EN ISO 407:2021

SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN ISO 407:2005
Male plinske jeklenke za uporabo v medicini - Ventilski priključni nastavki po
sistemu pin-index (ISO 407:2021)
Small medical gas cylinders - Pin-index yoke-type valve connections (ISO 407:2021)
Kleine Gasflaschen für die medizinische Anwendung - Ventilseitenstutzen mit
Anschlussbügel nach dem PIN-Index-System (ISO 407:2021)
Petites bouteilles à gaz médicaux - Raccords de robinets du type étrier avec ergots de
sécurité (ISO 407:2021)
Ta slovenski standard je istoveten z: EN ISO 407:2021
ICS:
11.040.10 Anestezijska, respiratorna in Anaesthetic, respiratory and
reanimacijska oprema reanimation equipment
23.020.35 Plinske jeklenke Gas cylinders
23.060.40 Tlačni regulatorji Pressure regulators
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 407
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 11.040.10 Supersedes EN ISO 407:2004
English Version
Small medical gas cylinders - Pin-index yoke-type valve
connections (ISO 407:2021)
Petites bouteilles à gaz médicaux - Raccords de Kleine Gasflaschen für die medizinische Anwendung -
robinets du type étrier avec ergots de sécurité (ISO Ventilseitenstutzen mit Anschlussbügel nach dem PIN-
407:2021) Index-System (ISO 407:2021)
This European Standard was approved by CEN on 13 May 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 407:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 407:2021) has been prepared by Technical Committee ISO/TC 58 "Gas
cylinders" in collaboration with Technical Committee CEN/TC 23 “Transportable gas cylinders” the
secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2021, and conflicting national standards
shall be withdrawn at the latest by December 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 407:2004.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 407:2021 has been approved by CEN as EN ISO 407:2021 without any modification.

INTERNATIONAL ISO
STANDARD 407
Fourth edition
2021-06
Small medical gas cylinders — Pin-
index yoke-type valve connections
Petites bouteilles à gaz médicaux — Raccords de robinets du type
étrier avec ergots de sécurité
Reference number
ISO 407:2021(E)
©
ISO 2021
ISO 407:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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below or ISO’s member body in the country of the requester.
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 407:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Valve . 1
5 Yoke . 2
6 Basic dimensions. 2
6.1 General . 2
6.2 Pin-index yoke-type valve body. 3
6.3 Single-pin yoke-type valve connection system. 4
6.4 Two-pin yoke-type valve connection system with the pins in a single row . 4
6.5 Two-pin yoke-type valve connection system with the pins in a double row . 5
6.6 Basic dimensions . 5
7 Requirements for alternative designs of yoke-type valve connections .6
7.1 Requirements for the design of the connecting yoke . 6
7.2 Examples of alternative construction for the connecting yoke . 6
8 Dimensions and positions of the holes and pins for yoke-type valve connections .9
8.1 General . 9
8.2 Outlet connection with single-pin system . 9
8.3 Outlet connections with two-pin/single-row system .10
8.3.1 Outlet connection for oxygen .10
8.3.2 Outlet connection for oxygen/carbon dioxide mixture (CO ≤ 7 %) .11
8.3.3 Outlet connection for oxygen/helium mixture (He ≤ 80 %) .11
8.3.4 Outlet connection for ethylene .12
8.3.5 Outlet connection for nitrous oxide (with or without liquid draw-off) .12
8.3.6 Outlet connection for cyclopropane .13
8.3.7 Outlet connection for helium and for helium/oxygen mixture (O < 20 %) .13
8.3.8 Outlet connection for carbon dioxide (with or without liquid draw-off)
and for carbon dioxide/oxygen mixture (CO > 7 %) .14
8.3.9 Outlet connection for medical air .14
8.3.10 Outlet connection for nitrogen .15
8.4 Outlet connection with two-pin/double-row system .15
ISO 407:2021(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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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 58, Gas cylinders, Subcommittee SC 2,
Cylinders fittings, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 23, Transportable gas cylinders, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 407:2004), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— addition of a note in Figure 1 on the introduction of a radius to avoid stress concentration;
— addition of dimension m in Figure 1;
— revision of the basic dimensions for pin index yoke type value connections (see Table 2);
— addition of a requirement for the design of the connecting yoke.
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 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 407:2021(E)
Small medical gas cylinders — Pin-index yoke-type valve
connections
1 Scope
This document is applicable to pin-index yoke-type valve connections for medical gas cylinders, with
a working pressure up to a maximum of 200 bar or test pressure up to a maximum of 300 bar, or both.
NOTE 1 This type of connection is primarily used for small cylinders (5 l or below).
NOTE 2 In this document the unit bar is used, due to its universal use in the field of technical gases. It should,
however, be not
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