SIST EN 60534-7:2011

Industrial-process control valves - Part 7: Control valve data sheet (IEC 60534-7:2010)

This part of the IEC 60534 series provides a list of requirements that are normally necessary for the procurement of the majority of control valves for process systems. No attempt is made to include all possible requirements for any conceivable process. The list is arranged in a format designed to assist the specification writer with a standardized presentation of data and also to be a basis for use with data processing facilities. A detailed set of instructions is included in order to ensure that the abbreviated terms are fully understood and that consistent data entries are always made.

Stellventile für die Prozessregelung - Teil 7: Datenblatt für Stellventile (IEC 60534-7:2010)

Vannes de régulation des processus industriels - Partie 7: Grille de définition de vanne de régulation (CEI 60534-7:2010)

La CEI 60534-7:2010 fournit une liste d'exigences généralement nécessaires à la définition de la majorité des vannes de régulation de processus. Il n'a pas été envisagé d'établir une liste exhaustive de toutes les exigences possibles pour tout processus concevable. La liste est disposée de manière à aider le rédacteur de la spécification par une présentation normalisée des données et aussi pour établir une base utilisable avec les outils de traitement de données. Un jeu détaillé d'instructions est inclus de manière à assurer la bonne compréhension des termes abrégés et de manière systématique, la cohérence des données enregistrées. Cette deuxième édition annule et remplace la première édition parue en 1989. La présente édition constitue une révision technique. Les modifications principales par rapport à l'édition précédente, sont les suivantes:  - la norme a été mise à jour pour prendre en compte l'utilisation des accessoires électroniques numériques et des protocoles des bus de terrain;  - des explications des termes et définitions contenant le même sous-titre que celui de l'information requise dans la Grille de définition de vanne de régulation ont été données pour clarification;  - le système de numérotation des colonnes a été remplacé par des entêtes de titres descriptifs.

Regulacijski ventili za industrijske procese - 7. del: Tehnični podatki za regulacijski ventil (IEC 60534-7:2010)

Ta del serije IEC 60534 zagotavlja seznam zahtev, ki so običajno potrebne za naročilo večine regulacijskih ventilov za procesne sisteme. Ne poskuša vključiti vse možne zahteve za kateri koli možni proces. Seznam je razvrščen v obliki, načrtovani kot pomoč piscu specifikacij s standardizirano predstavitvijo podatkov ter kot osnova za uporabo z napravami obdelave podatkov. Vključen je podroben sklop navodil z namenom zagotoviti, da so skrajšani izrazi popolnoma razumljeni ter da se podatki vedno vnašajo dosledno.

General Information

• Status: Published
• Publication Date: 16-Dec-2010
• ICS: 23.060.40 - Pressure regulators
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 15-Dec-2010
• Due Date: 19-Feb-2011
• Completion Date: 17-Dec-2010
• Ref Project: EN 60534-7:2010 - Industrial-process control valves - Part 7: Control valve data sheet

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60534-7:2011
01-januar-2011
5HJXODFLMVNLYHQWLOL]DLQGXVWULMVNHSURFHVHGHO7HKQLþQLSRGDWNL]D
UHJXODFLMVNLYHQWLO,(&
Industrial-process control valves - Part 7: Control valve data sheet (IEC 60534-7:2010)
Stellventile für die Prozessregelung - Teil 7: Datenblatt für Stellventile (IEC 60534-
7:2010)
Vannes de régulation des processus industriels - Partie 7: Grille de définition de vanne
de régulation (CEI 60534-7:2010)
Ta slovenski standard je istoveten z: EN 60534-7:2010
ICS:
23.060.40 7ODþQLUHJXODWRUML Pressure regulators
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
SIST EN 60534-7:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 60534-7:2011

---------------------- Page: 2 ----------------------

SIST EN 60534-7:2011

EUROPEAN STANDARD
EN 60534-7

NORME EUROPÉENNE
December 2010
EUROPÄISCHE NORM

ICS 23.060.40; 25.040.40


English version


Industrial-process control valves -
Part 7: Control valve data sheet
(IEC 60534-7:2010)


Vannes de régulation des processus Stellventile für die Prozessregelung -
industriels - Teil 7: Datenblatt für Stellventile
Partie 7: Grille de définition de vanne de (IEC 60534-7:2010)
régulation
(CEI 60534-7:2010)




