IEC 60534-8-2:2011

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

IEC 60534-8-2:2011 includes the method for measuring the sound pressure level due to liquid flow through a control valve and the method for determining the characteristic increase of noise due to the onset of cavitation. It also defines the equipment, methods and procedures for the laboratory measurement of the airborne sound needed to determine these characteristics. Two methods are provided for testing the noise generating characteristics of control valves. The first is a uniform method of measuring the radiated noise from the valve and the associated test piping including fixed flow restrictions through which the test fluid (water) is passing. The second is a procedure for measuring the sound pressure levels within pipe systems upstream and downstream of the valve under fixed operating conditions. This second edition cancels and replaces the first edition published in 1991 and constitutes a technical revision that includes internal noise measurement.

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

La CEI 60534-8-2:2011 décrit la méthode de mesure du niveau de pression acoustique dû à un débit de liquide au travers d'une vanne de régulation, et la méthode de détermination de l'augmentation caractéristique du bruit due au début de la cavitation. Elle définit également l'équipement, les méthodes et procédures de mesure en laboratoire du bruit aérien, nécessaires à la détermination de ces caractéristiques. Deux méthodes d'essai pour les caractéristiques de génération de bruit des vannes de régulation sont fournies. La première est une méthode uniforme de mesure du bruit rayonné par la vanne et la tuyauterie d'essai associée, y compris les restrictions fixes au travers desquelles passe le fluide d'essai (eau) (voir Note 1). La seconde consiste en une procédure de mesure des niveaux de pression acoustique dans les tuyauteries en amont et en aval de la vanne, dans des conditions de fonctionnement fixes. Cette deuxième édition annule et remplace la première édition parue en 1991, et constitue une révision technique qui inclut la mesure du bruit interne.

General Information

• Status: Published
• Publication Date: 11-Oct-2011
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 23.060.40 - Pressure regulators
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: SC 65B - Measurement and control devices
• Drafting Committee: WG 9 - TC 65/SC 65B/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 31-Oct-2011
• Completion Date: 12-Oct-2011

Standards Content (Sample)

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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