kSIST FprEN ISO 5210:2025

SLOVENSKI STANDARD
oSIST prEN ISO 5210:2025
01-april-2025
Industrijski ventili - Priključki vrtilnih pogonov na ventilih (ISO/DIS 5210:2025)
Industrial valves - Multi-turn actuator attachments (ISO/DIS 5210:2025)
Industriearmaturen - Anschlüsse von Drehantrieben für Armaturen (ISO/DIS 5210:2025)
Robinetterie industrielle - Raccordement des actionneurs multitours (ISO/DIS 5210:2025)
Ta slovenski standard je istoveten z: prEN ISO 5210
ICS:
23.060.01 Ventili na splošno Valves in general
oSIST prEN ISO 5210:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 5210:2025
oSIST prEN ISO 5210:2025
DRAFT
International
Standard
ISO/DIS 5210
ISO/TC 153
Industrial valves — Multi-turn
Secretariat: AFNOR
actuator attachments
Voting begins on:
Robinetterie industrielle — Raccordement des actionneurs
2025-02-24
multitours
Voting terminates on:
ICS: 23.060.01 2025-05-19
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 5210:2025(en)
oSIST prEN ISO 5210:2025
DRAFT
ISO/DIS 5210:2025(en)
International
Standard
ISO/DIS 5210
ISO/TC 153
Industrial valves — Multi-turn
Secretariat: AFNOR
actuator attachments
Voting begins on:
Robinetterie industrielle — Raccordement des actionneurs
multitours
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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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION.
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 5210:2025(en)
ii
oSIST prEN ISO 5210:2025
ISO/DIS 5210:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Maximum torques and thrusts . 2
5 Flange dimensions . 2
6 Designation . 4
7 Dimensions of driving and driven components . 5
7.1 General .5
7.2 Dimensions for assemblies capable of transmitting both torque and thrust: Group A .5
7.3 Dimensions for assemblies capable of transmitting torque only: Group B .7
7.4 Dimensions for assemblies capable of transmitting torque only: Group C.8
7.5 Dimensions for assemblies capable of transmitting torque only: Group D .9
7.6 Dimensions for assemblies capable of transmitting thrust only: Group Linear actuators .10
Annex A (informative) Explanation of calculations .12
Annex B (normative) Dimensions of keys and keyways . 14
Bibliography .20

iii
oSIST prEN ISO 5210:2025
ISO/DIS 5210:2025(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 5210:2023), which has been technically
revised.
The main changes are as follows:
— Figures 1, 2 and 6 were corrected;
— dimensions d , h and h were introduced;
5 4 5
— 7.3, Annex B and Bibliography were updated;
— 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
oSIST prEN ISO 5210:2025
ISO/DIS 5210:2025(en)
Introduction
The purpose of this document is to establish certain basic requirements for the attachment of multi-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 multi-turn/linear gearbox is coupled to form an
actuator, the multi-turn attachment to the gearbox is in accordance with this document [see Figures 1 c) and 1 d)]. A
combination of a multi-turn actuator with integral multi-turn/linear gearbox supplied as an actuator is in accordance
with Figures 1 a) and 1 b).
a) Direct interface b) Intermediate support c) Direct interface d) Intermediate support
interface (when combination of interface (when combi-
a multi-turn actuator nation of a multi-turn ac-
and multi-turn/linear tuator and a multi-turn/
gearbox) linear gearbox)
Key
1 multi-turn/linear actuator 5 gearbox
2 interface (see ISO 5210) 6 interface (see ISO 5210)
3 valve 7 multi-turn actuator
4 intermediate support
Figure 1 — Interface between multi-turn/linear actuator and valve

