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Top In Top Out

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Side In Top Out

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Inline

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Side Angled In Top Out

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Rectangular Top In Top Out

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Rectangular Side in Top Out

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Safety Links and Equipment

We do not offer the products below. I compiled this list in hopes that it may help.
Please be careful and follow the USCG and other organizations safety guidelines.
If you know of any good links or products, please email them to me at Markyall@comcast.net

Alarms

If you know of any good links or products, please email them to me at Markyall@comcast.net

Fireboy Don’t know much about them but their product looks good. CO2 alarms etc,,
AQUA ALARM Alot of good alarms, cooling water loss etc…

Links

If you know of any good links or products, please email them to me at Markyall@comcast.net

United States Coast Guard
Office of Boating Safety
CG Headquarters G-OPB-3
2100 Second Street SW
Washington, DC 20593

National Marine Manufacturers Association
200 East Randolph Drive Suite 5100
Chicago, IL 60601-6528

American Boat & Yacht Council, Inc.
3069 Solomon’s Island Road
Edgewater, MD 21037-1416

Marine Safety Manual

Boat Safety for All Ages

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Accessories

Accessories available as modifications to stock silencers include flexible connectors, companion flanges, mounting brackets, cleanouts and spark boxes.

 

Flexible Connectors

Bellows Type Interlock Type Nipples 1 1/2″ to 3 1/2″ Flanges 4″ and UP

 

850 Deg F. Max Temp. Carbon Steel Over 850 Deg F. Stainless SteelID Size Length Overall Steel Bellows Steel Interlock SS Bellows SS Interlock1 1/2″ 24″ Yes Yes Yes Yes2″ 24″ Yes Yes Yes Yes2 1/2″ 24″ Yes Yes Yes Yes3″ 24″ Yes Yes Yes Yes3 1/2″ 24″ Yes No Yes No4″ 24″ Yes Yes Yes Yes5″ 24″ Yes Yes Yes Yes6″ 24″ Yes Yes Yes Yes8″ 24″ Yes No Yes No10″ 24″ Yes No Yes No12″ 24″ Yes No Yes NoThose not shown and other sizes available on special quote.  Sizes 1 1/2″ through 3 1/2″ furnished with carbon steel male thread pipe nipples.  Sizes 4″ through 12″ furnished with 125 ASA flat face flanges of carbon steel.

Companion Flanges

Size (IPS) O.D. B.C. HolesNO. Dia.4 9 7 1/2 8 3/45 10 8 1/2 8 7/86 11 9 1/2 8 7/88 13 1/2 11 3/4 8 7/810 16 14 1/4 12 112 19 17 12 114 21 18 3/4 12 1 1/816 23 1/2 21 1/4 16 1 1/818 25 22 3/4 16 1 1/420 27 1/2 25 20 1 1/422 29 1/2 27 1/4 20 1 3/824 32 29 1/2 20 1 3/826 34 1/4 31 3/4 24 1 3/828 36 1/2 34 28 1 3/830 38 3/4 36 28 1 3/8Companion flanges are available as either weld-on or screw-on type.  All gaskets, bolts and nuts are furnished.  Flange drilling to 125# ASA standard.  Weld type flange slips on standard pipe for welding.  Screw-on type is threaded to fit standard NPT.

Screw-on flanges available in 4″ through 12″ only.  Weld-on type available in all sizes.

Mounting Brackets and Supports

Type E
Four Brackets

Type F
Two Saddle Supports

Type D
Three
Leg Supports Type A
Two
Trunion Supports Type B
Four Brackets

Clean Outs

Spark Boxes

(Clean Out) Dimensions in Inches

Size 2A 5A 7AA 7 1/2 9 1/2 16B 4 1/2 6 1/2 9

Engineering Data

Finishes

Air Compressor Intake – Vacuum Pump Discharge

Max. Cu. Ft. Of Free Air Per Min. Size of Silencers20 1″30 1 1/4″50 1 1/2″85 2″130 2 1/2″185 3″255 3 1/2″350 4″550 5″775 6″

Max. Cu. Ft. Of Free Air Per Min.

Size of Silencers

1390 8″2180 10″3160 12″4280 14″5610 16″7000 18″8700 20″10500 22″12500 24″    Exterior surfaces protected by a high temperature corrosion resistant coating.

Optional finishes are available.

