ISO 407:2023
(Main)Small medical gas cylinders — Pin-index yoke-type valve connections
Small medical gas cylinders — Pin-index yoke-type valve connections
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 noted that bar is not an SI unit, and that the corresponding SI unit for pressure is Pa (1 bar = 105 Pa = 105 N/m2). This document specifies: — basic dimensions; — requirements for alternative designs of the yoke-type valve connections; — dimensions and positions for the holes and pins for the outlet connections. It also specifies the dimensions and positions for the holes and pins for the outlet connections for gases and gas mixtures.
Petites bouteilles à gaz médicaux — Raccords de robinets du type étrier avec ergots de sécurité
Le présent document s’applique aux raccords de robinet du type étrier avec ergots de sécurité pour bouteilles à gaz médicaux d’une pression de service maximale de 200 bar et/ou d’une pression d’épreuve maximale de 300 bar. NOTE 1 Ce type de raccord est essentiellement utilisé pour les petites bouteilles (de 5 l ou moins). NOTE 2 Dans le présent document, l’unité de pression utilisée est le bar, en raison de son usage universel dans le domaine des gaz techniques. Il convient de noter toutefois que cette unité ne fait pas partie du Système international d'unités (SI), et que l'unité SI correspondante pour mesurer la pression est le pascal (Pa, 1 bar = 105 Pa = 105 N/m2). Le présent document spécifie: — les dimensions de base des raccords; — les exigences requises des variantes de construction des raccords de robinets du type étrier; — les dimensions et positions des trous et des ergots des raccords de sortie. Il spécifie également les dimensions et les positions des trous et des ergots des sorties de raccords pour les gaz et les mélanges de gaz.
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INTERNATIONAL ISO
STANDARD 407
Fifth edition
2023-07
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 407:2023(E)
© ISO 2023
---------------------- Page: 1 ----------------------
ISO 407:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 407:2023(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
2
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
2
8.3.8 Outlet connection for carbon dioxide (with or without liquid draw-off) and
for carbon dioxide/oxygen mixture (CO > 7 %) . 14
2
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
iii
© ISO 2023 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 407:2023(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).
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 fifth edition cancels and replaces the fourth edition (ISO 407:2021) of which it constitutes a minor
revision.
The main changes are as follows:
— correction of Figure 1.
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 2023 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 407:2023(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,
5
however, be noted that bar is not an SI unit, and that the corresponding SI unit for pressure is Pa (1 bar = 10 Pa =
5 2
10 N/m ).
This document specifies:
— basic dimensions;
— requirements for alternative designs of the yoke-type valve connections;
— dimensions and positions for the holes and pins for the outlet connections.
It also specifies the dimensions and positions for the holes and pins for the outlet connections for gases
and gas mixtures.
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 32, Gas cylinders for medical use — Marking for identification of content
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological 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/
4 Valve
Each small medical gas cylinder can be fitted with a yoke valve (see Clause 6). The yoke valve shall have
location holes of the dimensions and in the positions indicated in Clause 8 for the appropriate gas or gas
mixture (see Table 1).
The name or chemical symbol of the gas or gas mixture shall be clearly and indelibly stamped on the
valve.
1
© ISO 2023 – All rights reserved
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ISO 407:2023(E)
Table 1 — Allocated gases and gas mixtures
Gas or gas mixture Chemical symbol
oxygen O
2
oxygen/carbon dioxide (CO ≤ 7 %) O + CO
2 2 2
oxygen/helium (He ≤ 80 %) O + He
2
ethylene C H
2 4
nitrous oxide (with or without liquid draw-off) N O
2
cyclopropane C H
3 6
helium
He
helium/oxygen (O < 20 %)
2
carbon dioxide (with or without liquid draw-off)
CO
2
carbon dioxide/oxygen CO > 7 %
2
medical air Air
nominal mixture 50 % oxygen/50 % nitrous oxide (47,5 % < N O < 52,5 %) O + N O
2 2 2
nitrogen N
2
mixture of air, helium and carbon monoxide (CO < 1
...