This European Standard was approved by CENELEC on 2010-12-01. 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, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60534-7:2010 E

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SIST EN 60534-7:2011
EN 60534-7:2010 - 2 -
Foreword
The text of document 65B/756/FDIS, future edition 2 of IEC 60534-7, prepared by SC 65B, Devices &
process analysis, of IEC TC 65, Industrial-process measurement, control and automation, was submitted
to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60534-7 on 2010-12-01.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2011-09-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2013-12-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60534-7:2010 was approved by CENELEC as a European
Standard without any modification.
__________

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SIST EN 60534-7:2011
- 3 - EN 60534-7:2010
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  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 60529 2001 Degrees of protection provided by enclosures - -
(IP Code)


IEC 60534 Series Industrial-process control valves EN 60534 Series


IEC 60534-1 2005 Industrial-process control valves - EN 60534-1 2005
Part 1: Control valve terminology and general
considerations


IEC 60534-2-1 1998 Industrial-process control valves - EN 60534-2-1 1998
Part 2-1: Flow capacity - Sizing equations for
fluid flow under installed conditions


IEC 60534-2-4 2009 Industrial-process control valves - EN 60534-2-4 2009
Part 2-4: Flow capacity - Inherent flow
characteristics and rangeability


IEC 60534-2-5 2003 Industrial-process control valves - EN 60534-2-5 2003
Part 2-5: Flow capacity - Sizing equations for
fluid flow through multistage control valves
with interstage recovery


IEC 60534-3-1 2000 Industrial-process control valves - EN 60534-3-1 2000
Part 3-1: Dimensions - Face-to-face + corr. July 2000
dimensions for flanged, two-way, globe-type,
straight pattern and centre-to-face dimensions
for flanged, two-way, globe-type, angle pattern
control valves


IEC 60534-3-2 2001 Industrial-process control valves - EN 60534-3-2 2001
Part 3-2: Dimensions - Face-to-face
dimensions for rotary control valves except
butterfly valves


IEC 60534-3-3 1998 Industrial-process control valves - EN 60534-3-3 1998
Part 3-3: Dimensions - End-to-end dimensions
for buttweld, two-way, globe-type, straight
pattern control valves


IEC 60534-4 2006 Industrial process control valves - EN 60534-4 2006
Part 4: Inspection and routine testing


IEC 60534-5 2004 Industrial-process control valves - EN 60534-5 2004
Part 5: Marking

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SIST EN 60534-7:2011
EN 60534-7:2010 - 4 -
Publication Year Title EN/HD Year

IEC 60534-8-1 2005 Industrial-process control valves - EN 60534-8-1 2005
Part 8-1: Noise considerations - Laboratory
measurement of noise generated by
aerodynamic flow through control valves


IEC 60534-8-3 2000 Industrial-process control valves - EN 60534-8-3 2000
Part 8-3: Noise considerations - Control valve
aerodynamic noise prediction method


IEC 60534-8-4 2005 Industrial-process control valves - EN 60534-8-4 2005
Part 8-4: Noise considerations - Prediction of
noise generated by hydrodynamic flow

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SIST EN 60534-7:2011
IEC 60534-7
®
Edition 2.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Industrial-process control valves –
Part 7: Control valve data sheet

Vannes de régulation des processus industriels –
Partie 7: Grille de définition de vanne de régulation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
Q
CODE PRIX
ICS 23.060.40; 25.040.40 ISBN 978-2-88912-207-3
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60534-7:2011
– 2 – 60534-7 Ó IEC:2010
CONTENTS
FOREW ORD . 3
INTRODUCTION . 5
1 Sc o pe . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Application . 7
4.1 Ge n eral . 7
4.2 Preliminary valve specification. 7
4.3 Inquiry valve specification . 7
4.4 Order valve specification. 7
5 General requirements sheet . 7
5.1 Purpose of the general requirements sheet . 7
5.2 Alternate location for data sheet items. 8
5.3 Items to be considered for inclusion in general requirements . 8
6 Preparation of data sheet (see Figure 1) . 8
6.1 Identification blocks . 8
6.2 Explanation of numbered columns . 8
6.3 Instructions for numbered lines . 9
Bibliography . 17

Figure 1 – Control valve data sheet . 14
Figure 2 – General requirements sheet . 15
Figure 3 – Supplementary general requirements sheets. 16

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SIST EN 60534-7:2011
60534-7 Ó IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INDUSTRIAL-PROCESS CONTROL VALVES –

Part 7: Control valve data sheet


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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (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
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 60534-7 has been prepared by subcommittee 65B: Devices and
process analysis, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This second edition cancels and replaces the first edition published in 1989. This edition
constitutes a technical revision.
The main changes with respect to the previous edition are listed below:
· the standard has been updated to reflect digital electronic accessories and fieldbus
protocols;
· to aid clarification, the explanation of terms and definitions contains the same
subheading as the information required in the control valve data sheet;
· the column numbering system has been replaced with descriptive title headings.

