EN 60534-8-4:2005
(Main)Industrial-process control valves - Part 8-4: Noise considerations - Prediction of noise generated by hydrodynamic flow
Industrial-process control valves - Part 8-4: Noise considerations - Prediction of noise generated by hydrodynamic flow
Establishes a method to predict the noise generated in a control valve by liquid flow and the resulting noise level measured downstream of the valve and outside of the pipe.
Stellventile für die Prozessregelung - Teil 8-4: Geräuschbetrachtungen - Vorausberechnung der Geräuschemission für flüssigkeitsdurchströmte Stellventile
Vannes de régulation des processus industriels - Partie 8-4: Considérations sur le bruit - Prévision du bruit généré par un écoulement hydrodynamique
Etablit une méthode pour prévoir le bruit engendré dans une vanne de régulation par un écoulement liquide et le niveau de bruit mesuré en aval de la vanne et à l'extérieur de la tuyauterie. Le bruit peut être généré à la fois par des turbulences normales et par la cavitation du liquide dans la vanne.
Regulacijski ventili za industrijske procese - 8-4. del: Šum - Predvidevanje šuma, ki ga proizvaja hidrodinamični pretok (IEC 60534-8-4:2005)
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Standards Content (Sample)
SLOVENSKI SIST EN 60534-8-4:2007
STANDARD
januar 2007
Regulacijski ventili za industrijske procese - 8-4. del: Šum - Predvidevanje
šuma, ki ga proizvaja hidrodinamični pretok (IEC 60534-8-4:2005)
(istoveten EN 60534-8-4:2005)
Industrial-process control valves - Part 8-4: Noise considerations - Prediction of
noise generated by hydrodynamic flow (IEC 60534-8-4:2005)
ICS 17.140.20; 23.060.40; 25.040.40 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 60534-8-4
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2005
ICS 23.060.40; 17.140.20; 25.040.40 Supersedes EN 60534-8-4:1994
English version
Industrial-process control valves
Part 8-4: Noise considerations -
Prediction of noise generated by hydrodynamic flow
(IEC 60534-8-4:2005)
Vannes de régulation Stellventile für die Prozessregelung
des processus industriels Teil 8-4: Geräuschbetrachtungen -
Partie 8-4: Considérations sur le bruit - Vorausberechnung der Geräuschemission
Prévision du bruit généré für flüssigkeitsdurchströmte Stellventile
par un écoulement hydrodynamique (IEC 60534-8-4:2005)
(CEI 60534-8-4:2005)
This European Standard was approved by CENELEC on 2005-11-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60534-8-4:2005 E
Foreword
The text of document 65B/556/FDIS, future edition 2 of IEC 60534-8-4, prepared by SC 65B, Devices,
of IEC TC 65, Industrial-process measurement and control, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 60534-8-4 on 2005-11-01.
This European Standard supersedes EN 60534-8-4:1994.
The noise prediction methods for hydrodynamic flow presented in this standard have been revised.
The improvements are mainly in the acoustic efficiency factors for cavitating flow for single orifice,
multi-stage and multi-hole trims and in the determination of transmission losses. This revised standard
permits the prediction of the noise pressure levels by calculation without the need for coefficients
determined by testing.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-11-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60534-8-4:2005 was approved by CENELEC as a
European Standard without any modification.
__________
- 3 - EN 60534-8-4:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60534-1 - Industrial-process control valves EN 60534-1 2005
Part 1: Control valve terminology and
general considerations
1) 2)
IEC 60534-8-2 - Part 8: Noise considerations EN 60534-8-2 1993
Section 2: Laboratory measurement of
noise generated by hydrodynamic flow
through control valves
1) 2)
IEC 60534-8-3 - Part 8-3: Noise considerations - Control EN 60534-8-3 2000
valve aerodynamic noise prediction
method
1)
Undated reference.
2)
Valid edition at date of issue.
NORME CEI
INTERNATIONALE
IEC
60534-8-4
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2005-08
Vannes de régulation des processus
industriels –
Partie 8-4:
Considérations sur le bruit –
Prévision du bruit généré par
un écoulement hydrodynamique
Industrial-process control valves –
Part 8-4:
Noise considerations –
Prediction of noise generated
by hydrodynamic flow
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microfilms, sans l'accord écrit de l'éditeur. the publisher.
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МеждународнаяЭлектротехническаяКомиссия
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60534-8-4 ” IEC:2005 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION . 11
1 Scope. 13
2 Normative references. 13
3 Symbols . 15
4 Preliminary calculations . 19
4.1 Pressures and pressure ratios. 19
4.2 Characteristic presssure ratio x . 19
Fz
4.3 Valve style modifier F . 21
d
4.4 Jet diameter D . 21
j
4.5 Jet velocity . 21
4.6 Mechanical power W . 21
m
5 Noise predictions. 23
5.1 Internal noise. 23
5.2 Transmission loss . 25
5.3 External noise. 27
5.4 Frequency distribution (internal and external). 27
6 Multistage trim. 29
6.1 General. 29
6.2 Preliminary calculations . 29
6.3 Prediction of noise level. 31
Annex A (informative) Examples . 45
Bibliography. 55
Figure 1 – Examples of multistage trim in globe and rotary valves . 33
Figure 2 – Example of fixed multistage device with increasing flow area. 35
Figure 3 – Example of multistage trim in globe valve . 37
Figure 4 – Globe valves (cage trim. V-port-plug). 39
Figure 5 – Globe valves (parabolic-plug). 39
Figure 6 – Multihole trims. 41
Figure 7 – Eccentric rotary valves . 41
Figure 8 – Butterfly valves. 43
Figure 9 – Segmented ball valve – 90° travel. 43
Figure A.1 – Influence of x value on prediction accuracy. 53
Fz
Table 1 – Numerical constants N. 21
Table 2 – Acoustic power ratio r . 21
W
Table A.1 – Calculation examples . 47
60534-8-4 IEC:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS CONTROL VALVES –
Part 8-4: Noise considerations –
Prediction of noise generated by hydrodynamic flow
FOREWORD
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International Standard IEC 60534-8-4 has been prepared by subcommittee 65B: Devices, of
IEC technical committee 65: Industrial-process measurement and control.
This second edition cancels and replaces the first edition published in 1994. This edition
constitutes a technical revision.
The noise prediction methods for hydrodynamic flow presented in this standard have been
revised. The improvements are mainly in the acoustic efficiency factors for cavitating flow for
single orifice, multi-stage
...
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