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Venting high pressure gas or
steam to atmosphere during a plant startup or
shutdown generates unacceptable noise levels and
subjects the vent
valve to severe pressure drops. Use of a D800
High Pressure Silencer will greatly reduce the
steam vent noise (or the gas vent noise) and create a back pressure on the vent
valve to reduce the wear and tear on the valve.
The D800 Diffuser can be used as
steam vent silencer to eliminate the vent noise
or a gas blowdown silencer to
eliminate the blowdown noise. It can also be
used as a safety valve silencer. |
CU Services Vent Diffuser
Silencer Systems are different: |
- The gas pressure can be reduced in several stages within the piping system before the gas reaches the exit. This procedure reduces the amount of the final attenuation required.
- The vent valve can be specified for a much smaller flowing pressure drop which will result in reduced first cost and maintenance costs.
- Each stage is designed to prevent choked flow thus preventing the noise-generating shock waves.
- Each stage of pressure reduction inside the pipe greatly reduces the final pressure to reach the exit and thus greatly reduces the exit noise level.
- The peak frequency is increased because it scales inversely with the jet diameter ( f a 1/d).
- The increase in frequency of the exiting fluid stream is f2/f1 a v N where N is the number of holes. For example, for a plate with 24 holes, the peak frequency, f2, will be 4.9 times higher than the peak frequency of a single hole, f1, passing the same amount of fluid.
- Thus, with multiple holes the resulting higher frequency greatly reduces the potential to excite the downstream piping and also makes the noise easier to dissipate in the atmosphere.
- Unlike stacked plate diffusers, the holes is the CU Services vent diffuser are sized to reduce the possibility of clogging.
- These steam vent diffuser silencers can be located horizontally or vertically or in any combination to minimize the support requirements and allows flexibility in the piping arrangement.
- The diffuser silencers are constructed of the highest quality 316 SS to ensure a long and trouble free life.
- There are no pressure and temperature limits.
- Each system is custom designed to produce a lightweight, compact, and economical system that requires no maintenance.
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 For
a quotation, please provide the following
information:
Medium: Steam? Other ________________ Flow rate: _______________lb/h
Silencer Inlet pressure:
___________psi Silencer Inlet Temperature: ________F
Line size: ____inch Sch_____
Silencer
connection: BW
or Flange
{150#? 300# Other ___________}
Noise requirement: ____ dBA at
_____ft Any other requirements |
CU Services LLC | 725 Parkview Cir. | Elk Grove Vlg, IL 60007
Phone: 847.439.2303
Copyright © 1971 - 2004 CU Services LLC & Thermal Analysis Systems Co. All rights reserved.
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