Industrial-process control valves - Part 8-1: Noise considerations - Laboratory measurement of noise generated by aerodynamic flow through control valves (IEC 60534-8-1:2005); German version EN 60534-8-1:2005 / Note: DIN EN 60534-8-1 (2001-12) remains ...

2Scope / Description

This part of IEC 60534-8 defines apparatus, procedures, and methods for measuring airborne noise generated when compressible fluid flows through control valves and/or connected piping configurations (including fixed flow resistance). Control valves that discharge directly to the atmosphere are not included in this standard. Method A provides a uniform procedure for measuring the radiated noise of control valves and their connected piping, allowing for comparison of various measurement results, which is beneficial to both users and manufacturers. The noise standard is expressed by determining the sound pressure level of the control valve under test. Method B is a method for measuring the sound pressure level in the piping system on the inlet and outlet sides of a control valve under given operating conditions. This method is preferred for determining the acoustic characteristics of valves because it eliminates errors caused by pipe insulation. The noise characteristics to be determined have the following uses: a) comparing the operating modes of different control valves; b) planning noise reduction measures; c) determining the acoustic characteristics of valves and valve combinations; d) reliably designing silencers; e) evaluating the potential impact of control valve acoustic emissions on ultrasonic flow meters.