| 摘要 |
A valve body main unit has a circular step surface facing a circular valve seat surface of a valve chamber formed on a terminal end part of a fuel supply path to a fuel tank and a circular groove with one groove wall extending from the circular step surface, and is normally urged in a direction of closing an inflow port surrounded by the circular valve seat surface. The valve body main unit also has an elastic seal body with a ring shape inserted into the circular groove of the valve body main unit. The elastic seal body has a circular fin-shaped part projecting from an outer perimeter part and pushed against the circular valve seat surface by the urging of the valve body main unit to close the valve.
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