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SIST EN 60534-7:2011
– 4 – 60534-7 Ó IEC:2010
The text of this standard is based on the following documents:
FDIS Report on voting
65B/756/FDIS 65B/771/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.
A list of all parts of the IEC 60534 series, published under the general title Industrial-process
control valves, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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SIST EN 60534-7:2011
60534-7 Ó IEC:2010 – 5 –
INTRODUCTION
The writing of control valve specifications is an extremely important segment of the complete
design, purchase and manufacturing of any process control system.
If the wrong control valve is specified, due to either incomplete or erroneous specification, the
replacement of that valve becomes costly to both the user and the control valve manufacturer
and often results in undue project delay. Therefore, many of the important control valve users
and contractors have developed their own standard data sheets to eliminate as much
misunderstanding as possible regarding the valve specifications.
To avoid confusion between valve manufacturers, users and contractors, standardisation of
the datasheet is required.
The purpose of a standard control valve data sheet is to promote uniformity, both in content
and form. General use of this form by contractors, users and manufacturers offers many
advantages. For example:
· assisting in preparation of a complete specification by listing and providing space for
all principal descriptive options;
· promoting uniform terminology;
· facilitates quoting, purchasing, receiving, accounting and ordering procedures by
uniform display of information;
· providing a useful permanent record and information for checking;
· improving efficiency from initial concept to the final installation.

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SIST EN 60534-7:2011
– 6 – 60534-7 Ó IEC:2010
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 7: Control valve data sheet



1 Scope
This part of the IEC 60534 series provides a list of requirements that are normally necessary
for the procurement of the majority of control valves for process systems. No attempt is made
to include all possible requirements for any conceivable process.
The list is arranged in a format designed to assist the specification writer with a standardized
presentation of data and also to be a basis for use with data processing facilities.
A detailed set of instructions is included in order to ensure that the abbreviated terms are fully
understood and that consistent data entries are always made.
2 Normative references
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.
IEC 60529:2001 Degrees of protection provided by enclosures (IP Code)
IEC 60534 (all parts), Industrial-process control valves
IEC 60534-1:2005, Industrial-process control valves – Part 1: Control valve terminology and
general considerations
IEC 60534-2-1:1998, Industrial-process control valves – Part 2-1: Flow-capacity – Sizing
equations for fluid flow under installed conditions
IEC 60534-2-4:2009, Industrial-process control valves – Part 2-4: Flow capacity – Inherent
flow characteristics and rangeability
IEC 60534-2-5:2003, Industrial-process control valves – Part 2-5: Flow-capacity – Sizing
equations for fluid flow through multistage control valves with interstage recovery
IEC 60534-3-1:2000, Industrial-process control valves – Part 3-1: Dimensions – Face-to-face
dimensions for flanged, two-way, globe-type, straight pattern and centre-to-face dimensions
for flanged, two-way, globe-type, angle pattern control valves
IEC 60534-3-2:2001, Industrial-process control valves – Part 3-2: Dimensions – Face-to-face
dimensions for rotary control valves except butterfly valves
IEC 60534-3-3:1998, Industrial-process control valves – Part 3-3: Dimensions – Dimensions
End-to-end dimensions for buttweld, two-way, globe-type, straight pattern control valves
IEC 60534-4:2006, Industrial-process control valves – Part 4: Inspection and routine testing
IEC 60534-5:2004, Industrial-process control valves – Part 5: Marking

