VENT VALVE ASSEMBLY AND ITS ARRANGEMENT

摘要

PROBLEM TO BE SOLVED: To provide a ventilation valve assembly which can reduce a manufacturing cost, and permits use of a common valve adapted to tanks of different depths. SOLUTION: A valve assembly 10 for limiting fuel charging is arranged on an access opening of a fuel tank. The assembly 10 has a ventilation port of steam gas for a canistor, a charging ventilation port, an air shutter and pressure relief valve 30. A header 12 including the pressure relief valve is arranged in a closed manner on the access opening 36 of the tank. An extending member 40 having a neck 48 is attached to a lower surface of the header 12. A ventilation float valve 38 is attached to an end of the neck 48. Adjustment corresponding to different depth of the tank is performed by using the extended members 40 having the neck of different lengths. The float valve 38 and the header 12 can be replaced with each other.