershould be large enough to accommodatethe maximum possible exhaust flow withoutexceeding the engine manufacturer’smaximum allowable back pressure.Improperly sized silencers may cause lossof power or damage to the engine.
Data required:engine exhaust flow (CFM)exhaust temperature (˚F)maximum back pressure (inches of water)
The following formulas enable the correctsilencer size to be quickly determined.
1 Calculate gas velocity.
V = gas velocity!P = back pressure, inches of water
c = silencer pressure drop coefficient (Table 1)
T = exhaust gas temperature, ˚F
Note: Velocity should not exceed15,000 ft/min regardless of the allowable back pressure.
2 Calculate required flow area.
3 From Table 2, select the silencer sizewhich has a flow area equal to orgreater than that calculated, the actualback pressure can be calculated asfollows:
Universal AET’s engine exhaust silencers arehigh quality, fully welded, reactive silencersdesigned to reduce exhaust noise on alltypes of internal combustion engines. Eachengine and each operating location requiresa unique combination of silencer properties.
For this reason many different silencermodels are cataloged to cover mostsilencing problems. In cases wherestandard silencers will not meet a particularspec, these custom silencers will satisfy theapplication need.
!P
V ! 4005 c ! "530T " 460
! "!P = c Vactual4005
2
! "530T " 460
EN 2, 3, 4EN5 (1"–10")EN5 (12"")ET2ET4ES2, 3
4.24.25.30.51.04.2
Silencer Model Pressure Drop Coeff. (C)
CFMsilencer flow area
V actual !
CFMV
Flow Area Required (ft2) !
Pressure Drop Coefficients1
0.00550.0120.0220.0340.0490.0670.0870.1360.1960.3490.550.791.071.41.82.22.63.13.74.34.95.66.37.17.98.79.6
10.611.512.615.919.6
11!⁄"
22!⁄"
33!⁄"
4568
10121416182022242628303234363840424446485460
Flow Area(ft2)
Diameter(in.)
Flow Area/Size2
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4568
1012141618202224262830
Size
19-104-AA19-105-AA19-106-AA19-108-AA19-110-AA19-112-AA19-114-AA19-116-AA19-118-AA19-120-AA19-122-AA19-124-AA19-126-AA19-128-AA19-130-AA
PartNumber
121416202428363642484854606060
D
40465961747577
113127130142156169181194
L
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
N
34405354676870
106120121133147160172185
H
9101113!⁄"
15!⁄"
17!⁄"
21!⁄"
21!⁄"
24!⁄"
28!⁄"
28!⁄"
31!⁄"
34!⁄"
34!⁄"
37!⁄"
K
66!⁄"
7!⁄"
91112!⁄"
14!⁄"
15!⁄"
17!⁄"
192022!⁄"
24!⁄"
25!⁄"
27
Min.
151925253030304050556070808090
Max.
Y
6070
130190280420650900
1,4001,6001,8002,5003,2003,4004,700
Weight
EN2
EN SeriesMulti-Chamber Silencers
DrainP
N
N
L H D
DrainK
Y
EN2, EN3, and EN4 Series Engine ExhaustSilencers are heavy-duty, fully welded unitsconstructed of carbon steel sheet and plate.Each silencer is equipped with flangedconnections drilled to match 125/150 lbANSI specifications. Exterior surfacesreceive a coat of heat resistant paint.
For EN5 Series, 1"–3!⁄"" are sizes equippedwith standard male pipe thread connections.Sizes 4" and larger have flangedconnections drilled to match 125/150 lbANSI specifications.
The addition of “Y” in the model designationindicates a side inlet. Both configurationsare fundamentally alike and performance isidentical.
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
EN2, EN3, EN4, EN5 Series
End-In, End-Out Design
Side-In, End-Out Design
EN2Y, EN3Y, EN4Y, EN5Y Series
6" pipe size12" pipe size24" pipe size
6" pipe size12" pipe size24" pipe size
40
50
63 125 250 500 1K 2K 4K 8K
30
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
20
10
0
40
50
63 125 250 500 1K 2K 4K 8K
20
30
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
10
0
4568
1012141618202224262830
Size
20-104-AA20-105-AA20-106-AA20-108-AA20-110-AA20-112-AA20-114-AA20-116-AA20-118-AA20-120-AA20-122-AA20-124-AA20-126-AA20-128-AA20-130-AA
PartNumber
141618222630364248485460667272
D
4759607386
111113127129142156181195209220
L
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
N
4153546679
104106120122133147172186200211
H
10111214!⁄"
16!⁄"
18!⁄"
21!⁄"
24!⁄"
27!⁄"
28!⁄"
31!⁄"
34!⁄"
37!⁄"
40!⁄"
40!⁄"
K
6789!⁄"
1112!⁄"
14!⁄"
16!⁄"
181921!⁄"
23!⁄"
252728
Min.
20242432365252626262728292
103103
Max.
Y
70130150250390700900
1,2001,4501,6002,3003,0504,4005,0005,400
Weight
EN3
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10
EN SeriesMulti-Chamber Silencers
22-101-AA22-115-AA22-102-AA22-125-AA22-103-AA22-135-AA22-104-AA22-105-AA22-106-AA22-108-AA22-110-AA22-112-AA22-114-AA22-116-AA22-118-AA22-120-AA22-122-AA22-124-AA22-126-AA22-128-AA22-130-AA
68
10121214161822263036364248485460667272
25!⁄"
2734404659717285
111136138168193213227240278292329352
3333333333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
19!⁄"
2128344053656679
104129131161186206218231269283320343
67899
1011121416!⁄"
18!⁄"
21!⁄"
21!⁄"
24!⁄"
27!⁄"
28!⁄"
31!⁄"
34!⁄"
37!⁄"
40!⁄"
40!⁄"
2!⁄"
3!⁄"
4!⁄"
555!⁄"
689
1011!⁄"
1414!⁄"
16!⁄"
181921!⁄"
23!⁄"
252728
99
131618243333405065466475858596
106115128139
102030506090
110160300480800
1,0501,2001,7502,7503,0503,5505,1006,5007,6008,300
PartNumber
11!⁄"
22!⁄"
33!⁄"
4568
1012141618202224262830
Size D L N H K Min.
Y
Max. Weight
EN5
21-104-AA21-105-AA21-106-AA21-108-AA21-110-AA21-112-AA21-114-AA21-116-AA21-118-AA21-120-AA21-122-AA21-124-AA21-126-AA21-128-AA21-130-AA
PartNumber
4568
1012141618202224262830
Size
141618242836364248485460667272
D
59717293
111114125139176190192217231257280
L
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
N
53656686
104107118132169181183208222248271
H
10111215!⁄"
17!⁄"
21!⁄"
21!⁄"
24!⁄"
27!⁄"
28!⁄"
31!⁄"
34!⁄"
37!⁄"
40!⁄"
40!⁄"
K
6789!⁄"
11!⁄"
1414!⁄"
16!⁄"
181921!⁄"
23!⁄"
252728
Min.
Y
2633334252526363869696
107117128139
Max.
