Blow-off silencers
When highly pressurised vapour and gaseous media are vented freely, kinetic energy is released in the form of alternating oscillations with large pressure amplitudes. This results in extremely high sound pressure levels, which must be reduced by appropriate measures.
The effective noise reduction achieved by our blow-off silencers is essentially based on a throttling system located directly behind the silencer inlet pipe (multi-stage expansion chamber). Several throttle cross-sections are flowed through radially. Each throttle cross-section forms a pressure reduction stage. The number of pressure reduction stages depends on the level of the inlet pressure and the required noise reduction.
The high inlet pressure is reduced to an absolute pressure of approx. 1.1 bar across all expansion stages. With appropriate dimensioning of the expansion stages and the downstream absorbing silencer baffles, sound level reductions of over 60 dB can be achieved.
The dimensions, especially of the pressure-bearing parts of the silencer, are determined individually for each silencer in accordance with domestic and international design rules. The material is selected based on the temperatures and pressures that occur.
Provide us with valve data and noise limits. We will be happy to work out a proposal for you:
- Gas or steam volume per hour
- Temperature and pressure upstream of the silencer or valve
- Diameter of the inlet pipe
- Permissible sound pressure level at the point of immission (please specify distance).
