• On Time Delivery • According to Standard• Customization • Quality • Cooperation

008 SAT CATALOG REV 00JANUARY 2019

SOUND ATTENUATOR

Sharqawi Air Distribution Systems Co. Factory, has been in the market since 1995, as one leading manufacturer in the kingdom of Saudi Arabia in the field of fabrication of HVAC duct and its Accessories. Upon whose satisfaction we have been allowed to grow and prosper in this highly competitive marketplace.

As one of the leading HVAC ducts and its accessories manufacturers, our reason of ’being’ is a combination of our vision, mission, and values.

Vision: We aspire making Sharqawi the most trusted manufacturer of HVAC ducts and its accessories in the Kingdom of Saudi Arabia, region and the world.

Mission:To aim for design perfection and expanding our market-share by enhancing our marketing, satisfying customer requirements, complying with the international quality standards and consistently sustaining our improvement program.

Values:Our values reflect who we are and our reason for being.

Quality: We provide exquisite products that deliver exceptional values to our customer.

Integrity: We boost the highest integrity in all of our activities and operations.

Customer commitment: we develop positive relationships that make a beneficial influence on our client’s business.

Teamwork: We work together across boundaries to meet the expectations of our customers and support the company to win.

A Will To Win: We exhibit a strong will to win in the marketplace and every aspect of our business.

Respect for people: We value our people, encourage their development and reword their performance.

Good residents: We are good residents in the communities in which we live and work.

Personal Accountability: We are personally accountable for delivering on our commitment.

ABOUT US

S o u n d A t t e n u a t o r

1

GENERAL What is Sound ?

Sound is defined as a disturbance in an elastic medium that can be detected by the human ear. The medium can be gas, liquid or solid. Noise is undesirable sound or sound without value. The pressure waves (or sound) act on the inner ear, which is what we hear. The best sound is not necessarily no sound. In an open office concept, background sound offers privacy for conversations. Sound attenuator plays an important role in attenuating the sound from the HVAC fans and generator rooms. Sound attenuator are used in both Supply and exhaust side within in the line of ventillation ducts, and in generator rooms.

Supply Air

Air Distribution Duct

Air Distribution Duct

Sound Attenuator

Sound Attenuator

Ceiling

Ventillation Fan

Typical HVAC Air Distribution System, with sound attenuators installed at Supply and exhaust.

OVERVIEW OF SHARQAWI SILENCERS:

Sharqawi factory produces silencers, as per the design from lindab, which has been tested as per ISO 7235 @ acoustic laboratory, Lindab competence center, Farum, Denmark.Sharqawi Produces, Rectangular, Round and bended type silencers based on the customer requirement.

Sharqawi Factory uses every data to analyze and technically select sizes with respect to customers required NC or Db considering the minimum pressure drop, using Lindab provided software, Dim silencer which has been developed by Lindab.

METHOD OF MEASUREMENTSharqawi silencers have been tested in accordance with ISO 7235 ”Acoustics - Measurement procedures for ducted silencers - Insertion loss, flow noise and total pressure loss”at Lindab Acoustic Laboratory, Lindab competence center, Farum, Denmark.

DESIGN:Sound attenuator comprises

1. Casing. 2. Baffles.

Casing :

Sound Attenuator has an outer casing or duct, where in the duct connections and thickness will be followed as per SMACNA standard.

Baffle :

The Duct inner has baffles for Rectangular Silencer with baffle width of 200mm or 100mm, which are produced using a strong structure of Sheet metal, with perforated sheets, infilled with fine acoustically fit Rockwool of desired density. The perforation gives a fine passage of airflow with minimal pressure drop, and also protects the strong hold of the wool.The round Silencers are with an inside Offset layer from Outer casing of of 100mm and 200mm thick layer, infilled with Rockwool based on requirement and model.

CONSTRUCTION MATERIALS:All the Fittings and ducts in the standard range are made from hot dip galvanized steel sheet with a yield point in tension of 200 N/mm2, and the zinc coating shall at least comply with Z 275, and for stainless steel, depends on the grade requirements of customer.

