ISO 20766-14:2022

INTERNATIONAL ISO
STANDARD 20766-14
First edition
2022-01
Road vehicles — Liquefied petroleum
gas (LPG) fuel system components —
Part 14:
Vaporizer/pressure regulator
Véhicules routiers — Équipements pour véhicules utilisant le gaz de
pétrole liquéfié (GPL) comme combustible —
Partie 14: Régulateur de pression/vapeur
Reference number
© ISO 2022
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
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 . 3
6.4.1 Requirements . 3
6.5 Insulation resistance. 4
6.6 Minimum opening voltage . . 4
6.7 Pressure impulse . 4
6.7.1 Internal impulse . 4
6.7.2 External impulse . 5
6.8 Water jacket freezing . 5
Bibliography . 6
iii
Foreword
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road Vehicles, Subcommittee SC 41,
Specific aspects for gaseous fuels.
A list of all parts in the ISO 20766 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
INTERNATIONAL STANDARD ISO 20766-14:2022(E)
Road vehicles — Liquefied petroleum gas (LPG) fuel system
components —
Part 14:
Vaporizer/pressure regulator
1 Scope
This document specifies general requirements for the vaporizer/pressure regulator, a component of
liquefied petroleum gas fuel, intended for use on the types of motor vehicles as defined in ISO 3833. It
also provides general design principles and specifies requirements for instructions and marking.
This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using gaseous fuels
in accordance with ISO 9162. It is not applicable to the following:
a) fuel containers;
b) stationary gas engines;
c) container mounting hardware;
d) electronic fuel management;
e) refuelling receptacles.
It is recognized that miscellaneous components not specifically addressed herein can be examined
for compliance with the criteria of any applicable part of the ISO 20766 series, including testing to the
appropriate functional tests.
All references to pressure in this document are considered gauge pressures unless otherwise specified.
This document applies to devices which have a service pressure in the range of 110 kPa (butane rich at
20 °C) and 840 kPa (propane at 20 °C), hereinafter referred to in this document. Other service pressures
can be accommodated by adjusting the pressure by the appropriate factor (ratio).
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 20766-1, Road vehicles — Liquefied petroleum gas (LPG) fuel systems components — Part 1: General
requirements and definitions
ISO 20766-2, Road vehicles — Liquefied pet
...