85120170400550950
1,1001,3502,2002,5003,0003,8005,8506,7507,500
Weight
EN4
6" pipe size12" pipe size24" pipe size
40
50
63 125 250 500 1K 2K 4K 8K
30
Octave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
20
10
0
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
20
10
0
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
6" pipe size12" pipe size24" pipe size
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29-104-AA29-105-AA29-106-AA29-108-AA29-110-AA29-112-AA29-114-AA29-116-AA29-118-AA29-120-AA29-122-AA29-124-AA29-126-AA29-128-AA29-130-AA
Part Number
4568
1012141618202224262830
Size
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
N
121416202428363642484854606066
D
40465961747577
113127130142156169181194
L
34405354676870
106120121133147160172185
H
5080
150230300420650900
1,3001,5001,8502,5503,2003,4004,650
Weight
ET2
30-104-AA30-105-AA30-106-AA30-108-AA30-110-AA30-112-AA30-114-AA30-116-AA30-118-AA30-120-AA30-122-AA30-124-AA30-126-AA30-128-AA30-130-AA
Part Number
4568
1012141618202224262830
Size
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
N
141618242836364248485460667272
D
59717293
111114125139176190192217231257280
L
53656686
104107118132169181183208222248271
H
80110160400550950
1,1001,4002,3002,5002,8004,0505,5006,5007,100
Weight
ET4
ET SeriesStraight-Through Silencers
ET2 and ET4 Series Engine ExhaustSilencers are heavy-duty, fully welded unitsconstructed of carbon steel sheet and plate.Each silencer is equipped with flangedconnections drilled to match 125/150 lbANSI specifications. Exterior surfacesreceive a coat of heat resistant paint.
Due to low back pressure requirements, noside inlet configuration is cataloged. Insome special cases side inlets may bedesigned on application.
DrainP
N
N
L H D
ET2, ET4 Series
6" pipe size12" pipe size24" pipe size
6" pipe size12" pipe size24" pipe size
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
20
10
0
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
20
10
0
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
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ES SeriesSpark Arrestor Silencers
ES2 and ES3 Series spark arrestingsilencers are heavy-duty, fully welded unitsconstructed of carbon steel sheet and plate.Each silencer is equipped with flangedconnections drilled to match 125/150 lbANSI specifications. Exterior surfacesreceive a coat of heat resistant paint.
Large capacity spark traps are provided oneach unit which can be easily opened forperiodic cleaning. Side inlet configurationswill be designed on application.
ES2 and ES3 Series may be mountedvertically or horizontally.
25-104-AA25-105-AA25-106-AA25-108-AA25-110-AA25-112-AA25-114-AA25-116-AA25-118-AA25-120-AA25-122-AA25-124-AA25-126-AA25-128-AA25-130-AA
Part Number
4568
1012141618202224262830
Size
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
N
121416202428363642484854606066
D
40465961747577
113127130142156169181194
L
34405354676870
106120121133147160172185
H
5070
110170290430600850
1,3501,5501,7002,4003,0503,2004,600
Weight
ES2
26-104-AA26-105-AA26-106-AA26-108-AA26-110-AA26-112-AA26-114-AA26-116-AA26-118-AA26-120-AA26-122-AA26-124-AA26-126-AA26-128-AA26-130-AA
Part Number
4568
1012141618202224262830
Size
3333!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
N
141618222630364248485460667272
D
4759607386
111113127129142156181195209220
L
4153546679
104106120122133147172186200211
H
70130160240350600950
1,2001,5001,6502,3503,1004,5005,1005,600
Weight
ES3
DrainP
N
N
L H D
ES2, ES3 Series
6" pipe size12" pipe size24" pipe size
6" pipe size12" pipe size24" pipe size
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
20
10
0
40
50
63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz
Attenuation, dB
Typical Attenuation Curve
30
20
10
0
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.
End-In, End-Out Design
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10
AccessoriesEngine Exhaust Silencers
181818181818181818 181818181818
4679
101214172436626990
110130
L(Nominal)
Flex Connectors Companion Flange Set
11!⁄"
22!⁄"
33!⁄"
4568
1012141618
P(Size) Weight
Flex Connectors are recommended for engineexhaust applications to compensate forthermal expansion and vibration (but notmisalignment). Flexible material is type 321stainless steel, suitable for temperatures to1200˚F. Flanges and pipe fittings are mildsteel. Sizes 1"–3!⁄"" are standard with maleNPT, larger sizes are equipped with flangesdrilled to 125/150 lb ANSI.
80-106180-106280-106380-106480-106580-106680-106780-106880-103480-103580-103680-103780-103880-103980-104080-104180-1042
11!⁄"
22!⁄"
33!⁄"
4568
10121416182022
!⁄"
!⁄"
1111!⁄"
225!⁄"
811142226303436
Part Number P(Fits Pipe Size) Weight
Raincaps
Raincaps prevent rain, snow, and dust fromentering the exhaust system. Non-corrosivebushings insure positive opening. All sizes arestandard in mild steel with high temperaturepaint. Sizes 8"–22" are also available instainless steel—quoted by request andequipped with adjustable counterweights.
Each Companion Flange Set includes onemild steel welding flange drilled to match125/150 lb ANSI, one gasket and one set ofbolts and nuts. Cast iron threaded flanges andstainless steel flanges are available and will bequoted on request. Single and doublereducing flanges are also available.
45681012141618202224262830
7101316303545556590105115130150160
Pipe Size Weight
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AccessoriesEngine Exhaust Silencers
Mounting AttachmentsMounting Attachments are welded in place on the silencer shell to facilitateinstallation. Standard and variabledimensions are available.
Inspection Openings have removable coversto provide access to silencer internals forinspection or cleaning. Usually one openingper silencer chamber is recommended.
80-101980-102080-102180-1025
3 # 44 # 66 # 88 # 10
46
1220
PartInspection
Opening Size(Oval)
Weight
Inspection Openings
Explosion Relief Covers are designed to openat 5 PSI to protect the silencer shell againstrupture in case of backfire or explosion ofresidual gases within exhaust system. Oneunit in first chamber of silencer is adequate.
80-105980-106080-1053
121620
80110140
Part P-ReliefCover Size Weight
Explosion Relief Cover
These filters and filter-silencers are availablewith a variety of filter panels, each with itsown restriction characteristics. To reflect thatfact, the total pressure drop for a specific filterapplication is the sum of two pressure dropvalues:
1 The first value is the restriction that canbe attributed to the filter housing withoutfilter panels. This value is found in thegraphs at right.
2 The second value is the restrictionthrough the filter panel media. Thesevalues are taken from the table below.
The pressure drop values for the filter panelsare listed in the table as pressure drop ininches of water gauge at various flow ratesin CFM. The housing pressure drop isshown in graphical form as a function of airflow in CFM versus pressure drop in inchesof water gauge.