Customized Sheet metal thicknesses:

If higher thcikness is requested from customer, we can produce the sound attenuator in higher gauges as per customer requirement.

Casing Incase of GI, Cold Rolled Hot Dip Galvanized Steel G90 comply to Z275, of Min Ga-22. For Stainless Steel, the grade will be as per requirement.

FlangeIN/Out connection

Duct Mate flange 35mm, for widths less than 1000mm, Angle Bar 50x50x5 mmfor over 1000mm, or as customer requires. The fixation will be Revitting or welding.

Acoustic fill Techno Rockwool / Saudi Rockwool, Min 40Kg/m3.

Cell Protection/Insulation Protecion

Incase of GI, Cold Rolled Hot Dip Galvanized Steel G90 comply to Z275, of Min Ga-24. For Stainless Steel, the grade will be as per requirement.

Casing Seam Lock Formed or Welded as per Smacna, depending on size and thciknesses. All corners, will be caluked with sealant.

ISO 7235 Test Specimen Setup

S o u n d A t t e n u a t o r

2

Product name

TUNE-S 200 100 900 600 900

Silencer data

78

31

59dB

dB

dB

dB37

14

27

2831

29

21

4660

32

25

3042

29

38

7979

28

34

51547164

46 38 35

144 7

7868 68Hz 63 125 250 500 1k 2k 4k 8k NC

TUNE has a conventional design with dimensions that not exceed thecorresponding connection dimensions. The silencer can be manufacturedin all standard duct sizes. Design Has an outer sheet casing of trapezoidalcorrugated sheet metal for stability and reduced risk of natural oscillation.Is designed for low air resistance with baffle combinations that attenuateparticularly low-frequency noise well. The type of insulation material hasbeen developed to provide good noise properties, low weight and to becleanable. Meets the requirements of air tightness class C and pressureclass 2 according to EN 1507:2006. Is equipped with joining profile typeRJFP. Tools for dimensioning and planning To calculate the silencer, youcan use our IT-program DIMsilencer, where baffle distance, width andheight can be optimized for the best performance.

Description

Silencer

Supply

Flow [l/s]1500 29

P r e s s u r e [Pa]

Label

Placement

Attenuation

Sound generation

Lw after silencer

Lw before silencerWidth, aHeight, bSplitter info Bt/BdLength (L1): 900

200/100600900

SOFTWARE FOR CALCULATING NOICE IN VENTILLATION SYSTEM, WHICH SUGGESTS MODELS AND SIZES BASED ON THE INPUTS:Sharqawi Factory uses a very sophesticated Software DIM Sielncer, developed by Lindab, for sound attenuator selection .

In order to make the calculation and selection of sound attenuator for fans, the following are required.

1 Fan(AHU,PAC) sound data @ octave band frequencies (I.e.SPL@ 63 Hz, 125 Hz, 250 Hz up to 8 KHz),

2 HVAC Shop Drawings clearly identifying duct sizes, air outlet sizes and airflow across each air outlet.

3 Required NC, Db or insertion loss.4 Maximum allowed pressure drop.5 Maximum face velocity accepted.

Using all the above Data, Our trained Engineers on the Software, will make the calculation and selection of sound attenuator.

To select Sound attenuator for generator rooms, the requirements are different.

1 Radiator Cooling air flow rate2 Static Pressure/Resistance for radiator fan3 Required Sound level (NC level) outside the generator

room

Below shows one of the Example of calculation and size selection report printed from Dim silencer Software.

SAMPLERoom calculation Space

1/17/2019

DIMsilencer 6.0Plant nr.JEDDAH

5.0 x 5.0 x 2.8 m

35

normal

25 m² / 70m³

0.7 s

Area / Volume

Room type, attenuation

L x B x H

Allowed sound pressure level Reverberation time (Ts):

Room attenuation

Sound pressureSupply NC

Exhaust

Other noise source

Actual sound pressure level

29

0

0

29

NC

NC

NC

Supply

63 125 250 500 1k 2k 4k 8kResult Supply [dB] Exhaust [dB] Other noise source [dB] :

