CAN/CSA/ANSI LNG 3.3-2018
Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 3: Check valve
This part of ISO 12614 specifies tests and requirements for the check valve, a liquefied natural gas fuel
system component intended for use on the types of motor vehicles defined in ISO 3833.
This part of ISO 12614 is not applicable to the following:
a) fuel containers;
b) stationary gas engines;
c) container mounting hardware;
d) electronic fuel management;
e) refueling receptacles.
NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to
meet the criteria of this part of ISO 12614 and tested according to the appropriate functional tests.
NOTE 2 All references to pressure in this part of ISO 12614 are to be considered gauge pressures unless
NOTE 3 This part of ISO 12614 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, 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25.