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Marine Exhaust Systems of Alabama, Inc.757 Nichols Ave.
Fairhope, AL 36532


Directions are pretty easy.
If coming from West of Mobile, take I-10 until you cross the bay way(thru the tunnel and across the bay), take a right at the Fairhope/DaphneExit.
If coming from East of Mobile on I-10, take exit 35 and head east (you’llactually be heading south) on Hwy 98.
Drive for approximately 15 minutes. Stay straight! Once you pass Thomas Hospital take a right at the next light, Nichols Ave.
We are the fourth or fifth business on the right, the next buildingpass the Flower Shop.
If coming from Foley/Gulf Shores area, take Hwy 98 up until you passBurger King. Second Light is Nichols Ave, take a left.
We are the fourth of fifth business on the right, the next buildingpass the Flower Shop restaurant.
If you have any questions, please call 1-251-928-1234ask for Mark or e-mail me.
 
 
 
 
 
 
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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.

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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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Installation & Operating Instructions

Exhaust Pipe Length

To prevent unsatisfactory performance due to piping resonance or shock waves that can develop in the piping between the engine and the silencer, it is recommended that the silencer be installed as close as possible to the engine. The exhaust pipe length between engine and silencer should not exceed fifteen times the silencer size. For example, a 6” silencer should be installed within seven and one-half feet (90”) of the engine. If the above recommendation can not be followed, the customer should discuss the installation with Maxim.

Exhaust System Expansion Joints

For most exhaust systems designs, it is necessary that an expansion joint be installed between the engine and the silencer. This will allow thermal expansion as well as reduce the amount of engine vibration transmitted to the silencer. If a short exhaust system with no expansion joint is desired and the silencer is to be supported directly on the engine flange, the silencer inlet should be provided with gussets.

Flow Arrow

It is imperative that the exhaust gas flow in the correct direction. All silencers are equipped with nameplates that show the correct flow direction.

Spark Arrestor Orientation

On spark arrestor silencers, the silencer body is equipped with a box on the side that acts as spark trap. If the silencer is mounted horizontally, the spark trap should be on the underside. If the silencer is mounted vertically, the orientation of the spark trap is discretionary. The purpose of the couplings on the spark trap is to provide access for cleaning purposes.

Support Methods

The silencer may be supported by the inlet and outlet flanges, provided the piping on both ends of the silencer is equipped with lateral supports or guides to prevent large bending moments from being transmitted to the silencer flanges. The following flange loadings are the maximum permissible for most installations. Do not load beyond these limits: Axial (in a direction parallel to the nozzle axis): A force equal to the silencer weight. Shear (in a direction perpendicular to the nozzle axis): A for equal to the silencer weight. Bending Moment: The silencer weight multiplied by the silencer size. For example, a 12” M-51 which weighs 1,295 lbs. can withstand the following nozzle loads: axial: 1,295 lbs., shear: 1,295 lbs., bending moment: 15,540 inch-lbs. Contact Maxim for additional loading information.

For those installations where the silencer is to be supported by the inlet only, the user should install four stiffener gussets on the inlet nozzle. These gussets should be welded to the flange, the nozzle and to the silencer end head. A special silencer with factory installed gussets may be ordered if desired. Likewise, if the silencer outlet is to support a long tailpipe with no lateral support, the outlet nozzle of the silencer should have gussets. A tailpipe of maximum length equal to six times the silencer size may be supported free standing without gussets. For example, a 12” silencer without gussets can support a 72” long free standing tailpipe.

For horizontal silencer installations, the silencer may be supported by factory installed saddles or bracket supports. However, the user may choose to support the silencer with two body bands, which are attached to overhead hanger rods. For vertical silencer installations, the silencer may be supported by factory installed legs, trunnions, or bracket supports.

Silencer Common to More than One Engine

It is recommended that a silencer never be connected to more than one engine at a time.

Water in the Exhaust System

Design of the exhaust system must be such that water is not allowed to flow back into the engine. Silencers are not specifically designed to prevent the flow of water back into the engine. With some configurations, the silencer body may become a water trap and for this reason, drain couplings are provided on some models. However, the presence of a drain coupling does not mean that the silencer will prevent water from flowing back into the engine.

Insulation of Silencer Body: Caution!

A typical engine exhaust system has gas temperatures between 500°F and 1,200° F. A typical uninsulated silencer will have an outside skin temperature between 400° F and 900° F. An approximate value for the amount of heat transmitted through the silencer walls is 2.0 BTU per hour per square foot of surface area per °F difference between the gas temperature and the outside air temperature. In view of the above considerations, the user often elects to insulate the silencer body to either reduce the external skin temperature or to reduce the amount of heat transmittal. However, insulating the silencer body will mean that the silencer shell temperature will be almost as hot as the gas temperature. Since carbon steel scales and deteriorates very rapidly when its temperature exceeds 1,000° F, the user must be aware of the possible consequences of insulating a silencer that operates with gas temperatures above 1,000° F. Stainless steel construction is advised under these circumstances. If burn protection of personnel is the main reason for insulating, the user should use an expanded metal safety shield rather than insulation.

Pressure Testing

Unless specified in the customers purchase requirements, a silencer is not pressure tested. If it is mandatory that absolutely no leakage is to be permitted, the silencer should be purchased with specifications requiring pressure testing at the factory.

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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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.

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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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