B250 3/4 Ton Van V8-318 5.2L VIN T FI (1992)
Evaporative Check Valve: Description and Operation
Rollover/Pressure Relief Valve
Pressure Relief/Rollover Valve
OPERATION
All vehicles have a combination pressure relief and rollover valve. The rollover valves relieve fuel tank pressure. They also prevent fuel flow
through the fuel tank vent hoses if a vehicle rollover occurs.
The valve incorporates a pressure relief mechanism that releases fuel tank pressure to atmosphere when fuel tank pressure increases above
calibrated sealing value.
