universal standard engine exhaust silencers & · pdf filerotary positive blower silencers...

Universal Standard Engine Exhaust Silencers & Accessories Version 4.2

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Method 1You must know the following information:

A exhaust flow rate (CFM)

B silencer inlet size (ft2)

C level of silencing required

Calculate exhaust gas velocity by dividingthe flow rate by the pipe area:

Reference the pressure drop tables in thesilencer spec sheets located on pages 2.3and 2.7. Using the calculated exhaust gasvelocity, find the corresponding estimatedpressure drop on the table. If you haveselected a silencer that achieves yoursilencing level requirements at an acceptablepressure drop level, you have identified thesilencer that is right for you!

What Else Should I Know?Universal brand exhaust silencers provideoptimum performance for all applications byoffering silencers crafted for four differentattenuation grades. Due to the variability ofdifferent applications, performance levelsare most accurately shown as broad range“expected attenuation bands,” which arebased upon typical conditions. These bandswill not define the exact insertion loss for aspecific application, since insertion loss isinfluenced by engine size, type, speed andunsilenced noise levels (see product specsheets for attenuation, back pressure anddesign details).

NotesKeep in mind that silencers are not designedto support their weight from the inlet oroutlet tube, or support other components ofthe exhaust system, such as stacks. For themost efficient operation of all silencing units,proper mounting attachments are required.

GeneralInformation

Standard Engine Silencers

exhaust flow rate (CFM)

silencer inlet pipe area (ft2)

Exhaust Flow Rate EstimationIf exhaust flow rate is unavailable, estimatethrough the following equation:

D = displacement in in3

E = 0.85 efficiency for naturally aspirated engines

= 1.2 for engines with scavenging blower= 1.4 for turbo-charged engines

T = exhaust temperature; if unknown, use 900°F for diesel and 1,200°F for gas engines

C = 1.0 (two-cycle engine) or 2.0 (four-cycle engine)

estimated exhaust flow rate =

D (in3) � full load rpm � E � (T°� 460°)

C � 941,760

.0031

Inlet Pipe Area

(ft2)

.0055

.0085

.0123

.0218

.0341

.0491

.0668

.0873

.1363

.1963

.3491

.5454

.78541.0691.4381.7602.1802.640

.75/19.11.0/25.41.25/31.81.5/38.12.0/50.82.5/63.53.0/76.23.5/88.94.0/101.65.0/127.06.0/152.48.0/203.210.0/254.012.0/304.814.0/355.616.0/406.418.0/457.220.0/508.022.0/558.8

4173

113163288450650880

1,1601,8102,6004,6007,200

10,20014,00018,00023,00028,40034,400

356398

142250380565770

1,0001,5802,2503,9006,2008,800

12,00015,50019,80024,30029,500

295280

117206325470640830

1,2901,8703,3405,2007,500

10,20013,70016,80020,90025,300

————————790

1,2901,7703,1504,9507,1009,700

13,00016,00019,70024,000

Pipe Dimension

(in/mm)

IndustrialSilencer

ResidentialSilencer

CriticalSilencer

HospitalSilencer

Quick Selection Table

Note: Find the lowest flow rate greater than or equal to the engine flow rate at the required silencing level. Exhaustflow rates are based on end-in end-out silencers. Refer to product spec sheets when determining side-in or middleside-in back pressure. Velocity should not exceed 15,000 ft/min regardless of the allowable back pressure(10,000 ft/min for spark arresting silencers).

Method 2If your pressure drop requirement is 1.0" Hg(approximately 13.62" H2O) or less andexhaust flow rates are known, use the quickselection table below to select the mostappropriate silencer without performing anycalculations at all!

Use one of two methods outlined belowto determine which silencing solution isoptimal for your application.

Regardless of the method you choose, theengine’s exhaust flow rate (CFM) may be amystery. If this is the case, use the abovetitled equation Exhaust Flow RateEstimation. After estimating the exhaustflow rate, proceed with Method 1 or 2.

Silencer recommendations followingMethod 2 are based on 1" Hg restriction andare only estimations. Consideringuncontrolled variables such as pipingsystems, tail pipe loss, suddenexpansion/contraction, flex, etc., it isrecommended that you select a unit onesize larger or a low pressure unit (page 2.8)if either (a) the back pressure exceeds 1" Hgacross the silencer, or (b) the back pressureis more than 50% of the allowable backpressure for the exhaust system (use thesmaller of the two).

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ProductSpecificationsStandard Engine Silencers

12–18 dB 18–25 dB 25–35 dB 35–42 dB 28 dB 34 dB 25 dB

minimum moderate maximum maximum moderate moderate tomaximum

moderate tomaximum

medium to high

4"–22" 4"–22" 4"–22" 4"–14" 4"–22" 4"–22" 4"–22"

• • • • • •

• • • • • •

• • • •

• • •

aluminizedsteel*

aluminized/mild steel*

mild steel*

aluminizedsteel*


mild steel*

aluminizedsteel*



aluminizedsteel*



aluminizedsteel*


mild steel*

aluminizedsteel*


mild steel*

aluminizedsteel*



low tomedium low low medium

to highlow to

mediumlow to

medium

Residential Critical Hospital LPD-1 LPD-2 Space Saver

Attenuation Level

Silencing Required

Ambient Noise

Type 1 End-in,End-out

•Slotted Pipe End

• • • •Pipe Threads

• • • • • • •Flanged

Type 2 Side-In,Side-Out

Type 3 Side-In, End-Out

• • • • •Type 4 Middle Side-In, End-Out

Double-Wrapped Body

Companion Flanges Offered

Up to 26" O.D.

26" to 36" O.D.

Greater than 36" O.D.

Industrial

Application

Fitting

Construction

“A” Mounting Flange:Standard in sizes 4" to 22". Drillingmatches 125/150# ASA standard.

“B” Male Pipe Threads:NPT ends offered in sizes 4" and smaller.

“S” Slotted Pipe Ends:Slotted ends offered in sizes 2" through 6".

Drains are standard on all models with a 9"O.D. or larger. Models 26" or smaller have acoat of high heat-resistant paint. Modelslarger than 26" O.D. have a rust inhibitingprimer under high heat-resistant paint.Maximum operating temperature is 1,250°Ffor aluminized units. Heat-resistant paintmaintains its properties up to 900°F onaluminized steel and 1,100°F on mild steel.

*Also available in stainless steel which provides exceptional resistance to corrosion and has a maximum operatingtemperature of of 1,500°F.

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40

31.5 63 125 250 500

51015

0

20253035

Octave Band Center Frequency, Hz

Insertion Loss, dB

Typical Attenuation Curves,Standard and Puck-Style Units

1K 2K 4K 8K

24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

4

0

8

12

16

20

Exhaust Gas Velocity in Thousands (ft./min.)

Estimated Pressure Drop

(Inches of Water)

Pressure Drop, Standard Units

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB

1K 2K 4K 8K

24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

4

0

8

12

16

20



(Inches of Water)

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB

1K 2K 4K 8K

24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

4

0

8

12

16

20



(Inches of Water)

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB

1K 2K 4K 8K

24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

4

0

8

12

16

20



(Inches of Water)

ProductPerformance


Residential Grade

Critical Grade

Hospital Grade

Industrial Grade

Note: When figuring pressure drop for side or middle side inlet, add 3" H2O to back pressure shown on curve.

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Puck-StyleStandard Engine Silencers

L

Y

P

N

D

K

P

LY

P

D

C

J/2C/2

K

N

LY

P

D

C

J

J/2C/2

K

A

A

N

“Puck”-style silencers are low-profilesilencers that not only fit in the smallestenclosures, but are also perfect for portablepower, marine, or other applications where a“tight fit” is a concern. The single inletmodels are available in residential, criticaland hospital attenuation grades. Critical andhospital models also offer a low skintemperature (LST) design for exceptionallysmall compartments and enclosures to keepradiant heat to a minimum. The LSTconfiguration incorporates an extra layer ofpacked acoustic/thermal insulation thatreduces heat and noise, eliminating the needfor expensive external wraps. The aluminizedsteel designs far outperform the comparablypriced carbon steel competition by offeringhigher corrosion resistance, greatermaximum operating temperatures, lessweight and an overall longer silencer life.

