Rubber component for fuel seal

Abstract

A rubber component that provides a fuel seal is provided which includes a base formed principally of fluorosilicon rubber or hydrin rubber, and a coating layer applied by coating to the base and formed principally of nylon or fluorine-contained resin.

What is claimed is:  
     
         1 . A valve assembly comprising: 
 a valve body that is movable in a vertical direction;    a valve seat that faces the valve body, said valve assembly being selectively placed in an open position when the valve body abuts on the valve seat, and in a closed position when the valve body is spaced from the valve seat; and    a diaphragm that surrounds the valve body such that the diaphragm is movable with the valve body, said diaphragm separating a first chamber communicating with a first atmosphere from a second chamber communicating with a second atmosphere different from the first atmosphere;    wherein the diaphragm comprises a base comprising a selected one of fluorosilicon rubber and hydrin rubber, and a coating layer comprising a selected one of nylon and fluorine-contained resin, said base being coated with the coating layer.