A diaphragm valve with elements fixing a peripheral edge portion on a liquid side of a diaphragm arranged in opposition to a valve seat within a valve body, on an annular diaphragm mounting seat provided in a predetermined portion of said valve body,MULTI-FUNCTIONAL WATER PUMP CONTROL VALVEand driving an actuation shaft of a valve operating portion connected to a central portion on a back surface of said diaphragm back and forth in an axial direction to abutting and releasing positions of the liquid side of the diaphragm with respect to said valve seat for opening and closing a flow passage,Balance Valves comprising: an annular base provided to project from a seat surface of said mounting seat for a predetermined height and connected with a bracket mounting flange on the side of said valve operating portion by bolts; and a diaphragm retaining portion formed integrally with said flange for compressing the peripheral edge portion of said diaphragm with a constant pressure so that said flange and said base are connected by said bolts in the condition where said diaphragm is compressed onto said base with said constant pressure by said diaphragm retaining portion.

MORE NEWS