Popular special paint option is Inorganic Zinc Paint applied over sandblasted surface.  Other customer requirements may be supplied upon request.

 

Please e-mail Mark Coulson or call 1-251-928-1234.

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Older Model Quick Reference Guide

SILENCING THEORY

In simple terms, silencing is the act of reducing noise to an acceptable level for the location or working conditions surrounding the noise producing equipment. MAXIM’s money saving line of stock silencers readily solves noise problems of many applications. Comparison of the typical attenuation curves for individual silencer models will show the relative capabilities of different designs.

CHAMBER TYPE SILENCERS
MODELS M21, M31, M41, M51 AND MUL

Chamber type silencers provide the best noise control across the entire audible range. The basic design incorporates non-resonant side tube arrangements to permit passage of the exhaust gases from one chamber to another. This creates a reversal of flow and develops a predictable amount of back pressure. Another important feature of chamber type silencers is the availability of side inlet exhaust connections. Units of this type, except for spark arrestor designs, can also be supplied with side outlet exhaust connections. These side connections, while having little effect on the pressure drop, will in many instances, greatly facilitate installation of the silencer by eliminating the need for elbows in the piping.

SILENCER MODEL

M21Good chamber type silencer. Use in areas where background noise is relatively high and constant and the need for higher degree of silencing is minimal. Expected attenuation is 17 to 20 dBA.M31Better chamber type silencer for residential areas where background noise is present but not objectionable. With expected attenuation of 20 to 24 dBA, the M31 is intended to bring most exhaust noise levels down to match the ambient noise levels.M41Excellent chamber type silencer. Use an M41 in quiet residential area where background noise is relatively low and critical grade silencing is desired. Expected attenuation is 24 to 28 dBA.M51Best chamber type silencer for “Hospital Grade” silencing. Use an M51 for the highest degree of silencing for areas requiring the maximum noise reduction available from standard chambered silencer design. Expected attenuation is 28 to 32 dBA.MULThe MUL is comparable to the M31 for pipe thread sizes 1″ to 31/2″. COMPACT CHAMBER TYPE SILENCERS
MODELS MD26, MD36

Compact design is engineered to provide a “critical” grade of attenuation while minimizing space usage. Excellent application for packaged power and process skids where space is a
premium. Dual inlets and other custom designs can be easily incorporated.  Low Temperature design not only reduces skin temperature, but radiated noise as well.  Heavy duty, welded construction with temperature resistant insulation within a double wall construction. The inlet and outlets are standard with ANSI drilled 125/150 lb flanges. Standard finish is high temperature resistant silicone black. Alternate finishes may be available upon request. Standard material is carbon steel. Stainless steel is optional.

SILENCER MODEL

MD26Expected attenuation is 28-32 dBAMD36Expected attenuation is 33-37 dBA

 

CHAMBER TYPE SPARK ARRESTOR SILENCERS
MODELS MSA1, MSA2, MSA3 AND MSA4

Spark arrestor silencers have application in marine service, refineries and other hazardous environments. These are chamber type designs. Theretention of hot carbon and soot particles minimizes danger and helps to provide a cleaner area and atmosphere.

SILENCER MODEL

MSA1Highly efficient spark arrestor silencer with M21 attenuation characteristics. Expected attenuation is 17 to 20 dBA.MSA2Highly efficient spark arrestor silencer with M31 attenuation characteristics. Expected attenuation is 20 to 24 dBA.MSA3Highly efficient spark arrestor silencer with M41 attenuation characteristics. Expected attenuation is 24 to 28 dBA.MSA4Highly efficient spark arrestor silencer with M51 attenuation characteristics. Expected attenuation is 28 to 32 dBA. 

LOW PRESSURE DROP, STRAIGHT THROUGH SILENCERS
MODELS MT21, MT31 AND MT41

Straight through silencers have an unobstructed passage through the silencer with no reversal of flow. The result is a pressure drop across the silencer only slightly above that caused by an equivalent length of pipe. Side connections are not practical in this design due to increase in pressure drop and price. Since noise attenuation provided by straight through design is less than that provided by chamber design silencers incorporating a reversal of flow, the MT series is best used in applications where low pressure drop is the primary consideration.

SILENCER MODEL

MT21For noise control applications requiring low pressure drop. Expected attenuation is 13 to 16 dBA.MT31For average attenuation of objectionable noise where effective though not complete silencing is required with low pressure drop. Expected attenuation is 16 to 19 dBA.MT41For better than average noise attenuation with low pressure drop requirements. Expected attenuation is 19 to 22 dBA. 

