January 2008

Valves/Piping

Improvement of IEC 60534-8-3 standard for noise prediction in control valves

Fairly simple changes lead to a considerable improvement in accuracy

The current IEC 60534-8-3 standard for predicting aerodynamic noise in control valves regulating the flow of gases and vapors is being revised by Working Group 9 of the IEC Subcommittee 65B. The tests described in reference 1 established that the present standard can lead to considerable inaccuracies concerning the predicted sound pressure level. A similar conclusion was drawn at previous meetings of the above mentioned working group and at a seminar held by Valve World magazine.2 In this article, possible improvements are described. THE CURRENT IEC 60534-8-33 The currently valid version of this standard is mainly based on publications written by Lighthill4 and Reethoff.5 The standard co

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