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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