MARINE ENGINE WET EXHAUST SILENCERS
MODELS MP-11, MP-31 AND MP-41

Constructed of stainless steel, the MAXIM MP series silencers are available for wet marine engine exhaust applications. Water is injected upstream of the silencer in sufficient quantity to reduce the exhaust temperature to a maximum of 200o F. The MP-11 may be installed in series with an MP-31 or MP-41 to provide additional attenuation.

SILENCER MODEL

MP-11Low pressure drop with good performance. Expected attenuation is 15 to 18 dBA.MP-31Medium pressure drop with better performance. Expected attenuation is 20 to 25 dBA.MP-41Highest performance for a wet exhaust application. Expected attenuation is 30 to 35 dBA. 

VENT SILENCERS FOR COMPRESSED AIR, GAS AND STEAM
MODELS VT-S, VT-1, VT-2 AND VT-3

The MAXIM VT series silencers are designed to attenuate high frequency noise associated with venting of high pressure air, gas or steam to atmosphere. These ruggedly designed silencers feature all welded construction with concentric acoustically packed panels.

SILENCER MODEL

VT-1Good vent silencer for controlling noise generated by pressurized gases released to atmospheric pressure. Expected attenuation is 35 to 40 dBA.VT-2Better vent silencer for controlling noise generated by pressurized gases released to atmospheric pressure. Expected attenuation is 42 to 45 dBA.VT-3Best vent silencer for controlling noise generated by pressurized
gases released to atmospheric pressure. Expected attenuation is 50 to 55 dBA. 

ABSORPTIVE DESIGN
INTAKE MODELS: FP, FPC, FPS
DISCHARGE MODELS: FPE, FPCE, FPSE

Intake models are built “cleaned for intake service.” The FPE model in stock sizes 4″ through 12″ is also built clean for intake use and may be substituted for the FP. The “E” designation on any FP design indicates that the silencer is built to withstand hot engine exhaust service.

Absorptive silencer designs are compact and have low pressure drops. They are ideal for many applications for fan intakes and discharges, engine air intakes, small steam vents and centrifugal compressor inlets where absorption of high frequency noise is important. An FPE, FPCE, FPSE installed in series with an M-line chamber type silencer, can provide 10-20 enhancement of the overall dBA silenced exhaust noise of a reciprocating engine. Addition of an absorptive design silencer may improve the overall attenuation of the system by 10 to 20 dBA.

SILENCER MODELFP / FPEStraight through, absorptive silencer design with no center panel for low pressure drop service. Expected attenuation is 20 dBA.FPC / FPCESimilar to the FPE but with an internal center panel which displaces part of the nominal flow area. Pressure drop is higher but the FPC is more compact in diameter, length and weight. Available in sizes 14″ and up, the FPC is excellent for engine and compressor intakes and fan intakes and discharges. Expected attenuation is 20 to 25 dBA.FPS / FPSEDesigned with a center panel, the FPS / FPSE body diameter is enlarged to enable an annular flow passage equal to the full nominal flow area. Pressure drop is intermediate between the FP and FPC models. Expected attenuation is 15 to 30 dBA. 

PRESSURIZED SERVICE, ASME CODE DESIGN
MODELS ILL AND ILM

Designed to ASME Code, MAXIM offers the models ILL and ILM to reduce the noise generated by valves and compressors. Typical noise reductions associated with high pressure applications is within the range of 15 dBA to 30 dBA.

BLOWER SILENCERS
MAXIM MODEL MB11, MB21 AND MB31

Highly efficient in acoustic design, the MB series is used to reduce the noise radiating from blower piping or blower opening. Typical applications are for rotary positive blower intake and discharge, vacuum pump intake and discharge, and centrifugal blower intake and discharge.

SILENCER MODELMB11With its straight through acoustically packed design the MB11 offers good silencing for many blower applications. Typical attenuation is 15 to 30 dBA.MB21An efficient economical design, the MB21 is useful for blower noise reduction in applications where some background noise is always present and high degree silencing is not required. Typical attenuation is about 24 dBA.MB31A superior design, the MB31 incorporates an acoustically packed connection with a chamber type design to offer a high degree of attenuation of blower intake or discharge noise. Typical attenuation is about 30 dBA.