v
oSIST prEN ISO 5210:2025
oSIST prEN ISO 5210:2025
DRAFT International Standard ISO/DIS 5210:2025(en)
Industrial valves — Multi-turn actuator attachments
1 Scope
This document specifies the requirements for the attachment of multi-turn actuators to valves.
Throughout this document, “actuator” can be understood as “actuator and/or gearbox” providing a multi-
turn and/or linear output.
It specifies:
— flange dimensions necessary for the attachment of actuators to industrial valves [see Figure 1 a)] or to
intermediate supports [see Figure 1 b)];
— those driving component dimensions of actuators which are necessary to attach them to the driven
components;
— reference values for torque and thrust for flanges having the dimensions specified in 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 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
actuator
any device designed for attachment to a general-purpose industrial valve in order to provide for the
operation of the valve
Note 1 to entry: The device is designed to operate using motive energy which may be electrical, pneumatic, hydraulic,
manual, etc., or a combination of these. Movement is limited by travel, torque (3.4) and/or thrust (3.5).
3.2
multi-turn actuator
actuator (3.1) which transmits torque (3.4) to the valve for at least one revolution and may be capable of
withstanding thrust (3.5)
Note 1 to entry: An actuator may be a combination of a multi-turn actuator and multi-turn gearbox.

oSIST prEN ISO 5210:2025
ISO/DIS 5210:2025(en)
3.3
linear actuator
actuator (3.1) which transmits thrust (3.5) to the valve for a defined linear stroke
Note 1 to entry: An actuator may be a combination of a multi-turn actuator (3.2) and linear gearbox.
3.4
torque
turning moment transmitted through the mounting flanges and couplings
Note 1 to entry: Torque is expressed in newton-metres.
3.5
thrust
axial force transmitted through the mounting flanges and couplings
Note 1 to entry: Thrust is expressed in kilonewtons.
4 Maximum torques and thrusts
The torque and thrust shall comply with the values listed in Table 1 which represent the maximum torques
and thrusts which can be transmitted simultaneously through the mounting flanges and couplings. They are
based upon specified criteria.
Table 1 — Maximum torque and thrust values
Torque Thrust
Flange type
[Nm] [kN]
F05 20 10
F07 40 20
F10 100 40
F12 250 70
F14 400 100
F16 700 150
F25 1 200 200
F30 2 500 325
F35 5 000 700
F40 10 000 1 100
F48 20 000 2 000
F60 40 000 4 000
The values specified in Table 1 have been defined on the basis of bolts in tension at a stress of 290 MPa and
a coefficient of friction of 0,2 between the mounting interface. All variations in these defined parameters
lead to variations of the transmittable torque and/or thrust values. See Annex A for an explanation on the
calculation method.
The selection of flange size for a particular application should take account of additional torques and/or
thrust that may be generated at the valve stem because of sizing, safety factors, inertia or other similar
factors. Specifically, the torque and thrust generated at the maximum output torque and/or thrust of the
selected actuator shall be calculated and considered in the selection of the flange along with the ability of
the valve and actuator to withstand such torque and thrust forces.
5 Flange dimensions
Flanges for actuator attachment shall comply with the dimensions shown in Figure 2 and given in Table 2.
The method of attachment shall be by means of studs or through bolting.

