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.
||Straight through, absorptive silencer design with no center panel for low pressure
drop service. Expected attenuation is 15 to 20 dBA.|
||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.|
||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.||
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.
|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.|