63 125 250 500 2k 4k 8k 63 125 250 500 1k 2k 4k 8k

8121725353651440 0 0 0 0 0 0 01

4 4 4 4 4 4 4 440 47 32 31 21 13 8 4

44 51 36 35 25 17 12 8

Lw 1 device + Number of soundsources

Lw all - A t t e n u a t i o n

Actual sound pressure level

Lp total

10 0 0 0 0 0 0 0

000000000 0 0 0 0 0 0 0

000 0

0000000

0 0 0 0 0

0 000000000 0 0 0 0 0 0 0

000 0

0000000

0 0 0 0 0

40 47 32 31 21 13 8 4

ea. ea. ea.

SalesmanSHARQAWI FACTORY

CustomerSHARQAWI FACTORY

NC

(Q=2 r=1.0) (Q=2 r=1.0) (Q=2 r=1.0)1k

6.0 dB

Room dataSAMPLE SELECTIONNote

[Pa]Flow Pressure dr

Attenuation [dB]63 125 250 500 1k 2k 4k 8k

Sound generation [dB]63 125 250 500 1k 2k 4k 8k [NC]

SupplyLabel Product name

[l/s]63 125 250 500 1k 2k 4k 8k [NC]Lw after [dB]

AHU-01 1500 0 0 0 0 0 0 0 0 0 68 79 70 82 82 63 40 8249 68 79 70 82 82 63 49 40 82LBXR 900 600 900Bend 1500 0 0 1 2 3 3 3 3 3 21 15 7 0 0 0 0 40 68 78 68 79 79 60 46 37 78

TUNE-S 200 100 900 600 900Silencer 1500 29 4 7 14 28 38 32 21 14 46 38 35 34 29 25 27 3129 64 71 54 51 42 30 31 28 59LKR 900 600 2500Duct 1500 0 2 2 1 0 0 0 0 0 26 25 24 22 21 20 0 2110 62 69 54 50 41 30 30 28 57LBXR 900 600 900Bend 1500 0 0 1 2 3 3 3 3 3 21 15 7 0 0 0 0 40 62 68 52 47 38 27 27 25 56LKR 900 600 3000Duct 1500 0 2 2 1 0 0 0 0 0 26 25 24 22 21 20 0 2110 60 66 51 47 38 28 27 25 54LBXR 900 600 900Bend 1500 0 0 1 2 3 3 3 3 3 21 15 7 0 0 0 0 40 60 65 49 44 35 25 24 22 52

LTRORRect Tee 400 0 6 6 6 6 6 6 6 6 35 29 21 13 3 -7 -32 6-19 54 59 43 38 29 19 18 16 44LKR 300 300 4200Duct 400 0 1 1 1 0 0 0 0 0 28 27 26 24 23 22 2 2312 53 58 42 38 30 24 19 16 43LBXR 300 300 300Bend 400 0 0 0 1 2 3 3 3 3 28 24 19 13 6 0 0 60 53 58 41 36 27 21 16 13 43

LKA-400Terminal 150 9 10 7 6 1 2 4 4 5 33 30 23 15 12 -4 -23 10-15 44 51 36 35 25 17 12 8 34

Sound attenuator model selection from Dim silencer software.

DescriptionTUNE has a conventional design with dimensions that not exceed the corresponding connection dimensions. The silencer can be manufactured in all standard duct sizes.

Design

Rectangular straight silencer from the TUNE series. TUNE-S is built with the splitter TUNE-A. The silencer is manufactured with the frame of galvanized sheet and stone wool absorption material.

The TUNE-S is availabe with splitter width 100 and 200 mm. Silencer is equiped with joining profile RJFP.

To calculate the silencer, you can use our IT-program lindQST or DIMsilencer, where splitter distance, length and height can be optimized for the best performance.

Testerd according to ISO 7235 standard.