 

Please e-mail Mark Coulson or call 1-251-928-1234.

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HOME
We retail Turbos from various vendors, please provide all the information you can and we will do our best to source your part.
If your turbocharger requires rebuilding, we can help with that as well.
Some Common Models and information
3LM-3LD, 4LE-4LF,4MD-4HD, S1-S4, S1B-S4B, 4LHR, HT3B, KKK, H1C, HX30, HX35, HX40, HT60, H1E, WH1E, T3, T4,T04B, T04E, TA, TV, GT, GTP38,T30, T12, T18, HT3B, TMF, UTL, UTV

DETROIT NUMBER——BORG WARNER
PART NUMBER———PART NUMBER
8929435————-167736
8929507————-167735
8929796————-167736
8929797————-167735
8929902————-167736
8929903————-167735
23503732————167736
23504966————167735
23504967————167735
23507908————167736
23507909————167736
23508405————169012
23508406————169012
23508410————169011
23508411————169011
23515635————171701
23515636————171701
23516431————171701
23518588————171702
23518597————171702
23522188————172743
23522190————172743
23522312————172743
23525463————172743
23526016————172743
23526271————172743
23526272————172743
23526679————172743
23528052————172743
23528059————172743
23528062————172743
23528064————172743
23528065————172743
23528069————172743
23529103————172743
Model—————GM Part #
GM1, GM2, GM3——-10226226
GM4—————–10154652
GM5—————–12552738
GM8—————–12556124

3018067————-T46-NTC290 (Cummins)
3018068————-T46-NTC855 (Cummins)
3026924————-T46-NTC855 (Cummins)
3027704————-T46-VT1710 (Cummins)
3032060————-ST50-NT855 (Cummins)
3032062————-ST50-NTCC400/VTCC1710 (Cummins)
3523850————-HC5A-KTA19 (Cummins)
3524450————-HC5A-KTA38 (Cummins)
3524451————-HC5A-KTA38 (Cummins)
3525504————-HC5A-KTA19 (Cummins)
3523393————-HC5A-KTA50 (Cummins)
114400-1544———EX300-1 Excavator (Komatsu)
114400-2100———EX200-1 Excavator (Komatsu)
114400-2720———EX200-2 Excavator (Komatsu)
114400-3140———EX300-3 Excavator (Komatsu)
114400-3340———EX300-3C Excavator (Komatsu)
6151-83-8110——–PC400 Excavator (Komatsu)
6152-81-8110——–PC300 Excavator (Komatsu)
6207-81-8210——–PC200-3-5 Excavator (Komatsu)
6207-81-8331——–PC200-6 Excavator (Komatsu)
6209-81-8310——–PC220-6 Excavator (Komatsu)
43178-00530———4D31 Excavator (Mitsubishi)
49179-00110———TD06-17A Excavator (Mitsubishi)
49179-00451———E200B Excavator (Mitsubishi)
49179-02119———S6D31(TD06-17C) Excavator (Mitsubishi)
3522777————-Turbocharger 6BT H1C
3522778————-Turbocharger 6BT
3523393————-Turbocharger KTA50, HC5A
3524442————-Turbocharger, HC5A
3528789————-Turbocharger, H1E
3528793————-Turbocharger, H1E
3537288————-Turbocharger
3802289————-Turbocharger 6BT
3803015————-Turbocharger
3919153————-Turbocharger 6BT SY
4029017————-Turbocharger, WH1E
4029018————-Turbocharger
4029094————-Turbocharger
4029110————-Turbocharger
4029184————-Turbocharger
4050037————-Turbocharger
4050038————-Turbocharger
4050202————-Turbocharger
5104478————-Turbocharger 6V53T = 2990-01-151-2684 (Garret Box)
6137-81-8102——–Turbocharger, S6D105 W90-3 = 465044-0226
6137-82-8200——–Turbocharger, S6D105 PC200-3 = 465044-0261
6137-82-8600——–Turbocharger, S6D105 PC200-3 = 465044-0262
6138-82-8200——–Turbocharger, SA6D110 WA400-1/WA350-1 = 465044-0255
6138-82-8201——–Turbocharger, SA6D110 WA400-1 = 465044-0255
6150-81-8300——–Turbocharger, S6D125 D65-3 = 466152-0004
6151-81-8400——–Turbocharger, S6D125 PC300 = 466702-0001
6151-83-8210——–Turbocharger, S6D125 PC400 = 465105-0003
6152-81-8110——–Turbocharger, S6D125 PC300 = 465105-0001
6152-81-8110——–Turbocharger PC300
6152-81-8200——–Turbocharger, S6D125 HD250/HD250-3/WT250 = 465152-0001
6152-81-8210——–Turbocharger, S6D125 PC400 = 465105-0003
6152-81-8300——–Turbocharger, S6D125 WA450-1/GD705 /D60S/D75S= 466152-0002
6152-81-8310——–Turbocharger, S6D125 WA450/D75 465105-0002
6152-81-8400——–Turbocharger, PO96 FD400 466152-0003
6152-82-8500——–Turbocharger, PO96 FD400 466152-0005
6502-11-2002——–Turbocharger
6502-11-2004——–Turbocharger
6502-12-2003——–Turbocharger
6502-12-9002——–Turbocharger
6502-12-9004——–Turbocharger D355
6505-51-5190——–Turbocharger KT110 G44B
6505-52-5350——–Turbocharger KT1110 G44A
6711-81-9100——–Turbocharger D85-18
6711-81-9201——–Turbocharger D85-18

