IEC 60534-1:2023

Industrial-process control valves - Part 1: Control valve terminology and general considerations

IEC 60534-1:2023 applies to all types of industrial-process control valves (hereinafter referred to as control valves). This document establishes a partial basic terminology list and provides guidance on the use of all other parts of IEC 60534.

Vannes de régulation des processus industriels - Partie 1: Terminologie des vannes de régulation et considérations générales

L'IEC 60534-1:2023 s’applique à tous les types de vannes de régulation des processus industriels (désignés ci-après sous le terme vannes de régulation). Le présent document établit une liste terminologique de base partielle et fournit des recommandations d'utilisation de toutes les autres parties de l'IEC 60534.

General Information

• Status: Published
• Publication Date: 22-May-2023
• 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: 26-May-2023
• Completion Date: 23-May-2023

Relations

• Revises: IEC 60534-1:2005 - Industrial-process control valves - Part 1: Control valve terminology and general considerations
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60534-1 ®
Edition 4.0 2023-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Industrial-process control valves –
Part 1: Control valve terminology and general considerations

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
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Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
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IEC 60534-1 ®
Edition 4.0 2023-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Industrial-process control valves –
Part 1: Control valve terminology and general considerations
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 23.060.40; 25.040.40 ISBN 978-2-8322-7065-3

– 2 – IEC 60534-1:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 Component terminology . 6
3.3 Functional terminology . 9
4 Testing requirements . 14
4.1 Production testing . 14
4.2 Type testing . 14
4.2.1 Flow-capacity testing . 14
4.2.2 Laboratory noise testing . 14
4.2.3 Test specimen . 14
5 Prediction methods . 14
5.1 Valve sizing . 14
5.2 Noise levels . 14
Bibliography . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 1: Control valve terminology and general considerations

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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60534-1:2005. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
– 4 – IEC 60534-1:2023 RLV © IEC 2023
IEC 60534-1 has been prepared by subcommittee 65B: Measurement and control devices, of
IEC technical committee 65: Industrial-process measurement, control and automation. It is an
International Standard.
This fourth edition cancels and replaces the third edition published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) update of the definitions given in IEC 60534-1 in order to harmonize them with current
terminology;
b) addition of terms common to individual standards in the 60534 series; and
c) further clarification in existing definitions.
The text of this standard is based on the following documents:
Draft Report on voting
65B/1228/FDIS 65B/1235/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
IEC 60534 consists of the following parts, under the general title Industrial-process control
valves:
Part 1: Control valve terminology and general considerations
Part 2-1: Flow capacity – Sizing equations for fluid flow under installed conditions
Part 2-3: Flow capacity – Test procedures
Part 2-4: Flow capacity – Section Four: Inherent flow characteristics and rangeability
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
Part 3-2: Dimensions – Face-to-face dimensions for rotary control valves except butterfly
valves
Part 3-3: Dimensions – End-to-end dimensions for buttweld, two-way, globe-type, straight
pattern control valves
Part 4: Inspection and routine testing
Part 5: Marking
Part 6-1: Mounting details for attachment of positioners to control valves – Section 1:
Positioner mounting on linear actuators
Part 6-2: Mounting details for attachment of positioners to control valves – Positioner
mounting on rotary actuators
Part 7: Control valve data sheet
Part 8-1: Noise considerations – Section One: Laboratory measurement of noise generated
by aerodynamic flow through control valves

Part 8-2: Noise considerations – Section 2: Laboratory measurement of noise generated by
hydrodynamic flow through control valves
Part 8-3: Noise considerations – Control valve aerodynamic noise prediction method
Part 8-4: Noise considerations – Section 4: Prediction of noise generated by hydrodynamic
flow
Part 9: Test procedure for response measurements from step inputs
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

– 6 – IEC 60534-1:2023 RLV © IEC 2023
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 1: Control valve terminology and general considerations

