Natural gas silencers are used to control of noise that arises during venting of natural gases.

The silencers are made up of concentric annular acoustic cylinders enclosed with a robust steel casing with one end dished or flat end and the other end open to atmosphere.

The process gas enters the silencer through a diffuser and passes through the annular space between the acoustic packing where the sound energy is absorbed and escapes to the atmosphere. A weather cowl and bird screen is provided at the outlet of the silencer.