IEC 60534-8-2:2011

IEC 60534-8-2 ®
Edition 2.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 8-2: Noise considerations – Laboratory measurement of noise generated by
hydrodynamic flow through control valves

Vannes de régulation des processus industriels –
Partie 8-2: Considérations sur le bruit – Mesure en laboratoire du bruit créé par
un écoulement hydrodynamique dans une vanne de régulation

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IEC 60534-8-2 ®
Edition 2.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 8-2: Noise considerations – Laboratory measurement of noise generated by
hydrodynamic flow through control valves

Vannes de régulation des processus industriels –
Partie 8-2: Considérations sur le bruit – Mesure en laboratoire du bruit créé par
un écoulement hydrodynamique dans une vanne de régulation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 17.140.20; 23.060.40; 25.040.40 ISBN 978-2-88912-709-2

– 2 – 60534-8-2  IEC:2011
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols . 7
5 General test criteria . 7
5.1 General . 7
5.2 Pressure regulating devices . 8
5.3 Test specimen insulation . 8
5.4 Test section piping . 8
5.5 Pressure taps . 8
5.6 Acoustic environment . 8
5.7 Instrumentation . 8
6 External sound pressure measurement . 9
6.1 General . 9
6.2 Instrumentation for noise measurement . 9
6.3 Test data accuracy . 9
6.4 Test data . 9
7 Internal sound pressure measurement . 10
7.1 Test system . 10
7.2 Instrumentation for noise measurement . 10
7.3 Test fluid . 10
7.4 Background noise . 11
7.5 Sound level sensor position . 11
7.6 Test data accuracy . 11
7.7 Test data . 11
7.8 Accuracy . 12
7.9 Data evaluation . 12
8 Determination of the characteristic pressure ratio x . 12
Fz
8.1 General . 12
8.2 Test procedures . 12
8.2.1 Test fluid . 12
8.2.2 Test conditions for determination of x . 13
Fz
8.3 Determination of x . 13
Fz
8.3.1 Peak frequency method . 13
8.3.2 A-weighted method . 13
Bibliography . 22

Figure 1 – System components for control valve closed loop and open loop noise test . 15
Figure 2 – Test arrangements with specimen outside and (alternatively) inside acoustic
environment . 17
Figure 3 – Typical curve for characteristic pressure ratio x . 18
Fz
Figure 4 – Reference test orifice plate (see 8.2.1) . 18
Figure 5 – Determination of x by peak frequency method (see 8.3.1) . 19
Fz
60534-8-2  IEC:2011 – 3 –
Figure 6 – Determination of x by measuring the overall L , dB(A), at a constant
Fz pA
valve travel . 20
Figure 7 – Mounting position of the sound level meter in the pipe for ∆h < 0,5 mm . 21

– 4 – 60534-8-2  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 8-2: Noise considerations –
Laboratory measurement of noise generated
by hydrodynamic flow through control valves

FOREWORD
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