Positive Displacement blowers have two impellers that trap a “pocket” of air each time they sweep by the inlet and discharge connection. A pressure pulse is created each time this occurs. This pressure pulse creates noise and vibration. Blower silencers can be used to reduce this noise and vibration.
Silencers are typically used on the inlet and discharge of a positive displacement blower used for pressure applications. A discharge silencer is typically used on a vacuum application.
There are three basic types of silencers used to reduce the noise and vibration generated by the pressure pulse: Chamber Type, Chamber Absorptive Type, and Absorptive Type. Click to read more about the differences between these silencer types.