1 Scope
This part of IEC 60534 applies to all types of industrial-process control valves (hereinafter
referred to as control valves). This document establishes a partial basic terminology list and
provides guidance on the use of all other parts of IEC 60534.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 60534 (all parts), Industrial-process control valves
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Component terminology
3.1.1
control valve
power-operated device that changes the fluid flow rate in a process control system
Note 1 to entry: It The device assembly consists of a valve connected to an actuator that is capable of changing
the position of a closure member in the valve in response to a signal from the controlling system.
3.1.1.1
control valve with a linear motion closure member
valve that contains a closure member that moves in a line perpendicular to the seating plane
3.1.1.1.1
diaphragm valve
valve in which a flexible closure member isolates the line fluid from the actuating mechanism
and provides a seal to the atmosphere
3.1.1.1.2
gate valve
valve whose closure member is a flat gate that moves in a direction parallel to the plane of the
seat
3.1.1.1.3
globe (angle) valve
valve in which the closure member moves in a direction pe
...

IEC 60534-1 ®
Edition 4.0 2023-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 1: Control valve terminology and general considerations
Vannes de régulation des processus industriels –
Partie 1: Terminologie des vannes de régulation et considérations générales
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
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Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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further assistance, please contact the Customer Service
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IEC 60534-1 ®
Edition 4.0 2023-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 1: Control valve terminology and general considerations
Vannes de régulation des processus industriels –
Partie 1: Terminologie des vannes de régulation et considérations générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 23.060.40; 25.040.40 ISBN 978-2-8322-6855-1
– 2 – IEC 60534-1:2023 © IEC 2023
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 Component terminology . 6
3.3 Functional terminology . 9
4 Testing requirements . 13
4.1 Production testing . 13
4.2 Type testing . 13
4.2.1 Flow-capacity testing . 13
4.2.2 Laboratory noise testing . 13
4.2.3 Test specimen . 13
5 Prediction methods . 13
5.1 Valve sizing . 13
5.2 Noise levels . 14
Bibliography . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 1: Control valve terminology and general considerations

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.
IEC 60534-1 has been prepared by subcommittee 65B: Measurement and control devices, of
IEC technical committee 65: Industrial-process measurement, control and automation. It is an
International Standard.
This fourth edition cancels and replaces the third edition published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) update of the definitions given in IEC 60534-1 in order to harmonize them with current
terminology;
b) addition of terms common to individual standards in the 60534 series; and
c) further clarification in existing definitions.

– 4 – IEC 60534-1:2023 © IEC 2023
The text of this standard is based on the following documents:
Draft Report on voting
65B/1228/FDIS 65B/1235/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
IEC 60534 consists of the following parts, under the general title Industrial-process control
valves:
Part 1: Control valve terminology and general considerations
Part 2-1: Flow capacity – Sizing equations for fluid flow under installed conditions
Part 2-3: Flow capacity – Test procedures
Part 2-4: Flow capacity – Section Four: Inherent flow characteristics and rangeability
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
Part 3-2: Dimensions – Face-to-face dimensions for rotary control valves except butterfly
valves
Part 3-3: Dimensions – End-to-end dimensions for buttweld, two-way, globe-type, straight
pattern control valves
Part 4: Inspection and routine testing
Part 5: Marking
Part 6-1: Mounting details for attachment of positioners to control valves – Section 1:
Positioner mounting on linear actuators
Part 6-2: Mounting details for attachment of positioners to control valves – Positioner
mounting on rotary actuators
Part 7: Control valve data sheet
Part 8-1: Noise considerations – Section One: Laboratory measurement of noise generated
by aerodynamic flow through control valves
Part 8-2: Noise considerations – Section 2: Laboratory measurement of noise generated by
hydrodynamic flow through control valves
Part 8-3: Noise considerations – Control valve aerodynamic noise prediction method
Part 8-4: Noise considerations – Section 4: Prediction of noise generated by hydrodynamic
flow
Part 9: Test procedure for response measurements from step inputs

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------
...