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A U T O
S E L F C
L E A I N I N G
- 99 -
Au toma t i c Se l f -C lean ing
S t ra iners Pressures to 740 PSIG (51 BARG)
Temperatures to 400F (204C)
qWater and Liquid service
q Power Industry C ooling water
q Pulp & Paper Removing fibers
q Process Equipment P rotect equipment
qM etal & M ining Q uenching, blast furnace
cooling
Applications
SIZES
2 (50mm) to36 (900 mm)
RATINGS
ASME Class 150
ASME Class 300
END CONNECTIONS
Flat Faced Flanged
Raised Faced Flanged
Ring Joint Flanged
Buttweld
MATERIALS
Carbon Steel
Stainless Steel
Other materialsupon request
FEATURES
Standard and Custom Engineered Designs
Complete Control Systems
Intermittent or Continuous Mode options
Individual or Skid System designs
High Strength reverse rolled wedge wire screens
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AUTO
SELFC
LEAINING
STRAINERS
- 100 -
800
700
600
500
400
300
200
100
0
150#Steel
300#Steel
FA SERIESFABRICATED AUTOMATIC
SELF-CLEANING STRAINERS
Pressures to 740 PSIG (51 BAR G )
Temperatures to 400F (204C )
q Standard and Custom Engineered Designs
q Reverse rolled wedge wire screen for high strength
q Proportioned outer annulus decreases pressuredrop
q Low inertia backwash assembly increasesefficiency and minimizes power requirements
q Fail safe mode to prevent internal damage fromjamming by large debris
q Large inspection port allows for inspection andremoval of settled debris
MODELSq FA1 Inline, side backwash drain, (10" 36")
q FA2 Inline, bottom backwash drain, (2" 8")
q FAZ C ustom C onfiguration
OPTIONS (Consult factory)q O ther materials, sizes and/or configurations
q O ther screen sizes/materials
q U stamped vessels
q External/Internal coatings
q C ustom control panels and wiring per customer requests.
q Adjustable timer and differential pressure override switch forautomatic intermittent control mode
q C ontinuous on/off control mode
q C ustomer requested control valves and tubing
q Skid mounted or free standing designsq C ontact Factory for other Options
F A 1 C R 1 R - B V 1
1 2 3 4 5 6 7 8 9 10 11
S creen S td.
M odel Body Inlet C onnec- Control Wedge Slot
M aterial Size C lass tion Dash Panel1 Wire2 O pening
FA Series Ordering Code
Model - Position 1 - 3FA1 - Inline, S ide Ba ckwa sh dra in(S izes 10"- 36")
FA2 - Inline, Bottom Backwashdrain (S izes 2"- 8" )FAZ - Cus tom Co nfigura tion
Body Material - Position 4C - Carbon SteelV - 304 S ST- 316 SSM - MonelH - Has telloyZ - Other
Inlet Size - Position 5H - 2J - 212
K - 3M - 4N - 5P - 6Q - 8R - 10S - 12T- 14
Class - Position 61 - 1503 - 300Z - Other
PRESSURE/TEMPERATURE CHARTAS ME B 16.34
Connection - Position 7B - But t WeldF - Flat Face Flange
J - Ring J oint Flang eR - Raised Face FlangeZ - Other
Dash - Position 8
Control Panel1 - Position 9A - NoneC - 1-pha se, 110/120 VACE - 3-pha se, 460/or 80 VACF - 3-phase, 575 VACZ - Other
1. For standard control system components see page 10. For a ll other plea se c ons ult fa cto ry.2. Sta nda rd S creen material is 304SS
For any variations, use the pa rt numbering s ystem ab ove b ut clearly indicate the a dd itional requirements.
APPLICATIONS
qWater and Liquid service
q Power Industry - cooling water
q Pulp & P aper - Removing fibers
q Process Equipment - P rotect equipment
q M etal & M ining Q uenching, blast furnace cooling
qWater & Waste - Clean plant service water
APPLICABLE CODESq Designed/M anufactured to meet ASM E B31.3 or
AS M E B31.4 and/or ASM E Section VIII, D iv. 1.
