NBN ISO 12614-4:2021

This document specifies tests and requirements for the manual valve, a liquefied natural gas fuel
system component intended for use on the types of motor vehicles defined in ISO 3833. This document
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 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 to be considered gauge pressures unless otherwise
specified.
This document is based upon a working pressure for natural gas as a fuel of 1,6 MPa (16 bar1)
). Other
working pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio).
For example, a 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25.