A Guide for Specifying and Selecting Vent and Blowdown Silencers

EI Williams custom designs and custom builds silencers for your needs including vent silencers, engine silencers, fan silencers and industrial silencers to meet all system requirements.

(firmenpresse) - If you're tasked as an engineer to create a specification for the buy of a vent or blowdown silencer, it can appear somewhat overwhelming because of the higher mass flows, pressures and temperatures involved. It doesn’t have to be. This short article will define a vent silencer specification information sheet and go over each and every of the crucial fields that have to be completed on the kind, such as background considerations. The information and facts imparted encompasses the applied knowledge of acoustical theoreticians and vent silencer market practitioners from more than the final 50 years. The outcome should really be a superior understanding in the factors involved and info needed to specify and pick the acceptable vent silencer to get a given application, devoid of over- or under-designing it.



This short article defines a vent silencer specification data sheet and covers each with the critical fields that has to be completed around the kind. These fields include those that have to be identified by the purchaser and those that must be supplied by the silencer vendor. Understanding all of the variables involved will make to less complicated for you to select the ideal vent silencer for the application at hand. But 1st, we'll introduce vent and blowdown silencers and review the basic factors involved in predicting the noise generated by high-pressure vents. Listed right here are the vent and blowdown applications that require silencers:



• Steam venting in power generation applications

• Natural gas compressor station and pipeline blowdowns

• Procedure control and relief valves in industrial applications

• Blowdown tanks and autoclaves

• Bypass valves on blowers and compressors

• Steam ejectors and hogging vents

• Discharge of high-pressure gas to substantially decrease pressure atmosphere (atmosphere).



The high-pressure gas might be steam or organic gas, which accounts for greater than 90% of your applications, too as air, nitrogen, oxygen, hydrogen, carbon dioxide, combinations thereof, along with other gases.

Note that the terms “vent silencer” and “blowdown silencer” refer towards the application for which every is used. They're equivalent silencer designs and are referred to as vent silencers when becoming used to vent at a constant flow price for a period of time. They are known as blowdown silencers after they are blowing down a finite volume of gas starting at a higher pressure and ending at a low pressure over a offered time. Vent silencers are sized for constant flow and blowdown silencers are sized for maximum flow. Noise Generated by High-Pressure Vents Over the years, there has been a great deal of operate carried out in the field of predicting the noise generated by the high-pressure venting of gases. This has resulted in the development of many empirical models supported by field proof and tabular information around the topic. You will find a number of open sources inside the public domain offering access to these models and databases. We are going to not review these models but will touch on the key factors involved in predicting the noise generated by higher pressure vents.



Elements Influencing Noise Generated by High-Pressure Vents.



• Mass flow - the greater the mass flow, the noisier it becomes.

• The type of gas and its molecular weight/specific gravity - lighter gases are noisier.

• Temperature - higher temperatures result in lighter gas flows, and therefore, greater noise levels.

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Datum: 04.12.2019 - 16:20 Uhr
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