NORME ISO
INTERNATIONALE 407
Cinquième édition
2023-07
Petites bouteilles à gaz médicaux —
Raccords de robinets du type étrier
avec ergots de sécurité
Small medical gas cylinders — Pin-index yoke-type valve connections
Numéro de référence
ISO 407:2023(F)
© ISO 2023
---------------------- Page: 1 ----------------------
ISO 407:2023(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2023
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
© ISO 2023 – Tous droits réservés
---------------------- Page: 2 ----------------------
ISO 407:2023(F)
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 1
4 Robinet . 1
5 Étrier . 2
6 Dimensions de base . 2
6.1 Généralités . 2
6.2 Corps de robinet du type étrier avec ergot de sécurité . 3
6.3 Système de raccord de robinet du type étrier avec un seul ergot de sécurité . 4
6.4 Système de raccord de robinet du type étrier avec deux ergots de sécurité sur
un seul rang . 4
6.5 Système de raccord de robinet du type étrier avec deux ergots de sécurité sur
deux rangs . 5
6.6 Dimensions de base . 5
7 Exigences pour variantes de construction de raccords de robinets du type étrier .6
7.1 Exigences de construction de l’étrier de fixation . 6
7.2 Exemples de variantes de construction pour l’étrier de fixation . 6
8 Dimensions et positions des trous et ergots pour raccords de robinets du type étrier .9
8.1 Généralités . 9
8.2 Raccord de sortie à système à un seul ergot . 9
8.3 Raccords de sortie à système à deux ergots sur un seul rang . 10
8.3.1 Raccord de sortie pour oxygène . 10
8.3.2 Raccord de sortie pour mélange oxygène/dioxyde de carbone (CO ≤ 7 %) . 11
2
8.3.3 Raccord de sortie pour mélange oxygène/hélium (He ≤ 80 %) . 11
8.3.4 Raccord de sortie pour éthylène .12
8.3.5 Raccord de sortie pour protoxyde d’azote (avec ou sans soutirage de liquide) .12
8.3.6 Raccord de sortie pour cyclopropane . 13
8.3.7 Raccord de sortie pour hélium et pour mélange hélium/oxygène (O < 20 %) .13
2
8.3.8 Raccord de sortie pour dioxyde de carbone (avec ou sans soutirage de
liquide) et pour mélange dioxyde de carbone/oxygène (CO > 7 %) . 14
2
8.3.9 Raccord de sortie pour air médical . 14
8.3.10 Raccord de sortie pour azote . 15
8.4 Raccord de sortie à système à deux ergots sur deux rangs . 15
iii
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ISO 407:2023(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner
l’utilisation d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité
et à l’applicabilité de tout droit de brevet revendiqué à cet égard. À la date de publication du présent
document, l’ISO n'avait pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa
mise en application. Toutefois, il y a lieu d’avertir les responsables de la mise en application du présent
document que des informations plus récentes sont susceptibles de figurer dans la base de données de
brevets, disponible à l'adresse www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne
pas avoir identifié tout ou partie de tels droits de propriété.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 58, Bouteilles à gaz, sous-comité SC 2,
Accessoires de bouteilles, en collaboration avec le comité technique CEN/TC 23, Bouteilles à gaz
transportables, du Comité européen de normalisation (CEN) conformément à l’Accord de coopération
technique entre l’ISO et le CEN (Accord de Vienne).
Cette cinquième édition annule et remplace la quatrième édition (ISO 407:2021) dont elle constitue une
révision mineure.
Les principales modifications sont les suivantes:
— correction de la Figure 1.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
iv
© ISO 2023 – Tous droits réservés
---------------------- Page: 4 ----------------------
NORME INTERNATIONALE ISO 407:2023(F)
Petites bouteilles à gaz médicaux — Raccords de robinets
du type étrier avec ergots de sécurité
1 Domaine d’application
Le présent document s’applique aux raccords de robinet du type étrier avec ergots de sécurité pour
bouteilles à gaz médicaux d’une pression de service maximale de 200 bar et/ou d’une pression d’épreuve
maximale de 300 bar.
