| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve device for a fuel tank capable of suppressing fuel from stagnating in a part hermetically closing the fuel tank from inside of the same.SOLUTION: A valve device for a fuel tank has a ventilation channel communicating inside of the fuel tank and outside of the fuel tank and a float 10 displacing to an upper position being a position closing the opening of the ventilation channel and a lower position being a position opening the opening of the ventilation passage by the fluctuation of the liquid level in the fuel tank, the upper part of the float 10 has an end surface being a flat surface closing the opening by the contact with the periphery of the opening and a peripheral surface extending downward from the outer fringe of the end surface, and the second intermediate outer peripheral surface 15s of the second intermediate cylinder part 15 constituting the peripheral surface has a part extending toward the downside of the end surface and the outside of the end surface. |