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SIST EN 60534-7:2011
60534-7 Ó IEC:2010 – 7 –
IEC 60534-8-1:2005, Industrial-process control valves – Part 8-1: Noise considerations –
Laboratory measurement of noise generated by aerodynamic flow through control valves
IEC 60534-8-3:2000, Industrial-process control valves – Part 8-3: Noise considerations –
Control valve aerodynamic noise prediction method
IEC 60534-8-4:2005, Industrial-process control valves – Part 8-4: Noise considerations –
Prediction of noise generated by hydrodynamic flow
3 Terms and definitions
For the purposes of this document, the terms and definitions given in the IEC 60534 series
apply.
4 Application
4.1 General
The control valve data sheet (Figure 1) below may be used for three different levels of control
valve selection.
4.2 Preliminary valve specification
For a preliminary inquiry and/or quotation, buyer and vendor may agree on a minimum level of
information. In this case, the buyer and manufacturer mark a few lines only in column 1 by a
dot, triangle or other symbol. This method minimizes efforts for both buyer and vendor.
4.3 Inquiry valve specification
In inquiry stage, some of the process data and also some of the general requirements will not
be fully known and specified. This may not allow the application of the IEC calculation
methods given in IEC 60534-2-1 and IEC 60534-2-5. Preliminary valve sizing methods may be
used at this stage. Since the main focus of the inquiry specification is to provide all data
required to work out a comparable technical and commercial quote, in most cases there is a
need to mark additional lines beyond those in 6.1. Also on the inquiry specification, the lines
in column 1 shall be marked by a dot, triangle or other symbol by the buyer and manufacturer.
4.4 Order valve specification
A complete ordering specification should ideally include all relevant information about the
valve, actuator and accessories concerned. In this case, the fully completed control valve
data sheet becomes a kind of passport, which allows an exact identification and can be used
for many purposes.
5 General requirements sheet
5.1 Purpose of the general requirements sheet
The purpose of the general requirements sheet (Figure 2), which is optional, is to provide a
means for the user to specify general or special requirements that are applicable to a valve or
group of valves. Examples are national and international standards, user company standards
and special project requirements. These general or special requirements shall be listed in the
table of contents section of page 1 of the general requirements sheet. Supplementary general
requirements sheets (Figure 3) may be used as necessary. It may also be necessary to cross-
reference the general requirements sheet(s) with the data sheets. If there is a conflict
between the general requirements sheet and the data sheet, then the latter shall overrule.

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SIST EN 60534-7:2011
– 8 – 60534-7 Ó IEC:2010
NOTE For those countries that use 8,5 ´ 11 inch paper and where linefeed is limited to 1/6 inch, the general
requirements sheets can be shortened by deleting the appropriate length from the middle portion of the forms. The
data sheet can be shortened by deleting the “Remarks” section.
The use of computers permits an adjustable linefeed which allows the forms to be printed without the deletion of
any lines.
5.2 Alternate location for data sheet items
Any item on the data sheet (Figure 1) which cannot be adequately described in the available
space shall be covered on the general requirements sheet.
5.3 Items to be considered for inclusion in general requirements
Items not included on the data sheet may also be covered on the general requirements sheet.
The following is a partial list of areas that may need to be considered and to be stated on the
general requirements sheet:
a) terminology (see IEC 60534-1);
b) codes, standards and regulations;
c) valve sizing (see IEC 60534-2-1 and 60534-2-5);
d) noise (see IEC 60534-8-3, respectively IEC 60534-8-4);
e) inspection and routine testing (see IEC 60534-4);
f) non-destructive examination;
g) marking (see IEC 60534-5);
h) documentation;
i) material requirements;
j) face-to-face dimensions (see IEC 60534-3-1, IEC 60534-3-2 and IEC 60534-3-3)
k) final inspection requirements (see IEC 60534-4)
l) environmental considerations;
m) packaging;
n) accessories;
o) quality assurance requirements.
6 Preparation of data sheet (see Figure 1)
6.1 Identification blocks
The identification blocks at the top and bottom of this form are designed to permit the user or
contractor to add company name (upper left-hand corner), plant location, project number, tag
number, piping and instrumentation (P and I) drawing number, and other specific project data.
6.2 Explanation of numbered columns
The meaning of the numbered columns (1-5) under the heading is as follows:
(1) marking of lines for a preliminary valve specification or inquiry valve specification as
agreed between buyer and vendor (see 4.1 and 4.2);
(2) numbering of individual lines for identification purposes;
(3) marking of revisions (e.g. capital letters);
(4) main categories for which information is required;
(5) terms and definitions as explained below.