Rectangular straight silencer

TUNE-S

Order code

Dimensions

Product Tune-S aaa bbb cccc dddd eeee ffTUNE-S

Splitter width (B) in mm100 or 200 mm

Splitter distance (S) in mmCalculate - see text

Width (a) in mmMin. - Max. 2400 - 400 mm

Height (b) in mmMin. - Max. 2400 - 200 mm

Length (l) in mmMIn. - Max. 2550 - 550 mm

Connection typee.g. RJFP 30 ,20 or 40

Example: TUNE-S - 1550 - 900 - 1200 - 200 - 200 - RJFP30

The max. height can be increas ed by building two splitters on top of each other.

a

b

lsplitterl

B S ½S

l - 50 = lsplitter (length of splitter).

b = Inner hight of TUNE-S.

The splitter height is b - 5 mm, to fit into duct.

Standard lengths (l) : 2550 ,2050 ,1550 ,1050 ,550 mm.(Shown in tables on next page).

Standard heights (b) : 1200 ,900 ,600 ,300 mm.

Special materials and sizes, please contact Lindab sales.

Other lengths and heights are available. See min. - max. dimensions in order code. Note that you can exceed the max. dimensions by building together several TUNE-S silencers.

S o u n d A t t e n u a t o r

3

Rectangular straight silencer

TUNE-SRectangular straight silencer

TUNE-STechnical data Technical data

[m/s]

Pressure loss

TUNE-S with splitter width (B) = 100(S) is distance between splitters

0

20

40

60

80

100

120

140

160

0 1 2 3 4 5 6 7 8 9 10

[Pa]

S = 60l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

S = 100l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

S = 140l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

TUNE-S with splitter width (B) = 200(S) is distance between splitters

0

20

40

60

80

100

120

140

160

0 1 2 3 4 5 6 7 8 9 10

[Pa]

[m/s]

S = 60l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

S = 100l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

S = 140l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

TUNE-S silencers

Splitter Width (B) = 100Splitter distance (S) = 60 mm

Splitter Width (B) = 100Splitter distance (S) = 100 mm

Splitter Width (B) = 100Splitter distance (S) = 140 mm

NB. Max. attenuation specified is 50 dB in the tables above.

The pressure loss Δp in Pa can be calculated from the pres-sure value ξ: Δp = 0,6 × v2 × ξ , where (v) is the velocity on the face area of the silencer.

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 1 4 7 14 25 27 21 16 4,3

1050 2 6 13 23 44 48 32 22 5,4

1550 4 8 19 31 50 50 43 29 6,5

2050 5 11 25 40 50 50 50 35 7,6

2550 7 13 32 48 50 50 50 41 8,7

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 1 2 5 11 20 17 13 10 1,6

1050 2 4 9 18 34 30 19 13 2,1

1550 3 5 13 24 49 43 26 17 2,5

2050 4 6 17 31 50 50 32 21 2,9

2550 5 8 22 37 50 50 39 25 3,3

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 1 2 4 10 17 12 9 7 0,9

1050 2 3 7 15 29 22 14 10 1,1

1550 3 4 10 21 41 32 18 12 1,3

2050 3 5 14 26 50 41 23 15 1,5

2550 4 6 17 32 50 50 28 18 1,7

Splitter Width (B) = 200Splitter distance (S) = 60 mm

Splitter Width (B) = 200Splitter distance (S) = 100 mm

Splitter Width (B) = 200Splitter distance (S) = 140 mm

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 2 6 12 24 36 38 28 18 17,5

1050 4 12 20 42 50 50 44 24 20,3

1550 5 17 27 50 50 50 50 31 23,2

2050 7 22 34 50 50 50 50 37 26,1

2550 8 27 41 50 50 50 50 44 29,0

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 2 5 10 19 24 20 15 11 5,7

1050 3 8 15 33 44 36 23 15 6,6

1550 4 12 21 46 50 50 32 19 7,5

2050 5 16 27 50 50 50 40 23 8,5

2550 6 20 33 50 50 50 49 27 9,4

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 1 4 8 16 18 14 10 8 2,7

1050 2 7 13 28 33 24 15 11 3,2

1550 3 10 18 39 49 35 21 14 3,6

2050 4 13 23 50 50 46 26 17 4,0

2550 5 16 28 50 50 50 32 20 4,5

S o u n d A t t e n u a t o r

4

Rectangular straight silencer

TUNE-SRectangular straight silencer

TUNE-STechnical data Technical data

[m/s]

