Printed in U.S.A.
CNG FUEL SYSTEM COMPONENTS
(CONTINUED)
C.CNG Fuel System Components (Continued)
9. Pressure Relief Devices
The Pressure Relief Devices (PRD) are thermally-
activated valves that open at a temperature of
approximately 230°F. In the event of a fire, they are
designed to release the fuel stored in the cylinders a
safe distance from the vehicle to prevent over-
pressurizing the fuel cylinders. When activated, the
PRD cannot be closed and will vent all gas.
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