EVAPORATIVE GAS CHECK VALVE (TWO-WAY) CONSTRUCTION/OPERATION [ZY]

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• The evaporative gas check valve (two-way) is welded in the evaporative hose on the fuel tank and cannot be removed.

• Mainly consists of positive and negative pressure valves.

• The valve moves in response to the difference in air pressure between the fuel tank side and the atmospheric side, thereby changing the path of airflow.

• When the pressure in the fuel tank reaches positive pressure, the evaporative gas passage opens to introduce the evaporative gas from the fuel tank to the charcoal canister.

• When the pressure in the fuel tank becomes negative due to fuel consumption or other factors, the air path opens, drawing atmospheric air into the fuel tank.