TURBOCHARGER PARTS
190227—————Turbine Housings T46 (Cummins)
202503—————Turbine Housings T46/ST50 (Cummins)
204244—————Turbine Housings T46/ST50 (Cummins)
3521174————–Turbine Housings HC5A (Cummins)
3522911————–Turbine Housings HC5A (Cummins)
3522914————–Turbine Housings HC5A (Cummins)
3524065————–Turbine Housings HC5A (Cummins)
3025390————–Turbo Wheel w/Shaft T46/ST50 (Cummins)
3521033————–Turbo Wheel w/Shaft HC5A (Cummins)
3521034————–Turbo Wheel w/Shaft HC5A (Cummins)
3018063————–Compressor Housing T46 (Cummins)
3018064————–Compressor Housing T46 (Cummins)
3027305————–Compressor Housing ST50 (Cummins)
3027306————–Compressor Housing ST50 (Cummins)
3523423————–Compressor Housing HC5A (Cummins)
3524861————–Compressor Housing HC5A (Cummins)
3525546————–Compressor Housing HC5A (Cummins)
3002731————–Compressor Impeller ST50 (Cummins)
3007755————–Compressor Impeller T46 (Cummins)
3011262————–Compressor Impeller ST50 (Cummins)
3012993————–Compressor Impeller T46 (Cummins)
3521918————–Compressor Impeller HC5A (Cummins)
3523420————–Compressor Impeller HC5A (Cummins)
3523553————–Compressor Impeller HC5A (Cummins)
3038745————–Bearing Housing T46/ST50 (Cummins)
3520933————–Bearing Housing HC5A (Cummins)
3524421————–Diffuser HC5A (Cummins)
3524862————–Diffuser HC5A (Cummins)
216804 ————–Support Oil Seal T46/ST50 (Cummins)
3545647————–Turbocharger Repair Kit = 3801169 HC5A
3801096————–Kit, Turbocharger, T-46, ST-50
3803042————–Kit, Turbocharger, T-46, ST-50
3803257————–Turbocharger Repair Kit = 3801169= 3546647 HC5A
3911941————–Gasket, Turbocharger
3926842————–Connection, Turbocharger
3942725————–Gasket, Turbo
6502-13-2003———Rotor, Turbo S6D155

2674398 = 465778-18 Garrett Perkins 4.236
409940-90007 T09B39 Air Research Garrett John Deere
409-250-5002 Garrett
2674A093 Garrett Perkins
2674A326 452301-1 Garrett Perkins
2674A024 3523299 Holset Perkins 6.354.4
2674374 4657785 Garrett Perkins
2674222 21I85-25 Schwitzer Perkins
2674237 181819 Schwitzer Perkins
4667469001 Garrett BSD268T
2674A024 3523299 Holset Perkins
104039-9000 T04B Garrett Perkins
2674A126 312174 Schwitzer
4176324KZ 31H9400097 Schwitzer Perkins
D4232252 Schwitzer
317960 Schwitzer
2674218 50908 Holset
2674A153 4668540001 Schwitzer
3537562 Holset
2674A093 452191-1 Garrett
4176324 Schwitzer
999103
309440
2674218 50908/14
2674222 53894/4

