The prime requirement for
a vent silencer is its ability to handle with total reliability
the rapid release of large quantities of steam from high pressure
to atmosphere and attenuating high levels of noise generated at
the vent for steam at wide range of pressure and temperature conditions.
The silencers are made out of concentric annular acoustic cylinders
enclosed with a robust steel casing with dished end or flat end
at one end.
The fluid enters through
the diffuser and passes through the annular space between the acoustic
packing where the sound energy is absorbed. The straight flow path
through the annular acoustic cylinders ensure minimum pressure drop.
A weather cowl for rain protection is available as an optional item.