Single Inlet

LY

P

D

C

J

J/2C/2

K

A

A

N

P

D

JJ/2

K

A A

LY

N

Dual Inlet Type 1

Dual Inlet Type 3Dual Inlet Type 4

Dual Inlet Type 2

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PartNumber P A N D K Y L C J Weight

Criti

cal

Hosp

ital

47040F47050F47060F47080F47082F47084F47086F47088F47099F48040F48050F48060F48080F48082F48084F48086F48088F48099F

4.05.06.08.0

10.012.014.016.018.04.05.06.08.0

10.012.014.016.018.0

——————————————————

4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.0

28.029.033.045.052.062.064.474.484.632.032.038.052.059.070.070.075.086.0

18.018.520.526.530.035.036.241.246.320.020.023.030.033.539.039.041.547.0

8.59.09.8

10.512.013.015.516.517.59.09.59.8

10.512.013.015.818.019.0

13.014.015.517.020.022.027.029.031.014.015.015.517.020.022.027.532.034.0

——————————————————

——————————————————

125160215375565800955

1,3101,630

170195276550756

1,0051,1441,3641,755

Single Inlet, Low Skin Temperature (LST)

Single Inlet

PartNumber P A N D K Y L C J Weight

Resi

dent

ial

Criti

cal

Hosp

ital

42040F42050F42060F42080F42082F42084F42086F42088F42099F43040F43050F43060F43080F43082F43084F43086F43088F43099F44040F44050F44060F44080F44082F44084F44086F44088F44099F

4.05.06.08.0

10.012.014.016.018.04.05.06.08.0

10.012.014.016.018.04.05.06.08.0

10.012.014.016.018.0

———————————————————————————

4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.0

20.021.024.032.038.045.047.054.062.026.027.031.043.050.060.062.472.482.630.030.036.050.057.068.068.073.084.0

14.014.516.020.023.026.527.531.035.017.017.519.525.529.034.035.240.245.319.019.022.029.032.538.038.040.546.0

7.08.08.89.5

11.012.014.515.516.57.58.08.89.5

11.012.014.515.516.58.08.58.89.5

11.012.014.817.018.0

10.012.013.515.018.020.025.027.029.011.012.013.515.018.020.025.027.029.012.013.013.515.018.020.025.530.032.0

———————————————————————————

———————————————————————————

6580

100185280415545660825110140190355515710855

1,1801,450

146175235492672908

1,0391,2381,597


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PartNumber Fits Engine Silencer

Type P A N D K Y L C J Weight

431CA684F431CA884F431CB886F431CB086F431CB888F431CB088F431CC886F431CC086F431CC888F431CC088F431CC899F431CC099F433MA580F433MA582F432MB682F432MC682F432MD684F432ME682F432MF684F433MG684F433MH686F433MJ686F434KA086F434KA088F441CA684F441CA884F441CB886F441CB086F441CB888F441CB088F441CC886F441CC086F441CC888F441CC088F441CC899F441CC099F443MA580F443MA582F442MB682F442MC682F442MD684F442ME682F442MF684F443MG684F443MH686F443MJ686F444KA086F444KA088F

CAT 3508BCAT 3508BCAT 3512BCAT 3512BCAT 3512BCAT 3512BCAT 3516CAT 3516CAT 3516CAT 3516CAT 3516CAT 3516Cummins VTA28-G5Cummins VTA28-G5Cummins QST30-G1-2Cummins QST30-G3Cummins QST30-G3-5Cummins KTA38-G3Cummins KTA38-G3-5Cummins KTA50-G3Cummins KTA50-G3-4Cummins KTA50-G9DD/Kohler 12V 4000DD/Kohler 12V 4000CAT 3508BCAT 3508BCAT 3512BCAT 3512BCAT 3512BCAT 3512BCAT 3516CAT 3516CAT 3516CAT 3516CAT 3516CAT 3516Cummins VTA28-GCummins VTA28-G5Cummins QST30-G1-2Cummins QST30-G3Cummins QST30-G3-5Cummins KTA38-G3Cummins KTA38-G3-5Cummins KTA50-G3Cummins KTA50-G3-4Cummins KTA50-G9DD/Kohler 12V 4000DD/Kohler 12V 4000

111111111111332222233344111111111111332222233344

12.012.014.014.016.016.014.014.016.016.018.018.08.0

10.010.010.012.010.012.012.014.014.014.016.012.012.014.014.016.016.014.014.016.016.018.018.08.0

10.010.010.012.010.012.012.014.014.014.016.0

6.08.08.0

10.08.0

10.08.0

10.08.0

10.08.0

10.05.05.06.06.06.06.06.06.06.06.0

10.010.06.08.08.0

10.08.0

10.08.0

10.08.0

10.08.0

10.05.05.06.06.06.06.06.06.06.06.0

10.010.0

4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.0

60.060.062.462.472.472.462.462.472.472.482.682.643.050.050.050.060.050.060.060.062.462.462.472.468.068.068.068.073.073.068.068.073.073.084.084.050.057.057.057.068.057.068.068.068.068.068.073.0

34.034.035.235.240.240.235.235.240.240.245.345.325.529.029.029.034.029.034.034.035.235.235.240.238.038.038.038.040.540.538.038.040.540.546.046.029.032.532.532.538.032.538.038.038.038.038.040.5

12.012.014.514.515.515.514.514.515.515.516.516.59.5

11.011.011.012.011.012.012.014.514.514.515.512.012.014.814.817.017.014.814.817.017.018.018.09.5

11.011.011.012.011.012.012.014.814.814.817.0

20.020.025.025.027.027.025.025.027.027.029.029.015.018.018.018.020.018.020.020.025.025.025.027.020.020.025.525.530.030.025.525.530.030.032.032.015.018.018.018.020.018.020.020.025.525.525.530.0

20.520.520.620.620.620.620.520.520.520.520.520.512.512.512.113.313.313.313.310.310.310.3——

20.520.520.620.620.620.620.520.520.520.520.520.512.512.512.113.313.313.313.310.310.310.3——

————

————————2.02.04.24.24.25.75.7

13.913.913.918.518.5————————————2.02.04.24.24.25.85.7

13.913.913.918.5

706704855863

1,1741,182

855863

1,1741,1801,4431,451

357513519519706519706706847847863

1,182904902

1,0391,0471,2321,2401,0471,0471,2321,2381,5901,598

494670676676904676904904

1,0311,0311,0471,240

Dual Inlet

Criti

cal

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431CA684S431CA884S431CB886S431CB086S431CB888S431CB088S431CC886S431CC086S431CC888S431CC088S431CC899S431CC099S433MA580S433MA582S432MB682S432MC682S432MD684S432ME682S432MF684S433MG684S433MH686S433MJ686S434KA086S434KA088S441CA684S441CA884S441CB886S441CB086S441CB888S441CB088S441CC886S441CC086S441CC888S441CC088S441CC899S441CC099S443MA580S443MA582S442MB682S442MC682S442MD684S442ME682S442MF684S443MG684S443MH686S443MJ686S444KA086S444KA088S

CAT 3508BCAT 3508BCAT 3512BCAT 3512BCAT 3512BCAT 3512BCAT 3516CAT 3516CAT 3516CAT 3516CAT 3516CAT 3516Cummins VTA28-G5Cummins VTA28-G5Cummins QST30-G1-2Cummins QST30-G3Cummins QST30-G3-5Cummins KTA38-G3Cummins KTA38-G3-5Cummins KTA50-G3Cummins KTA50-G3-4Cummins KTA50-G9DD/Kohler 12V 4000DD/Kohler 12V 4000CAT 3508BCAT 3508BCAT 3512BCAT 3512BCAT 3512BCAT 3512BCAT 3516CAT 3516CAT 3516CAT 3516CAT 3516CAT 3516Cummins VTA28-G5Cummins VTA28-G5Cummins QST30-G1-2Cummins QST30-G3Cummins QST30-G3-5Cummins KTA38-G3Cummins KTA38-G3-5Cummins KTA50-G3Cummins KTA50-G3-4Cummins KTA50-G9DD/Kohler 12V 4000DD/Kohler 12V 4000

111111111111332222233344111111111111332222233344

12.012.014.014.016.016.014.014.016.016.018.018.08.0

10.010.010.012.010.012.012.014.014.014.016.012.012.014.014.016.016.014.014.016.016.018.018.08.0

