Industrial-process control valves. Noise considerations -- Control valve aerodynamic noise prediction method
IEC 60534-8-3:2010 establishes a theoretical method to predict the external sound-pressure level generated in a control valve and within adjacent pipe expanders by the flow of compressible fluids.
This method considers only single-phase dry gases and vapours and is based on the perfect gas laws. It is assumed that the downstream piping is straight for a length of at least 2 m from the point where the noise measurement is made.
The method is applicable to the following single-stage valves:
Specifically excluded are the full bore ball valves where the product FpC exceeds 50 % of the rated flow coefficient.
This third edition cancels and replaces the second edition published in 2000. This edition constitutes a technical revision.
The significant technical changes with respect to the previous edition are as follows:
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