Burkert Werke Gmbh & Co.

Harald Boke

A pilot controlled valve for motor vehicle tank systems whose valve body consists of two parts (10, 12). In the first housing part (10) an inlet duct (14), an outlet duct (16), an annular valve seat (20) and an annular duct (18) surrounding the latter are formed. A valve closure member (24) is urged by a compression spring (26) into engagement with the valve seat (20) and on a side thereof remote from the valve seat defines a pressure equalizing space (22), which is formed in the second housing part and connects a pressure equalizing duct (52) with the inlet duct (14). By means of a pilot valve (30, 32) a flow path (42) between the pressure equalizing space (22) and the outlet duct (16) is controlled. In the pressure equalizing duct (52) a check valve (54, 56) is arranged adapted to shut in the direction of flow from the pressure equalizing space (22) to the inlet duct (14). This means that the valve is counter pressure resistant.

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Munich, Georgia

Harald Boke