Absorptive Design Intake Silencers

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 including 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 or FPSE installed in series with an M-line chamber type silencer can provide 10-20 dBA enhancement of the overall engine noise attenuation. Addition of an absorptive design silencer may improve the overall attenuation of the system by 10 to 20 dBA.


Silencer Models
FP/FPE Straight through, absorptive silencer design with no center panel for low pressure drop service. Expected attenuation is 20 dBA.
FPC/FPCE Similar 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/FPSE Designed 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.

Inline Silencers

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. The ILL is a low pressure drop silencer while the ILM offers a reduced package size.


Silencer Models
ILL-20 Provides good silencing when properly installed with pressure reducing valves and on centrifugal compressor discharges.
ILL-30 Provides a very high level of silencing when properly installed with pressure reducing valves and on centrifugal compressor discharges.
ILM-15 Provides good silencing when properly installed with pressure reducing valves and on centrifugal compressor discharges.
ILM-25 Provides a very high level of silencing when properly installed with pressure reducing valves and on centrifugal compressor discharges.
 
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