Pressure loss

TUNE-S with splitter width (B) = 100(S) is distance between splitters

0

20

40

60

80

100

120

140

160

0 1 2 3 4 5 6 7 8 9 10

[Pa]

S = 60l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

S = 100l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

S = 140l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

TUNE-S with splitter width (B) = 200(S) is distance between splitters

0

20

40

60

80

100

120

140

160

0 1 2 3 4 5 6 7 8 9 10

[Pa]

[m/s]

S = 60l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

S = 100l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

S = 140l = 1,0 m

l = 1,5 m

l = 2,0 m

l = 2,5 m

TUNE-S silencers

Splitter Width (B) = 100Splitter distance (S) = 60 mm

Splitter Width (B) = 100Splitter distance (S) = 100 mm

Splitter Width (B) = 100Splitter distance (S) = 140 mm

NB. Max. attenuation specified is 50 dB in the tables above.

The pressure loss Δp in Pa can be calculated from the pres-sure value ξ: Δp = 0,6 × v2 × ξ , where (v) is the velocity on the face area of the silencer.

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 1 4 7 14 25 27 21 16 4,3

1050 2 6 13 23 44 48 32 22 5,4

1550 4 8 19 31 50 50 43 29 6,5

2050 5 11 25 40 50 50 50 35 7,6

2550 7 13 32 48 50 50 50 41 8,7

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 1 2 5 11 20 17 13 10 1,6

1050 2 4 9 18 34 30 19 13 2,1

1550 3 5 13 24 49 43 26 17 2,5

2050 4 6 17 31 50 50 32 21 2,9

2550 5 8 22 37 50 50 39 25 3,3

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 1 2 4 10 17 12 9 7 0,9

1050 2 3 7 15 29 22 14 10 1,1

1550 3 4 10 21 41 32 18 12 1,3

2050 3 5 14 26 50 41 23 15 1,5

2550 4 6 17 32 50 50 28 18 1,7

Splitter Width (B) = 200Splitter distance (S) = 60 mm

Splitter Width (B) = 200Splitter distance (S) = 100 mm

Splitter Width (B) = 200Splitter distance (S) = 140 mm

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 2 6 12 24 36 38 28 18 17,5

1050 4 12 20 42 50 50 44 24 20,3

1550 5 17 27 50 50 50 50 31 23,2

2050 7 22 34 50 50 50 50 37 26,1

2550 8 27 41 50 50 50 50 44 29,0

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 2 5 10 19 24 20 15 11 5,7

1050 3 8 15 33 44 36 23 15 6,6

1550 4 12 21 46 50 50 32 19 7,5

2050 5 16 27 50 50 50 40 23 8,5

2550 6 20 33 50 50 50 49 27 9,4

Lengthlnommm

Insertion loss [dB] for centre frequency [Hz] Pressure value

ξ63 125 250 500 1K 2K 4K 8K

550 1 4 8 16 18 14 10 8 2,7

1050 2 7 13 28 33 24 15 11 3,2

1550 3 10 18 39 49 35 21 14 3,6

2050 4 13 23 50 50 46 26 17 4,0

2550 5 16 28 50 50 50 32 20 4,5

S o u n d A t t e n u a t o r

5

Dimensions and sound data

Circular straight silencer

SLU 50

Order code

DescriptionSLU 50 is a circular straight silencer with a connection diameter available between 63 - 400 mm. Nominal insulation thickness 50 mm. Attenuation material is mineral wool. The SLU's are made of strong outer spiral seemed tube and an inner tube made of sheet steel with small openings to be able to withstand mechanical cleaning and at the same time not interfere with the insertion loss.

The space between them is filled with mineral wool and a nonwoven cloth is inserted between inner tube and the attenuation material, to prevent fibers from the insulation getting into the duct system.

Tested according to ISO 7235 standard.

Special materials and sizes, please contact Lindab sales.