NOTE 1 Ce type de raccord est essentiellement utilisé pour les petites bouteilles (de 5 l ou moins).
NOTE 2 Dans le présent document, l’unité de pression utilisée est le bar, en raison de son usage universel
dans le domaine des gaz techniques. Il convient de noter toutefois que cette unité ne fait pas partie du
Système international d'unités (SI), et que l'unité SI correspondante pour mesurer la pression est le pascal
5 5 2
(Pa, 1 bar = 10 Pa = 10 N/m ).
Le présent document spécifie:
— les dimensions de base des raccords;
— les exigences requises des variantes de construction des raccords de robinets du type étrier;
— les dimensions et positions des trous et des ergots des raccords de sortie.
Il spécifie également les dimensions et les positions des trous et des ergots des sorties de raccords pour
les gaz et les mélanges de gaz.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.
Pour les références non datées, la dernière édition du document de référence s'applique (y compris les
éventuels amendements).
ISO 32, Bouteilles à gaz pour usages médicaux — Marquage pour l'identification du contenu
3 Termes et définitions
Aucun terme n’est défini dans le présent document.
L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l'adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l'adresse https:// www .electropedia .org/
4 Robinet
Chaque petite bouteille pour gaz médical peut être pourvue d’un robinet à étrier (voir Article 6).
Le robinet à étrier doit comporter des trous dont les dimensions et les positions sont indiquées
dans l’Article 8 pour le gaz ou mélange de gaz approprié (voir Tableau 1).
Le nom ou le symbole chimique du gaz ou du mélange de gaz doit être marqué sur le robinet de façon
lisible et indélébile.
1
© ISO 2023 – Tous droits réservés
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ISO 407:2023(F)
Tableau 1 — Gaz et mélanges de gaz assignés
Gaz ou mélange de gaz Symbole chimique
oxygène O
2
oxygène/dioxyde de carbone (CO ≤ 7 %) O + CO
2 2 2
oxygène/hélium (He ≤ 80 %) O + He
2
éthylène C H
2 4
protoxyde d’azote (avec et sans soutirage) N O
2
cyclopropane C H
3 6
hélium
He
hélium/oxygène (O < 20 %)
2
dioxyde de carbone (avec et sans soutirage)
CO
2
dioxyde de carbone/oxygène CO > 7 %
2
air médical Air
mélange nominal de 50 % d’oxygène/50 % de protoxyde d’azote
O + N O
2 2
(47,5 % < N O < 52,5 %)
2
azote N
2
mélange d’air, d’hélium et de monoxyde de carbone (CO < 1 %) Air + He + CO
5 Étrier
L’étrier de fixation doit respecter les exigences et les dimensions données dans les Articles 6 et 7.
L’étrier doit être pourvu d’ergots dont les dimensions et les positions correspondent à celles des trous
du robinet, comme l’indique l’Article 8 pour le gaz ou mélange de gaz approprié.
Le nom ou le symbole chimique du gaz ou du mélange de gaz doit être marqué sur l’étrier de façon lisible
et indélébile. Si une couleur d’identification est appliquée, elle doit être en conformité avec l’ISO 32.
Des exemples de variantes pour la construction de l’étrier de fixation sont donnés en 7.2.
Aux Figures 3 et 4, les positions des trous d’ergots sont identifiées respectivement par des chiffres et
des lettres.
6 Dimensions de base
6.1 Généralités
Les dimensions de base des raccords de robinets du type étrier avec ergots de sécurité sont indiquées
aux Figures 1 à 4 et énumérées dans le Tableau 2.
2
© ISO 2023 – Tous droits réservés
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ISO 407:2023(F)
6.2 Corps de robinet du type étrier avec ergot de sécurité
Dimensions en millimètres
a
Applicable seulement aux robinets à une seule clé.
b
Envisager d’introduire un rayon de 0,5 mm afin d’éviter de concentrer les contraintes.
m
Rayon autorisé, à condition que la dimension c soit main
...