To avoid confusion, pressure drop values inthe graphs include pipe entrance pressuredrops from the atmospheric end of the inletpipe. These drops are significant,contributing as much as 75% of the totalpressure drop, and should not be attributedto the filter. Adding the filter transfers thesepressure losses to the interior of the filterhousing. A pressure drop measurement atthe pressure tap on the filter outlet reflectsthe total:
Pipe entrance lossVelocity pressureHousing restriction
Application GuideFilters and Filter-Silencers
500600700800900
1,0001,2501,500
0.010.020.030.030.040.050.080.12
W-2
0.060.080.110.140.170.210.310.44
DD-2
0.090.130.160.210.250.300.440.59
P-11
0.070.100.140.170.210.260.390.56
W-2and DD-2
0.100.150.190.240.290.350.520.71
W-2and P-11
0.800.961.121.281.441.602.002.40
P-8and P-12F
0.280.350.420.490.560.640.831.04
0.290.370.450.520.600.690.911.16
W-2and P-5
0.340.430.530.630.730.851.141.48
DD-2and P-5P-5CFM
per filter
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Pressure Drop Values for 20" ! 25" Panel Filters, in Water Gauge
0.1
0.2
0.5
1.0
2.03.0
5.0
10.0Pressure Drop, in Inches Water Gauge
500 1K 2K 3K 5K 10K 20K 50K 100KFlow Rate, CFM
Pressure Drop Curves for Filter HousingsFH, FSH, BFH, and FASH Series
10"8" 12" 14" 18" 20" 24" 30" 36" 42" 48"16"
6" outlet nozzle size
0.1
0.2
0.5
1.0
2.03.0
5.0
10.0Pressure Drop, in Inches Water Gauge
500 1K 2K 3K 5K 10K 20K 50K 100KFlow Rate, CFM
Pressure Drop Curves for Filter HousingsFH, FSH, BFH, and FASH Series
10"8" 12" 14" 18" 20" 24" 30" 36" 42" 48"16"
6" outlet nozzle size
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FH SeriesFilter
FSH Series Filter-Silencer
The FH and FSH series use standard panelfilters, which are available in a variety oftypes and efficiencies. The supports for thefilter frames inside the housingsaccommodate conventional 2" deep single-panel filters or, for critical service, twosingle-panel filters staged in series. In thecase of dual-stage systems, use a high-efficiency final filter and a less efficientprimary filter. The FSH series has anintegrated silencing section for applicationsthat require moderate noise reduction.
For centrifugal compressors, blowers,engines, and gas turbines. For reciprocatingcompressors, ask Universal for recommendations.
FH-6-2FH-8-2FH-10-2FH-10-4FH-12-4FH-14-4FH-14-8FH-16-8FH-18-8FH-20-8FH-20-12FH-24-12FH-24-16FH-30-16FH-30-24FH-36-24FH-42-36FH-48-48
Model
FH Filter
36-306-AAL36-308-AAL36-310-AAL36-510-AAL36-412-AAL36-314-AAL36-514-AAL36-416-AAL36-418-AAL36-320-AAL36-520-AAL36-424-AAL36-524-AAL36-330-AAL36-530-AAL36-336-AAL36-342-AAL36-348-AAL
Part Number
FSH-6-2FSH-8-2FSH-10-2FSH-10-4FSH-12-4FSH-14-4FSH-14-8FSH-16-8FSH-18-8FSH-20-8FSH-20-12FSH-24-12FSH-24-16FSH-30-16FSH-30-24FSH-36-24FSH-42-36FSH-48-48
Model
FSH Filter Silencer
37-306-AAL37-308-AAL37-310-AAL37-510-AAL37-412-AAL37-314-AAL37-514-AAL37-416-AAL37-418-AAL37-320-AAL37-520-AAL37-424-AAL37-524-AAL37-330-AAL37-530-AAL37-336-AAL37-342-AAL37-348-AAL
AAABBBCCCCDDCCDDDD
Part NumberConfig.
1,0001,7502,7502,7504,0005,4005,4007,0008,900
11,00011,00016,00016,00020,50020,50035,50048,00063,000
Cap.CFM
68
10101214141618202024243030364248
A(nom.)
25.5025.5025.5025.5025.5025.5040.7540.7540.7540.7561.0061.0050.7550.7576.0076.0076.00101.38
B
23.2523.2523.2532.0032.0032.0042.0042.0042.0042.0050.0050.0056.0056.0056.0056.0081.0081.00
C
23.2523.2523.2532.0032.0032.0042.0042.0042.0042.0050.0050.0056.0056.0056.0056.0081.0081.00
D
34.5034.5034.5038.5038.5038.5047.8847.8847.8847.8855.8855.8862.5062.5062.5062.5087.0087.00
E
5.005.005.005.005.005.005.005.005.005.005.005.005.005.005.005.006.006.00
F
115125130170175180340350350365600610695795
1,0351,0852,4502,870
Weight
FH
145150160200210220405420430440725765855960
1,3401,6702,9003,565
FSH
Number andSize of Filter
Openings
2, 20!25!42, 20!25!42, 20!25!44, 20!25!44, 20!25!44, 20!25!48, 20!25!48, 20!25!48, 20!25!48, 20!25!4
12, 20!25!412, 20!25!416, 20!25!416, 20!25!424, 20!25!424, 20!25!436, 20!25!448, 20!25!4
Noise Attenuation
Nominal capacity is based on an exit velocity of approximately 5,000 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity.4"-deep filter frames will hold single or dual elements. Weights include the weights of weather louvers only. Refer to page 8.8 for filter element details.
23458
131413
63125250500
1,0002,0004,0008,000
Attenuation, dB Octave Band CenterFrequency, Hz
All units are fabricated of steel sheet andplate, welded throughout to provide arugged, long-lasting, trouble-free airfiltering component. All models areequipped with a pressure tap and flangesdrilled to match 125/150-lb ANSIspecifications. Inside and outside housingsurfaces are primed and given a finish coatof enamel paint. Suitable mounting legsmay be fitted in the field or will be quotedupon application.
All housings come with low-profile, UV-stabilized plastic weather louvers.
B
DE
C
AF
Removable Weather Louver
B
F
C
DE
A Removable Weather Louver
B
DE
AF
C
Removable Weather Louver
B
F
C
DE
A Removable Weather Louver
A B C D
Part Numbers (Standard Units with Louvers)
Rota
ry P
ositi
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Blow
er S
ilenc
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8.3
Filte
rs a
nd
Filte
r-Sile
ncer
s1
23
45
67
109
8.3
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FRH SeriesFilter
FCRH Series Filter-Silencer
These products are similar to the FH andFSH series, except that the FRH and FCRHseries are two-stage filters. The secondstage consists of a battery of 12 cartridgefilters for each 20" ! 25" ! 2" prefilter.
The high-efficiency P-5 cartridge filters havethreaded ends that screw into individualreceptacles. As each P-5 filter is removedand replaced, less than 4 in2 is exposed tothe flow of unfiltered air, so “hot swap”changeouts (while the system is inoperation) are an option for these units.
For centrifugal compressors, blowers,engines, and gas turbines. For reciprocatingcompressors, ask Universal AETfor recommendations.
FRH-8-2FRH-10-2FRH-10-4FRH-12-4FRH-14-4FRH-14-8FRH-16-8FRH-18-8FRH-20-8FRH-20-12FRH-24-12FRH-24-16FRH-30-16FRH-30-24FRH-36-24
Model
FRH Filter
38-308-AAL38-310-AAL38-510-AAL38-412-AAL38-314-AAL38-514-AAL38-416-AAL38-418-AAL38-320-AAL38-520-AAL38-424-AAL38-524-AAL38-330-AAL38-530-AAL38-336-AAL
Part Number
FCRH-8-2FCRH-10-2FCRH-10-4FCRH-12-4FCRH-14-4FCRH-14-8FCRH-16-8FCRH-18-8FCRH-20-8FCRH-20-12FCRH-24-12FCRH-24-16FCRH-30-16FCRH-30-24FCRH-36-24
Model
FCRH Filter Silencer
39-308-AAL39-310-AAL39-510-AAL39-412-AAL39-314-AAL39-514-AAL39-416-AAL39-418-AAL39-320-AAL39-520-AAL39-424-AAL39-524-AAL39-330-AAL39-530-AAL39-336-AAL
AABBBCCCCDDCCDD
Part NumberConfig.
1,7502,7502,7504,0005,4005,4007,0008,90011,00011,00016,00016,00020,50020,50035,500
Cap.CFM
81010121414161820202424303036
A(nom.)
