Penn Separator SP Silencer
The gas enters the inlet of the silencer where the flow is disbursed through the inlet diffuser tube into hundreds of small jet flows. This provides for quite flow of the gas into the silencer and the first stage silencing chamber. The diffuser also directs the flow toward the outer walls of the silencer body. The gas then repeats the same process contracting and expanding into the second stage chamber. The second chamber reacts with the noise the same way as the first chamber dissipating and absorbing the noise that is left over. The second chamber also has an important function as a reflow area. It allows for an even flow of gas to the outlet. This assures the quiet release of gases to the atmosphere trough an adequately sized outlet.
Each silencer reduces noise differently. The larger the size, the higher the reduction. These reductions range from 24 to 46dB (A) depending on the model. The following page gives these combined reductions as well as sizing information, and suggested specifications, and dimensions.