]]>

 

Quick Reference Guide In simple terms, silencing is the act of reducing noise to an acceptable level for the location or working conditions surrounding the noise producing equipment. These silencers readily solve the noise problems of many applications. Comparison of the typical attenuation curves for individual silencer models will show the relative capabilities of different designs.Silencer Sizing Sheet Introductory information that is needed to properly size a silencer to meet your needs.  Sizing data requested is minimum required to size a silencer. Other pertinent data such as connection sizes, degree of silencing desired, support arrangements, material of construction, installation arrangement, etc. are helpful in determining the best silencer application.Installation and Operating Instructions Basic installation and operating instructions for silencers.  Detailing the correct exhaust pipe length as well as support methods for the different models of silencers.Accessories Accessories available as modifications to stock silencers include flexible connectors, companion flanges, mounting brackets, cleanouts and spark boxes.Specification Sheets Complete specifications for the entire Maxim line.  Each model is detailed and described.Cross Reference Cross Reference Chart
If you already know what you need, please click our handy Quick Order Form
or if you need more information on a part number, please click our Quick Inquiry Form
(Both forms will generate an e-mail)
 

 

Please e-mail Mark Coulson or call 1-251-928-1234.

]]>

 

 

Silencer Sizing Sheet

INFORMATION NEEDED TO SIZE A MAXIM®SILENCER:

Sizing data requested is minimum required to size a silencer. Other pertinent data such as connection sizes, degree of silencing desired, support arrangements, material of construction, installation arrangement, etc. are helpful in determining the best silencer application. Please provide as much information about your system as possible.

ENGINE EXHAUST – Models M21, M31, M41, M51, MSA1, MSA2, MSA3, MSA4, MT21, MT31, MT41

1. Silencer Model Considered _______________________________________
2. Maximum Exhaust Gas Flow Rate ___________ ACFM ___________ PPH o C
3. Maximum Exhaust Gas Temp. ________________ o F __________
4. Maximum Allowable Press. Drop ________________________ Inches WC
5. Other considerations: ___________________________________________

WET EXHAUST FOR MARINE ENGINE APPLICATION – Models MP11, MP31, MP41

1. Silencer Model Considered ______________________________________
2. Maximum Exhaust Gas Flow Rate __________ ACFM ____________ PPH o C
3. Maximum Exhaust Gas Temp. ________________ o F __________
4. Maximum Allowable Press. Drop ________________________ Inches WC
5. Water injection rate ________________________________________GPM
6. Other considerations: ___________________________________________

VENT SERVICE – Models VT-S, VT-1, VT-2, VT-3

 

1. Maximum Pressure Upstream of Valve ________________________ PSIG
(or Pressure Controlling Device)

2. Maximum Temperature Upstream _____________ o F ____________ o C
3. Type of Gas __________________________________________________
4. Maximum weight flow rate ________________________________ PPH
5. Silenced noise criteria dBA and applicable distance from silencer to which
criteria applies: _________________ silenced dBA at _____________ feet.
6. Other considerations: _________________________________________

 

INTAKE SERVICE – Models FPE, FPC, FPS

1. Intake Air Flow ____________________PPH ___________________SCFM
2. Intake Temperature ________________ o F ___________________ o C
3. Maximum Allowable Press. Drop _________________________ Inches WC
4. Equipment to be used on: ______________________________________
5. Other considerations: _________________________________________

PRESSURE SERVICE – ASME Code Design – Models ILL and ILM

1. Type of Gas ___________________ Molecular Weight _________________
2. Maximum Mass Flow Rate __________________________________PPH
3. Upstream of Valve Pressure______________________________________
Temperature _________________ o F _____________ o C
4. Downstream of Valve Pressure __________________________________
Temperature _________________ o F _____________ o C
5. Other considerations: ___________________________________________

ROTARY POSITIVE BLOWER SERVICE- Models MB11, MB21, MB31

1. Silencer Model Considered _____________________________________
2. Maximum Gas Flow Rate __________________________________ SCFM o C
3. Operating Gas Temp. _________________ o F _______________
4. Operating Gas Pressure _____________________________________PSIG
5. Maximum Allowable Press. Drop ________________________ Inches WC
6. Other considerations: __________________________________________

 

 

Please e-mail Mark Coulson or call 1-251-928-1234.

