Pilot valve for fluid flow control has pair of housing shells with membranes defining pressure chambers to control outlet diaphragm with conical support

摘要

The pilot valve for fluid flow control has a pair of symmetrical casing shells (1,2) with a membrane (9,10) defining a pair of elongated semi-elliptical chambers (3,4) between the ends of two fluid flow pipes (5,6). The outlet pipe can have a conical flow body to form a support (7) for a diaphragm (8) when closed.