10.010.010.012.010.012.012.014.014.014.016.0

6.08.08.0

10.08.0

10.08.0

10.08.0

10.08.0

10.05.05.06.06.06.06.06.06.06.06.0

10.010.06.08.08.0

10.08.0

10.08.0

10.08.0

10.08.0

10.05.05.06.06.06.06.06.06.06.06.0

10.010.0

0.50.50.50.60.50.60.50.60.50.60.50.60.50.50.50.50.50.50.50.50.50.50.60.60.50.50.50.60.50.60.50.60.50.60.50.60.50.50.50.50.50.50.50.50.50.50.60.6

60.060.062.462.472.472.462.462.472.472.482.682.643.050.050.050.060.050.060.060.062.462.462.472.468.068.068.068.073.073.068.068.073.073.084.084.050.057.057.057.068.057.068.068.068.068.068.073.0

34.034.035.235.240.240.235.235.240.240.245.345.325.529.029.029.034.029.034.034.035.235.235.240.234.034.034.034.036.536.534.034.036.536.542.042.025.028.528.528.534.032.538.034.034.034.034.036.5

8.58.511.011.112.012.111.011.112.012.113.013.16.07.57.57.58.57.58.58.511.011.011.112.18.58.511.311.413.513.611.311.413.513.614.514.66.07.57.57.58.57.58.58.511.311.311.413.6

16.516.521.521.623.523.621.521.623.523.625.525.611.514.514.514.516.514.516.516.521.521.521.623.616.516.522.022.126.526.622.022.126.526.628.528.611.514.514.514.516.514.516.516.522.022.022.126.6

20.520.520.620.620.620.620.520.520.520.520.520.512.512.512.113.313.313.313.310.310.310.3——

20.520.520.620.620.620.620.520.520.520.520.520.512.512.512.113.313.313.313.310.310.310.3——

————————————2.02.04.24.24.25.75.7

13.913.913.918.518.5————————————2.02.04.24.24.25.75.7

13.913.913.918.518.5

700698847853

1,1661,172

847853

1,1661,1701,4351,441

352508513513700513700700841841853

1,172898896

1,0311,0371,2241,2301,0391,0371,2241,2281,5821,588

489665670670898670898898

1,0251,0251,0371,230

Dual Inlet, Flush Mount

Criti

cal

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471CA684F471CA884F471CB886F471CB086F471CB888F471CB088F471CC886F471CC086F471CC888F471CC088F471CC899F471CC099F473MA580F473MA582F472MB682F472MC682F472MD684F472ME682F472MF684F473MG684F473MH686F473MJ686F474KA086F474KA088F481CA684F481CA884F481CB886F481CB086F481CB888F481CB088F481CC886F481CC086F481CC888F481CC088F481CC899F481CC099F483MA580F483MA582F482MB682F482MC682F482MD684F482ME682F482MF684F483MG684F483MH686F483MJ686F484KA086F484KA088F

CAT 3508BCAT 3508BCAT 3512BCAT 3512BCAT 3512BCAT 3512BCAT 3516CAT 3516CAT 3516CAT 3516CAT 3516CAT 3516Cummins VTA28-G5Cummins VTA28-G5Cummins QST30-G1-2Cummins QST30-G3Cummins QST30-G3-5Cummins KTA38-G3Cummins KTA38-G3-5Cummins KTA50-G3Cummins KTA50-G3-4Cummins KTA50-G9DD/Kohler 12V 4000DD/Kohler 12V 4000CAT 3508BCAT 3508BCAT 3512BCAT 3512BCAT 3512BCAT 3512BCAT 3516CAT 3516CAT 3516CAT 3516CAT 3516CAT s3516Cummins VTA28-G5Cummins VTA28-G5Cummins QST30-G1-2Cummins QST30-G3Cummins QST30-G3-5Cummins KTA38-G3Cummins KTA38-G3-5Cummins KTA50-G3Cummins KTA50-G3-4Cummins KTA50-G9DD/Kohler 12V 4000DD/Kohler 12V 4000

111111111111332222233344111111111111332222233344

1212141416161414161618188

10101012101212141414161212141416161414161618188

1010101210121214141416

688

108

108

108

108

105566666666

1010688

108

108

108

108

105566666666

1010

4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.0

62.062.064.464.474.474.464.464.474.474.484.684.645.052.052.052.062.052.060.062.064.464.464.474.470.070.070.070.075.075.070.070.075.075.086.086.052.059.059.059.070.059.070.070.070.070.070.075.0

35.035.036.236.241.241.236.236.241.241.246.346.326.530.030.030.035.030.035.035.036.236.236.241.239.039.039.039.041.541.539.039.041.541.547.047.030.033.533.533.539.033.539.039.039.039.039.041.5

13.013.015.015.516.516.515.515.516.516.517.517.510.512.012.012.013.012.013.013.015.515.515.516.513.013.015.815.818.018.015.815.818.018.019.019.010.512.012.012.013.012.013.013.015.815.815.818.0

22.022.027.027.029.029.027.027.029.029.031.031.017.020.020.020.022.020.022.022.027.027.027.029.022.022.027.527.532.032.027.527.532.032.034.034.017.020.020.020.022.020.022.022.027.527.527.532.0

20.520.520.620.620.620.620.520.520.520.520.520.512.512.512.113.313.313.313.310.310.310.3——

20.520.520.620.620.620.620.520.520.520.520.520.512.512.512.113.313.313.313.310.310.310.3——

————————————2.02.04.24.24.25.75.7

13.913.913.918.518.5————————————2.02.04.24.24.25.75.7

13.913.913.918.518.5

796790955963

1,3041,312

955963

1,3041,3101,6231,631

377563569569796569796796947947963

1,3121,0001,0001,1441,1521,3581,3661,1521,1521,3581,3641,7481,756

552754760760

1,000760

1,0001,0001,1361,1361,1521,366

Dual Inlet, Low Skin Temperature (LST)

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2.9

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471CA684S471CA884S471CB886S471CB086S471CB888S471CB088S471CC886S471CC086S471CC888S471CC088S471CC899S471CC099S473MA580S473MA582S472MB682S472MC682S472MD684S472ME682S472MF684S473MG684S473MH686S473MJ686S474KA086S474KA088S481CA684S481CA884S481CB886S481CB086S481CB888S481CB088S481CC886S481CC086S481CC888S481CC088S481CC899S481CC099S483MA580S483MA582S482MB682S482MC682S482MD684S482ME682S482MF684S483MG684S483MH686S483MJ686S484KA086S484KA088S

CAT 3508BCAT 3508BCAT 3512BCAT 3512BCAT 3512BCAT 3512BCAT 3516CAT 3516CAT 3516CAT 3516CAT 3516CAT 3516Cummins VTA28-G5Cummins VTA28-G5Cummins QST30-G1-2Cummins QST30-G3Cummins QST30-G3-5Cummins KTA38-G3Cummins KTA38-G3-5Cummins KTA50-G3Cummins KTA50-G3-4Cummins KTA50-G9DD/Kohler 12V 4000DD/Kohler 12V 4000CAT 3508BCAT 3508BCAT 3512BCAT 3512BCAT 3512BCAT 3512BCAT 3516CAT 3516CAT 3516CAT 3516CAT 3516CAT 3516Cummins VTA28-G5Cummins VTA28-G5Cummins QST30-G1-2Cummins QST30-G3Cummins QST30-G3-5Cummins KTA38-G3Cummins KTA38-G3-5Cummins KTA50-G3Cummins KTA50-G3-4Cummins KTA50-G9DD/Kohler 12V 4000DD/Kohler 12V 4000

111111111111332223333344111111111111332222233344

12.012.014.014.016.016.014.014.016.016.018.018.08.0

10.010.010.012.010.012.012.014.014.014.016.012.012.014.014.016.016.014.014.016.016.018.018.08.0

10.010.010.012.010.012.012.014.014.014.016.0

6.08.08.0

10.08.0

10.08.0

10.08.0

10.08.0

10.05.05.06.06.06.06.06.06.06.06.0

10.010.06.08.08.0

10.08.0

10.08.0

10.08.0

10.08.0

10.05.05.06.06.06.06.06.06.06.06.0

10.010.0

0.50.50.50.60.50.60.50.60.50.60.50.60.50.50.50.50.50.50.50.50.50.50.60.60.50.50.50.60.50.60.50.60.50.60.50.60.50.50.50.50.50.50.50.50.50.50.60.6

