Inline silencer
Kilometres of gas-filled pipes are among the most significant sources of noise in many industrial plants. The main noises in pipelines are caused by compressors, blowers and control valves installed in these pipelines. The use of pipeline silencers can acoustically isolate the pipes from these noise sources, whereby the transmission of both the gas noise in the pipe and the structure-borne noise on the surface of the pipe must be effectively attenuated.
After numerous investigations and measurements, we developed a pipe silencer that effectively meets the above requirements.
Instead of mineral wool, this type of silencer uses heavy-duty fabrics that are not directly exposed to the flow. This ensures that the fluid cannot be contaminated by particles carried along by the silencer; in most applications, this is essential in order to prevent damage to downstream components (e.g. valves) and to maintain the guaranteed insertion loss over the long term. Alternatively, conventional pipe silencers can be offered for non-critical applications.
The silencers are equipped with centre baffles for large nominal diameters and high acoustic requirements in the high-frequency range. The silencers have proven themselves in a wide range of applications over the long term. In combination with a steam or gas reducing valve, the insertion loss can be further increased via upstream throttling stages, offering a cost-effective complete solution together with the valve.
Each silencer is designed for individual applications based on the operating data and precise gas parameters. The design is carried out using in-house computer programs, whose performance has been confirmed by numerous measurements on completed silencers. We have our own test benches for measuring acoustic and fluidic parameters on reflection and pipe silencers.
Advantages of our pipe silencers:
- Use of fabric instead of fibre material for sound attenuation; this means that the silencers can be used in all piping systems and are easy to clean if necessary
- Very high flow velocities are possible
- Available in all nominal diameters and nominal pressures required in practice
- Very compact design with maximum attenuation
- High structure-borne sound attenuation thanks to special internal components
- Cost-effective complete solution thanks to upstream throttle stage packages in conjunction with optimisation of the pressure reducing valves to equalise the pressure reduction and increase the acoustic insertion loss.
What enquiry details are required:
- Technical data on the sound source and the pipeline
- Medium, operating density, isentropic exponent [kg/m³]
- Operating pressure before and after the sound source [barü; °C]
- Length of the pipeline between the sound source and the silencer [m]
- If applicable, sound power level in the pipeline after the sound source [dB(A)]
- Required level reduction [dB] or
- Permissible sound power level behind the silencer [dB(A)]
- Permissible pressure loss [bar]