oSIST prEN ISO 5210:2025
ISO/DIS 5210:2025(en)
Holes for the studs/bolts shall be positioned off-centre (see Figure 3 and Table 3), shall be equi-spaced and
shall conform to the requirements of ISO 273.
The interface on the valve shall have a recess corresponding to the diameter d . A spigot on the actuator is
optional.
The minimum values for dimension h shown in Table 2 apply to flanges having material of proof stress
R ≥ 200 MPa. The minimum values for dimension h applied to flanges having materials of proof stress
e 2
R ≤ 200 MPa shall be agreed between manufacturer and purchaser. The minimum values for dimension h
e 3
shall be at least 1 × d .
Dimension d has been based on providing sufficient landing for the nuts and bolt heads where applicable.
Such landing is defined as a radius from the bolt hole centre with the dimension (d − d ) / 2, and is a
1 3
minimum. The flange shape of both valve and actuator outside these areas of landing is left to the option of
the manufacturer.
The dimensions and bolting material are based on bolts in tension at a maximum stress of 290 MPa. On
agreement, between the manufacturer/supplier and purchaser, bolting material with different tensile
strength can be used, with no dimensional changes but with potential variation of the transmittable torque
and thrust value.
Figure 2 — Flange dimensions
Table 2 — Flange dimensions
Dimensions in millimetres
Dimensions Number of
studs or
Flange
c d
d h h h h h
1 a b 1 2 3 4 5 bolts
type
d d d d
2 3 4 5
min. max. min. min. min. min.
n
F05 ∅65 ∅35 ∅50 M6 ∅6,6 3 9 6 6 6 4
F07 ∅90 ∅55 ∅70 M8 ∅9 3 12 8 8 8 4
F10 ∅125 ∅70 ∅102 M10 ∅11 3 15 10 10 10 4
F12 ∅150 ∅85 ∅125 M12 ∅13,5 3 18 12 14 12 4
F14 ∅175 ∅100 ∅140 M16 ∅17,5 4 24 16 18 16 4
F16 ∅210 ∅130 ∅165 M20 ∅22 5 30 20 22 20 4
a
d shall be manufactured within the diameter tolerance f8.
b
d clearance holes for bolts and screws according to ISO 273.
c
h based on ISO 4033 – Hexagon high nuts (style 2).
d
h based on 1,0x d .
5 4
oSIST prEN ISO 5210:2025
ISO/DIS 5210:2025(en)
TTabablele 2 2 ((ccoonnttiinnueuedd))
Dimensions Number of
studs or
Flange
c d
d h h h h h
1 1 2 3 4 5 bolts
type a b
d d d d
2 3 4 5
min. max. min. min. min. min.
n
F25 ∅300 ∅200 ∅254 M16 ∅17,5 5 24 16 18 16 8
F30 ∅350 ∅230 ∅298 M20 ∅22 5 30 20 22 20 8
F35 ∅415 ∅260 ∅356 M30 ∅33 5 45 30 30 30 8
F40 ∅475 ∅300 ∅406 M36 ∅39 8 54 36 36 36 8
F48 ∅560 ∅370 ∅483 M36 ∅39 8 54 36 36 36 12
F60 ∅686 ∅470 ∅603 M36 ∅39 8 54 36 36 36 20
a
d shall be manufactured within the diameter tolerance f8.
b
d clearance holes for bolts and screws according to ISO 273.
c
h based on ISO 4033 – Hexagon high nuts (style 2).
d
h based on 1,0x d .
5 4
Figure 3 — Positions of the holes for the studs/bolts
Table 3 — Positions of holes
Flange type α/2
F05 to F16 45°
F25 to F40 22,5°
F48 15°
F60 9°
6 Designation
Flanges are designated by flange type according to Table 1.

oSIST prEN ISO 5210:2025
ISO/DIS 5210:2025(en)
7 Dimensions of driving and driven components
7.1 General
The dimensions of the driving and driven components shall comply with the dimensions given in Tables 4 to 8.
The depth of engagement of the valve-driven component into the actuator drive component and the
surface area of contact between the faces of the actuator drive component and the faces of the valve-driven
component, should be considered to ensure that the stresses caused by contact do not exceed the capability
of the component materials. In some cases it may be necessary to use materials with superior mechanical
properties and/or to reduce the output torque of the actuator.
7.2 Dimensions for assemblies capable of transmitting both torque and thrust: Group A
Dimensions for assemblies of group A shall be as shown in Figures 4 and 5, and given in Table 4.
Figure 4 — Driving component, group A

oSIST prEN ISO 5210:2025
ISO/DIS 5210:2025(en)
a) Example for rising stem b) Example for rising stem with c) Example for non-rising stem
limit stop
Figure 5 — Examples for rising and non-rising stem — Driven component, group A
For rising stem dimension d permits clearance for the rising and non-rotating stem and for any device to
restrict the downward travel of the valve stem.
For non-rising stem dimension d permits the clearance of the stem-locking and thrust-taking components
of the non-rising and rotating stem.
Table 4 — Dimensions for group A drive components
Dimensions in millimetres
a a
Flange type d min. d max. l min. h max.
6 6 1 3
F05 ∅18 ∅22 20 40
F07 ∅20 ∅26 25 60
F10 ∅28 ∅40 40 80
F12 ∅32 ∅48 48 95
F14 ∅36 ∅55 55 1
...