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SIST EN 60534-7:2011
60534-7 Ó IEC:2010 – 9 –
6.3 Instructions for numbered lines
Line Explanation of terms and definitions
No.
1 Location of control valve concerned, for example, line No. 123 upstream of soaker.
2 Service/application, for example, feedwater to boiler.
3 a) Nature and degree of explosion hazard existing in this particular location.
Specify group, temperature and zone (e.g., Group IIC, T4, Zone 1) and refer to
appropriate standard.
b) Internal protection class according to IEC 60529.
4 Minimum and maximum ambient temperatures prevailing for the environment of the
installation which may arise due to service or weather conditions. State units.
5 Maximum sound pressure level (LpA) which the selected valve may be allowed to
produce under the specified service conditions.
6 Nominal pipe size (NPS/DN), schedule and/or wall thickness of upstream piping.
7 Nominal pipe size (NPS/DN), schedule and/or wall thickness of downstream piping.
8 a) Pipe Class (if any)
b) Pipe material and appropriate material standard.
9 The purpose of pipe insulation can be for thermal or acoustic reasons. The type
and thickness of insulation determines the acoustic attenuation.
10 Design pressure and maximum and minimum design temperature of the pipe (and
with this the design pressure and design temperature of the control valve also).
11 Pipe connection style, for example, flanges or butt weld ends for the upstream and
downstream connection of the control valve.
12 Description of process fluid concerned, for example, demineralized water or
superheated steam.
13 Physical state of the process fluid at upstream pressure and temperature.
14 Provide further information on the nature of the process fluid, such as
· non-Newtonian;
· entrained solids: Concentration, size, nature;
· polymerizing;
· erosive, abrasive;
· sticking;
· crystallizing, solidifying.
15-16 Minimum, normal and maximum flow rate as required by the process. It is
important to note that there is, dependent on the given application, a relationship
between the variables, i.e., the flow rate influences inlet and outlet pressures and
3
vice versa. Flow units: m /h, kg/h, t/h, etc.
NOTE Compressible fluid volumetric flow rates in cubic metres per hour, refer to either standard conditions,
which is an absolute pressure of 1 013,25 mbar and 288,6 °K, or normal conditions, which is an absolute
pressure of 1 013,25 mbar and 273 °K.
17-18 Absolute upstream and downstream pressures corresponding with minimum,
normal and maximum flow rates above. State units (bar, kPa, MPa, etc.).
19 Temperature at upstream condition (°C or K) with minimum, normal and maximum
flow rates above.
20 Density of process fluid at inlet pressure and inlet temperature with minimum,
normal and maximum flow rates above. For liquids and vapours, specify density in
3 3
kg /m. For gases, use either kg/m or molecular mass (M) as appropriate.
21 Vapour pressure at upstream temperature with minimum, normal and maximum

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SIST EN 60534-7:2011
– 10 – 60534-7 Ó IEC:2010
Line Explanation of terms and definitions
No.
flow rates above. Specify as absolute pressure.
22 Thermodynamic critical pressure of process fluid. Specify as absolute pressure.
23 Kinematic or absolute (dynamic) viscosity of process fluid with minimum, normal
and maximum flow rates above. Specify units.
24 Ratio of specific heats for gases: g = c /c .
p v
25 Compressibility Factor Z at upstream pressure and temperature with minimum,
1
normal and maximum flow rates above: see individual charts or Nelson-Obert
compressibility chart.
26 Gas/vapour fraction of the fluid at the valve inlet in mass% with minimum, normal
and maximum flow rates above (applicable on 2-phase flow only).
27 For actuator sizing purposes, specify the valve inlet and outlet pressures, when the
valve is in the closed position, which will result in the maximum differential
pressure. State absolute pressures.
28 Minimum and maximum air (or other) supply pressures. State gauge pressures.
29 Position of control valve in case of loss of actuator motive power: valve open,
closed, or hold in last position.
30 Position of control valve in case of input signal loss: valve open, closed, or hold in
last position.
31 Calculated flow coefficient, K or C , with minimum, normal and maximum flow
v v
rates above.
NOTE If the flow coefficient calculations include the use of a piping geometry factor F , the value of
p
F can be identified on the data sheet. This may be accomplished by placing an asterisk after the flow
p
coefficient value and placing the corresponding F value in the Remarks section.
p
32 Valve X / Valve F (as appropriate) with the valve strokes corresponding to the
T L
calculated flow coefficients given in line 31. The va
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