]]>

 

 

Quick Reference Guide

SILENCING THEORY

In simple terms, silencing is the act of reducing noise to an acceptable level for the location or working conditions surrounding the noise producing equipment. MAXIM’s money saving line of stock silencers readily solves noise problems of many applications. Comparison of the typical attenuation curves for individual silencer models will show the relative capabilities of different designs.

CHAMBER TYPE SILENCERS
MODELS M21, M31, M41, M51 AND MUL

Chamber type silencers provide the best noise control across the entire audible range. The basic design incorporates non-resonant side tube arrangements to permit passage of the exhaust gases from one chamber to another. This creates a reversal of flow and develops a predictable amount of back pressure. Another important feature of chamber type silencers is the availability of side inlet exhaust connections. Units of this type, except for spark arrestor designs, can also be supplied with side outlet exhaust connections. These side connections, while having little effect on the pressure drop, will in many instances, greatly facilitate installation of the silencer by eliminating the need for elbows in the piping.

SILENCER MODEL

M21Good chamber type silencer. Use in areas where background noise is relatively high and constant and the need for higher degree of silencing is minimal. Expected attenuation is 17 to 20 dBA.M31Better chamber type silencer for residential areas where background noise is present but not objectionable. With expected attenuation of 20 to 24 dBA, the M31 is intended to bring most exhaust noise levels down to match the ambient noise levels.M41Excellent chamber type silencer. Use an M41 in quiet residential area where background noise is relatively low and critical grade silencing is desired. Expected attenuation is 24 to 28 dBA.M51Best chamber type silencer for “Hospital Grade” silencing. Use an M51 for the highest degree of silencing for areas requiring the maximum noise reduction available from standard chambered silencer design. Expected attenuation is 28 to 32 dBA.MULThe MUL is comparable to the M31 for pipe thread sizes 1″ to 31/2″. COMPACT CHAMBER TYPE SILENCERS
MODELS MD26, MD36

Compact design is engineered to provide a “critical” grade of attenuation while minimizing space usage. Excellent application for packaged power and process skids where space is a
premium. Dual inlets and other custom designs can be easily incorporated.  Low Temperature design not only reduces skin temperature, but radiated noise as well.  Heavy duty, welded construction with temperature resistant insulation within a double wall construction. The inlet and outlets are standard with ANSI drilled 125/150 lb flanges. Standard finish is high temperature resistant silicone black. Alternate finishes may be available upon request. Standard material is carbon steel. Stainless steel is optional.

SILENCER MODEL

MD26Expected attenuation is 28-32 dBAMD36Expected attenuation is 33-37 dBA

 

CHAMBER TYPE SPARK ARRESTOR SILENCERS
MODELS MSA1, MSA2, MSA3 AND MSA4

Spark arrestor silencers have application in marine service, refineries and other hazardous environments. These are chamber type designs. Theretention of hot carbon and soot particles minimizes danger and helps to provide a cleaner area and atmosphere.

SILENCER MODEL

MSA1Highly efficient spark arrestor silencer with M21 attenuation characteristics. Expected attenuation is 17 to 20 dBA.MSA2Highly efficient spark arrestor silencer with M31 attenuation characteristics. Expected attenuation is 20 to 24 dBA.MSA3Highly efficient spark arrestor silencer with M41 attenuation characteristics. Expected attenuation is 24 to 28 dBA.MSA4Highly efficient spark arrestor silencer with M51 attenuation characteristics. Expected attenuation is 28 to 32 dBA. 

LOW PRESSURE DROP, STRAIGHT THROUGH SILENCERS
MODELS MT21, MT31 AND MT41

Straight through silencers have an unobstructed passage through the silencer with no reversal of flow. The result is a pressure drop across the silencer only slightly above that caused by an equivalent length of pipe. Side connections are not practical in this design due to increase in pressure drop and price. Since noise attenuation provided by straight through design is less than that provided by chamber design silencers incorporating a reversal of flow, the MT series is best used in applications where low pressure drop is the primary consideration.

SILENCER MODEL

MT21For noise control applications requiring low pressure drop. Expected attenuation is 13 to 16 dBA.MT31For average attenuation of objectionable noise where effective though not complete silencing is required with low pressure drop. Expected attenuation is 16 to 19 dBA.MT41For better than average noise attenuation with low pressure drop requirements. Expected attenuation is 19 to 22 dBA. 

