Silencers with Multi-Stage Diffusers :
The expansion of gas, steam or air, generates unacceptable noise levels and the control valves are subjected to severe pressure drops. The noise originates at the exit of the expansion opening as a result of sonic gas stream. Today silencers are mounted after relief valves to reduce the enormous noise pollution to a bearable value and also elimination of severe pressure drops in valves. Such equipment is needed in power stations, chemical, petrochemical or similar plants.