q C anadian Registration Numbers (C RN) upon request
qWelders certified to ASM E S ection IX
q AS M E U Stamp upon request
Screen - Wedge Wire2 -Position 10
V - 304S ST- 316S SM - MonelH - Has telloyZ - Other
Standard Slot Opening -
Position 111 - .156"2 - .125" (1/8" )3 - .094"4 - .063" (1/16" )7 - .031" (1/32" )8 - .020"9 - .015"A - .010"B - .005"C - .003"Z - Other
U - 16V - 18
W - 20X - 22Y - 241 - 282 - 303 - 364 - 40Z - Other
See page 104
See page 105
see page 105
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A U T O
S E L F C
L E A I N I N G
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S TANDARD S TANDARDS IZE S C REEN MATERIALS
304SS10-36 .125" (1/8" )Wedge Wire
SCREEN OPENINGS*
Connections: 10 - 36 RF, FF, RTJ or B uttw eld
FA1 SERIESFABRICATED AUTOMATIC
SELF-CLEANING STRAINERS
SPECIFICATIONStrainer shall be designed and manufactured to meet
AS M E B31.3 or ASM E B31.4 and/or ASM E Section
VIII, Div I. The strainer body shall be 1-piece
construction, fabricated steel or other specifiedmaterial and inlet/outlet connections shall be In-Line
Design with a side backwash drain. The control
system shall be capable of automatically controlling
and monitoring the strainers operation. The strainer
shall have a fail-safe mode to prevent internal damage
from jamming of strainer shaft caused by large debris.
The strainer shall have a Nema 4 control panel with an
actuated valve to provide control of the backwash
flow. T he screen shall be size _______ wedge wire
construction. The strainer shall have an inlet size of
____ and open area ratio of _______. The Automatic
Strainer shall be SSI FA1____.
S IZE P RES S URE
10-36 20 P S ID
MINIMUM INLET PRESSURE(I/O Differential)
INLET BODY F G H J K L P WEIG HT
S IZE S IZE A B C D E (NP T) (Dia .) (NP T) (NP T) (B .C .) (Dia .) M N O (Dia .) Q R DRY WE T C O VE R
10 24 36 19 53 7438 111 2 2 1/2 1/2 30316 7/8 27 15 16 8 9 14 1200 1950 415(250) ( 600) (914) (483) (1346) ( 1889) (2819) (2) (50) ( 1/2) (1/2) (767) (22) (686) (381) (406) (203) (229) (356) (544) ( 884) (188)
12 24 36 19 53 7438 111 2 2 1/2 1/2 30316 7/8 27 15 16 8 9 14 1200 1950 415(300) ( 600) (914) (483) (1346) ( 1889) (2819) (2) (50) ( 1/2) (1/2) (767) (22) (686) (381) (406) (203) (229) (356) (544) ( 884) (188)
14 26 46 25 60 813
8 120 2 3 1/2 1/2 323
16 7/8 33 19 20 8 15 18 1700 3000 363(350) ( 660) (1168) (635) (1524) (2067) ( 3048) (2) (80) ( 1/2) (1/2) (817) (22) (838) (483) (508) (203) (381) (457) (771) (1361) (165)
16 30 46 26 66 8738 127 2 3 1/2 1/2 3778 1 34 19 20 8 15 18 1800 3100 530(400) ( 760) (1168) (660) (1676) (2219) ( 3226) (2) (80) ( 1/2) (1/2) (962) (25) (864) (483) (508) (203) (381) (457) (816) (1406) (240)
18 30 50 27 73 9438 133 2 3 1/2 1/2 3778 1 35 22 23 8 15 18 2600 4900 530(50) ( 760) (1270) (686) (1854) (2397) ( 3378) (2) (80) ( 1/2) (1/2) (962) (25) (889) (559) (584) (203) (381) (457) (1179) (2222) (240)
20 36 50 30 79 1 0038 144 2 4 1/2 1/2 4418 1 38 23 23 12 16 20 2900 5400 883(500) (910) (1270) (762) (2007) (2550) (3658) (2) (100) (1/2) (1/2) (1121) (25) (965) (584) (584) (305) (406) (508) (1315) (2449) (400)
24 40 64 32 87 1 0838 157 3 4 1/2 1/2 5158 138 40 29 30 12 16 22 4700 9 700 1205(600) (1010) (1626) (813) (2210) (2753) (3988) (3) (100) (1/2) (1/2) (1311) (35) (1016) (737) (762) (305) (406) (559) (2132) (4399) (546)
30 48 78 45 117 13838 200 3 4 1/2 1/2 5978 138 53 35 36 12 22 34 8600 14400 2015(760) (1210) (1981) (1143) (2972) (3515) (5080) (3) (100) (1/2) (1/2) (1521) (35) (1346) (889) (914) (305) (559) (864) (3900) (6531) (914)
36 58 96 53 140 16138 234 3 5 1/2 1/2 6978 138 61 44 46 12 24 40 14800 32000 3492(910) (1470) (2438) (1346) (3556) (4099) (5944) (3) (125) (1/2) (1/2) (1775) (35) (1549) (1118) (1168) (305) (610) (1016) (6712) (14512) (1584)
FA1 DIMENSIONS inches (mm) AND WEIGHTS pounds (kg)150# C lass flanges shown (For 300# dimensions and weights-contact factory)
PINSP ECTION
PORT(Dia.)