25.5025.5025.5025.5025.5040.7540.7540.7540.7561.0061.0050.7550.7576.0076.00
B
22.2522.2542.0042.0042.0052.0052.0052.0052.0060.0060.0066.0066.0072.0072.00
C
40.0040.0042.0042.0042.0052.0052.0052.0052.0060.0060.0066.0066.0072.0072.00
D
46.5046.5048.5048.5048.5048.5057.8857.8857.8865.8865.8872.5072.5078.5078.50
E
3.503.503.503.503.503.504.504.504.504.504.504.504.504.504.50
F
205210375380395655665665675
1,2651,3151,4401,4902,1302,230
Weight
FRH FCRH
245255385435440735745755765
1,5151,5651,6401,6902,4802,630
2, 20!25!42, 20!25!44, 20!25!44, 20!25!44, 20!25!48, 20!25!48, 20!25!48, 20!25!48, 20!25!4
12, 20!25!412, 20!25!416, 20!25!416, 20!25!424, 20!25!424, 20!25!4
Number andSize of Filter
Openings
242448484896969696
144144192192288288
FinalFilters
Noise Attenuation
Nominal capacity is based on an exit velocity of approximately 5,000 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity.2"-deep filter frames will hold single or dual elements. Refer to page 8.8 for filter element details.
23458
131413
63125250500
1,0002,0004,0008,000
Attenuation, dB Octave Band CenterFrequency, Hz
Usually, a moderately efficient filter panel isused as the first-stage element. The FCRHseries has an integrated silencing sectionthat provides moderate noise reduction.
All units are fabricated of steel sheet andplate, welded throughout to provide arugged, long-lasting, trouble-free air filteringcomponent. All models are equipped with apressure tap and flange drilled to match125/150-lb ANSI specifications. Inside andoutside surfaces are primed and given afinish coat of enamel paint. All housingscome with low-profile, UV-stabilized high-density polyethylene weather louvers.
B
DE
C
AF
Removable Weather Louver
B
F
C
DE
A Removable Weather Louver
B
DE
AF
C
Removable Weather Louver
B
F
C
DE
A Removable Weather Louver
A B C D
Part Numbers (Standard Units with Louvers)
Rota
ry P
ositi
ve
Blow
er S
ilenc
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8.4Fi
lters
and
Fi
lter-S
ilenc
ers
12
34
56
710
98.4
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BFH Series Filter
BFH-4-1BFH-5-1BFH-6-1BFH-8-2BFH-10-2BFH-10-4BFH-12-4BFH-14-4
Filter
35-304-AAL35-305-AAL35-306-AAL35-308-AAL35-310-AAL35-410-AAL35-412-AAL35-314-AAL
Part Number
AAABBCCC
Config.
450700
1,0001,7502,7502,7504,0005,000
CapacityCFM
4568
10101214
A
20!⁄"
20!⁄"
20!⁄"
25!⁄"
25!⁄"
25!⁄"
25!⁄"
25!⁄"
B
26!⁄#
26!⁄#
26!⁄#
21!⁄#
21!⁄#
27!⁄#
27!⁄#
27!⁄#
C
151617202327!⁄#
27!⁄#
27!⁄#
D
18192026!⁄"
29!⁄"
33!⁄"
33!⁄"
33!⁄"
E
4550557070858585
Weight
1, 20!25!41, 20!25!41, 20!25!42, 20!25!42, 20!25!44, 20!25!44, 20!25!44, 20!25!4
Number andSize of Filter
Openings
The Universal AET BFH Series air filter is acompact, inexpensive unit designed forstandard panel filters, which are available in avariety of types and efficiencies. Where noiseis a consideration, the BFH is used in serieswith a separate inlet silencer. The filterframes accommodate conventional 2"-deepsingle-panel filter elements, single stage only.
For centrifugal compressors, blowers,engines, and gas turbines. For reciprocatingcompressors, ask Universal AETfor recommendations.
Nominal capacity is based on exit velocity of approximately 5,000 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity. Weights do not includethe weight of the filter elements. 2"-deep filter frames will hold a single filter element. Refer to page 8.8 for filter element details.
B
Removable Weatherhood
C
D
A Nom.Pipe Size
E
B
C
Removable Weatherhood
A Nom.Pipe Size
A Nom.Pipe Size
B
Removable Weatherhood
DE
CE
These units are fabricated of steel sheet andplate, welded throughout, to provide arugged, long-lasting, trouble-free airfiltering component. The filter is equippedwith removable weather louvers. Forconvenience of mounting, the bottom platecontains an opening and bolting pattern thatmatches 125/150 lb ANSI flangespecifications. Inside and outside housingsurfaces are primed and given a finish coatof enamel paint.
A B C
Part Numbers (Standard Units with Louvers)
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ry P
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8.5
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45
67
109
8.5
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RF Series Filter-Silencer
The RF Series Filter-Silencer is a high-degreereactive (chamber) silencer of very ruggedconstruction, which is typically required forlarge, slow-speed reciprocating or positivedisplacement machinery, where broadbandnoise attenuation and inherent vibration-resistant structural strength is required. Wiremesh panel filters are standard in one of thefour configurations shown below.
Noise Attenuation Part Numbers (Standard with Wire Mesh Elements)
2829292826252423
63125250500
1,0002,0004,0008,000
Attenuation, dB Octave Band CenterFrequency, Hz
RF units are fabricated of steel sheet andplate, welded throughout. Filter panels areserviced and replaced through hingedaccess doors. Flanged connections aredrilled to match 125/150# ANSUspecifications. Inside and outside surfacesare given a shop coat of rust inhibitiveprimer. The exterior may be finish-painted inthe field if desirable.
C
B
D
Filter AccessDoors
125#/150#ANSI FlangeDrilling
Drain
AE
E A
C
B
D
Filter Access Doors
125#/150# ANSI FlangeDrilling
Drain
F
E A
Y
Y
C
B
D
Filter AccessDoors
125#/150#ANSI FlangeDrilling
Drain
AE
C
B
Filter Access Doors
125#/150# ANSI FlangeDrilling
Drain
F
Y
Y
RF Series RFY Series RFS Series RFSY Series
RF-6RF-8RF-10RF-12RF-14RF-16RF-18RF-20RF-22RF-24RF-26RF-28RF-30
RF Series
Model
42-106-AA42-108-AA42-110-AA42-112-AA42-114-AA42-116-AA42-118-AA42-120-AA42-122-AA42-124-AA42-126-AA42-128-AA42-130-AA
Part Number
RFY-6RFY-8RFY-10RFY-12RFY-14RFY-16RFY-18RFY-20RFY-22RFY-24RFY-26RFY-28RFY-30
RFY Series
Model
42-206-AA42-208-AA42-210-AA42-212-AA42-214-AA42-216-AA42-218-AA42-220-AA42-222-AA42-224-AA42-226-AA42-228-AA42-230-AA
Part Number
RFS-6RFS-8RFS-10RFS-12RFS-14RFS-16RFS-18RFS-20RFS-22RFS-24RFS-26RFS-28RFS-30
RFS Series
Model
43-106-AA43-108-AA43-110-AA43-112-AA43-114-AA43-116-AA43-118-AA43-120-AA43-122-AA43-124-AA43-126-AA43-128-AA43-130-AA
Part Number
RF/RFY/RFS-6RF/RFY/RFS-8RF/RFY/RFS-10RF/RFY/RFS-12RF/RFY/RFS-14RF/RFY/RFS-16RF/RFY/RFS-18RF/RFY/RFS-20RF/RFY/RFS-22RF/RFY/RFS-24RF/RFY/RFS-26RF/RFY/RFS-28RF/RFY/RFS-30
Model
1,0501,8752,9504,2505,6007,5009,500
11,50014,00016,50020,00023,00026,000
Nom.Cap.CFM
68
1012141618202224262830
A
24243036364242484854546066
B
79!⁄#
79!⁄#
105125124!⁄#
143167!⁄"
181198!⁄"
218!⁄"
231250269!⁄"
C
RF
79!⁄"
79!⁄"
105!⁄"
125!⁄"
125!⁄"
144!⁄"
168!⁄"
182!⁄"
200220232!⁄"
151!⁄"
271!⁄"
RFY
91$⁄#
91$⁄#
91!⁄"
137!⁄"
143!⁄"
163192!⁄"
206!⁄"
230!⁄"
250!⁄"
268!⁄"
288307!⁄"
RFS
1313137
212126!⁄#
27!⁄#
27!⁄#
———
27!⁄#
D
RFSY
86!⁄#
86!⁄#
112132131!⁄"
150174!⁄#
190207!⁄"
227!⁄"
240259278!⁄"
RF
8383
109129129148172187204!⁄"
224!⁄"
237256276
RFY
95!⁄#
95!⁄#
121141147166!⁄"
196211235255273292!⁄"
312
RFS
15!⁄"
15!⁄"
18!⁄"
21!⁄"
21!⁄"
24!⁄"
28!⁄"
28!⁄"
31!⁄"
31!⁄"
34!⁄"
37!⁄"
115
F
991113141617192022242627
Y
Min. Min.