62.062.064.464.474.474.464.464.474.474.484.684.645.052.052.052.062.052.062.062.064.464.464.474.470.070.070.070.075.075.070.070.075.075.086.086.052.059.059.059.070.059.070.070.070.070.070.075.0

35.035.036.236.241.241.236.236.241.241.246.346.326.530.030.030.035.030.035.035.036.236.236.241.239.039.039.039.041.541.539.039.041.541.547.047.030.033.533.533.539.033.539.039.039.039.039.041.5

9.59.5

12.012.013.013.012.012.013.013.014.014.07.08.58.58.59.58.59.59.5

12.012.012.013.09.59.5

12.312.315.515.512.312.315.515.516.516.57.08.58.58.59.58.59.59.5

12.312.312.315.5

18.518.523.223.525.525.523.523.525.525.527.527.513.516.516.516.518.516.518.518.523.523.523.525.518.518.524.024.028.528.524.024.028.528.530.530.513.516.516.516.518.516.518.518.524.024.024.028.5

20.520.520.620.620.620.620.520.520.520.520.520.512.512.512.113.313.313.313.310.310.310.3——

20.520.520.620.620.620.620.520.520.520.520.520.512.512.512.113.313.313.313.310.310.310.3——

————————————2.02.04.24.24.25.75.7

13.913.913.918.518.5————————————2.02.04.24.24.25.75.7

13.913.913.918.518.5

806806947953

1,2961,302

947953

1,2961,3001,6151,621

372558563563790563790790941941953

1,310994992

1,1361,1421,3501,3561,1441,1421,3501,3541,7401,746

547749754754994754994994

1,1301,1301,1421,356

Dual Inlet, Low Skin Temperature (LST), Flush Mount

Criti

cal

Hosp

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Type 1Standard Engine Silencers

41120P41125P41130P41135P41140*41150F41160F41180F41182F41184F41186F41188F41199F41121F41122F41220P41225P41230P41235P41240*41250F41260F41280F41282F41284F41286F41288F41299F41221F41222F41307P41310P41313P41315P41320P41325P41330P41335P41340*41350F41360F41380F41382F41384F41386F41388F41399F41321F41322F41440F41450F41460F41480F41482F41484F41486F

2.02.53.03.54.05.06.08.0

10.012.014.016.018.020.022.02.02.53.03.54.05.06.08.0

10.012.014.016.018.020.022.00.751.001.251.502.002.503.003.504.005.006.008.00

10.0012.0014.0016.0018.0020.0022.004.05.06.08.0

10.012.014.0

7.68.18.59.0

10.112.114.118.122.122.236.242.242.248.354.38.19.0

10.110.110.114.114.122.222.226.236.242.242.348.354.34.25.06.18.19.0

10.111.112.112.114.116.122.126.230.242.242.248.254.360.314.116.118.126.130.236.242.2

22.827.231.132.832.232.332.948.850.665.670.684.296.298.499.631.738.838.244.249.243.557.556.684.779.794.6

108.2108.2134.1135.521.323.427.530.740.847.249.551.358.363.572.078.779.7

104.8108.2156.2133.9159.6161.366.572.482.791.7

104.8130.6132.2

26.632.636.637.638.037.938.458.058.073.076.090.8

103.0104.0107.335.642.844.050.055.051.465.464.092.087.0

101.0115.0114.9140.1143.223.827.031.234.644.052.055.657.064.071.480.886.087.0

112.0115.0163.0139.9165.5166.872.080.090.098.9

112.0137.0138.9

————

2.302.803.40————————

1.251.502.752.062.313.613.60—————————

0.75——————

1.802.602.00————————

4.004.705.00————

————

2.302.803.40————————

1.251.502.752.062.313.613.60—————————

0.72——————

1.802.602.00————————

4.004.705.00————

1.82.72.72.42.92.82.84.63.73.72.73.33.42.83.91.92.02.92.92.94.04.03.73.73.73.23.43.33.03.91.31.81.81.91.62.43.12.32.94.04.43.73.73.63.43.43.13.32.82.83.83.73.63.43.23.4

PartNumber

ANominal

InletDiameter

BOutside

BodyDiameter

CBody

Length

DOverallLength

EOffsetto C/L

FOffsetto C/L

GInlet

Length

Indu

stria

lRe

side

ntia

lCr

itica

lHo

spita

l

*Specify “F” for flanged, “P” for pipe threads. Drains are standard on all silencers with a 9" body diameter or larger.Specifications are subject to change without notice; all dimensions are in inches.

End-In, End-Out DesignIndustrial Grade12–18 dB attenuation

Residential Grade18–25 dB attenuation

Critical Grade25–35 dB attenuation

Hospital Grade35–42 dB attenuation

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43120P43125P43130P43135P43140*43150F43160F43180F43182F43184F43186F43188F43199F43121F43122F43220P43225P43230P43235P43240*43250F43260F43280F43282F43284F43286F43288F43299F43221F43222F43320P43325P43330P43335P43340*43350F43360F43380F43382F43384F43386F43388F43399F43321F43322F43440F43450F43460F43480F43482F43484F43486F

2.02.53.03.54.05.06.08.0

10.012.014.016.018.020.022.02.02.53.03.54.05.06.08.0

10.012.014.016.018.020.022.02.02.53.03.54.05.06.08.0

10.012.014.016.018.020.022.04.05.06.08.0

10.012.014.0

7.68.18.59.09.0

12.114.118.122.222.236.242.242.348.354.38.19.0

10.110.110.114.114.122.222.226.236.242.142.248.354.39.0

10.111.112.112.114.116.122.126.230.242.242.248.254.360.314.116.118.126.230.236.242.2

22.427.730.632.832.830.430.648.450.665.670.684.296.297.999.631.738.838.244.249.243.557.656.684.779.894.7

108.2108.2134.1135.640.846.650.051.458.463.572.078.779.9

104.8108.2156.2134.0159.7161.366.672.482.691.8

104.8130.6132.2

24.530.233.635.435.434.234.553.254.369.373.887.599.6

101.2103.532.840.841.147.151.045.761.560.388.383.497.9

111.6111.5137.1139.442.449.352.854.261.267.476.482.383.4

108.4111.6159.6137.0162.9164.169.377.086.395.5

108.4133.8135.6

3.23.93.84.95.45.76.89.2

12.314.315.318.119.020.021.83.44.44.14.65.15.86.8

11.311.312.915.316.119.119.821.83.93.84.55.25.75.86.5

11.312.914.416.116.119.922.122.65.86.06.8

10.912.414.316.1

————————————————1.51.82.1—2.63.1————————————1.82.63.1————————4.04.75.0————

2.02.53.03.03.04.04.04.04.04.04.04.04.04.04.02.02.53.03.03.04.04.04.04.04.04.04.04.04.04.02.02.53.04.04.04.04.04.04.04.04.04.04.04.04.03.04.04.04.04.04.04.0

2.12.42.32.62.63.83.94.83.73.73.23.33.33.33.91.92.02.92.92.93.93.93.73.63.63.23.43.33.03.81.62.72.82.82.83.94.43.63.53.63.43.43.03.22.82.73.83.73.73.63.23.4

PartNumber

ANominal

InletDiameter

BOutside

BodyDiameter

CBody

Length

DOverallLength

EOffsetto C/L

FOffsetto C/L

GInlet

Length

HOutletLength

Indu

stria

lRe

side

ntia

lCr

itica

lHo

spita

l

*Specify “F” for flanged, “P” for pipe threads. Drains are standard on all silencers with a 9" body diameter or larger.Specifications are subject to change without notice; all dimensions are in inches.