Technical data

10 50 100 500 000 1 000 5 000 10

qv

0.1

0.5

1

5

10

50

100

4

5

10

15

Ød1 [mm]

[m3/h]

[l/s]

∆pt [Pa/m]

80

63

100

125

160

200

250

50 100 500 000 1 000 5 000 10

v [m

/s]

3

2

315

400

Product SLU aaa bbbb 50SLU

Connection dim. Ød 1 nom400 - 63 mm

Length in mm ( l nom )

1200 - 300 mm

Nominal Insulation thickness

50 mm

Example: SLU - 50 - 600 - 80

l

Ød 1

Ød y

There is given max. attenuation values of 50 dB in the tableabove.

* Supplied with two loose couplings.

Ød1 nommm

lnommm

Attenuation [dB] for centre frequency [Hz]

Ødymm

lmm

mkg63 125 250 500 1k 2k 4k 8k

63 300 0 6 13 21 32 44 36 26 170 300 1,8 63 600 0 7 20 35 50 50 50 34 170 600 3,0 80 300 1 5 8 15 25 25 21 15 190 300 2,0 80 600 2 8 14 28 49 50 47 24 190 600 3,0 80 900 3 10 21 40 50 50 50 34 190 900 5,0 80 1200 4 13 27 50 50 50 50 43 190 1200 7,0

100 300 1 5 7 15 25 25 21 13 210 360 2,0 100 600 1 7 12 25 43 48 35 20 210 660 3,0 100 900 2 10 17 34 50 50 49 28 210 960 5,0 100 1200 3 12 22 44 50 50 50 35 210 1260 7,0 125 300 0 4 5 13 23 20 16 11 235 365 3,0 125 600 1 5 10 22 39 37 26 16 235 665 4,0 125 900 1 7 14 30 50 50 37 21 235 965 7,0 125 1200 2 9 18 39 50 50 47 26 235 1265 9,0 160 300 0 3 5 11 22 16 11 7 270 370 3,0 160 600 1 4 8 19 37 28 17 11 270 670 6,0 160 900 1 5 12 27 50 39 24 14 270 970 8,0 160 1200 2 6 15 35 50 50 30 17 270 1270 10,0 200 300 0 2 4 9 19 11 7 5 310 385 4,0 200 600 1 3 8 15 28 19 12 8 310 685 7,0 200 900 2 4 11 21 37 28 16 10 310 985 10,0 200 1200 2 5 14 27 46 36 21 13 310 1285 12,0 250 600 1 2 6 14 26 14 8 7 365 600 9,0 250 900 1 3 9 19 38 19 11 9 365 900 12,0 250 1200 2 4 11 24 50 24 13 11 365 1200 15,0 315 600 0 2 4 10 22 9 6 7 427 600 12,0 315 900 2 3 7 16 31 13 8 9 427 900 18,0 315 1200 2 3 8 20 39 16 9 10 427 1200 24,0 400 * 600 0 2 4 8 10 5 4 4 508 600 16,0 400 * 900 0 2 5 12 16 7 5 6 508 900 22,0 400 * 1200 0 2 7 16 20 9 6 7 508 1200 32,0

DescriptionSLU 100 is a circular straight silencer with a connection diameter available between 315 - 800 mm. For smaller sizes, see SLU 50.

Nominal insulation thickness 100 mm. Attenuation material is mineral wool. The SLU's are made of an outer spiral seemed tube and an inner tube made of perforated sheet steel. The space between them is filled with mineral wool and a fibre cloth is inserted between the perforated sheet metal and the attenuation material, to prevent damage to the insulation material and fibers from getting into the duct system.

Tested according to ISO 7235 standard.

Special materials and sizes, please contact Lindab sales.

Circular straight silencer

SLU 100

l

Ød

1

Ød

y

NPU

NPUNPU

Technical data

Order code

Dimensions and sound data

* Supplied with two loose couplings (Type NPU).

There is given max. attenuation values of 50 dB in the table above.

