General Evaporative Emission Control Specifications
ROLLOVER/VENT VALVE OPERATIONFuel Tank Pressure To Open (Max.) 7.0 kPa (1.0 psi)
Air Pressure To Vent Tank (Max.) 4.9 kPa (0.7 psi)
Valve In Upright Position Open
Valve In Inverted Position Closed
TWO-WAY CHECK VALVE OPERATION [1]
Vacuum To Open Valve Port A [2] 37 mm Hg (1.46 in Hg)
Vacuum To Open Valve Port B [3] 44 mm Hg (1.73 in Hg)
[1] Air must flow easily under low pressure in either direction
[2] Fuel tank pressure
[3] Barometric pressure