IEC 60534-8-3:2010

IEC 60534-8-3 ®
Edition 3.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 8-3: Noise considerations – Control valve aerodynamic noise prediction
method
Vannes de régulation des processus industriels –
Partie 8-3: Considérations sur le bruit – Méthode de prédiction du bruit
aérodynamique des vannes de régulation

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IEC 60534-8-3 ®
Edition 3.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 8-3: Noise considerations – Control valve aerodynamic noise prediction
method
Vannes de régulation des processus industriels –
Partie 8-3: Considérations sur le bruit – Méthode de prédiction du bruit
aérodynamique des vannes de régulation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 17.140.20; 23.060.40; 25.040.40 ISBN 978-2-88912-241-7
– 2 – 60534-8-3 ã IEC:2010
CONTENTS
FOREW ORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normativ e references . 7
3 Terms and definitions . 8
4 Symbols . 9
5 Valves with standard trim . 12
5.1 Pressures and pressure ratios. 12
5.2 Regime definition . 13
5.3 Preliminary calculations . 14
5.3.1 Valve style modifier F . 14
d
5.3.2 Jet diameter D . 14
j
5.3.3 Inlet fluid density r
............................................................................ 14
5.4 Internal noise calculations . 15
5.4.1 Calculations common to all regimes . 15
5.4.2 Regime dependent calculations . 16
5.4.3 Downstream calculations . 18
5.4.4 Valve internal sound pressure calculation at pipe wall . 19
5.5 Pipe transmission loss calculation. 20
5.6 External sound pressure calculation . 21
5.7 Calculation flow chart . 22
6 Valves with special trim design . 22
6.1 General . 22
6.2 Single stage, multiple flow passage trim . 22
6.3 Single flow path, multistage pressure reduction trim (two or more throttling
steps) . 23
6.4 Multipath, multistage trim (two or more passages and two or more stages) . 25
7 Valves with higher outlet Mach numbers . 27
7.1 General . 27
7.2 Calculation procedure . 27
8 Valves with experimentally determined acoustical efficiency factors . 28
9 Combination of noise produced by a control valve with downstream installed two
or more fixed area stages . 29
Annex A (informative) Calculation examples . 31
Bibliography . 46

Figure 1 – Single stage, multiple flow passage trim . 23
Figure 2 – Single flow path, multistage pressure reduction trim . 24
Figure 3 – Multipath, multistage trim (two or more passages and two or more stages) . 26
Figure 4 – Control valve with downstream installed two fixed area stages . 30

Table 1 – Numerical constants N . 15
Table 2 – Typical values of valve style modifier F (full size trim) . 15

d
Table 3 – Overview of regime dependent equations . 17

60534-8-3 ã IEC:2010 – 3 –
Table 4 – Typical values of A and St . 18
h p
Table 5 – Indexed frequency bands . 19
Table 6 – Frequency factors G (f) and G (f) . 21
x y
Table 7 – “A” weighting factor at frequency f . 22
i
– 4 – 60534-8-3 ã IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 8-3: Noise considerations –
Control valve aerodynamic noise prediction method

FOREWORD
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International Standard IEC 60534-8-3 has been prepared by subcommittee 65B:
Measurements and control devices, of IEC technical committee 65: Industrial-process
measurement, control and automation.
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:
· predicting noise as a function of frequency;
· using laboratory data to determin
...