F

G

H


Side-In, End-Out DesignIndustrial Grade12–18 dB attenuation




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44540F44550F44560F44580F44582F44584F44586F44640F44650F44660F44680F44682F44684F44686F44740F44750F44760F44780F44782F44784F44786F44840F44850F44860F44880F44882F44884F44886F

4.05.06.08.0

10.012.014.04.05.06.08.0

10.012.014.04.05.06.08.0

10.012.014.04.05.06.08.0

10.012.014.0

9.012.114.118.122.226.236.210.114.114.122.122.126.136.212.114.116.122.126.230.242.214.116.118.126.230.236.242.2

32.830.330.648.650.649.870.649.243.657.654.684.679.588.758.463.672.078.779.9

104.8108.266.572.482.691.9

104.8130.6132.2

35.434.234.553.354.353.473.852.147.561.558.388.283.491.961.267.576.482.383.4

108.4111.569.276.286.395.5

108.2133.9135.6

16.415.215.324.525.324.935.324.621.828.826.342.339.944.329.231.836.039.339.952.454.133.336.241.346.052.465.366.1

—————6.5——2.63.1————1.82.63.1————4.04.75.0———

—

3.04.04.04.04.04.04.03.04.04.04.04.04.04.03.04.04.04.04.04.04.03.04.04.04.04.04.04.0

2.63.83.94.73.73.63.22.93.93.93.73.63.63.22.83.94.43.63.53.63.32.73.83.73.63.43.33.4

PartNumber

ANominal

Inlet Diameter

BOutside

Body Diameter

CBody

Length

DOverallLength

EOffsetto C/L

FOffsetto C/L

GInlet

Length

HOutletLength

Drains are standard on all silencers with a 9" body diameter or larger.Specifications are subject to change without notice; all dimensions are in inches.

Indu

stria

lRe

side

ntia

lCr

itica

lHo

spita

l


Middle Side-In, End-Out DesignIndustrial Grade12–18 dB attenuation




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Low Pressure and Space Saver

Silencer PerformanceStandard Engine SilencersEx

haus

t Sile

ncer

s

31.5 63 125 250 500 1K 2K 4K 8K 16K 32KOctave Band Center Frequency, Hz

Typical Attenuation, dB

32

48

12

0

16202428

Typical Attenuation Graph24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

4

0

8

12

16

20

Exhaust Gas Velocity in Thousands (ft/min)


(Inches of Water)

Pressure Drop

31.5 63 125 250 500 1K 2K 4K 8K 16K 32KOctave Band Center Frequency, Hz

Typical Attenuation, dB32

48

12

0

16202428

24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

4

0

8

12

16

20



(Inches of Water)

40

31.5 63 125 250 500 1K 2K 4K 8K

51015

0

20253035


Insertion Loss, dB

24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

4

0

8

12

16

20



(Inches of Water)

Low Pressure Drop 2

Standard Space Saver

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB

1K 2K 4K 8K

24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

4

0

8

12

16

20



(Inches of Water)

Critical Grade Space Saver

Low Pressure Drop 1

Note: When figuring pressure drop for side or middle side inlet, add 4" H2O to back pressure shown on curve.

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Low Pressure DropStandard Engine Silencers

47200F47201F47202F47203F47204F47205F47206F47207F47208F47209F47210F47300F47301F47302F47303F47304F47305F47306F47307F47308F47309F47310F

4.05.06.08.0

10.012.014.016.018.020.022.04.05.06.08.0

10.012.014.016.018.020.022.0

14.116.118.126.230.236.236.242.248.348.354.316.118.122.226.230.136.242.242.248.354.360.3

48.048.055.060.085.080.095.0

108.0108.0133.8135.551.050.759.967.780.0

100.0120.0132.2133.9159.7169.3

PartNumber

ANominal

Inlet Diameter

BOutside

Body Diameter

CBody

Length

53.556.064.366.390.287.4

102.4114.8115.1143.0145.059.056.365.374.085.2

107.4125.8139.0141.0167.2176.3

DOverallLength

LPD-

1LP

D-2

47211F47212F47213F47214F47215F47216F47217F47218F47219F47220F47221F47311F47312F47313F47314F47315F47316F47317F47318F47319F47320F47321F

4.05.06.08.0

10.012.014.016.018.020.022.04.05.06.08.0

10.012.014.016.018.020.022.0

14.116.118.126.230.236.236.242.248.348.354.316.118.122.226.230.236.242.242.248.354.360.3

48.148.054.960.185.080.095.0

108.0107.9133.8135.651.049.959.967.880.0

100.0119.8132.2134.0159.7169.3

50.852.059.663.287.683.798.7

111.4111.5138.4140.355.053.162.670.982.6

103.7122.8135.6137.4163.4172.8

5.85.56.8

11.012.413.315.321.120.920.921.85.55.38.89.4

12.413.316.016.120.921.822.6

4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.0

2.74.04.73.12.63.73.73.43.64.64.74.03.22.73.12.63.73.03.43.63.73.5

PartNumber

ANominal

InletDiameter

BOutside

BodyDiameter

CBody

Length

DOverallLength

EOffsetto C/L

FInlet

Length

GOutletLength

LPD-

1LP

D-2

Specifications subject to change without notice; all dimensions are in inches.

F

G

End-In, End-Out Design

Side-In, End-Out Design

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14

Space Saver units are designed for side-inend-out mounting, although either end maybe used as an inlet. Using end-in side-outmay result in lower attenuation reductions.Condensate drains standard on all units.

Critical GradeSpace Saver


Slotted Connections

Standard Space Saver

*Refer to configuration B.

48820S

PartNumber

48825S48830S48835S48840S*48850S*48860S*

2.0 ID2.5 ID3.0 ID3.5 ID4.0 ID5.0 ID6.0 ID

2.0 OD

2.5 OD

3.0 OD

3.5 OD

4.0 ID5.0 ID6.0 ID

12.1112.1116.1116.1118.1120.1122.15

9.313.014.016.520.022.025.0

14.6520.41

21.3823.8927.4929.4936.28

—2.73.73.72.52.54.5

————1.53.04.0

4.04.04.04.04.04.04.0

13.119.019.922.426.028.033.0

3.96.05.95.96.06.08.0

A1Inlet

Diameter

A2Outlet

Diameter

BOutside Body

Diameter

CBody

Length

DOverallLength

EInlet Offset

to C/L

FOutlet Offset

to C/L

GInlet

Length

HLength

to Flange

IFlange

to Flange

4.66.57.08.2

10.011.012.5

JOffset Seamto Inlet C/L

Critical Grade Space Saver

*Refer to configuration B.

47820S

PartNumber

47825S47830S47835S47840S47850S47860S*

2.0 ID2.5 ID3.0 ID3.5 ID4.0 ID5.0 ID6.0 ID

2.0 OD

2.5 OD

3.0 OD

3.5 OD

4.0 ID5.0 ID6.0 ID

7.008.50

12.1112.1112.1116.1116.11

8.08.59.3

12.016.016.522.0

12.7013.3314.6519.4223.3223.8929.49

1.101.60

—2.702.403.702.50

——————1.5

4.04.04.04.04.04.04.0

12.012.513.118.021.922.428.0

4.04.03.96.05.95.96.0

A1Inlet

Diameter

A2Outlet

Diameter

BOutside Body

Diameter

CBody

Length

DOverallLength

EInlet Offset

to C/L

FOutlet Offset

to C/L

GInlet

Length

HLength

to Flange

IFlange

to Flange

4.04.34.66.08.08.2

11.0

JOffset Seamto Inlet C/L

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Standard EngineExhaust Spark ArrestorsStandard spark arrestors are designed foruniversal application with a minimum ofrestriction on the engine, and are ideal asadd-on units to existing exhaust systems.The arrestors’ light weight and small sizereduce stress and vibration to the rest ofthe exhaust system. Typical applicationsinclude logging and constructionequipment, agricultural machinery, over-the-road trucks, airport equipment, forestry, andmilitary vehicles.

How Can You Select the RightSpark Arrestor?If the diameter of the spark arrestor inlet isas large as the exhaust pipe, restrictiongenerally will be within engine guidelines.However, to be sure, check the exhaust CFMof the engine against the CFM rating of thespark arrestor. Some applications (e.g. turbo-charged and two-cycle diesel engines) mayrequire larger arrestors and an adapter tocomplete the installation.

49110U49115U49120B49125A49130A49135A49140A49150A49160A

1.051.502.002.503.003.504.005.006.00

1.251.502.002.633.133.634.135.136.13

4.244.245.625.626.627.628.509.62

12.12

3.23.16.48.6

10.212.014.616.022.0

5.95.9

11.012.814.917.621.224.027.0

1.31.42.02.02.03.03.44.02.0

80165295450660900

1,1801,8402,650

PartNumber

AInlet

Diameter

BOutside

Outlet Diameter

CBody

Diameter

DBody

Length

EOverallLength

FInlet

Length

CFMRating

All spark arrestors are qualified and tested for vertical and horizontal installations under the U.S. Forestry Service Standard 5100-1b. All inlets are slotted tube connections. Outlets areO.D. tubing. CFM rating is with a pressure drop of 1 PSI. All dimensions in inches.

