ISO 5211
(Main)Industrial valves — Part-turn actuator attachments
Industrial valves — Part-turn actuator attachments
ISO 5211:2017 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. ISO 5211:2017 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.
Robinetterie industrielle — Raccordement des actionneurs à fraction de tour
ISO 5211:2017 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. ISO 5211:2017 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.
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INTERNATIONAL ISO/FDIS
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STANDARD 5211
ISO/TC 153
Industrial valves — Part-turn actuator
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ISO/FDIS 5211:2023(E)
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NATIONAL REGULATIONS. © ISO 2023
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ISO/FDIS 5211:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 5211
ISO/TC 153
Industrial valves — Part-turn actuator
Secretariat: AFNOR
attachments
Voting begins on:
2023-05-16
Robinetterie industrielle — Raccordement des actionneurs à fraction
de tour
Voting terminates on:
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BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
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LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
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ii
© ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023
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ISO/FDIS 5211:2023(E)
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 . 3
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 . 9
7.4 Drive by flat head . 10
7.5 Drive by improved flat head .12
7.6 Drive by involute spline . 13
7.7 Drive by bi-square . 14
8 Position of driven components at interface below part-turn actuator .15
8.1 Drive by key(s) . 15
8.2 Drive by parallel or diagonal square head or bi-square . 17
8.3 Drive by flat head . 18
9 Dowel pins .18
Annex A (informative) Explanation of calculations .20
Annex B (normative) Dimensions of keys and keyways .22
Bibliography .28
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ISO/FDIS 5211:2023(E)
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 5211:2017), 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
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ISO/FDIS 5211:2023(E)
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 actuator, the multi-turn attachment to the gearbox is in accordance with ISO 5210:2023, 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 combi-
a multi-turn actuator nation of a multi-turn
and a gearbox) actuator and a gearbox)
Key
1 partturn actuator 5 gearbox
2 interface (see this document) 6 interface (see ISO 5210)
3 valve 7 multiturn actuator
4 intermediate support
Figure 1 — Interface between part-turn actuator and valve
v
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 5211:2023(E)
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
ISO 41561, Straight cylindrical involute splines — Metric module, side fit — Part 1: Generalities
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 (3.5) and/or thrust.
1
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ISO/FDIS 5211:2023(E)
3.2
multi-turn actuator
actuator (3.1) which transmits torque (3.5) to the valve for at least one revolution and may be capable
of withstanding thrust
Note 1 to entry: An actuator may be a combination of a multi-turn actuator and multi-turn gearbox (3.4).
3.3
part-turn actuator
actuator (3.1) which transmits torque (3.5) to the valve for a rotation of one revolution or less and does
not have to withstand axial thrust
Note 1 to entry: A part-turn actuator may be a combination of a multi-turn actuator (3.2) and partturn gearbox
(3.4).
3.4
gearbox
any mechanism designed to reduce the torque (3.5) required to operate a valve
3.5
torque
turning moment transmitted through the mounting flanges and connection components
Note 1 to entry: Torque is expressed in newton-metres.
4 Maximum flange torques
The flange torque shall comply with the values listed in Table 1 which represent the maximum torques
which can be transmitted through the mounting flange.
Table 1 — Maximum flange torque values
Maximum flange torque
Flange type
[Nm]
F03 32
F04 63
F05 125
F07 250
F10 500
F12 1 000
F14 2 000
F16 4 000
F25 8 000
F30 16 000
F35 32 000
F40 63 000
F48 125 000
F60 250 000
F80 500 000
F100 1 000 000
The values specified in Table 1 have been defined on the basis of bolts in tension only 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 values. See Annex A for more details
on the calculation method.
2
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ISO/FDIS 5211:2023(E)
The selection of flange types for a particular application should take into account the additional torques
that may be generated because of inertia or other factors.
5 Flange dimensions
Flanges for part-turn actuator attachments shall comply with the dimensions shown in Figure 2 and
given in Table 2. The method of attachment shall be by means of studs, screws or through bolting. When
through bolting is used, the diameter of the clearance holes shall permit the use of bolts of a size given
by the corresponding dimension d in Table 2.
4
Holes for the studs, screws or bolts shall be equi-spaced and positioned off-centre (see Figure 3 and
Table 3) and shall conform to the requirements of ISO 273.
The flange on the valve shall have a recess corresponding to the diameter d . A spigot on the partturn
2
actuator is optional.
The minimum values for dimension h shown in Table 2 apply to flanges having material of proof stress
2
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
e
h shall be at least 1 × d .
3 4
Dimension d has been based on providing sufficient landing for the nuts and bolt heads where
1
applicable. Such landing is defined as a radius from the bolt hole centre with the dimension (d − d ) / 2,
1 3
and is a 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.
Above flange type F60 alternative dimensions and/or torque ratings may be used on agreement
between manufacturer/supplier and purchaser.
