HYDRAULIC DIAPHRAGM PUMP

摘要

A high pressure hydraulic diaphragm pump (16) having a pressure chamber on one side of a diaphragm (128) and a fluid delivery chamber (136, 154) on the other side of the diaphragm (128) with a reciprocating piston assembly (50) including a piston member (66) being provided for pressurizing the hydraulic fluid in the pressure chamber and having the pressure chamber connected with a pressure regulator (52) which maintains the desired discharge pressure of the fluid and in which the piston assembly (50) is combined with a diaphragm positioning mechanism (84, 86, 88) for maintaining the diaphragm (128) at a desired position relative to the piston member (66) so as to assure full stroke of the diaphragm (128) during normal operation of the pump.