Drain

Attenuation Level:5–9 dB

Spark ArrestorsNon-Silencing Units

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ProductSpecifications

Spark Arresting Engine Silencers

12–18 dB 18–25 dB 25–35 dB

minimum moderate maximum

•

aluminized steel ormild steel*












• •

Residential Critical

Attenuation Level

Silencing Required

horizontal orvertical



Orientation

Flanged

• • •Companion Flanges Offered

• • •Pipe Threads

Type 1

Type 2

Type 3

Type 4

Industrial

Application

Fitting

Construction

All Spark Arresting Exhaust Silencers can beinstalled horizontally or vertically. Efficiencyin either position can exceed 95% of ratedflow. Spark Arresting Exhaust Silencersreceive a coat of high heat-resistant siliconealuminum paint and/or a coat of high heatrust-inhibiting primer.

“A” Mounting Flange:Standard in sizes 4" to 22". Drillingmatches 125/150# ASA standard.Companion flanges available for 4" to 22".

“B” Male Pipe Threads:NPT ends offered in sizes .75" through3.5" (spark arresting silencer only).

*Also available in stainless steel which provides exceptional resistance to corrosion and has a maximum operatingtemperature of of 1,500°F.

See the standard silencer specification sheetfor finish details. Companion flanges areavailable in both cast iron threaded and mildsteel weld-on versions. They are packagedin kits containing nuts, bolts, and gasketsfor complete installation.

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SilencerPerformanceStandard Engine Silencers

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB

1K 2K 4K 8K

Critical

Residential

Typical Attenuation Curve24

0 1 2 3 4 5 6 7 8 9 10

4

0

8

12

16

20



(Inches of Water)

Pressure Drop

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB

1K 2K 4K 8K

Critical

24

0 1 2 3 4 5 6 7 8 9 10

4

0

8

12

16

20



(Inches of Water)

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB

1K 2K 4K 8K

Residential

24

0 1 2 3 4 5 6 7 8 9 10

4

0

8

12

16

20



(Inches of Water)

Residential

Critical

Industrial

Note: When figuring pressure drop for side or middleside inlet, add 4" H2O to back pressure shown on curve.

Note: When determining back pressure, velocityshould not exceed 10,000 ft/min regardless ofallowable back pressure. Specifications are subject tochange without notice.

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49325U49330U49335U49340U49350U49360U49380U49382U49384U49386U49388U49399U49321U49322U49415U49420U49425U49430U49435U49440U49450U49460U49480U49482U49484U49486U49540U49550U49560U49580U49582U49584U

2.53.03.54.05.06.08.0

10.012.014.016.018.020.022.01.52.02.53.03.54.05.06.08.0

10.012.014.04.05.06.08.0

10.012.0

9.009.009.00

10.1212.1214.1218.1222.1226.1236.2136.1842.1248.1254.127.008.129.63

10.1211.1212.1214.1216.1218.1222.1226.1236.2114.1216.1218.1222.1226.1230.18

21.824.323.823.728.331.548.352.667.772.280.692.2

103.9115.516.420.725.031.233.035.341.545.562.374.686.790.241.547.052.766.672.186.8

25.029.529.131.535.538.056.060.074.077.090.0

100.0109.9123.120.025.030.036.038.042.048.055.072.082.093.095.048.054.062.076.086.192.0

1.92.72.63.93.62.73.83.23.12.44.73.93.03.81.62.12.22.22.93.13.34.54.93.73.12.03.23.85.13.03.42.9

1.92.72.63.93.62.73.83.23.12.44.73.93.03.81.62.12.22.22.93.13.34.54.93.73.12.03.23.85.13.03.42.9

PartNumber

ANominal

Inlet Diameter

BOutside

Body Diameter

CBody

Length

DOverallLength

EInlet

Length

FOutletLength

Male pipe thread connections through 3.5", 4", and larger are 125/150# ASA drilled flanges. Drains are standard onall silencers with a 9" body diameter or larger. Side-in end-out configuration is designed for side inlet flow only.Unit cannot be run backward. All dimensions are in inches.

Indu

stria

lRe

side

ntia

lCr

itica

lStandard Spark Arresting Exhaust Silencersprovide high efficiency spark arresting andexceptional sound attenuation where firehazards must be eliminated and noise mustbe minimized. Three attenuation grades(industrial, residential, and critical) areavailable with spark arresting efficiencies

Type 1Spark Arresting Engine Silencers

exceeding 95%. Heavy gauge material andfully welded construction provide maximumstrength and longer service life in theseunits. Applications include stationary andportable gen sets, oil field equipment,propulsion engines on ships, and gascompression equipment.

End-In, End-Out Design

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Type 3Spark Arresting Engine Silencers

49640U49650U49660U49680U49682U49684U49686U49740U49750U49760U49780U49782U49784U49786U49840U49850U49860U49880U49882U49884U49886U

4.05.06.08.0

10.012.014.04.05.06.08.0

10.012.014.04.05.06.08.0

10.012.014.0

10.1212.1214.1218.1222.1226.1236.2112.1214.1216.1218.1222.1226.1236.2114.1216.1218.1222.1226.1230.1242.23

23.728.831.548.356.667.773.635.341.546.062.374.685.794.641.547.052.366.679.786.8

108.2

27.832.234.852.358.370.975.338.744.850.567.378.388.997.844.850.557.369.385.989.2

111.6

3.03.04.04.04.04.04.03.04.04.04.04.04.04.04.04.04.04.04.04.04.0

3.73.33.23.81.73.11.73.33.24.54.83.13.13.23.23.54.82.76.12.63.4

PartA

NominalInlet Diameter

BOutside

Body Diameter

CBody

Length

DOverallLength

EInlet

Length

FOutletLength

4.85.76.87.7

10.811.915.35.26.36.08.2

10.311.915.35.36.06.2

10.310.912.415.1

GOffsetto C/L

Indu

stria

lRe

side

ntia

lCr

itica

lStandard Spark Arresting Exhaust Silencersprovide high efficiency spark arresting andexceptional sound attenuation where firehazards must be eliminated and noise mustbe minimized. Three attenuation grades(industrial, residential, and critical) areavailable with spark arresting efficiencies

Male pipe thread connections through 3.5", 4", and larger are 125/150# ASA drilled flanges. Drains are standard onall silencers with a 9" body diameter or larger. Side-in end-out configuration is designed for side inlet flow only.Unit cannot be run backward. All dimensions are in inches.

exceeding 95%. Heavy gauge material andfully welded construction provide maximumstrength and longer service life in theseunits. Applications include stationary andportable gen sets, oil field equipment,propulsion engines on ships, and gascompression equipment.

Side-In, End-Out Design

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SilencerInsulation

BlanketsStandard Engine Silencers

3402 Woven Fiberglass Fabric

.008 Stainless Steel Mesh

Type E Fiberglass MatMounting FlangeInsulation Blanket

SilencerInsulation

Blanket

BenefitsInsulation blankets on your diesel exhaustsystems offer the following benefits:

reduces external system surfacetemperature by as much as 1,000°Fsilences sound by as much as 3 dBsubstantially reduces heat transfer intobuildings and enclosuresmulti-use; remove and reuse on otherdiesel exhaust systems

About the BlanketsUniversal brand insulated blankets areconstructed of three unique plies:

Inside Ply is made of a knitted stainlesssteel wire mesh

Middle Ply is a Type E fiberglass insulation*

Outer Ply is made from silicone-impregnated fiberglass fabric

High-temperature resistant silicone providessignificantly longer life and improvedresistance to abrasion, flexing wear, tearsand punctures. The heavy-duty inner-liningfabric is resistant to oils and acids/alkalis,as well as being flame retardant.

All blanket edges are machine-stitchedusing high grade fiberglass thread andfastened with permanently-mountedstainless steel hooks. The blankets are lacedin place “boot-style” with stainless steel tiewire, resulting in a custom-made “glove fit.”

*Type E fiberglass insulation is designed for insulationwithin high-temperature equipment. It is manufacturedfrom chopped fiberglass fibers and is free of resinousbinders, which enables its use in the high-temperatureranges. Type E insulation is flexible, lightweight andwill not compact under vibration.