GBACKWASHPORT(Dia.)
H (NP T)DIFFERENTIAL(In Front)
J (NP T)VENT
F (NP T)DRAINL (4X)
BOLTHOLES
(Dia.)
MATERIALS OF CONSTRUCTION*-
(Carbon Steel Shown*)Body....... ........ ....... ......SA53 Gr B or SA106-BFlanges..................................................SA105Nozzles... .... .... ... .... .... ..SA53 G r B or SA106-B
Heads ..........................................SA234 WPBScreen1 ....... ........ ........ ........ .....SA240-304 SSBackwash Arm ....... ........ ....... ..SA 240-304 SSBearing1 ... ... .. ... .. ... .. ..Varies upon tempertature
G asket - C over1 .. .. .. ..Red rubber or BlueG uardG asket - Basket1 .... .... ... .G um R ubber or VitonG asket - Bearing1.... .... ... .G um R ubber or VitonPacking1 ..........................TFE or Cotton Nitrile
Stud................................................SA 193-B7Nut..................................................SA 194-2H
* Other Materials Available. Consult Factory.
1. Recommended S pare Parts
Materials specification will change dependent on
customer design contact factory for certified prints.
*Dimensions shown are subject to change. Contact factory for certified prints when required.
* See other screen sizes on page 105
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AUTO
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INLET BODY F G H J K L WEIG HT
S IZE S IZE A B C D E (NP T) (Dia .) (NP T) (NP T) (B .C .) (Dia .) M DRY WET COVER
2 8 16 5 1738 3834 60 1/2 1 1/2 1/2 1334 9/16 13 310 329 50(50) (200) (406) (127) (441) (984) (1524) (1/2) (1) (1/2) (1/2) (349) (14) (330) (141) (149) (23)
3 8 16 5 1738 3834 62 1/2 1 1/2 1/2 1334 9/16 13 320 340 50(80) (200) (406) (127) (441) (984) (1575) (1/2) (1) (1/2) (1/2) (349) (14) (330) (145) (154) (23)
4 10 18 834 2378 52 76 1/2 1 1/2 1/2 16 9/16 2312 430 490 72(100) (250) (457) (222) (606) (1321) (1930) (1/2) (1) (1/2) (1/2) ( 406) (14) (597) (195) (222) (33)
6 12 2034 834 2958 5734 86 1/2 112 1/2 1/2 18 9/16 2312 560 670 103(150) (300) (527) (222) (752) (1467) (2184) (1/2) (112) (1/2) (1/2) (457) (14) (597) (254) (304) (47)
8 16 24 834 38 6534 100 1/2 112 1/2 1/2 21516 9/16 2312 875 1120 176(200) (400) (610) (222) (965) (1670) (2540) (1/2) (112) (1/2) (1/2) (541) (14) (597) (397) (508) (80)
*Dimensions shown are subject to change. Contact factory for certified prints when required.
FA2 DIMENSIONS inches (mm) AND WEIGHTS pounds (kg)150# C lass flanges shown (For 300# dimensions and weights-contact factory)
H (NPT)
DIFFERENTIAL
F (NP T)
DRAIN
L (4X)BO LT
HOLES(Dia. )
J (NPT)
VENT
G
BACKWAS H
(Dia. )
S TANDARD S TANDARDS IZE S CREEN MATERIALS
2-8 .125" (1/8") 304SS Wedge Wire
SCREEN OPENINGS*
Co nnections: 2"-8"RF, FF, RTJ or B uttw eld
FA2 SERIESFABRICATED AUTOMATIC
SELF-CLEANING STRAINERS
SPECIFICATIONStrainer shall be designed and manufactured to meet
ASM E B31.3 or ASM E B31.4 and/or ASM E Section
VI II, D iv I. The strainer body shall be 1-piece
construction, fabricated steel or other specifiedmaterial and inlet/outlet connections shall be In-Line
Design with a bottom backwash drain. The control
system shall be capable of automatically controlling
and monitoring the strainers operation. The strainer
shall have a fail-safe mode to prevent internal damage
from jamming of strainer shaft caused by large debris.