ISO/FDIS 407:2023(E)
Date: 2023-0102-22
ISO TC 58/SC 2/WG 11
Secretariat: AFNOR
Small medical gas cylinders — Pin -index yoke-type valve connections
Petites bouteilles à gaz médicaux — Raccords de robinets du type à étrier avec ergots de sécurité
© ISO 2023 – All rights reserved
---------------------- Page: 1 ----------------------
ISO/FDIS 407:2023(E)
© ISO 2023, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 407:2023(E)
Contents
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 . 2
6.3 Single-pin yoke-type valve connection system . 5
6.4 Two-pin yoke-type valve connection system with the pins in a single row . 6
6.5 Two-pin yoke-type valve connection system with the pins in a double row . 7
6.6 Basic dimensions . 7
7 Requirements for alternative designs of yoke-type valve connections . 8
7.1 Requirements for the design of the connecting yoke . 8
7.2 Examples of alternative construction for the connecting yoke . 9
8 Dimensions and positions of the holes and pins for yoke-type valve connections . 14
8.1 General . 14
8.2 Outlet connection with single-pin system . 14
8.3 Outlet connections with two-pin/single-row system . 16
8.3.1 Outlet connection for oxygen . 16
8.3.2 Outlet connection for oxygen/carbon dioxide mixture (CO ≤ 7 %) . 17
2
8.3.3 Outlet connection for oxygen/helium mixture (He ≤ 80 %) . 18
8.3.4 Outlet connection for ethylene . 19
8.3.5 Outlet connection for nitrous oxide (with or without liquid draw-off) . 20
8.3.6 Outlet connection for cyclopropane . 21
8.3.7 Outlet connection for helium and for helium/oxygen mixture (O < 20 %) . 22
2
8.3.8 Outlet connection for carbon dioxide (with or without liquid draw-off) and for
carbon dioxide/oxygen mixture (CO > 7 %) . 23
2
8.3.9 Outlet connection for medical air . 24
8.3.10 Outlet connection for nitrogen . 25
8.4 Outlet connection with two-pin/double-row system . 26
© ISO 2023 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 407:2023(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).
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 fifth edition cancels and replaces the fourth edition (ISO 407:200212021) of which it constitutes a
minor revision.
The main changes compared to the previous edition are as follows:
— correction of Figure 1.
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 2023 – All rights reserved
---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 407:2023(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,
5
however, be noted that bar is not an SI unit, and that the corresponding SI unit for pressure is Pa (1 bar = 10 Pa =
5 2
10 N/m ).
This document specifies:
— basic dimensions;
— requirements for alternative designs of the yoke-type valve connections;
— dimensions and positions for the holes and pins for the outlet connections.
It also specifies the dimensions and positions for the holes and pins for the outlet connections for gases
and gas mixtures.
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 32, Gas cylinders for medical use — Marking for identification of content
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/https://www.electropedia.org/
4 Valve
Each small medical gas cylinder can be fitted with a yoke valve (see Clause 6). The yoke valve shall have
location holes of the dimensions and in the positions indicated in Clause 8 for the appropriate gas or gas
mixture (see Table 1).
© ISO 2023 – All rights reserved 1
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ISO/FDIS 407:2023(E)
The name or chemical symbol of the gas or gas mixture shall be clearly and indelibly stamped on the
valve.
