Chamber Type Silencers

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 exhaust piping.
Silencer Models
M22 Residential grade chamber type silencer. Use a model M22 in residential and light industrial areas where background noise is relatively high and constant and the need for higher degrees of silencing is minimal. Expected attenuation is 20 to 25 dBA.
M32 Semi-Critical grade chamber type silencer. Use a model M32 in residential areas where background noise is present but not objectionable. In these areas, installation of an M32 on an engine exhaust is intended to bring the noise level down to match the ambient noise levels. Expecteded attenuation is 25 to 32 dBA.
M42 Critical grade chamber type silencer. Use a model M42 for quiet residential areas where background noise is relatively low and “critical� grade silencing is required. Expected attenuation is 30 to 38 dBA.
M52 Hospital grade chamber type silencer. Use a model M52 for “hospital grade� noise reduction in heavy industrial areas where machinery operates continously around quiet locality. Such as hospitals, shools and quiet residential districts. Expected attenuation is 35 to 42 dBA.
M62 Hospital plus grade chamber type silencer. Use a model M62 for the highest degree of silencing in areas requiring “hospital plus� noise reductions. The M62 is presently the top-of-the-line silencer without resorting to multiple silencers in series or custom designed silencers. Expected attenuation is 35 to 50 dBA.

Compact Chamber Silencers

Compact chamber silencers are engineered to provide “critical� to "hospital" grade attenuation, while minimizing space usage. They are an excellent choice 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. These units feature 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 are available upon request. Standard material is carbon steel, but stainless steel construction is available.
Silencer Models
MD32 Expected attenuation is 25-32 dBA
MD42 Expected attenuation is 30-37 dBA
MD52 Expected attenuation is 35-42 dBA

Thin Line Chamber Silencers

Thin Line chamber silencers are engineered to provide “critical� to "hospital" grade attenuation, while minimizing space usage. They are an excellent choice enclosures and marine applications where height and 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. These units feature 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 are available upon request. Standard material is carbon steel, but stainless steel construction is available.
Silencer Models
MR32 Expected attenuation is 25-35 dBA
MR42 Expected attenuation is 30-30 dBA
MR52 Expected attenuation is 35-50 dBA
MR62 Expected attenuation is 35-55 dBA

Chambered Spark Arresting Silencers

Spark arresting applications include marine service, refineries and other hazardous environments. These units have chamber type designs. The retention of hot carbon and soot particles minimizes danger and helps provide a cleaner area and atmosphere.
Silencer Models
MSA11 Residential grade chamber type, spark arresting silencer. Usa a model MSA11 in residential and light industrial areas for spark arresting capability where background noise is relatively high and constant and the need for higher degrees of silencing is minimal. Expected attenuation is 20 to 25 dBA.
MSA22 Semi-Critical grade chamber type, spark arresting silencer. Use a model MSA22 in residential areas where background noise is present but not objectionable and a spark arresting feature is desired. In these areas, installation of an MSA22 on an engine exhaust is intended to bring the noise level down to match the ambient noise levels. Expected attenuation is 25 to 32 dBA.
MSA33 Critical grade chamber type, spark arresting silencer. Use a model MSA33 for quiet residential areas where background noise is relatively low and “critical� grade silencing with a spark arresting feature is required. Expected attenuation is 30 to 38 dBA.
MSA44 Hospital grade chamber type, spark arresting silencer. Use a model MSA44 for areas requiring “hospital grade� noise reductions and a spark arresting feature. The MSA44 is presently the top-of-the-line reactive silencer without the addition of accoustical insulation. Expected attenuation is 35 to 42 dBA.
MSA55 Hospital plus grade chamber type, spark arresting silencer. Use a model MSA55 for the highest degree of silencing in areas requiring both “hospital plus grade� noise reductions and a spark arresting feature. Expected attenuation is 35 to 50 dBA.

Low Pressure Drop/Turbo Silencers

Straight through silencers have an unobstructed passage through the silencer with no flow reversal. 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 an increase in pressure drop and price. Noise attenuation provided by straight through design is less than that provided by chamber design silencers incorporating a flow reversal. As a result, the MT series is best used in applications where low pressure drop is the primary consideration.
Silencer Models
MT22 Residential grade straight through, low pressure drop silencer. Use an MT22 for silencing in areas where background noise is relatively high and moderate silencing is needed and requirements call for a low pressure drop silencer. Expected attenuation is 20 to 25 dBA.
MT32 Semi-Critical grade straight through, low pressure drop silencer. Use an MT32 for average silencing in areas where some background noise is always present and effective, but not complete, silencing is needed and requirements call for a low pressure drop silencer. Expected attenuation is 25 to 32 dBA.
MT42 Critical grade straight through, low pressure drop silencer. Use an MT42 for better than average silencing in areas where ambient noise is relatively low and back pressure requirements call for a low pressure drop silencer. Expected attenuation is 30 to 38 dBA.
MT52 Hospital grade straight through, low pressure drop silencer. Use an MT52 for "hospital grade" noise reduction in areas where ambient noise is relatively low and back pressure requirements call for a low pressure drop silencer. Expected attenuation is 35 to 42 dBA.

Blower Silencers

Featuring a highly efficient acoustic design, the MB series is used to reduce the noise radiating from blower piping or the blower opening. Typical applications are rotary positive blower intake and discharge, vacuum pump intake and discharge, and centrifugal blower intake and discharge.
Silencer Models
MB11 With its straight through acoustically packed design the MB11 offers good silencing for many blower applications. Typical attenuation is 15 to 30 dBA.
MB21 An efficient economical design, the MB21 is useful for blower noise reduction in applications where some background noise is always present and high degrees of silencing is not required. Typical attenuation is 15 to 30 dBA.
MB31 A 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.

Marine Engine/Wet Exhaust Silencers

Constructed of 316L 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 200 oF. The MP11 may be installed in series with an MP31 or MP41 to provide additional attenuation.
Silencer Models
MP11 Low pressure drop with good performance. Expected attenuation is 15 to 18 dBA.
MP31 Medium pressure drop with better performance. Expected attenuation is 20 to 25 dBA.
MP41 Highest performance for wet exhaust application. Expected attenuation is 30 to 35 dBA.
 
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