The silencers shown on this page are more fully described in Catalog 244 and for vacuum applications in Catalogs 280 and 285.
Pulsation is more pronounced on the discharge side of the blower.
Peak pulse pressures are quite severe and can result in unsilenced discharge sound power levels up to 140-145 dB. The inlet produces less severe pulsation and noise but often needs attenuation comparable to that at the discharge. There is little question that silencers are necessary on any blower installation. Regardless of the size or speed of the blower, there is a need for both inlet and discharge silencers. While the discharge silencers are shown in the pictures, similar designs are also available for the inlet of the blower. The silencer must be the proper type for the given application Meeting these conditions is more completely addressed in Catalog Number 244.