SpecificationsEach insulation blanket conforms with therequirements of Military Specifications MIL-I-164-E, Type II.

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Silencer InsulationBlanketsStandard Engine Silencers

SilencerPart

Number

BlanketPart

Number

SilencerPart

Number

BlanketPart

Number

SilencerPart

Number

BlanketPart

Number

SilencerPart

Number

BlanketPart

Number

SilencerPart

Number

BlanketPart

Number

SilencerPart

Number

BlanketPart

Number

41120P41125P41130P41135P41140P41140F41150F41160F41180F41182F41184F41186F41188F41199F41121F41122F41220P41225P41230P41235P41240P41240F41250F41260F41280F71282F71284F41286F41288F41299F41221F41222F41307P41310P41313P41315P41320P41325P41330P41335P41340P41340F41350F41360F41380F41382F41384F41386F

901120P901125P901130P901135P901140P901140F901150F901160F901180F901182F901184F901186F901188F901199F901121F901122F901220P901225P901230P901235P901240P901240F901250F901260F901280F901282F901284F901286F901288F901299F901221F901222F901307P901310P901313P901315P901320P901325P901330P901335P901340P901340F901350F901360F901380F901382F901384F901386F

41388F41399F41321F41322F41440F41450F41460F41480F41482F41484F41486F43120P43125P43130P43135P43140P43140F43150F43160F43180F43182F43184F43186F43188F43199F43121F43122F43220P43225P43230P43235P43240P43240F43250F43260F43280F43282F43284F43286F43288F43299F43221F43222F43320P43325P43330P43335P43340P

901388F901399F901321F901322F901440F901450F901460F901480F901482F901484F901486F903120P903125P903130P903135P903140F903140F903150F903160F903180F903182F903184F903186F903188F903199F903121F903122F903220P903225P903230P903235P903240P903240F903250F903260F903280F903282F903284F903286F903288F903299F903221F903222F903320P903325P903330P903335P903340P

43340F43350F43360F43380F43382F43384F43386F43388F43399F43321F43322F43440F43450F43460F43480F43482F43484F43486F44540F44550F44560F44580F44582F44584F44586F44640F44650F44660F44680F44682F44684F44686F44740F44750F44760F44780F44782F44784F44786F44840F44850F44860F44880F44882F44884F44886F47200F47201F

903340F903350F903360F903380F903382F903384F903386F903388F903399F903321F903322F903440F903450F903460F903480F903482F903484F903486F904540F904550F904560F904580F904582F904584F904586F904640F904650F904660F904680F904682F904684F904686F904740F904750F904760F904780F904782F904784F904786F904840F904850F904860F904800F904882F904884F904886F907200F907201F

47202F47203F47204F47205F47206F47207F47208F47209F47210F47211F47212F47213F47214F47215F47216F47217F47218F47219F47220F47221F47300F47301F47302F47303F47304F47305F47306F47307F47308F47309F47310F47311F47312F47312F47313F47315F47316F47317F47318F47319F47320F47321F47820S47825S47830S47835S47840S47850S

907202F907203F907204F907205F907206F907207F907208F907209F907210F907211F907212F907213F907214F907215F907216F907217F907218F907219F907220F907221F907300F907301F907302F907303F907304F907305F907306F907307F907308F907309F907310F907311F907312F907313F907314F907315F907316F907317F907318F907319F907320F907321F907820S978525S907830S907835S907840S907840F

47860S47840F47850F47860F47880F47882F47884F47886F49325U49330U49335U49340U49350U49360U49380U49382U49384U49386U49388U49399U49321U49322U49415U49420U49425U49430U49435U49440U49450U49460U49480U49482U49484U49486U49540U49550U49560U49580U49582U49584U49640U49650U49660U49680U49682U49684U49686U49740U

907860F907840F907850F907860F907880F907882F907884F907886F909325U909330U909335U909340U909350U909360U909380U909382U909384U909386U909388U909399U909321U909322U909415U909420U909425U909430U909435U909440U909450U909460U909480U909482U909484U909486U909540U909550U909560U909280U909582U909584U909640U909650U909660U909680U909682U909684U909686U909740U

49750U49760U49780U49782U49784U49786U49840U49850U49860U49880U49882U49884U49886U

909750U909760U909780U909782U909784U909786U909840U909850U909860U909880U909882U909884U909886U

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SilencerAccessories

Connectors

6�6�88�8�148�8�168�8�185�5�86�6�106�6�106�6�108�8�145�5�85�5�85�5�85�5�88�8�1210�10�1410�10�1410�10�1410�10�148�10�14

PartNumber Size

Cat® 398/399Cat® 3516 Quad TurboCat® 3516 Quad TurboCat® 3516 Quad Turbo

Onan® VTA28G1/2Onan® KTA38G1/2

Onan® KTA38G3/4/5Onan® KTA50G1/2Onan® KTTA50G2Detroit 12V71TADetroit12V92TDetroit 16V71TDetroit 16V92TDetroit 12V149T

Detroit 12V149TIBDetroit 16V149T

Detroit 16V149TIBDetroit 24V71TADetroit 20V149TI

EngineModel

Wye Assembly

5� 8� 186� 8� 188� 10� 18

Part Number Size

Reducing Flex Connector

1� 181.25 � 181.5 � 182 � 18

2.5 � 183 � 18

3.5 � 184 � 185 � 186 � 188 � 18

Part Number Size

Male NPT Connections

3 � 183.5 � 184 � 185 � 186 � 188 � 1810 � 1812 � 1814 � 1816 � 18

Part Number Size

ANSI Flanged Connections

All assemblies are heli-arc welded to ensurethat the base material is not undercut.

Expanded and slotted cuffs may besubstituted for male pipe threads at no charge.

Cat® or Cummins flanges may besubstituted for ANSI flange at no charge.Wye Assembly can be modified with largeoutlet flanges upon request.

We verify engine outlet flange dimensions andoutlet centerline spreads on each order due tocontinuous changes by engine manufacturers.

Note: 14"–16" no deduct below 18"; furnished with 150 lb standard flanges and stainless steel bellows

For connector ordering information,please call 608-873-4272.

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SilencerAccessoriesGaskets, Caps, and Openings

Q34361Q34362Q34363Q34853Q34854Q34855

10–1416–1822–2630–3642–4854–60

PartNumber Body Size

4.1258.1258.250

12.37516.00020.000

Pressure ReliefCover Diameter

Explosion Relief Cover

Explosion relief covers are designed to open at5 PSI to protect silencer shell against rupturein case of backfire or explosion of residualgases within the exhaust system. One unit inthe first chamber of silencer is adequate.

Inspection openings have removable covers toprovide access to silencer internals forinspection or cleaning. One opening persilencer is recommended.

Q34822Q34852

5 � 78 � 10

Part Number Insp Opening Sz

6.012.0

Weight

Inspection Openings

Q04166Q04167Q04168Q04169Q04170Q04171Q04172Q79468Q79469Q79470Q79471

4.05.06.08.010.012.014.016.018.020.022.0

Part Number Size

Gaskets

Q347458Q347459Q347460Q347461Q347462Q347463Q347464Q347465Q347466Q347467Q347468

4.05.06.08.0

10.012.014.016.018.020.022.0

Part Number Size

Gasket Kit (Nut/Bolt)