The strainer shall have a Nema 4 control panel with an
actuated valve to provide control of the backwash
flow. The screen shall be size _______ wedge wire
construction. The strainer shall have an inlet size of
____ and open area ratio of _______. The Automatic
Strainer shall be SSI FA2____.
MATERIALS OF CONSTRUCTION*-
(Carbon Steel Shown*)Body....... ........ ........ .....SA53 G r B or SA106-B
Flanges..................................................SA105Nozzles.... .... .... .... .... ... .SA 53 G r B or SA106-BHeads ..........................................SA234 WPBScreen1 ........ ....... ........ ........ .....SA240-304 SS
Backwash Arm ....... ........ ....... ..SA240-304 SSBearing1 .. .. ... .. ... ... .. ... Varies upon tempertatureG asket - Cover1 .. .. ..Red rubber or BlueGuardG asket Basket1 .... .... ... .G um R ubber or Viton
G asket - Bearing1 .. ..Red Rubber or BlueGuardPacking1 ..........................TFE or Cotton NitrileStud................................................SA 193-B7
Nut ................................................SA 194-2H
* Other Materials Availab le. Co nsult Fac tory
1. Recommended S pare Pa rts
Materials specification wil l change dependent on
customer design contact factory for certified prints.
S IZE P RES S URE
2" -8" 20 P S ID
MINIMUM INLET PRESSURE
(I/O Differentia l)
* See other screen sizes on page 105
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A U T O
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L E A I N I N G
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FA SERIESFABRICATED AUTOMATIC SELF-CLEANING STRAINERS
GENERAL OPERATION
Operation1. The unfiltered fluid enters the
strainer inlet into the lower
s ingle cha mb er. This cha m-
ber a cts to b oth s low the fluid
prior to straining and to
collect any settled debris.
2. The fluid pass es upward and
then rad ia lly o utwa rd through
the wedge wire straining
element. Deb ris la rge r then
the wedge wire slot size is
unable to pass through the
straining element.
3. The clean f luid c ontinues
through the properly propor-
tioned flow path and out the
strainer outlet.
4. The strainer is c ontrolled by an
electrical panel, an actuated
va lve a nd a differentia l press ure
sw itch. The clea ning cyc le ca n
be initiated manually or auto-
matically by a timer with a
differential pressure override.
5. When ba ckwashing is initiated
the moto r begins to s low ly turn
the backwash assembly (ap-
proximately 2 rpm) and simul-
taneously the backwash valve
is ope ned . The d ifferential pres-
sure between the line pressure
and atmosphere is the driving
force behind the backwashing
process.
6. The hollow tubular backwash
a ss embly, which is piped to the
atmosphere, slowly rotates in
close contact with the internal
straining element. Only a small
potion of the screen is isolated
allowing for uninterrupted
operation of the strainer during
the backwashing process.
7. The press ure differential ca uses
a large reverse flow across thescreen and into the tubular
ba ckwash a ssembly. The change
in velocity of the fluid entering
the backwas h as sembly creates
a vac uum a nd s uction, cleaning
the strainer element from the
inside. A port shoe, intercon-
necting the tubular backwash
assembly, optimizes the effec-
tiveness of this backwash jet
stream.
The S pence S tra iner Fa brica ted Automa tic S elf-
Cleaning Strainer utilizes the latest technology in
ba ckwa sh s trainer design.
The strainer clea ns itself using a ba ckwa sh s ystem
which is c ontinuous a nd/or controlled b y a n auto ma tic
control system. A tubular backwash assembly slowly
rota tes in close co ntac t w ith the internal wed ge-wire
stra ining e lement, iso la ting o nly a sma ll portion o f the
element a t any given time. Deb ris is removed by a
backwash flow which carries unwanted debris away
from the internal element and o ut of the stra iner. The
operation is deta iled a s follow s:
FLOW SCHEMATIC
1 1 12
2
3
3
3
7
8
8. Unwanted debris is ca rried into
the full port b a ckwa sh m a nifold
and out the backwas h connec-
tion. During the w hole opera tion
the flow remains uninterrupted
keeping flow loss at a mini-
mum.
