EN 60534-2-5:2003
(Main)Industrial-process control valves - Part 2-5: Flow capacity - Sizing equations for fluid flow through multistage control valves with interstage recovery
Industrial-process control valves - Part 2-5: Flow capacity - Sizing equations for fluid flow through multistage control valves with interstage recovery
Gives equations for predicting the flow of compressible and incompressible fluids through multistage control valves. Is based on standard hydrodynamic equations for Newtonian incompressible fluids. Is applicable only to those designs of multistage multipath control valves and multistage single path control valves.
Stellventile für die Prozessregelung - Teil 2-5: Durchflusskapazität - Bemessungsgleichungen für Fluide durch Mehrstufenregelventile mit Druckrückgewinn zwischen den Stufen
Vannes de régulation des processus industriels - Partie 2-5: Capacité d'écoulement - Equations de dimensionnement pour l'écoulement des fluides dans les vannes de régulation multi-étagées avec récupération entre étages
Fournit les équations permettant de prédire le débit de fluides compressibles et incompressibles dans les vannes de régulation multi-étagées. Est fondée sur les équations de base pour les fluides newtoniens incompressibles. S'applique uniquement aux conceptions de vannes de régulation multi-étagées à chemins multiples et multi-étagées à chemin unique.
Industrial-process control valves - Part 2-5: Flow capacity - Sizing equations for fluid flow through multistage control valves with interstage recovery
General Information
Standards Content (Sample)
SLOVENSKI SIST EN 60534-2-5:2004
STANDARD
marec 2004
Industrial-process control valves - Part 2-5: Flow capacity - Sizing equations for fluid
flow through multistage control valves with interstage recovery
ICS 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 60534-2-5
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2003
ICS 23.060.40 ; 25.040.40
English version
Industrial-process control valves
Part 2-5: Flow capacity –
Sizing equations for fluid flow
through multistage control valves
with interstage recovery
(IEC 60534-2-5:2003)
Vannes de régulation des processus Stellventile für die Prozessregelung
industriels Teil 2-5: Durchflusskapazität –
Partie 2-5: Capacité d'écoulement – Bemessungsgleichungen für Fluide
Equations de dimensionnement durch Mehrstufenregelventile
pour l'écoulement des fluides mit Druckrückgewinn
dans les vannes de régulation zwischen den Stufen
multi-étagées avec récupération (IEC 60534-2-5:2003)
entre étages
(CEI 60534-2-5:2003)
This European Standard was approved by CENELEC on 2003-10-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, 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
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60534-2-5:2003 E
Foreword
The text of document 65B/488/FDIS, future edition 1 of IEC 60534-2-5, 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 60534-2-5 on 2003-10-01.
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) 2004-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-10-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex ZA is normative and annexes A and B are informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60534-2-5:2003 was approved by CENELEC as a
European Standard without any modification.
__________
- 3 - EN 60534-2-5:2003
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60534-1 1987 Industrial-process control valves EN 60534-1 1993
Part 1: Control valve terminology and
general considerations
IEC 60534-2-1 1998 Part 2-1: Flow capacity - Sizing EN 60534-2-1 1998
equations for fluid flow under installed
conditions
IEC 60534-2-3 1997 Part 2-3: Flow capacity - Test EN 60534-2-3 1998
procedures
NORME
CEI
INTERNATIONALE IEC
60534-2-5
INTERNATIONAL
Première édition
STANDARD
First edition
2003-09
Vannes de régulation des processus industriels –
Partie 2-5:
Capacité d'écoulement –
Equations de dimensionnement pour l'écoulement
des fluides dans les vannes de régulation multi-
étagées avec récupération entre étages
Industrial process control valves –
Part 2-5:
Flow capacity –
Sizing equations for fluid flow through multistage
control valves with interstage recovery
© IEC 2003 Droits de reproduction réservés ⎯ Copyright - all rights reserved
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utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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International Electrotechnical Commission
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Pour prix, voir catalogue en vigueur
For price, see current catalogue
60534-2-5 © IEC:2003 – 3 –
CONTENTS
FOREWORD . 5
INTRODUCTION .9
1 Scope .11
2 Normative references.11
3 Terms and definitions .11
4 Installation .15
5 Symbols.17
6 Sizing equations for incompressible fluids.19
6.1 Turbulent flow.19
7 Sizing equations for compressible fluids .21
7.1 Turbulent flow.23
8 Determination of correction factors .25
8.1 Piping geometry factor, F .25
p
8.2 Liquid pressure recovery factors F or F .25
L LP
8.3 Liquid critical pressure ratio factor F .27
F
8.4 Expansion factor Y .27
8.5 Pressure differential ratio factor x or x .29
T TP
8.6 Specific heat ratio factor F .29
γ
8.7 Compressibility factor Z .29
8.8 Stage interaction factor k.31
8.9 Reheat factor r.31
a
Annex A (informative) Physical constants .35
Annex B (informative) Examples of sizing calculations .37
Bibliography.55
Figure 1 – Multistage multipath trim .13
Figure 2 – Multistage single path trim.15
Figure 3 – Reference pipe section for sizing.17
Figure 4 – Liquid critical pressure ratio factor F .33
F
Table 1 – Numerical constants N.31
Table 2 – Typical values of liquid pressure recovery factor F , and pressure differential
L
ratio factor x at full rated travel.33
T
Table 3 – Values of the stage interaction factors k and the reheat factors r .33
60534-2-5 © IEC:2003 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
––––––––––––
INDUSTRIAL-PROCESS CONTROL VALVES –
Part 2-5: Flow capacity – Sizing equations for fluid flow
through multistage control valves with interstage recovery
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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(ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60534-2-5 has been prepared by subcommittee 65B: Devices, of
IEC technical committee 65: Industrial-process measurement and control.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/488/FDIS 65B/502/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
60534-2-5 © IEC:2003 – 7 –
The committee has decided that the contents of this publication will remain unchanged until 2007.
At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
60534-2-5 © IEC:2003 – 9 –
INTRODUCTION
This part of IEC 60534 includes equations for predicting flow which are the same as IEC
60534-2-1. The differences in this multistage standard are:
a) the equation for the calculation of expansion factor Y (equation 18);
b) the non-inclusion of the section on sizing for laminar flow;
c) the inclusion of
...
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