40707K40710K40713K40715K40720K40725K40730K40735K40740K

3.003.504.00

3.005/3.0353.505/3.5454.005/4.045

446

5.56.06.5

1.601.701.70

0.751.001.251.502.002.50

.755/.7551.005/1.0251.255/1.2751.505/1.5252.005/2.0252.505/2.535

222244

2.52.53.03.04.05.0

PartNumber Size NPT

(A) Inside

Diameter

(B)Slots

(C)Overall Length

0.811.001.001.001.101.60

(D)Neck Length

Slotted Pipe End Adapters

89420A89425A89430A89435A89440A89450A89460A89480A89483A89482A89495A89484A89498A89486A89488A89492A89494A89496A

2.002.503.003.504.005.006.008.008.25

10.0010.4012.0012.4014.0016.0018.0020.0022.00

PartNumber

Exhaust StackOutside Diameter

Rain Caps

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2.25

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2.25

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SilencerAccessories

Clamps and ElbowsExha

ust S

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ers

40340K40350K40360K40380K40382K40384K40386K40388K

4.05.06.08.010.012.014.016.0

Part Number Size

8.510.512.516.520.624.628.628.5

Length

Outlet Extensions

40640K40650K40660K40680K40682K40684K

111222

4.0005.0006.0008.25010.37512.375

6.58.512.512.014.016.0

7.59.012.012.014.016.0

Part Number Style A B C

90° Outlet Elbows

Q186091Q27240Q186092Q27241Q27242Q27243

9.010.011.012.014.016.0

0.090.090.090.090.090.09

4.251.501.251.501.501.50

4.55.05.05.06.06.0

Part Number Size T B D

0.880.820.880.820.940.94

G

Mounting Bracket Clamp Style 1

Q27244Q27245Q27246Q27247Q27248

18.022.026.030.036.0

18.322.1526.1530.2536.25

9.011.013.015.018.0

0.630.630.630.630.63

11.1213.6215.4417.2520.12

Part Number Size T B D G

Mounting Bracket Clamp Style 2

Mounting bracket clamps are available for silencers up to 36" body diameter. Type “F” brackets welded to silencersgreater than 36" in body diameter. Specifications are subject to change without notice, all dimensions are in inches.

Split design allows for easier installation of larger silencers. Each part consists of two mounting brackets.

90° Outlet Elbows include nuts, bolts, gaskets and 125/150# ASA drilled flanges; Style I short radius 90° (14GAD.Q.S.K. aluminized steel); Style II 90° mitered tube (12GA aluminized steel)

Outlet Extensions include nuts, bolts and gasket.

Style 1

Style 2

Style 1 Style 2

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SilencerAccessoriesWeld-On Mounting Brackets Ex

haus

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s

10.1211.1212.1214.1216.1218.1222.1226.1230.1236.1242.2548.2554.2560.25

Body Diameter

Type “B” Mounting Brackets*

C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25

A

4.04.04.04.04.04.04.04.04.04.04.04.04.04.0

B

2.02.02.02.02.02.02.02.02.02.02.02.02.02.0

C

0.5000.5000.5000.5000.5000.5000.5000.6250.6250.6250.6250.6250.8750.875

D

14.315.316.318.320.322.326.430.434.440.446.552.558.564.5

E

*Add “N” to the part number when ordering a silencer with Type B brackets (for example, a 41180F would be ordered as 41180N).

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SilencerAccessories

Weld-On Mounting Brackets

10.1211.1212.1214.1216.1218.1222.1226.1230.1236.1242.2548.2554.2560.25

Body Diameter

Type “D” Mounting Brackets*

10.011.012.014.016.018.022.026.030.036.042.048.054.060.0

A

0.5000.5000.5000.5000.5000.5000.6250.6250.6250.8750.8751.1251.1251.125

B

6.06.06.06.06.06.06.06.06.06.07.07.07.07.0

C

0.50.50.50.50.50.50.50.50.50.50.50.50.50.5

D

2.0 � 2.0 � .1872.0 � 2.0 � .1872.0 � 2.0 � .1872.0 � 2.0 � .1872.0 � 2.0 � .1872.0 � 2.0 � .1873.0 � 3.0 � .5003.0 � 3.0 � .5003.0 � 3.0 � .5003.0 � 3.0 � .5004.0 � 4.0 � .5004.0 � 4.0 � .5004.0 � 4.0 � .5004.0 � 4.0 � .500

E

5.05.05.05.05.05.05.05.05.05.05.05.05.05.0

F

*Add “E” to the part number when ordering a silencer with Type D brackets (for example, a 41180F would be ordered as 41180E).

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SilencerAccessoriesWeld-On Mounting Brackets Ex

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10.1211.1212.1214.1216.1218.1222.1226.1230.1236.1242.2548.2554.2560.25

Body Diameter

Type “E” Mounting Brackets*

C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25C4 � 7.25

A

4.04.04.04.04.04.04.04.04.04.04.04.04.04.0

B

2.02.02.02.02.02.02.02.02.02.02.02.02.02.0

C

0.5000.5000.5000.5000.5000.5000.5000.6250.6250.6250.6250.6250.8750.875

D

14.315.316.318.320.322.326.430.434.440.446.552.558.564.5

E

*Add “C” to the part number when ordering a silencer with Type E brackets (for example, a 41180F would be ordered as 41180C).

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SilencerAccessories

Weld-On Mounting Brackets

8.129.00

10.1211.1212.1214.1216.1218.1222.1226.1230.1236.1242.2548.2554.2560.25

0.3750.3750.5000.5000.5000.5000.5000.5000.5000.500

15.017.020.024.029.032.034.039.044.049.0

2.52.53.03.04.04.04.04.04.04.0

13.015.018.022.026.028.030.035.040.045.0

1.001.001.001.001.501.501.501.501.501.50

0.5000.5000.6250.6250.8750.8751.1251.1251.2501.250

0.2500.2500.3750.3750.3750.375

7.07.08.09.0

10.013.0

2.02.02.52.52.52.5

5.05.06.07.08.0

11.0

Body Dia. A B C D

0.750.751.001.001.001.00

0.4380.4380.5000.5000.5000.500

E F

6.57.07.08.09.0

10.010.011.011.012.0

5.04.51.55.05.56.0

G

3.523.523.363.363.363.363.363.323.323.32

3.693.693.553.553.553.55

H

8.179.17

11.2213.2415.2418.2621.2624.3027.3330.33

4.114.555.145.646.147.14

J

2.02.02.02.03.03.03.03.03.03.0

1.51.52.02.02.02.0

K

12.012.010.010.010.010.010.07.07.07.0

16.016.014.014.014.014.0

L

Type “F” Mounting Brackets*

*Add “Y” to the part number when ordering a silencer with Type F brackets (for example, a 41180F would be ordered as 41180Y).

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SilencerAccessoriesMounting Flanges

40140K40150K40160K40180K40182K40184K40186K40188K40199K40121K40122K

14.016.018.020.022.0

14.18816.00018.00020.00022.000

18.7521.2522.7525.0027.25

1.1251.1251.2501.2501.375

21.023.525.027.529.5

0.6250.6250.6250.7500.750

4.05.06.08.0

10.012.0

4.5635.6256.1878.750

10.87512.875

7.508.509.50

11.7514.2517.00

0.7500.8750.8750.8751.0001.000

PartNumber

NominalPipe Size A B C

9.010.011.013.516.019.0

0.5000.5000.5000.5000.6250.625

D E

1216162020

8888

1212

Holes

Mounting Flanges (Unthreaded)

Listed part number for dual flange kits. Pleasecall for single flange kits.

40040K40050K40060K40080K

4568

7.508.509.50

11.75

0.7500.8750.8750.875

9.010.011.013.5

PartNumber A B C D

1.311.441.561.75

0.940.941.001.12

E F

5.316.447.569.75

G

8888

Holes

Mounting Flanges (Threaded)

Listed part number for dual flange kits. Pleasecall for single flange kits.

A “kit” consists of a mounting flange for eachinlet and outlet, a gasket, and one capscrewand nut for each inlet and outlet mountinghole. Available in dual or single flange kits.

A “kit” consists of a mounting flange for eachinlet and outlet, a gasket, and one capscrewand nut for each inlet and outlet mountinghole. Available in dual or single flange kits.

Global Support

Corporate Headquarters

Manufacturing Locations

Business Offices

Eje 120 No. 350Zona Industrial 1a. Seccion78090 San Luis Potosi, S.L.P.MexicoPhone [email protected]

Unit 2, BarleyfieldHinckleyLeicestershireLE10 IYEPhone [email protected]

71 Bukit Batok Crescent #05-07Prestige CentreSingapore 658071SingaporePhone [email protected]

Suite 13C, No 58 Xin Jin Qiao RdShanghai 201206ChinaPhone [email protected]

Zeppelinstrasse 482178 PuchheimGermany

[email protected]

1925 Highway 51/138P.O. Box 411Stoughton, WI 53589 USAPhone [email protected]

Contact a global office for assistance in the design and manufacture of your exhaust requirements.

1925 Highway 51/138P.O. Box 411Stoughton, WI 53589 USAToll-Free (888) 300-4272Fax (608) [email protected]

Phone 49 (0) 89 800 650 90

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