9. Upon completion of the cycle ,
the control panel initiates turn-
ing the motor off and simul-
taneously clos ing the bac kwa sh
valve.
360 Degrees
Strained clean
continuous flow
Rotating
backwash arm
discharges
debris
Atmospheric pressure ensures efficiency
and minimizes power requirements
during the backwash cycle.
BACKWASH ASSEMBLY /STRAINING ELEMENT
INTERFACE
Two point p a rticle
contact minimizesplugging
&binding.
The d eb ris
dislodging force
is maximized by
conce ntrating all the
backwash flow momentum
into the slots.
BACKWASHCYCLE
STRAININGCYCLE
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FA SERIESFABRICATED AUTOMATIC SELF-CLEANING STRAINERS
CONTROL SYSTEMS
The S pence S tra iner control panels a re de signed fo r
simple and relia ble opera tion. The de sign a llow s fo r
quick and easy field adjustments as required by theservice co nditions .
The FA S eries s trainers a re ma nufac tured c omplete
with our standard control systems. Optional custom
des igns to mee t spe cific c ustome r and/or service
req uirements ca n be furnished .
Standard Control System Components
contact factory for other options
- Nema 4X rated pa nel bo x UL/CS A a pproved
- Ca rbon steel, phospha te c oa ted w /grey
polyester powder coa ted pa nel box
- Adjustable timer
(1-10 min on time, 10 min 10 hr off time)
- Aluminum Nema 4 differential pressure override
sw itch (0-15 ps id)
- Control relay for backwash valve activation
- Three Indica tion pa nel lights Po wer on, Ba ck-
w a sh Va lve Ope n, High D ifferential P res sure
- S elec tor S witch fo r Hand(On)/Off/Auto service
- Motor starters with Auxiliary contact
- Terminal bloc k for exte rna l connec tions
- TEFC motor 110/120V, s ingle phase 60Hz, 1/3 Hp
- 110/120 VAC input
- Ca rbon ste el electrica lly a ctua ted b a ll valve for
ba ckwa sh (110/120 VAC/60 HZ) Nema 4
actuator
Modes of OperationThe se lecto r switch a llow s the cus tomer to e a sily
cha nge be tw een three mod es : OFF, AUTO (Automa tic
Intermittent), or HAND (Continuous).
Auto ma tic Intermittent (AUTO) When the selector
sw itch is in the AUTO position the st rainer operat es
with the a djusta ble timer. An a uthorized opera tor ca n
adjust the OFF time setting (the time after which it will
initiate backwash 10 min to 10 hour cycle) and ON
time setting (the time interval for which it will keep
bac kwa sh system ON 1 to 10 min cycle) by a djus ting
the timer.
The differentia l press ure switch should b e set a t 2 psig
over the a nticipated clean pressure drop. An a uthorized
opera tor ca n a djust OFF time s etting o n the d ifferentia l
pressure switch (the differential pressure at which it will
initiate ba ckwa sh range 0 15 ps id). This switch w ill
override the time cycle and initiate backwash should
the differential pressure rise above the programmed
setting. After the differential pressure has been
satisfied, the strainer will continue cleaning for 60seconds beyond that point.
The se ttings a re do ne depe nding o n the q uantity of
debris collected and limiting value of the differential
pressure. Experience will dictate the optimal
settings for the timers.
Continuous (HAND) When the selector switch is in
the HAND position the strainer will operate in a
continuous mode. In this mode the strainer will
backwash continuously with the backwash valve
open a nd the drive mo tor running. The continuous
ba ckwa sh mod e may b e des irab le or neces sa ry if the
insta lla tion experience s high so lid loa dings.
Ba ckwa sh Valve
Electrically actuated ball
valves suitable for water
service are standard on
all FA Control Systems.
Contact factory for other
options. Standard sizes
of backwash valves are
as follows :
Strainer Drain
Inlet/Outlet Valve
Size Size
2" - 4" 1"
6" - 8" 112"
10" - 12" 2"
14" - 18" 3"
20" - 36" 4"
Recommended