BS ISO 20766-12:2019 - Road vehicles. Liquefied petroleum gas (LPG) fuel systems components. Non-return valve

BS ISO 20766-12:2019

Road vehicles. Liquefied petroleum gas (LPG) fuel systems components. Non-return valve

Status : Current   Published : December 2019



This document specifies general information regarding the non-return valve component of liquefied petroleum gas fuel, intended for use on the types of motor vehicles as defined in ISO 3833. It provides general design principles and specifies requirements for instructions and marking. It also specifies test requirements for the non-return valve.

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:

  1. fuel containers;

  2. stationary gas engines;

  3. container mounting hardware;

  4. electronic fuel management;

  5. 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 ISO 20766 , 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).

Standard NumberBS ISO 20766-12:2019
TitleRoad vehicles. Liquefied petroleum gas (LPG) fuel systems components. Non-return valve
Publication Date17 December 2019
Normative References(Required to achieve compliance to this standard)ISO 20766-2:2018, ISO 20766-1
Informative References(Provided for Information)ISO 9162, ISO 3833
International RelationshipsISO 20766-12:2019
Draft Superseded By19/30377353 DC
DescriptorsValves, Components, Fuels, Liquefied petroleum gas, Road vehicles
Title in FrenchVéhicules routiers. Équipements pour véhicules utilisant le gaz de pétrole liquéfié (GPL) comme combustible Clapet anti-retour
ISBN978 0 539 00933 0
File Size1.025 MB

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