Ød1 nommm

lnommm

Attenuation [dB] for centre frequency [Hz]

Ødymm

lmm

mkg63 125 250 500 1k 2k 4k 8k

315 600 2 5 9 14 12 6 4 5 510 600 12,0 315 900 3 6 13 20 19 10 6 7 510 900 18,0 315 1200 4 8 16 27 25 15 9 10 510 1200 24,0 400 * 600 4 5 8 10 7 4 4 6 625 600 16,0 400 * 900 4 5 10 17 13 6 6 8 625 900 22,0 400 * 1200 6 6 13 24 18 8 7 10 625 1200 32,0 500 * 900 4 4 10 14 8 4 6 6 735 900 26,0 500 * 1200 3 5 11 21 12 6 7 9 735 1200 39,0 630 * 900 2 3 7 12 5 4 4 5 880 900 44,0 630 * 1200 2 4 8 17 7 4 5 7 880 1200 56,0 800 * 1200 2 3 8 11 5 4 5 6 1030 1200 69,0 800 * 1500 2 3 10 16 6 5 6 7 1030 1500 86,0

S o u n d A t t e n u a t o r

6

Dimensions and sound data

Circular straight silencer

SLU 50

Order code

DescriptionSLU 50 is a circular straight silencer with a connection diameter available between 63 - 400 mm. Nominal insulation thickness 50 mm. Attenuation material is mineral wool. The SLU's are made of strong outer spiral seemed tube and an inner tube made of sheet steel with small openings to be able to withstand mechanical cleaning and at the same time not interfere with the insertion loss.

The space between them is filled with mineral wool and a nonwoven cloth is inserted between inner tube and the attenuation material, to prevent fibers from the insulation getting into the duct system.

Tested according to ISO 7235 standard.

Special materials and sizes, please contact Lindab sales.

Technical data

10 50 100 500 000 1 000 5 000 10

qv

0.1

0.5

1

5

10

50

100

4

5

10

15

Ød1 [mm]

[m3/h]

[l/s]

∆pt [Pa/m]

80

63

100

125

160

200

250

50 100 500 000 1 000 5 000 10

v [m

/s]

3

2

315

400

Product SLU aaa bbbb 50SLU

Connection dim. Ød 1 nom400 - 63 mm

Length in mm ( l nom )

1200 - 300 mm

Nominal Insulation thickness

50 mm

Example: SLU - 50 - 600 - 80

l

Ød 1

Ød y

There is given max. attenuation values of 50 dB in the tableabove.

* Supplied with two loose couplings.

Ød1 nommm

lnommm

Attenuation [dB] for centre frequency [Hz]

Ødymm

lmm

mkg63 125 250 500 1k 2k 4k 8k

63 300 0 6 13 21 32 44 36 26 170 300 1,8 63 600 0 7 20 35 50 50 50 34 170 600 3,0 80 300 1 5 8 15 25 25 21 15 190 300 2,0 80 600 2 8 14 28 49 50 47 24 190 600 3,0 80 900 3 10 21 40 50 50 50 34 190 900 5,0 80 1200 4 13 27 50 50 50 50 43 190 1200 7,0

100 300 1 5 7 15 25 25 21 13 210 360 2,0 100 600 1 7 12 25 43 48 35 20 210 660 3,0 100 900 2 10 17 34 50 50 49 28 210 960 5,0 100 1200 3 12 22 44 50 50 50 35 210 1260 7,0 125 300 0 4 5 13 23 20 16 11 235 365 3,0 125 600 1 5 10 22 39 37 26 16 235 665 4,0 125 900 1 7 14 30 50 50 37 21 235 965 7,0 125 1200 2 9 18 39 50 50 47 26 235 1265 9,0 160 300 0 3 5 11 22 16 11 7 270 370 3,0 160 600 1 4 8 19 37 28 17 11 270 670 6,0 160 900 1 5 12 27 50 39 24 14 270 970 8,0 160 1200 2 6 15 35 50 50 30 17 270 1270 10,0 200 300 0 2 4 9 19 11 7 5 310 385 4,0 200 600 1 3 8 15 28 19 12 8 310 685 7,0 200 900 2 4 11 21 37 28 16 10 310 985 10,0 200 1200 2 5 14 27 46 36 21 13 310 1285 12,0 250 600 1 2 6 14 26 14 8 7 365 600 9,0 250 900 1 3 9 19 38 19 11 9 365 900 12,0 250 1200 2 4 11 24 50 24 13 11 365 1200 15,0 315 600 0 2 4 10 22 9 6 7 427 600 12,0 315 900 2 3 7 16 31 13 8 9 427 900 18,0 315 1200 2 3 8 20 39 16 9 10 427 1200 24,0 400 * 600 0 2 4 8 10 5 4 4 508 600 16,0 400 * 900 0 2 5 12 16 7 5 6 508 900 22,0 400 * 1200 0 2 7 16 20 9 6 7 508 1200 32,0