MARINE ENGINE WET EXHAUST SILENCERS
MODELS MP-11, MP-31 AND MP-41

Constructed of stainless steel, the MAXIM MP series silencers are available for wet marine engine exhaust applications. Water is injected upstream of the silencer in sufficient quantity to reduce the exhaust temperature to a maximum of 200o F. The MP-11 may be installed in series with an MP-31 or MP-41 to provide additional attenuation.

SILENCER MODEL

MP-11Low pressure drop with good performance. Expected attenuation is 15 to 18 dBA.MP-31Medium pressure drop with better performance. Expected attenuation is 20 to 25 dBA.MP-41Highest performance for a wet exhaust application. Expected attenuation is 30 to 35 dBA. 

VENT SILENCERS FOR COMPRESSED AIR, GAS AND STEAM
MODELS VT-S, VT-1, VT-2 AND VT-3

The MAXIM VT series silencers are designed to attenuate high frequency noise associated with venting of high pressure air, gas or steam to atmosphere. These ruggedly designed silencers feature all welded construction with concentric acoustically packed panels.

SILENCER MODEL

VT-1Good vent silencer for controlling noise generated by pressurized gases released to atmospheric pressure. Expected attenuation is 35 to 40 dBA.VT-2Better vent silencer for controlling noise generated by pressurized gases released to atmospheric pressure. Expected attenuation is 42 to 45 dBA.VT-3Best vent silencer for controlling noise generated by pressurized
gases released to atmospheric pressure. Expected attenuation is 50 to 55 dBA. 

ABSORPTIVE DESIGN
INTAKE MODELS: FP, FPC, FPS
DISCHARGE MODELS: FPE, FPCE, FPSE

Intake models are built “cleaned for intake service.” The FPE model in stock sizes 4″ through 12″ is also built clean for intake use and may be substituted for the FP. The “E” designation on any FP design indicates that the silencer is built to withstand hot engine exhaust service.

Absorptive silencer designs are compact and have low pressure drops. They are ideal for many applications for fan intakes and discharges, engine air intakes, small steam vents and centrifugal compressor inlets where absorption of high frequency noise is important. An FPE, FPCE, FPSE installed in series with an M-line chamber type silencer, can provide 10-20 enhancement of the overall dBA silenced exhaust noise of a reciprocating engine. Addition of an absorptive design silencer may improve the overall attenuation of the system by 10 to 20 dBA.

SILENCER MODELFP / FPEStraight through, absorptive silencer design with no center panel for low pressure drop service. Expected attenuation is 20 dBA.FPC / FPCESimilar to the FPE but with an internal center panel which displaces part of the nominal flow area. Pressure drop is higher but the FPC is more compact in diameter, length and weight. Available in sizes 14″ and up, the FPC is excellent for engine and compressor intakes and fan intakes and discharges. Expected attenuation is 20 to 25 dBA.FPS / FPSEDesigned with a center panel, the FPS / FPSE body diameter is enlarged to enable an annular flow passage equal to the full nominal flow area. Pressure drop is intermediate between the FP and FPC models. Expected attenuation is 15 to 30 dBA. 

PRESSURIZED SERVICE, ASME CODE DESIGN
MODELS ILL AND ILM

Designed to ASME Code, MAXIM offers the models ILL and ILM to reduce the noise generated by valves and compressors. Typical noise reductions associated with high pressure applications is within the range of 15 dBA to 30 dBA.

BLOWER SILENCERS
MAXIM MODEL MB11, MB21 AND MB31

Highly efficient in acoustic design, the MB series is used to reduce the noise radiating from blower piping or blower opening. Typical applications are for rotary positive blower intake and discharge, vacuum pump intake and discharge, and centrifugal blower intake and discharge.

SILENCER MODELMB11With its straight through acoustically packed design the MB11 offers good silencing for many blower applications. Typical attenuation is 15 to 30 dBA.MB21An efficient economical design, the MB21 is useful for blower noise reduction in applications where some background noise is always present and high degree silencing is not required. Typical attenuation is about 24 dBA.MB31A superior design, the MB31 incorporates an acoustically packed connection with a chamber type design to offer a high degree of attenuation of blower intake or discharge noise. Typical attenuation is about 30 dBA.

 

Please e-mail Mark Coulson or call 1-251-928-1234.

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