ISO 15500-6:2020

INTERNATIONAL ISO
STANDARD 15500-6
Third edition
2020-08
Road vehicles — Compressed natural
gas (CNG) fuel system components —
Part 6:
Automatic valve
Véhicules routiers — Composants des systèmes de combustible gaz
naturel comprimé (GNC) —
Partie 6: Valve automatique
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Marking . 2
5 Construction and assembly . 2
6 Tests . 3
6.1 Applicability . 3
6.2 Hydrostatic strength . 3
6.3 Leakage . 3
6.4 Continued operation . 3
6.5 Insulation resistance . 4
6.6 Minimum opening voltage . 4
6.7 Pressure impulse . 4
Bibliography . 6
Foreword
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 41,
Specific aspects for gaseous fuels.
This third edition cancels and replaces the second edition (ISO 15500-6:2012), which has been
technically revised. It also incorporates the Amendment ISO 15500-6:2012/Amd.1:2016. The main
changes compared to the previous edition are as follows:
— serial number or data code became mandatory in marking;
— update of minimum opening voltage clause.
A list of all parts in the ISO 15500 series can be found on the ISO website.
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 2020 – All rights reserved

Introduction
For the purposes of this document, all fuel system components in contact with natural gas have been
considered suitable for natural gas as defined in the ISO 15403 series. However, it is recognized that
miscellaneous components not specifically covered herein can be examined to meet the criteria of this
document and tested according to the appropriate functional tests.
All references to pressure in this document are considered to be gauge pressures unless otherwise
specified.
1)
This document is based on a service pressure for natural gas used as fuel of 20 MPa [200 bar ] settled
at 15 °C. Other service pressures can be accommodated by adjusting the pressure by the appropriate
factor (ratio). For example, a 25 MPa (250 bar) service pressure system will require pressures to be
multiplied by 1,25.
5 2
1)  1 bar = 0,1 MPa = 10 Pa;1 MPa = 1 N/mm .
INTERNATIONAL STANDARD ISO 15500-6:2020(E)
Road vehicles — Compressed natural gas (CNG) fuel system
components —
Part 6:
Automatic valve
1 Scope
This document specifies tests and requirements for the automatic valve, a compressed natural gas
(CNG) fuel system component intended for use on the types of motor vehicles defined in ISO 3833.
This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using natural gas in
accordance with the ISO 15403 series.
It is not applicable to the following:
a) liquefied natural ga
...