Figure 2 — Flange dimensions
3
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ISO/FDIS 5211:2023(E)
Table 2 — Flange dimensions
Dimensions in millimetres
Dimensions Number of
screws, studs
a
Flange
d d d d h h h
1 2 3 4 1 2 3
or bolts
type
min. max. min. min.
n
F03 ∅46 ∅25 ∅36 M5 3 8 5 4
F04 ∅54 ∅30 ∅42 M5 3 8 5 4
F05 ∅65 ∅35 ∅50 M6 3 9 6 4
F07 ∅90 ∅55 ∅70 M8 3 12 8 4
F10 ∅125 ∅70 ∅102 M10 3 15 10 4
F12 ∅150 ∅85 ∅125 M12 3 18 12 4
F14 ∅175 ∅100 ∅140 M16 4 24 16 4
F16 ∅210 ∅130 ∅165 M20 5 30 20 4
F25 ∅300 ∅200 ∅254 M16 5 24 16 8
F30 ∅350 ∅230 ∅298 M20 5 30 20 8
F35 ∅415 ∅260 ∅356 M30 5 45 30 8
F40 ∅475 ∅300 ∅406 M36 8 54 36 8
F48 ∅560 ∅370 ∅483 M36 8 54 36 12
F60 ∅686 ∅470 ∅603 M36 8 54 36 20
F80 ∅900 ∅670 ∅813 M42 10 63 42 20
F100 ∅1 200 ∅870 ∅1 042 M42 10 63 42 32
a
d shall be manufactured within the diameter tolerance f8.
2
Figure 3 — Position of holes
Table 3 — Position of holes
Flange type α/2
F03 to F16 45°
F25 to F40 22,5°
F48 15°
F60 to F80 9°
4
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ISO/FDIS 5211:2023(E)
TTabablele 3 3 ((ccoonnttiinnueuedd))
Flange type α/2
F100 5,625°
6 Designation
Partturn valve actuator attachments shall be designated as follows:
— flange designation:
— flange type as per Table 1;
— a capital letter for spigot identification:
— Y with spigot;
— N without spigot;
— drive designation:
— an additional capital letter for drive identification:
— V for single-key drive;
— W for 90° two-key drive;
— X for 180° two-key drive;
— L for parallel square drive;
— D for diagonal square drive;
— H for flat head drive;
— G for improved flat head drive;
— S for involute spline;
— T for bi-square;
— the actual dimensions of the drive (in millimetres):
— dimension d for key drives (see Figure 4 and Table 4);
7
— dimension s for square or flat drives (see Figures 5 or 6 and Table 5 or Figure 7 and Table 6);
— module m for involute spline (see Figure 9 and Table 8).
EXAMPLE
5
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ISO/FDIS 5211:2023(E)
ISO 5211 – F05 Y – V – 18, identifies a part-turn valve actuator attachment in accordance with this
document, with F05 flange type, spigot and single-key drive with 18 mm diameter.
NOTE The designation is not a marking requirement.
7 Dimensions and torques
7.1 General
To ensure that no interference can occur between the driving component and the driven component,
the length of the driven component above the interface shall be limited so that there is a clearance
between both parts.
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 Drive by key(s)
Dimensions of the drive components for key drive shall meet the requirements of Figure 4 and Table 4.
The values of d , h and l in Table 4 are based on single-key design up to 98 mm shaft diameter.
7 4 5
Where more than one key is required to transmit the torque, the dimensions in Table 4 shall still apply.
The key dimensions shall conform with those given in Annex B.
The keyway(s) in the driving component shall correspond to the position of the key(s) supplied on the
driven component as specified in 8.1, Figures 11, 12 or 13.
The key(s) shall be secured in position by suitable means.
6
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ISO/FDIS 5211:2023(E)
Key
1 interface
Figure 4 — Drive by key(s)
7
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ISO/FDIS 5211:2023(E)
8
© ISO 2023 – All rights reserved
Table 4 — Dimensions and torques for drive by key(s)
Dimensions in millimetres
Max.
Flange flange h l
4 5
a, b, g
d
f 7
type torque max. min.
