| 摘要 |
A roll-over valve assembly is adapted for mounting on a fuel tank so as to expose internal portions of the valve mechanism to the tank headspace. Because liquid may slosh about in the tank, the valve includes a structure for shedding liquid fuel away from the main orifice so as to minimize intrusion of liquid fuel through the main orifice into an associated vapor control system to which the valve is connected. The roll-over valve further includes a relief and return vent valve mechanism which has a cooperative association with the tank headspace and the associated vapor control system. The valve assembly comprises a relatively small number of individual parts and it is cost effective for the various functions which it performs. The preferred embodiment utilizes a caged ball for closing the valve upon roll-over.
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