Table 1 — Allocated gases and gas mixtures
Gas or gas mixture Chemical symbol
oxygen O
2
oxygen/carbon dioxide (CO2 ≤ 7 %) O2 + CO2
oxygen/helium (He ≤ 80 %) O2 + He
ethylene C H
2 4
nitrous oxide (with or without liquid draw-off) N2O
cyclopropane C H
3 6
helium
He
helium/oxygen (O2 < 20 %)
carbon dioxide (with or without liquid draw-off)
CO2
carbon dioxide/oxygen CO > 7 %
2
medical air Air
nominal mixture 50 % oxygen/50 % nitrous oxide (47,5 % < N O < 52,5 %) O + N O
2 2 2
nitrogen N2
mixture of air, helium and carbon monoxide (CO < 1 %) Air + He + CO
5 Yoke
The connecting yoke shall conform to the requirements and dimensions given in Clauses 6 and 7. The
yoke shall be fitted with pins, the dimensions and the positions of which correspond to the holes in the
valve as indicated in Clause 8 for the appropriate gas or gas mixture.
The name or chemical symbol of the gas or gas mixture shall be clearly and indelibly stamped on the yoke.
If an identification colour is used, it shall be in conformity with ISO 32.
Examples of the alternative designs for the connecting yoke are given in 7.2.
In Figures 3 and 4, the circled numbers and letters are the pin-hole positions.
6 Basic dimensions
6.1 General
The basic dimensions for pin-index yoke-type valve connections are shown in Figures 1 to 4 and are listed
in Table 2.
6.2 Pin-index yoke-type valve body
Dimensions in millimetres
2 © ISO 2023 – All rights reserved
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ISO/FDIS 407:2023(E)
Note
© ISO 2023 – All rights reserved 3
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ISO/FDIS 407:2023(E)
a
Applicable only to single-key valves.
b
Consider introduction of radius of 0,5 mm to avoid stress concentration.
m
Radius permitted, provided dimension c is maintained.
Figure 1 — Pin-index y
...
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 407
ISO/TC 58/SC 2
Small medical gas cylinders — Pin-
Secretariat: AFNOR
index yoke-type valve connections
Voting begins on:
2023-03-08
Petites bouteilles à gaz médicaux — Raccords de robinets du type
étrier avec ergots de sécurité
Voting terminates on:
2023-05-31
ISO/CEN PARALLEL PROCESSING
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 407:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023
---------------------- Page: 1 ----------------------
ISO/FDIS 407:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 407
ISO/TC 58/SC 2
Small medical gas cylinders — Pin-
Secretariat: AFNOR
index yoke-type valve connections
Voting begins on:
Petites bouteilles à gaz médicaux — Raccords de robinets du type
étrier avec ergots de sécurité
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
ISO/CEN PARALLEL PROCESSING
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
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THEY ARE AWARE AND TO PROVIDE SUPPOR TING
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DOCUMENTATION.
Phone: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: copyright@iso.org
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/FDIS 407:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
© ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023
---------------------- Page: 2 ----------------------
ISO/FDIS 407:2023(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
2
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
2
8.3.8 Outlet connection for carbon dioxide (with or without liquid draw-off) and
for carbon dioxide/oxygen mixture (CO > 7 %) . 14
2
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
iii
© ISO 2023 – All rights reserved
---------------------- Page: 3 ----------------------
ISO/FDIS 407:2023(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).
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 fifth edition cancels and replaces the fourth edition (ISO 407:2021) of which it constitutes a minor
revision.
The main changes are as follows:
— correction of Figure 1.
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 2023 – All rights reserved
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 407:2023(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,
5
however, be noted that bar is not an SI unit, and that the corresponding SI unit for pressure is Pa (1 bar = 10 Pa =
5 2
10 N/m ).
This document specifies:
— basic dimensions;
— requirements for alternative designs of the yoke-type valve connections;
— dimensions and positions for the holes and pins for the outlet connections.
It also specifies the dimensions and positions for the holes and pins for the outlet connections for gases
and gas mixtures.
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 32, Gas cylinders for medical use — Marking for identification of content
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological 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/
4 Valve
Each small medical gas cylinder can be fitted with a yoke valve (see Clause 6). The yoke valve shall have
location holes of the dimensions and in the positions indicated in Clause 8 for the appropriate gas or gas
mixture (see Table 1).
The name or chemical symbol of the gas or gas mixture shall be
...
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