[Nm]
c
F05 125 3,0 30 ∅12 ∅14 ∅18 ∅22 — — — — — — — — — — — — — — — — —
c
F07 250 3,0 35 — ∅14 ∅18 ∅22 ∅28 — — — — — — — — — — — — — — — —
c
F10 500 3,0 45 — — ∅18 ∅22 ∅28 ∅36 ∅42 — — — — — — — — — — — — — —
c
F12 1 000 3,0 55 — — — ∅22 ∅28 ∅36 ∅42 ∅48 ∅50 — — — — — — — — — — — —
c
F14 2 000 5,0 65 — — — — ∅28 ∅36 ∅42 ∅48 ∅50 ∅60 — — — — — — — — — — —
c
F16 4 000 5,0 80 — — — — — ∅42 ∅48 ∅50 ∅60 ∅72 ∅80 — — — — — — — — —
c
F25 8 000 5,0 110 — — — — — — — ∅48 ∅50 ∅60 ∅72 ∅80 ∅98 ∅100 — — — — — — —
c
F30 16 000 5,0 130 — — — — — — — — — ∅60 ∅72 ∅80 ∅98 ∅100 ∅120 — — — — — —
F35 32 000 5,0 180 — — — — — — — — — — — — — — ∅160 — — — — —
F40 63 000 8,0 200 — — — — — — — — — — — — — — — — ∅180 — — — —
F48 125 000 8,0 250 — — — — — — — — — — — — — — — — — ∅220 — — —
F60 250 000 8,0 310 — — — — — — — — — — — — — — — — — ∅280 — —
F80 500 000 10 455 — — — — — — — — — — — — — — — — — — — ∅350 —
F100 1 000 000 10 655 — — — — — — — — — — — — — — — — — — — — ∅440
Max. transmissible torque
e e e e e e e e
32 63 125 250 500 1 000 1 500 2 000 3 000 4 000 8 000 12 000 16 000
d
Nm
a
For flange types F05 to F30, other dimensions of d between those indicated are permitted.
7
b
For flange types above F30, the given d values correspond to the maximum and any value up to this maximum is permitted, subject to considerations in footnote d.
7
c
Indicates the preferred dimension.
d
For flange types F05 to F30, these values are the corresponding torques which can be transmitted by the driving components having the d dimensions. They are based on a maximum allowable torsional stress of 280 MPa
7
for the driven component.
e
The maximum transmissible torques shall be determined by calculation.
f
h min = 0,5 mm.
4
g
d shall be manufactured within the diameter tolerance H9.
7
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ISO/FDIS 5211:2023(E)
7.3 Drive by parallel or diagonal square head
Dimensions of drive components for square heads shall meet the requirements of Figures 5 or 6 and
Table 5. The choice of d and d depends on the manufacturing process.
8 9
The square drive positions shall be as specified in 8.2, Figures 14 or 15.
Key
1 interface
Figure 5 — Drive by parallel square head
Key
1 interface
Figure 6 — Drive by diagonal square head
9
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ISO/FDIS 5211:2023(E)
Table 5 — Dimensions and torques for drive by parallel or diagonal square head
Dimensions in millimetres
Max.
flange
Flange h
4 e
s
d torque a
type max.
[Nm]
F03 32 1,5 9 — — — — — — — — — —
b
F04 63 1,5 9 11 — — — — — — — — —
b
F05 125 3,0 9 11 14 — — — — — — — —
b
F07 250 3,0 — 11 14 17 — — — — — — —
b
F10 500 3,0 — — 14 17 19 22 — — — — —
b
F12 1 000 3,0 — — — 17 19 22 27 — — — —
b
F14 2 000 5,0 — — — — — 22 27 36 — — —
b
F16 4 000 5,0 — — — — — — 27 36 46 — —
b
F25 8 000 5,0 — — — — — — — 36 46 55 —
b
F30 16 000 5,0 — — — — — — — — 46 55 75
d min ∅12,1 ∅14,1 ∅18,1 ∅22,2 ∅25,2 ∅28,2 ∅36,2 ∅48,2 ∅60,2 ∅72,2 ∅98,2
8
d max ∅9,5 ∅11,6 ∅14,7 ∅17,9 ∅20 ∅23,1 ∅28,4 ∅38 ∅48,5 ∅57,9 ∅79,1
9
l min 10 12 16 19 21 24 29 38 48 57 77
5
Max. transmissible
torque 32 63 125 250 350 500 1 000 2 000 4 000 8 000 16 000
c
[Nm]
a
h min. = 0,5 mm.
4
b
Indicates the preferred dimension.
c
Maximum transmissible torques are based on a maximum allowable torsional stress of 280 MPa for the driven
component.
d
Further sizes are not considered and may be discussed between supplier and the manufacturer.
e
s shall be manufactured within the linear tolerance H11.
7.4 Drive by flat head
Dimensions of drive components for flat head drive shall meet the requirements of Figure 7 and Table 6.
The flat head drive position shall be as specified in 8.3 and Figure 16.
10
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ISO/FDIS 5211:2023(E)
Key
1 interface
Figure 7 — Drive by flat head
Table 6 — Dimensions and torques for drive by flat head
Dimensions in millimetres
Max.
flange
Flange h
4 e
s
torque
d a
type max.