2323
34!⁄"
40394556566066727877
1, 20!25!22, 20!25!22, 20!25!24, 20!25!24, 20!25!26, 20!25!28, 20!25!28, 20!25!2
12, 20!25!212, 20!25!212, 20!25!218, 20!25!218, 20!25!2
Number and Size of Filter Openings
400510850
1,2201,2801,9502,1702,9003,0903,9004,1605,3605,460
Weight
RF, RFY RFS
450530920
1,2601,3402,0702,2903,0003,3604,1904,4705,7606,970
For intermediate and large positivedisplacement blowers, reciprocating
engines, and compressors.
Nominal capacity is based on exit velocity of approximately 5,400 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity.
Refer to page 8.8 for filter element details.
Rota
ry P
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ve
Blow
er S
ilenc
ers
8.6Fi
lters
and
Fi
lter-S
ilenc
ers
12
34
56
710
98.6
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FASH SeriesAbsolute Filter
The FASH Series Absolute Filter-Silencerrepresents the ultimate high-efficiency airfiltration for industrial applications. The unituses first- and second-stage elements,having a combined depth of 20", to provideexceptional efficiency on ultra-fineparticulates and a large surface area for lowflow resistance and high dirt-retentioncapacity. Filtration efficiency is 99.97% onparticles 0.3 microns.
Instead of a conventional gasket seal, theFASH utilizes a unique fluid seal for the finalfilter. A channel on the downstream side of theP-12F final filter holds a stable silicon gel fluid.The frame has a projecting tongue which isimmersed in the fluid. The result is a 100%bypass-free system.
For economy, the filters are staged, so thatthe less expensive pre-filter “roughing” padand primary filter can be changed morefrequently than the final filter. Under typicalconditions, the pre-filter will requirereplacement about once a year, while thefinal filter may provide two to three years of service. Specification details for the P-8pre-filter and P-12F final filter can be foundon page 8.7.
FASH-10-4FASH-12-4FASH-14-4FASH-14-8FASH-16-8FASH-18-8FASH-20-8FASH-20-12FASH-24-12FASH-24-16FASH-30-16FASH-30-24FASH-36-24FASH-42-36FASH-48-48
Model
40-510-AA40-412-AA40-314-AA40-514-AA40-416-AA40-418-AA40-320-AA40-520-AA40-424-AA40-524-AA40-330-AA40-530-AA40-336-AA40-342-AA40-348-AA
Part Number
2,7504,0005,4005,4007,0008,900
11,00011,00016,00016,00020,50020,50035,50048,00063,000
Nom. Cap.CFM
101214141618202024243030364248
A
25!⁄"
25!⁄"
25!⁄"
40$⁄#
40$⁄#
40$⁄#
40$⁄#
616150$⁄#
50$⁄#
767676
101!⁄#
B
323232424242425050525262627278
C
323232424242425050525262627278
D
5555556161616169697575858595
101
E
3!⁄"
3!⁄"
3!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
4!⁄"
66
F
225240245465475485495810850850955
1,5351,8652,3203,750
Weight
224448888
121216162424
Number ofElements
Noise Attenuation
23458
131413
63125250500
1,0002,0004,0008,000
Attenuation, dB Octave Band CenterFrequency, Hz
The FASH features an integral silencingsection for a moderate degree of noiseattenuation. The unit is constructed ofheavy-duty steel sheet and plate, weldedthroughout, making it a rugged, long-lasting,trouble-free air filtering component.
All models are equipped with removableweatherhoods, pressure tap, and flangesdrilled to match 125/150 lb ANSIspecifications. Inside and outside surfacesare primed and given a finish coat of enamel paint.
Suitable mounting legs may be fitted in thefield, or quoted upon application.
For centrifugal compressors,blowers, and gas turbines.
Nominal capacity is based on exit velocity of approximately 5,000 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity. 4" deep filter frames willhold single elements or dual elements. Weights do not include the weight of the filter elements. Weight is measured with steel weatherhoods. Louvered weatherhoods reduceweight by 7 lb per filter opening.
B
F
D C
E
125#/150#ANSI FlangeDrilling
A
Rota
ry P
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Blow
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8.7
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45
67
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P-8 SeriesPrefilter
P-12F Series Final Filter
For New Units—MeasuringPressure DropWhen new filters or filter-silencers areinstalled, make the following two pressuredrop measurements and record the resultsfor future reference:
1 Measure the pressure drop with all filters installed.
2 Measure the pressure drop with the P-8pre-filters removed, but the P-12F finalfilters installed; this gives the pressuredrop across the final filters.
3 Subtract the second value from the first to find the pressure drop across the pre-filters.
Polyester Pad ReplacementReplace the polyester pad when visibly dirty.
Filter ReplacementAfter the units have been in service and thefilters are loaded, determine whether thefilters need to be replaced as follows:
1 Measure the pressure drop with all filtersinstalled and subtract the valuemeasured at installation, when the filterswere clean, to find the pressure dropacross both loaded filters.
2 Measure the pressure drop with the P-8pre-filters removed, but with the P-12Ffinal filters installed; subtract the valuemeasured at installation, when the finalfilters were clean; if the difference ismore than 2", replace the final filters.
3 Subtract the second value from the firstto find the pressure drop across the pre-filters. If the difference is more than 2",replace the final filters.
* The polyester pad (part number 81-0400) is a 2" thick “roughing” filter that fits on the face of the P-8 prefilter. It may be purchased separately in cartons of 12 and shouldbe replaced when it is visibly dirty. Follow the service instructions for replacement.
