The silencer will be designed so that the inlet flange and diffuser are matched to the discharge rating of the valve. We can work with you to obtain a more cost-effective valve and piping system by using a restrictive diffuser or orifice plate to stage the system pressure drop. For conservatism, vent silencers with restrictive diffusers are designed with pressure ratings that match the PSV inlet pressure rating. Also, you should assure yourself by reviewing the valve manufacturer's data sheet that the control valve will not malfunction from the rated back pressure of the restrictive diffuser you specified. These silencers are welded heavy-duty fabrications.
All materials are free from rust, weld splatter, mill scale, and other contaminants.
The inlet nozzle and diffuser are constructed of steel and are welded. The diffuser provides controlled pressure expansion to atmosphere and provides uniform flow distribution through the acoustic section of the silencer. The inner shell is solid to prevent shell-radiated noise and migration of the acoustic fill. The transmission loss across the plenum and bottom head is comparable to the silencer attenuation. All rights reserved.