[Nm]
F03 32 1,5 9 — — — — — — — — — —
b
F04 63 1,5 9 11 — — — — — — — — —
b
F05 125 3,0 9 11 14 — — — — — — — —
b
F07 250 3,0 — 11 14 17 — — — — — — —
b
F10 500 3,0 — 14 17 19 22 — — — — —
b
F12 1 000 3,0 — — — 17 19 22 27 — — — —
b
F14 2 000 5,0 — — — — — 22 27 36 — — —
b
F16 4 000 5,0 — — — — — — 27 36 46 — —
b
F25 8 000 5,0 — — — — — — — 36 46 55
b
F30 16 000 5,0 — — — — — — — 46 55 75
d min. ∅12,1 ∅14,1 ∅18,1 ∅22,2 ∅25,2 ∅28,2 ∅36,2 ∅48,2 ∅60,2 ∅72,2 ∅98,2
8
l min. 16 19 25 30 34 39 48 64 82 99 135
5
Max. transmissible torque
32 63 125 250 350 500 1 000 2 000 4 000 8 000 16 000
c
[Nm]
a
h min. = 0,5 mm.
4
b
Indicates the preferred dimension.
c
Maximum transmissible torques are based on a maximum allowable torsional stress of 280 MPa for the driven
component.
d
Further sizes are not considered and may be discussed between supplier and manufacturer.
e
s shall be manufactured within the linear tolerance H11.
11
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ISO/FDIS 5211:2023(E)
7.5 Drive by improved flat head
Dimensions of drive components for improved flat head drive shall meet the requirements of Figure 8
and Table 7. The improved flat head drive position shall be as specified in 8.3 and Figure 16.
Key
1 interface
Figure 8 — Drive by improved flat head
Table 7 — Dimensions and torques for drive by improved flat head
Dimensions in millimetres
Max.
flange
Flange h
4 b
s
d torque a
type max.
[Nm]
F03 32 1,5 8 — — — — — — — — —
F04 63 1,5 — 9,5 — — — — — — — —
F05 125 3,0 — — 12 — — — — — — —
F07 250 3,0 — — — 15 — — — — — —
F10 500 3,0 — — — — 19 — — — — —
F12 1 000 3,0 — — — — — 24 — — — —
F14 2 000 5,0 — — — — — — 32 — — —
F16 4 000 5,0 — — — — — — — 40 — —
F25 8 000 5,0 — — — — — — — — 48 —
F30 16 000 5,0 — — — — — — — — 66
d min. ∅12,1 ∅14,1 ∅18,1 ∅22,2 ∅28,2 ∅36,2 ∅48,2 ∅60,2 ∅72,2 ∅98,2
8
l min. 12 15 18 22 28 36 40 44 52 70
5
a
h min. = 0,5 mm.
4
b
s shall be manufactured within the linear tolerance H11.
c
Maximum transmissible torques are based on a maximum allowable torsional stress of 280 MPa for the driven
component.
d
Further sizes are not considered and may be discussed between supplier and manufacturer.
12
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ISO/FDIS 5211:2023(E)
TTabablele 7 7 ((ccoonnttiinnueuedd))
Max.
flange
Flange h
4 b
s
d torque a
type max.
[Nm]
Max. transmissible torque
32 63 125 250 500 1 000 2 000 4 000 8 000 16 000
c
[Nm]
a
h min. = 0,5 mm.
4
b
s shall be manufactured within the linear tolerance H11.
c
Maximum transmissible torques are based on a maximum allowable torsional stress of 280 MPa for the driven
component.
d
Further sizes are not considered and may be discussed between supplier and manufacturer.
7.6 Drive by involute spline
Dimensions of drive components for involute spline shall meet the requirements of Figure 9 and Table 8.
NOTE Involute spline is according to ISO 41561.
Key
1 interface
Figure 9 — Drive by involute spline
13
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ISO/FDIS 5211:2023(E)
Table 8 — Dimensions and torques for drive by involute spline
Dimensions in millimetres
Max.
flange
Flange h
4 b
d
d torque a 11
type max.
[Nm]
F03 32 1,5 ∅16,1 — — — — — — — — —
F04 63 1,5 — ∅19,1 — — — — — — — —
F05 125 3,0 — — ∅24,1 — — — — — — —
F07 250 3,0 — — — ∅28,1 — — — — — —
F10 500 3,0 — — — — ∅36,1 — — — — —
F12 1 000 3,0 — — — — — ∅47,1 — — — —
F14 2 000 5,0 — — — — — — ∅60,1 — — —
F16 4 000 5,0 — — — — — — — ∅74,1 — —
F25 8 000 5,0 — — — — — — — — ∅88,1 —
F30 16 000 5,0 — — — — — — — — ∅116,1
d min. ∅14,5 ∅17 ∅21,5 ∅25 ∅32 ∅42 ∅54 ∅67 ∅80 ∅106
10
Module m
1,5 2,0 2,5 3,0 4,0 5,0 6,0 7,0 8,0 10
(according to ISO 41561)
l min. 12 15 18 22 28 36 40 44 52 70
5
Max. transmissible torque
32 63 125 250 500 1 000 2 000 4 000 8 000 16 000
c
[Nm]
a
h = 0,5 mm.