Seal
Filter Media
Sponge NeopreneGasket
Waterproof Glass Waterproof Glass
Separators Aluminum Aluminum
Frame 16-Gauge Galvanized Steel
16-Gauge Galvanized Steel
ConstructionPleated Media
over CorrugatedSeparators
Pleated Mediaover Corrugated
Separators
Tools Neededfor Removal
Part Number 80-0457
Removal Tool(Need 2)
Part Number 80-0457
Removal Tool(Need 2)
P-8
Silicon Fluid Seal
P-12F
P-8 Prefilter
P-12F Final Filter 81-0429
Model
81-039881-0400*
Part Number
27
47
Weight
19!⁄"!24!⁄"!8
19!⁄"!24!⁄"!11!⁄"
Size
Individually tested andcertified 85% efficientby N.B.S. test
Individually tested andcertified 99.97%efficient by D.O.P. testfor particle size 0.3 micron
Pressure Drop, Clean Filter
0.6" water at 1,250 CFM
0.6" water at 1,250 CFM
Pressure Drop, Clean Filter
For centrifugal compressors,blowers, engines, and gas turbines. For reciprocating compressors, contactUniversal AET for recommendations.
P-8 Prefilter P-12F Final Filter
P-8 and P-12F absolute filter elementsare not cleanable; they must be replacedwith new elements according to theseinstructions.
Rota
ry P
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Blow
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8.8Fi
lters
and
Fi
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ilenc
ers
12
34
56
710
98.8
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Filter ElementsFilter and Filter-Silencers
ResistanceFilterType
W-2-50W-2-10W-2-20W-2-30W-2-40DD-2-50DD-2-10DD-2-20DD-2-30DD-2-40P-11
P-5
P-5EC5
AvailableSizes
12!12!216!20!216!25!220!20!220!25!212!12!216!20!216!25!220!20!220!25!220!25!2
5 dia.!6.68 long
5 dia.!6.68 long
PartNumber
81-041081-016281-016381-016481-016581-041181-017081-017181-017281-017381-0326
81-0317*
81-0421*
Weight
59
101012!⁄"
478!⁄"
8!⁄"
108
$⁄#
$⁄#
RatedFlow
(CFM)
360800
1,0001,0001,250
360800
1,0001,0001,2501,250
105
105
MediaSurface
Area (ft2)
1.02.22.82.83.51.73.74.64.65.7
94.0
6.7
6.7
Efficiency
93% on 10 microns
99% on 10 microns
99.5% overall99% on 10 microns75% on 2 microns99.5% overall99% on 10 microns75% on 2 microns99.5% overall99% on 10 microns75% on 2 microns
InitialResistance
at RatedFlow (in. of H20)
0.08
0.31
0.44
0.83
0.83
Universal AET offers a wide range of sizesand types of air filters and filter-silencers forapplication on air-moving equipment andinternal combustion engines. This catalogcovers our standard off-the shelf models.Most models are stocked for immediateshipment. Special types and configurations,as well as larger sizes that are not cataloged,are quoted upon application to meet specificrequirements.
P-11DD-2W-2
P-5
Easy to specify and orderWhen you work with Universal AET, you cansimply provide the flow conditions andequipment manufacturer’s information, andwe can recommend a filter or filter-silencerbest suited for your application. Using yourinformation, we can prepare a comprehensivetechnical proposal and price quotation.
GalvanizedSteel
CrimpedGalvanized Steel
Wire Mesh
Felted Synthetic(Polyester) Paper Paper Paper
Frame Material
Media
Oil-Free AdhesiveDry or Treated
Soap or Solvent WashCleaning
W-2
GalvanizedSteel
Dry
Compressed Airor Soap Wash
DD-2
AluminizedSteel
Dry
Compressed Air
P-11
Steel
Dry
Compressed Air
P-5
Epoxy-CoatedSteel
Dry
Compressed Air
P-5EC
*48 filters per case.
For dry filters, cleaning instructions are included with each unit. Filter types DD-2 and W-2 are available with stainless steel or aluminum frames. Type W-2 is available withstainless steel or aluminum media.
Rota
ry P
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ve
Blow
er S
ilenc
ers
8.9
Filte
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CCS/CS SeriesFilter-Silencers
CCF/CF Series Filters
Universal AET’s cartridge filters and filter-silencers offer high-performance filtration and silencing in a convenient, economical cartridgeconfiguration. Choose from four standardmodels for pipe sizes ranging from !⁄"" to 16"and for flow capacities ranging from 15 to7,700 CFM. Three types of filter elementmedia—pleated paper, pleated felt, or wiremesh—are available to suit your application.
The CCF and CF series filters are high-quality air filters without a silencing section.The CCF has a removable weatherhood, andthe CF has a removable top plate. Our CCSand CS intake filter-silencers have a built-in silencing section. The CCSfeatures a removable weatherhood, and theCS has a removable top plate for easyaccess to the filter element.
Performance BenefitsDurabilityWeatherhoods for CCF and CCS sizes2!⁄"" through 5" are rugged blue ABScomposite material that may be painted.All other components are carbon steelconstruction with a high-quality semi-gloss enamel finish.High PerformanceUnique design options, combined withthe latest manufacturing techniques,ensure optimum performance and longlife even under demanding conditions.FunctionalChoice of filter only or filter-silencer.Easy to MaintainRemovable lightweight weatherhood (CCSand CCF) or removable top plate (CS andCF) for easy access to the filter element.VersatileInterchangeable element options fordesired filtration characteristics in thesame housing.
CCS Series (with weatherhood) CS Series (with top plate)
CCF Series (with weatherhood) CF Series (with top plate)
!⁄"
Pipe Size
$⁄#
11!⁄#
1!⁄"
22!⁄"
33!⁄"
445568
10121416
34-K50-TT*34-K70-TT*34-K01-TT*34-K21-TT*34-K15-TT*34-K02-TT*34-K25-TT*34-K03-TT*34-K35-TT*34-K04-TT*34-K04-AA*34-K05-TT*34-K05-AA*34-K06-AA*34-K08-AA*34-K10-AA*34-K12-AA*34-K14-AA*34-K16-AA*
34-M50-TT*34-M70-TT*34-M01-TT*34-M21-TT*34-M15-TT*34-M02-TT*34-M25-TT*34-M03-TT*34-M35-TT*34-M04-TT*34-M04-AA*34-M05-TT*34-M05-AA*34-M06-AA*34-M08-AA*34-M10-AA*34-M12-AA*34-M14-AA*34-M16-AA*
34-L21-TT*34-L15-TT*34-L02-TT*34-L25-TT*34-L03-TT*34-L35-TT*34-L04-TT*34-L04-AA*34-L05-TT*34-L05-AA*34-L06-AA*34-L08-AA*34-L10-AA*34-L12-AA*34-L14-AA*34-L16-AA*
34-N21-TT*34-N15-TT*34-N02-TT*34-N25-TT*34-N03-TT*34-N35-TT*34-N04-TT*34-N04-AA*34-N05-TT*34-N05-AA*34-N06-AA*34-N08-AA*34-N10-AA*34-N12-AA*34-N14-AA*34-N16-AA*
CCS CS CCF CF
Part Numbers
*Specify “P” at end of part number for unit with pleated paper elements, “F” for pleated felt or “W” for wire mesh.Refer to page 8.11 for filter element details.
Sizes !⁄""–1" Use CCS or CS Series
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CCS/CS SeriesFilter-Silencers
CCF/CF Series Filters
!⁄"
$⁄#
11!⁄#
1!⁄"
22!⁄"
33!⁄"
4 (NPT)4 (flanged)5 (NPT)5 (flanged)6810121416
P(size)
1522356075
120190275375500500750750
1,1002,2003,0004,3005,9007,700
RatedFlowCap.
