oSIST prEN ISO 5211:2025
(Main)Industrial valves - Part-turn actuator attachments (ISO/DIS 5211:2025)
Industrial valves - Part-turn actuator attachments (ISO/DIS 5211:2025)
This document specifies requirements for the attachment of part-turn actuators, with or without gearboxes, to industrial valves.
The attachment of part-turn actuators to control valves in accordance with the requirements of this document is subject to an agreement between the supplier and the purchaser.
This document specifies:
— flange dimensions necessary for the attachment of part-turn actuators to industrial valves [see Figures 1 a) and 1 c)] or to intermediate supports [see Figures 1 b) and 1 d)];
— driving component dimensions of part-turn actuators necessary to attach them to the driven components;
— reference values for torques for interfaces and for couplings having the dimensions specified in this document.
The attachment of the intermediate support to the valve is out of the scope of this document.
Industriearmaturen - Anschlüsse von Schwenkantrieben (ISO/DIS 5211:2025)
Robinetterie industrielle - Raccordement des actionneurs à fraction de tour (ISO/DIS 5211:2025)
Le présent document spécifie les spécifications pour le raccordement des actionneurs à fraction de tour, avec ou sans réducteur, aux appareils de robinetterie industrielle.
Le raccordement des actionneurs à fraction de tour aux robinets de régulation conformément aux spécifications du présent document est soumis à accord entre le fournisseur et l'acheteur.
Le présent document spécifie:
— les dimensions des brides nécessaires pour le raccordement des actionneurs à fraction de tour aux appareils de robinetterie industrielle [voir Figures 1 a) et 1 c)] ou aux supports intermédiaires [voir Figures 1 b) et 1 d)];
— les dimensions des éléments d'entraînement des actionneurs à fraction de tour nécessaires pour les raccorder aux éléments entraînés;
— les valeurs de référence des couples pour les interfaces et les éléments d'accouplement dont les dimensions sont spécifiées dans le présent document.
Le raccordement du support intermédiaire à l'appareil de robinetterie ne relève pas du domaine d'application du présent document.
Industrijski ventili - Pritrditve zasučnih pogonov na ventilih (ISO/DIS 5211:2025)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Industrijski ventili - Pritrditve zasučnih pogonov na ventilih (ISO/DIS 5211:2025)
Industrial valves - Part-turn actuator attachments (ISO/DIS 5211:2025)
Industriearmaturen - Anschlüsse von Schwenkantrieben (ISO/DIS 5211:2025)
Robinetterie industrielle - Raccordement des actionneurs à fraction de tour (ISO/DIS
5211:2025)
Ta slovenski standard je istoveten z: prEN ISO 5211
ICS:
23.060.01 Ventili na splošno Valves in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 5211
ISO/TC 153
Industrial valves — Part-turn
Secretariat: AFNOR
actuator attachments
Voting begins on:
Robinetterie industrielle — Raccordement des actionneurs à
2025-02-21
fraction de tour
Voting terminates on:
ICS: 23.060.01 2025-05-16
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 5211:2025(en)
DRAFT
ISO/DIS 5211:2025(en)
International
Standard
ISO/DIS 5211
ISO/TC 153
Industrial valves — Part-turn
Secretariat: AFNOR
actuator attachments
Voting begins on:
Robinetterie industrielle — Raccordement des actionneurs à
fraction de tour
Voting terminates on:
ICS: 23.060.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
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POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
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NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 5211:2025(en)
ii
ISO/DIS 5211:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Maximum flange torques . 2
5 Flange dimensions . 2
6 Designation . 5
7 Dimensions and torques . 6
7.1 General .6
7.2 Drive by key(s) .6
7.3 Drive by parallel or diagonal square head .8
7.4 Drive by flat head .9
7.5 Drive by improved flat head .11
7.6 Drive by involute spline . 12
7.7 Drive by bi-square . 13
8 Position of driven components at interface below part-turn actuator . 14
8.1 Drive by key(s) .14
8.2 Drive by parallel or diagonal square head or bi-square .16
8.3 Drive by flat head .17
9 Dowel pins . 17
Annex A (informative) Explanation of calculations . 19
Annex B (normative) Dimensions of keys and keyways .21
Bibliography .27
iii
ISO/DIS 5211:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 153, Valves, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 69, Industrial valves, in accordance with
the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 5211:2023), which has been technically
revised.
The main changes are as follows:
— dimensions and tolerances for keys and keyways were added in a new Annex B;
— a reference to the new Annex B was added in 7.2;
— editorial changes were made.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO/DIS 5211:2025(en)
Introduction
The purpose of this document is to establish certain basic requirements for the attachment of part-turn
actuators, in order to define the interface between actuator and valve.
This document is, in general, considered in conjunction with the specific requirements which may be agreed
between the parties concerned.
NOTE 1 In this document, the term “valve” can also be understood to include “valve with an intermediate support”
[see Figure 1 b)].
NOTE 2 When a combination of a multi-turn actuator and separate part-turn gearbox is coupled to form a part-turn
1)
actuator, the multi-turn attachment to the gearbox is in accordance with ISO/DIS 5210:2025 , Figures 1 c) and 1 d). A
combination of a multi-turn actuator with integral part-turn gearbox supplied as a part-turn actuator is in accordance
with Figures 1a) and 1b).
a) Direct interface b) Intermediate sup- c) Direct interface d) Intermediate support
port interface (when combination of interface (when combina-
a multi-turn actuator tion of a multi-turn actua-
and a gearbox) tor and a gearbox)
Key
1 part-turn actuator 5 gearbox
2 interface (see this document) 6 interface (see ISO 5210)
3 valve 7 multi-turn actuator
4 intermediate support
Figure 1 — Interface between part-turn actuator and valve
1) Under preparation.
v
DRAFT International Standard ISO/DIS 5211:2025(en)
Industrial valves — Part-turn actuator attachments
1 Scope
This document specifies requirements for the attachment of part-turn actuators, with or without gearboxes,
to industrial valves.
The attachment of part-turn actuators to control valves in accordance with the requirements of this
document is subject to an agreement between the supplier and the purchaser.
This document specifies:
— flange dimensions necessary for the attachment of part-turn actuators to industrial valves [see
Figures 1 a) and 1 c)] or to intermediate supports [see Figures 1 b) and 1 d)];
— driving component dimensions of part-turn actuators necessary to attach them to the driven components;
— reference values for torques for interfaces and for couplings having the dimensions specified in this
document.
The attachment of the intermediate support to the valve is out of the scope of this document.
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.
ISO 273, Fasteners — Clearance holes for bolts and screws
3 T
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