FUEL-FILLER CAP CONSTRUCTION/OPERATION


BHE011642250T02

• Mainly consists of a positive pressure valve, negative pressure valve, spring, and O-ring.

• Discharges evaporative gas into the atmosphere when the pressure in the fuel tank becomes positive due to evaporative gas, draws air into the fuel tank when the pressure becomes negative.

• The positive and negative valves do not open under normal conditions because their opening pressure is higher than that of the check valve (two-way).

1
Spring
2
Valve
3
Spring