DescriptionSLU 100 is a circular straight silencer with a connection diameter available between 315 - 800 mm. For smaller sizes, see SLU 50.

Nominal insulation thickness 100 mm. Attenuation material is mineral wool. The SLU's are made of an outer spiral seemed tube and an inner tube made of perforated sheet steel. The space between them is filled with mineral wool and a fibre cloth is inserted between the perforated sheet metal and the attenuation material, to prevent damage to the insulation material and fibers from getting into the duct system.

Tested according to ISO 7235 standard.

Special materials and sizes, please contact Lindab sales.

Circular straight silencer

SLU 100

l

Ød

1

Ød

y

NPU

NPUNPU

Technical data

Order code

Dimensions and sound data

* Supplied with two loose couplings (Type NPU).

There is given max. attenuation values of 50 dB in the table above.

Ød1 nommm

lnommm

Attenuation [dB] for centre frequency [Hz]

Ødymm

lmm

mkg63 125 250 500 1k 2k 4k 8k

315 600 2 5 9 14 12 6 4 5 510 600 12,0 315 900 3 6 13 20 19 10 6 7 510 900 18,0 315 1200 4 8 16 27 25 15 9 10 510 1200 24,0 400 * 600 4 5 8 10 7 4 4 6 625 600 16,0 400 * 900 4 5 10 17 13 6 6 8 625 900 22,0 400 * 1200 6 6 13 24 18 8 7 10 625 1200 32,0 500 * 900 4 4 10 14 8 4 6 6 735 900 26,0 500 * 1200 3 5 11 21 12 6 7 9 735 1200 39,0 630 * 900 2 3 7 12 5 4 4 5 880 900 44,0 630 * 1200 2 4 8 17 7 4 5 7 880 1200 56,0 800 * 1200 2 3 8 11 5 4 5 6 1030 1200 69,0 800 * 1500 2 3 10 16 6 5 6 7 1030 1500 86,0

S o u n d A t t e n u a t o r

7

* Supplied with two loose couplings (NPU).

Technical data

Dimensions and sound data

Circular straight silencer with baffle

SLBU 100

Order code

DescriptionCircular straight silencer provided with a 100 mm thick baffle.

Insulation thickness 100 mm.

This gives very good attenuation across the entire range. Used where very good attenuation is needed and SLU 100 is not enough.

Specially suitable for large dimensions.

Tested according to ISO 7235 standard.

Special materials and sizes, please contact Lindab sales.

S o u n d A t t e n u a t o r

8

We certify that, Sharqawi Air Distribution Systems Co. factory,

produces Sound Attenuator SLL (SLU),SLBL (SLBU)and TUNE-S as per Specs of Dim silencer software, which have

been tested as per EN-7235 standard in Lindab AcousticLaboratory, Lindab competence center, Farum,

Denmark.

Sharqawi Air Distribution Systems Co. factory, hasbeen formally awarded permission to Use DIMsilencer

Software for calculation & selection of Sound attenuators& print the results for silencers mentioned above.

CERTIFICATE

Tuomas VeijalainenProduct Manager, Acoustic

Lindab Group, Indoor Climate Solutions.

lindab I we simplify construction

CERTIFICATE OF APPROVAL

S o u n d A t t e n u a t o r

9

• On Time Delivery • According to Standard• Customization • Quality • Cooperation

008 SAT CATALOG REV 00JANUARY 2019

SOUND ATTENUATOR