NG Fuel Pressure Regulator

Fuel pressure regulator contains a 275 psi (1896 kPa) check valve that protects the low pressure system. When natural gas expands, fuel temperature decreases. Causing an extreme drop in temperature; to as low as -160°F (-177°C) . To prevent damaging synthetic fuel system components or causing water vapor within fuel to condense, engine coolant is routed through pressure regulator to warm fuel before it expands. The regulator has an internal thermostat to control flow of engine coolant, preventing overheating and thinning of fuel which could cause lean combustion. When coolant temperature increases to about 100°F (82°C), regulator thermostat closes and outlet coolant flow is restricted.