4 min.
b
d shall be manufactured within the diameter tolerance H9.
11
c
Maximum tran
...
ISO/FDIS 5211:2023(E)
ISO/TC 153/WG 1
Secretariat: AFNOR
Date: 2023-04-0528
Industrial valves — Part-turn actuator attachments
Robinetterie industrielle — Raccordement des actionneurs à fraction de tour
FDIS stage
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ISO/FDIS 5211:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical,
including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can
be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii
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ISO/FDIS 5211:2023(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Maximum flange torques . 3
5 Flange dimensions . 4
6 Designation . 7
7 Dimensions and torques . 9
7.1 General . 9
7.2 Drive by key(s) . 9
7.3 Drive by parallel or diagonal square head . 13
7.4 Drive by flat head . 15
7.5 Drive by improved flat head . 17
7.6 Drive by involute spline . 18
7.7 Drive by bi-square . 20
8 Position of driven components at interface below part-turn actuator . 21
8.1 Drive by key(s) . 21
8.2 Drive by parallel or diagonal square head or bi-square . 24
8.3 Drive by flat head . 25
9 Dowel pins . 26
Annex A (informative) Explanation of calculations . 27
A.1 Basis of torque values for flange sizes . 27
A.2 Coefficient of friction of 0,2 . 27
A.3 Tension stress bolts . 27
Annex B (normative) Dimensions of keys and keyways . 29
B.1 Basis for keys and keyways dimensioning . 29
B.2 Key and keyway forms . 29
B.3 Dimensions and tolerances (cross section and design details) . 30
Bibliography . 35
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ISO/FDIS 5211:2023(E)
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/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
www.iso.org/patents. ISO shall not be held responsible for identifying any or all
database available at
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 62069, 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 5211:2017), which has been technically
revised.
The main changes are as follows:
— — dimensions and tolerances for keys and keyways were added in a new Annex BAnnex B;;
— — a reference to the new Annex BAnnex B was added in 7.27.2;
— 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
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ISO/FDIS 5211:2023(E)
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 hasis, in general, to be 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 actuator, the multi-turn attachment to the gearbox is in accordance with ISO 5210:2023, 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 c) Direct interface d) Intermediate support
support interface (when combination of interface (when
a multi-turn actuator combination of a multi-
and a gearbox) turn actuator 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
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ISO/FDIS 5211:2023(E)
Figure 1 — Interface between part-turn actuator and valve
vi
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ISO/FDIS 5211:2023(E)
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 1Figures 1 a) and 11 c)] or to intermediate supports [see Figures 1Figures 1 b) and 11 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.
NOTE 1 In this document, the term “valve” may 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 actuator, the multi-turn attachment to the gearbox is in accordance with ISO 5210:2017, 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).
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ISO/FDIS 5211:2023(E)
a) Direct interface b) Intermediate c) Direct interface d) Intermediate support
support interface (when combination of interface (when
a multi-turn actuator combination of a multi-
and a gearbox) turn actuator and a
gearbox)
Key
1 part-turn actuator 5 gearbox
2 interface (see ISO 5211) 6 interface (see ISO 5210)
3 valve 7 multi-turn actuator
4 intermediate support
Figure 1 — Interface between part-turn actuator and valve
162 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
ISO 4156--1, Straight cylindrical involute splines — Metric module, side fit — Part 1: Generalities
173 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminologicalterminology databases for use in standardization at the following
addresses:
— — IEC Electropedia: available at
2
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ISO/FDIS 5211:2023(E)
— — 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 (3.5) and/or thrust.
3.2
multi-turn actuator
actuator (3.1) which transmits torque (3.5) to the valve for at least one revolution and may be capable of
withstanding thrust
Note 1 to entry: An actuator may be a combination of a multi-turn actuator and multi-turn gearbox (3.4.).
3.3
part-turn actuator
actuator (3.1) which transmits torque (3.5) to the valve for a rotation of one revolution or less and does
not have to withstand axial thrust
Note 1 to entry: A part-turn actuator may be a combination of a multi-turn actuator (3.2) and part-turn gearbox
(3.4.).
3.4
gearbox
any mechanism designed to reduce the torque (3.5) required to operate a valve
3.5
torque
turning moment transmitted through the mounting flanges and connection components
Note 1 to entry: Torque is expressed in newton-metres.
184 Maximum flange torques
The flange torque shall comply with the values listed in Table 1Table 1 which represent the maximum
torques which can be transmitted through the mounting flange.