(CFM)
8.008.008.009.009.009.00
13.4413.4413.4413.4413.4413.4413.4418.0020.0024.0024.0030.0030.00
D
3.133.133.133.503.503.506.756.756.756.756.756.756.759.50
18.0011.5011.5015.4415.44
H
6.006.006.006.506.506.50
10.0010.0010.0010.0010.0010.0010.0014.0014.0018.0018.0024.0024.00
B
———
1.001.001.131.134.001.814.004.004.004.004.004.004.00
N L Approx. Weight with Paper Elements
CCF CCS CF CS CCF CCS CF CS CCF CCS CF CS
——————
1.001.001.131.133.001.813.003.003.003.003.003.003.00
———
1.001.001.131.134.001.814.004.004.004.004.004.004.00
——————
1.001.001.131.133.001.813.003.003.003.003.003.003.00
3.503.503.507.507.507.637.63
10.508.38
10.5013.3121.8815.3815.3819.3819.38
6.506.506.507.887.887.88
17.6917.6917.6917.6919.6318.2519.5625.2533.8829.2529.2536.2536.25
3.503.503.507.137.137.257.25
10.138.00
10.1312.7521.3814.1914.1918.2518.25
6.506.506.507.887.887.88
17.3117.3117.3117.3119.2517.8819.1324.7533.3828.1328.1335.0635.06
998
111013121412163143526497
101
777
1010101918201921192343568391
143145
555
109
1211131115233041487579
777998
1817191820182235436775
121123
UseCCS
Series
Use CS
Series
Use CCS
Series
Use CS
Series
Use CCS
Series
Use CS
Series
Noise Attenuation, CCS/CS
58
101214141414
63125250500
1,0002,0004,0008,000
Attenuation, dB Octave Band CenterFrequency, Hz
Pressure Drop, All Models
0.71.62.84.46.3
50%75%
100%125%150%
Pressure Drop(in. of H20)
Percentage of Rated Flow
All models have a !⁄%" FNPT tap for installation of a gauge or manometer to monitor pressure drop. Sizes !⁄"" through 3!⁄"" are standard with female pipe thread connection(FNPT). Sizes 4" and 5" are available with female threads or flanges. Please specify “threaded” or “flanged” when you order 4" and 5" sizes. Sizes 6" through 16" are standardwith 150# ANSI drilled plate flanges. Rated capacity is based upon exit velocity of approximately 5,500 ft/min. If pressure drop allowance permits, capacity may be increasedby as much as 50%.
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CCS/CS/CCF/CFFilter Elements
Pleated Paper ElementSpecifications
High-quality industrial grade filterpaper—pleated and oven-cured duringproduction.Oven-cured plastisol end caps withmolded sealing beads.Media efficiency: 99.5% on 2 microns; 97% on 1 micron.Maximum operating temperature: 200°Ffor units with !⁄"" through 16" pipe sizes.
Service InstructionsBecause of the low cost of the paperelement, it is generally treated as aconsumable and replaced when dirty.However, depending on customerpreference, the paper element may becleaned with compressed air and reused.
Compressed Air CleaningCarefully direct compressed air (100 PSImaximum) through the dry element,opposite the normal direction of flow. Aftercleaning, inspect carefully for holes orcracks. If damaged, replace element.
Pleated Felt ElementSpecifications
Durable polyester felt media—pleated.Oven-cured plastisol end caps withmolded sealing beads (larger elementsfor pipe sizes 10", 12", 14", and 16" havemetal end caps with closed cell rubbergaskets).Media efficiency: 99% on 10 microns.Maximum operating temperature: 200°Ffor units with !⁄"" through 8" pipe sizes,250°F for units with 10" through 18" pipesizes using elements with metal end caps.
Service InstructionsPleated felt elements may be cleaned withcompressed air (as described for paperelements) or water and reused.
Water CleaningRap gently to dislodge accumulated dirt,soak thoroughly approximately 15 minutesin warm water and mild detergent. Rinsethoroughly under low pressure water. Airdry—do not dry with compressed air. Aftercleaning, inspect carefully for holes orcracks. If damaged, replace element.
Wire Mesh ElementSpecifications
Galvanized wire-mesh media—corrugated construction.May be cleaned and reused indefinitely.Wire mesh elements are considered“roughing” filters and are notrecommended for applications whichrequire efficient filtration of fine particles.Approximate efficiency: 93% on 10microns. Efficiency will vary withelement oil or adhesive coverage.Maximum operating temperature: 200°F for !⁄"" through 16" with oil-freeadhesive (flash point of adhesive is235°F) and 300°F for !⁄"" through 16"without adhesive.
Service InstructionsNew elements are delivered pre-treated withUniversal AET’s oil-free adhesive. See theback page for details. For best efficiency,wire mesh elements must be retreated aftereach cleaning. Spray the element on bothsides with Universal Oil-Free Adhesive, P/N81-0323, following the directions on thecontainer. For oil treatment, dip the elementin SAE 30–50 motor oil and drain thoroughlybefore using.
CleaningTo clean wire mesh elements, wash insolvent or warm water and detergent in acontainer large enough for completeimmersion of element. Rinse completely,drain, and either air dry or use compressedair. After cleaning and drying, retreat theelement with oil-free adhesive or oil asdescribed.
Three types of filter elements are availablefor Universal’s cartridge filters and filter-silencers. Pleated paper elements providethe highest efficiency and are consideredstandard. Pleated felt and wire meshelements are available for less demandingservice with respect to efficiency. The threetypes of elements are completelyinterchangeable and will fit all CCS, CS, CFor CCF filter housings.
!⁄"
$⁄#
11!⁄#
1!⁄"
22!⁄"
33!⁄"
4568
10121416
P(Nom.)
81-047081-047081-047081-047181-047181-0471
81-1063, 81-0472 (old)81-1063, 81-0472 (old)
81-106381-1063
81-1063, 81-0474 (old)81-047581-0475 (2)81-116381-116381-116481-1164
Replacement Element Part Number
Paper Felt Wire Mesh
81-120281-120281-120281-120381-120381-1203
81-1205, 81-1204 (old)81-1205, 81-1204 (old)
81-120581-1205
81-1205, 81-1206 (old)81-120781-1207 (2)81-120981-120981-121081-1210
81-103581-103581-103581-103681-103681-1036
81-1038, 81-1037 (old)81-1038, 81-1037 (old)
81-103881-1038
81-1038, 81-1039 (old)81-1040
81-1040, (2) 81-1199 (old)81-120081-120081-120181-1201
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ILF/ILFS SeriesIn-line Filters
Durable ConstructionCarbon steel construction with a high-quality blue enamel finish.Easily removable top plate for access to the filter element.ASME Code construction and specialmaterials, such as stainless steel, are available.
Universal AET’s ILF and ILFS Series of in-line air filters are designed to withstand thedemanding requirements of pressure andvacuum applications. Choose from tenstandard sizes ranging from 3" to 18" andflow capacities ranging from 275 to 9,700CFM. Three types of filter element media—pleated paper, pleated felt, or wire mesh—are available to suit your application.
