ISO 12619-4:2016

INTERNATIONAL ISO
STANDARD 12619-4
First edition
2016-08-15
Road vehicles — Compressed gaseous
hydrogen (CGH2) and hydrogen/
natural gas blends fuel system
components —
Part 4:
Check valve
Véhicules routiers — Composants des circuits d’alimentation pour
hydrogène gazeux comprimé (CGH2) et mélanges de gaz naturel et
hydrogène —
Partie 4: Clapet de nonretour
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Markings . 2
5 Construction and assembly . 2
6 Tests . 2
6.1 Applicability . 2
6.2 Hydrostatic strength . 3
6.3 Leakage . 3
6.4 Continued operation . 4
Bibliography . 5
Foreword
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The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific
aspects for gaseous fuels.
ISO 12619 consists of the following parts, under the general title Road vehicles — Compressed gaseous
hydrogen (CGH2) and hydrogen/natural gas blends fuel system components:
— Part 1: General requirements and definitions
— Part 2: Performance and general test methods
— Part 3: Pressure regulator
— Part 4: Check valve
— Part 5: Manual cylinder valve
— Part 6: Automatic valve
iv © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 12619-4:2016(E)
Road vehicles — Compressed gaseous hydrogen
(CGH2) and hydrogen/natural gas blends fuel system
components —
Part 4:
Check valve
1 Scope
This part of ISO 12619 specifies general requirements and definitions of compressed gaseous hydrogen
(CGH2) and hydrogen/natural gas blends fuel system components, intended for use on the types of
motor vehicles defined in ISO 3833. It also provides general design principles and specifies requirements
for instructions and markings.
It is applicable to vehicles using compressed gaseous hydrogen (CGH2) in accordance with ISO 14687-1
or ISO 14687-2 and hydrogen/natural gas blends using natural gas in accordance with ISO 15403-1 and
ISO/TR 15403-2. It is not applicable to the following:
a) liq
...