Table 1 — Maximum flange torque values
Maximum flange torque
Flange type
[Nm]
F03 32
F04 63
F05 125
F07 250
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ISO/FDIS 5211:2023(E)
Maximum flange torque
Flange type
[Nm]
F10 500
F12 1 000
F14 2 000
F16 4 000
F25 8 000
F30 16 000
F35 32 000
F40 63 000
F48 125 000
F60 250 000
F80 500 000
F100 1 000 000
The values specified in Table 1Table 1 have been defined on the basis of bolts in tension only 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 values. See Annex AAnnex A for more
details on the calculation method.
The selection of flange types for a particular application should take into account the additional torques
that may be generated because of inertia or other factors.
195 Flange dimensions
Flanges for part-turn actuator attachments shall comply with the dimensions shown in Figure 2Figure 2
and given in Table 2Table 2. The method of attachment shall be by means of studs, screws or through
bolting. When through bolting is used, the diameter of the clearance holes shall permit the use of bolts of
a size given by the corresponding dimension d in Table 2Table 2.
4
Holes for the studs, screws or bolts shall be equi-spaced and positioned off-centre (see Figure 3Figure 3
and Table 3Table 3)) and shall conform to the requirements of ISO 273.
The flange on the valve shall have a recess corresponding to the diameter d . A spigot on the part-turn
2
actuator is optional.
The minimum values for dimension h shown in Table 2Table 2 apply to flanges having material of proof
2
stress R ≥ 200 MPa. The minimum values for dimension h applied to flanges having materials of proof
e 2
stress R ≤ 200 MPa shall be agreed between manufacturer and purchaser. The minimum values for
e
dimension h shall be at least 1 × d .
3 4
Dimension d has been based on providing sufficient landing for the nuts and bolt heads where
1
applicable. Such landing is defined as a radius from the bolt hole centre with the dimension (d − d ) / 2,
1 3
and is a 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
4
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ISO/FDIS 5211:2023(E)
strength can be used, with no dimensional changes but with potential variation of the transmittable
torque.
Above flange type F60 alternative dimensions and/or torque ratings may be used on agreement between
manufacturer/supplier and purchaser.
Figure 2 — Flange dimensions
Table 2 — Flange dimensions
Dimensions in millimetres
Dimensions Number of
screws, studs or
Flange
a
d d d d h h h
1 2 3 4 1 2 3
bolts
type
min. max. min. min.
n
F03 ∅46 ∅25 ∅36 M5 3 8 5 4
F04 ∅54 ∅30 ∅42 M5 3 8 5 4
F05 ∅65 ∅35 ∅50 M6 3 9 6 4
F07 ∅90 ∅55 ∅70 M8 3 12 8 4
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ISO/FDIS 5211:2023(E)
Dimensions Number of
screws, studs or
Flange
a
d1 d2 d3 d4 h1 h2 h3
bolts
type
min. max. min. min.
n
F10 ∅125 ∅70 ∅102 M10 3 15 10 4
F12 ∅150 ∅85 ∅125 M12 3 18 12 4
F14 ∅175 ∅100 ∅140 M16 4 24 16 4
F16 ∅210 ∅130 ∅165 M20 5 30 20 4
F25 ∅300 ∅200 ∅254 M16 5 24 16 8
F30 ∅350 ∅230 ∅298 M20 5 30 20 8
F35 ∅415 ∅260 ∅356 M30 5 45 30 8
F40 ∅475 ∅300 ∅406 M36 8 54 36 8
F48 ∅560 ∅370 ∅483 M36 8 54 36 12
F60 ∅686 ∅470 ∅603 M36 8 54 36 20
F80 ∅900 ∅670 ∅813 M42 10 63 42 20
F100 ∅1 200 ∅870 ∅1 042 M42 10 63 42 32
a
d2 shall be manufactured within the diameter tolerance f8.
6
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ISO/FDIS 5211:2023(E)
Figure 3 — Position of holes
Table 3 — Position of holes
Flange type α/2
F03 to F16 45°
F25 to F40 22,5°
F48 15°
F60 to F80 9°
F100 5,625°
206 Designation
Part-turn valve actuator attachments shall be designated as follows:
— — flange designation:
— — flange type as per Table 1Table 1;;
— — a capital letter for spigot identification:
— — Y with spigot;
— — N without spigot;
— — drive designation:
— — an additional capital letter for drive identification:
— — V for single-key drive;
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ISO/FDIS 5211:2023(E)
— — W for 90° two-key drive;
— — X for 180° two-key drive;
— — L for parallel square drive;
— — D for diagonal square drive;
— — H for flat head drive;
— — G for improved flat head drive;
— — S for involute spline;
— — T for bi-square;
— — the actual dimensions of the drive (in millimetres):
— — dimension d for key drives (see Figure 4Figure 4 and Table 4Table 4););
7
— — dimension s for square or flat drives (see Figures 5Figures 5 or 66 and
Table 5Table 5 or Figure 7Figure 7 and Table 6Table 6););
— — module m for involute spline (see Figure 9Figure 9 and Table 8Table 8).).