A
Y
C
L
4
D
Lift Handle
RemovableTop Plate
Filter Element
$⁄#" NPT Drain
!⁄#" Pressure TapK
PR
R
P
3
inlet
inlet
K K
A
C
Lift Handle
RemovableTop Plate
Filter Element
!⁄#" Pressure Tap
$⁄#" NPT Drain
P
R R
3
PY
L
ILF Series ILFS Series
ILF-3ILF-4ILF-5ILF-6ILF-8ILF-10ILF-12ILF-14ILF-16ILF-18ILFS-3ILFS-4ILFS-5ILFS-6ILFS-8ILFS-10ILFS-12ILFS-14ILFS-16ILFS-18
Model
34-A03-TT*34-A04-AA*34-A05-AA*34-A06-AA*34-A08-AA*34-A10-AA*34-A12-AA*34-A14-AA*34-A16-AA*34-A18-AA*34-B03-TT*34-B04-AA*34-B05-AA*34-B06-AA*34-B08-AA*34-B10-AA*34-B12-AA*34-B14-AA*34-B16-AA*34-B18-AA*
Part Number
34568
101214161834568
1012141618
P(nom.)
1414141618222228303014141416202424303636
D
24!⁄#
24!⁄#
25!⁄#
2839!⁄"
35!⁄"
37!⁄"
4143$⁄#
43$⁄#
23232327353437444852
L
—$⁄%
$⁄%
!⁄"
!⁄"
!⁄"
!⁄"
!⁄"
!⁄"
!⁄"
—$⁄%
$⁄%
!⁄"
!⁄"
!⁄"
!⁄"
!⁄"
!⁄"
!⁄"
R
15!⁄"
15!⁄"
1618!⁄#
28!⁄#
2223272829555!⁄"
678!⁄"
101112!⁄"
13
Y
2727283445424452555729292936444447586266
C
2020202224282834363620202022263030364242
A
1111111213151518191911111112141616192424
K
100110120120140295315450500505115125130170245365395605895945
Weight(est.)
275500750
1,1001,9203,0004,3005,9007,7009,700
275500750
1,1001,9203,0004,3005,9007,7009,700
RatedCap.
(CFM)
888881212121212888881212121212
Number ofBolts
The C dimension is clearance required to remove elements. Non-ASME code construction is suitable for 15" PSI maximum working pressure or 20" Hg operating vacuum.Estimated weight does not include elements. Size 3" is standard with male pipe thread connection (MNPT). Sizes 4" through 18" are standard with 125/150 lb ANSI drilled plateflanges. Rated capacity is based upon flow velocity of approximately 5,500 ft/min. If pressure drop allowance permits, capacity may be increased by as much as 50%. Refer topage 8.14 for filter element details.
*Specify “P” at end of part number for unit with pleated paper elements, “F” for pleated felt or “W” for wire mesh.
Customize to Your ApplicationDesigned for application requirements.Optional design features for specialproduction and assembly conditions are available.Choose an ILF model for an L-configuration or an ILFS for opposed connections.Interchangeable paper, felt, or wire meshelements, for desired filtrationcharacteristics in a single housing.Built-in taps for pressure gauges.
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ILFV SeriesVacuum Service In-line Air Filters
All models have a !⁄%" FNPT tap for installation of a gauge or manometer to monitor pressure drop. The C dimension is clearance required to remove elements. Non-ASMEcode construction is suitable for 15" Hg vacuum. Not applicable for pressure applications. Rated capacity is based upon flow velocity of approximately 5500 ft/min. If pressure drop allowance permits, capacity may be increased by as much as 50%. Flange connections are drilled per ANSI standard for each size. Sizes 2" through 4" arestandard with male pipe threaded inlet and outlet fitting (MNPT). Sizes 5" through 14" are standard with plate flanges drilled to ANSI standards (dashed lines on sketch).Weight does not include filter elements. Refer to page 8.14 for filter element details.
*Specify “P” at the end of part number for paper element or “F” for synthetic felt.
Filter ElementsPleated paper elements offer the highestefficiency and are considered “standard”for the ILFV series units. Pleated feltelements are also available for lessdemanding service. Both element types are completely interchangeable and will fit in any ILFV housing.
Universal’s Filter Restriction Gauge providesa convenient, accurate means of monitoringfilter pressure drop as the filter elementbecomes increasingly loaded with dirt.In-line air filters are standard with threadedconnections for directly mounting the gauge.See p. 9.15 for a complete description.
ILFV-2ILFV-2!⁄"
ILFV-3ILFV-4ILFV-5ILFV-6ILFV-8ILFV-10ILFV-12ILFV-14
Model
34-D02-TT*34-D25-TT*34-D03-TT*34-D04-TT*34-D05-AA*34-D06-AA*34-D08-AA*34-D10-AA*34-D12-AA*34-D14-AA*
Part Number
22!⁄"
34568
101214
P(nom.)
14141414181824243030
D
9!⁄"
9!⁄"
9!⁄"
9!⁄"
1220!⁄"
13!⁄#
22$⁄#
17!⁄#
30$⁄#
L
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
3!⁄"
N
6!⁄"
6!⁄"
6!⁄"
6!⁄"
7$⁄#
128!⁄#
1310!⁄#
17
Y
7777
101011111515
C
10101010121215151818
K
18192021506590
125160205
Weight(est.)
120190275500750
1,1002,2003,0004,3005,900
Rated Cap.(CFM)
Universal AET’s new ILFV Series ofin-line air filters are designed especially forvacuum applications as an economicalalternative to our ILF Series. Choose fromten standard pipe sizes ranging from 2" to14" and flow capacities ranging from 120 to5,900 CFM. Two choices of filter elementmedia—pleated paper or pleated felt—areavailable to suit your specific application.
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Filter Elements
34568
1012141618
81-106381-106381-106381-047581-0475 (2)81-116381-116381-116481-116481-1164
81-120581-120581-120581-120781-1207 (2)81-120981-120981-121081-121081-1210
81-103881-103881-103881-104081-1040 (2)81-120081-120081-120181-120181-1201
P(nom.)
Replacement Element Part Number
Paper Felt Wire Mesh
ILF/ILFS Series
22!⁄"
34568
101214
81-106381-106381-106381-106381-047581-0475 (2)81-116381-1163 (2)81-116481-1164 (2)
81-120581-120581-120581-120581-120781-1207 (2)81-120981-1209 (2)81-121081-1210 (2)
——————————
P(nom.)
Replacement Element Part Number
Paper Felt Wire Mesh
ILFV Series
Oil Free AdhesiveThis is an oil-free product developed for use on viscousimpingement type filters. It is a substitute for applications that donot permit oil wetting of the filter elements, such as oil-freecompressors. Universal Oil-Free Adhesive is available in 13 oz.aerosol spray cans.
Filter Restriction GaugeThe Filter Restriction Gauge provides a convenient, accuratemeans of monitoring filter pressure drops as the filter elementbecomes increasingly loaded with dirt. Cartridge Filters and Filtersilencers are standard with threaded connections for directmounting of the gauge.
81-0323
81-1234
94-1542 Rev 2
AMERICAS MANUFACTURING
GLOBAL SUPPORT FACILITIES
MUSCODA, WI100,000 Sq. Ft.
EUROPEUnit 2, BarleyfieldHinckleyLeicestershireLE10 IYEPhone +44 (0)1455 [email protected]
ASIA PACIFIC71 Bukit Batok Crescent #05-07Prestige CentreSingapore 658071SingaporePhone +65-6665 [email protected]
INDIASurvey No. 270/1/16Baner, Pune 411045IndiaPhone +91 020 [email protected]
UNITED STATESCORPORATE HEADQUARTERS1925 Highway 51/138P.O. Box 411Stoughton, WI 53589 USAPhone +1 (608) [email protected]
BELOIT, WI110,000 Sq. Ft.
SAN LUIS POTOSí, MEXICO110,000 Sq. Ft.
WWW.UNIvERSALAET.COM
© 2013 Universal Acoustic & Emission Technologies, Inc. All rights reserved.