EXAMPLE
8
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ISO/FDIS 5211:2023(E)
ISO 5211 – F05 Y – V – 18, identifies a part-turn valve actuator attachment in accordance with this
document, with F05 flange type, spigot and single-key drive with 18 mm diameter.
NOTE The designation is not a marking requirement.
217 Dimensions and torques
21.17.1 General
To ensure that no interference can occur between the driving component and the driven component, the
length of the driven component above the interface shall be limited so that there is a clearance between
both parts.
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.
21.27.2 Drive by key(s)
Dimensions of the drive components for key drive shall meet the requirements of Figure 4Figure 4 and
Table 4Table 4.
The values of d , h and l in Table 4Table 4 are based on single-key design up to 98 mm shaft diameter.
7 4 5
Where more than one key is required to transmit the torque, the dimensions in Table 4Table 4 shall still
apply.
The key dimensions shall conform with those given in Annex BAnnex B.
The keyway(s) in the driving component shall correspond to the position of the key(s) supplied on the
driven component as specified in 8.1, Figures 118.1, Figures 11, 12, 12 or 1313.
The key(s) shall be secured in position by suitable means.
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ISO/FDIS 5211:2023(E)
Key
1 interface
Figure 4 — Drive by key(s)
10
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ISO/FDIS 5211:2023(E)
Table 4 — Dimensions and torques for drive by key(s))
Dimensions in millimetres
Max. flange
Flange h 4 l 5
a, b, g
torque d
7
f
type max. min.
[Nm]
c
F05 125 3,0 30 ∅12 ∅14 ∅18 ∅22 — — — — — — — — — — — — — — — — —
c
F07 250 3,0 35 — ∅14 ∅18 ∅22 ∅28 — — — — — — — — — — — — — — — —
c
F10 500 3,0 45 — — ∅18 ∅22 ∅28 ∅36 ∅42 — — — — — — — — — — — — — —
c
F12 1 000 3,0 55 — — — ∅22 ∅28 ∅36 ∅42 ∅48 ∅50 — — — — — — — — — — — —
c
F14 2 000 5,0 65 — — — — ∅28 ∅36 ∅42 ∅48 ∅50 ∅60 — — — — — — — — — — —
c
F16 4 000 5,0 80 — — — — — ∅42 ∅48 ∅50 ∅60 ∅72 ∅80 — — — — — — — — —
c
F25 8 000 5,0 110 — — — — — — — ∅48 ∅50 ∅60 ∅72 ∅80 ∅98 ∅100 — — — — — — —
c
F30 16 000 5,0 130 — — — — — — — — — ∅60 ∅72 ∅80 ∅98 ∅100 ∅120 — — — — — —
F35 32 000 5,0 180 — — — — — — — — — — — — — — ∅160 — — — — —
F40 63 000 8,0 200 — — — — — — — — — — — — — — — — ∅180 — — — —
F48 125 000 8,0 250 — — — — — — — — — — — — — — — — — ∅220 — — —
F60 250 000 8,0 310 — — — — — — — — — — — — — — — — — ∅280 — —
F80 500 000 10 455 — — — — — — — — — — — — — — — — — — — ∅350 —
F100 1 000 000 10 655 — — — — — — — — — — — — — — — — — — — — ∅440
Max. transmissible torque
e e e e e e e e
32 63 125 250 500 1 000 1 500 2 000 3 000 4 000 8 000 12 000 16 000
d
Nm
a
For flange types F05 to F30, other dimensions of d between those indicated are permitted.
7
b
For flange types above F30, the given d7 values correspond to the maximum and any value up to this maximum is permitted, subject to considerations in footnote d.
c
Indicates the preferred dimension.
d
For flange types F05 to F30, these values are the corresponding torques which can be transmitted by the driving components having the d dimensions. They are based on a maximum allowable torsional
7
stress of 280 MPa for the driven component.
e
The maximum transmissible torques shall be determined by calculation.
f
h4 min = 0,5 mm.
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ISO/FDIS 5211:2023(E)
Max. flange
Flange h l
4 5
a, b, g
torque d
7
f
type max. min.
[Nm]
g
d7 shall be manufactured within the diameter tolerance H9.
12
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ISO/FDIS 5211:2023(E)
21.37.3 Drive by parallel or diagonal square head
Dimensions of drive components for square heads shall meet the requirements of Figures 5Figures 5 or
66 and Table 5Table 5. The choice of d and d depends on the manufacturing process.
8 9
The square drive positions shall be as specified in 8.28.2, Figures 14, Figures 14 or 1515.
Key
1 interface
Figure 5 — Drive by parallel square head
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ISO/FDIS 5211:2023(E)
Key
1 interface
Figure 6 — Drive by diagonal square head
Table 5 — Dimensions and torques for drive by parallel or diagonal square head
Dimensions in millimetres
Max. flange
Flange h
4
e
torque
s
d a
type max.
[Nm]
F03 32 1,5 9 — — — — — — — — — —
b
F04 63 1,5 9 11 — — — — — — — — —
14
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ISO/FDIS 5211:2023(E)
Max. flange
Flange h4
e
torque
s
d a
type max.
[Nm]
b
F05 125 3,0 9 11 14 — — — — — — — —
b
F07 250 3,0 — 11 14 17 — — — — — — —
b
F10 500 3,0 — — 14 17 19 22 — — — — —
b
F12 1 000 3,0 — — — 17 19 22 27 — — — —
b
F14 2 000 5,0 — — — — — 22 27 36 — — —
b
F16 4 000 5,0 — — — — — — 27 36 46 — —
b
F25 8 000 5,0 — — — — — — — 36 46 55 —
b
F30 16 000 5,0 — — — — — — — — 46 55 75
d min ∅12,1 ∅14,1 ∅18,1 ∅22,2 ∅25,2 ∅28,2 ∅36,2 ∅48,2 ∅60,2 ∅72,2 ∅98,2
8
d9 max ∅9,5 ∅11,6 ∅14,7 ∅17,9 ∅20 ∅23,1 ∅28,4 ∅38 ∅48,5 ∅57,9 ∅79,1
l min 10 12 16 19 21 24 29 38 48 57 77
5
Max. transmissible torque
32 63 125 250 350 500 1 000 2 000 4 000 8 000 16 000
c c
Nm [Nm]
a
h4 min. = 0,5 mm.
b
Indicates the preferred dimension.
c
Maximum transmissible torques are based on a maximum allowable torsional stress of 280 MPa for the driven component.
d
Further sizes are not considered and may be discussed between supplier and the manufacturer.
e
s shall be manufactured within the linear tolerance H11.
21.47.4 Drive by flat head
Dimensions of drive components for flat head drive shall meet the requirements of Figure 7Figure 7 and
Table 6Table 6.
The flat head drive position shall be as specified in 8.38.3 and Figure 16Figure 16.
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ISO/FDIS 5211:2023(E)
Key
1 interface
Figure 7 — Drive by flat head
Table 6 — Dimensions and torques for drive by flat head
Dimensions in millimetres
Max.
flange
Flange h4
e
s
d a
torque
type max.
[Nm]
F03 32 1,5 9 — — — — — — — — — —
b
F04 63 1,5 9 11 — — — — — — — — —
b
F05 125 3,0 9 11 14 — — — — — — — —
b
F07 250 3,0 — 11 14 17 — — — — — — —
b
F10 500 3,0 — 14 17 19 22 — — — — —
b
F12 1 000 3,0 — — — 17 19 22 27 — — — —
b
F14 2 000 5,0 — — — — — 22 27 36 — — —
b
F16 4 000 5,0 — — — — — — 27 36 46 — —
b
F25 8 000 5,0 — — — — — — — 36 46 55
b
F30 16 000 5,0 — — — — — — — 46 55 75
d8 min. ∅12,1 ∅14,1 ∅18,1 ∅22,2 ∅25,2 ∅28,2 ∅36,2 ∅48,2 ∅60,2 ∅72,2 ∅98,2
l min. 16 19 25 30 34 39 48 64 82 99 135
5
Max. transmissible torque
32 63 125 250 350 500 1 000 2 000 4 000 8 000 16 000
c c
Nm [Nm]
16
16 ©ISO 2023 — All rights reserved
© ISO 2023 – All rights reserved
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ISO/FDIS 5211:2023(E)
Max.
flange
Flange h4
e
s
d a
torque
type max.
[Nm]
a
h4 min. = 0,5 mm.
b
Indicates the preferred dimension.
c
Maximum transmissible torques are based on a maximum allowable torsional stress of 280 MPa for the driven component.
d
Further sizes are not considered and may be discussed between supplier and manufacturer.
e
s shall be manufactured within the linear tolerance H11.
21.57.5 Drive by improved flat head
Dimensions of drive components for improved flat head drive shall meet the requirements of
Figure 8Figure 8 and Table 7Table 7. The improved flat head drive position shall be as specified in 8.38.3
and Figure 16Figure 16.
Key
1 interface
Figure 8 — Drive by improved flat head
©ISO 2023 — All rights reserved 17
---------------------- Page: 23 ----------------------
ISO/FDIS 5211:2023(E)
Table 7 — Dimensions and torques for drive by improved flat head
Dimensions in millimetres
Max. flange
Flange h4
b
torque
s
d a
type max.
[Nm]
F03 32 1,5 8 — — — — — — — — —
F04 63 1,5 — 9,5 — — — — — — — —
F05
...
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