DIAPHRAGM PUMP WITH CONTROL MODULE

摘要

A diaphragm pump assembly including a control module (14) for controlling the discharge and suction strokes of the diaphragm (16). The diaphragm divides a pump chamber into pumping and a pumpage chamber. The pump control module controls the communication of pressurized fluid to the pumping chamber. A fluid pressure operated actuator includes an actuating rod (50a) that connects to the diagram. A direction control valve (74) directs fluid pressure to the pumping chamber during a discharge and to an actuator retraction chamber during suction. An intermediate or detent valve controls a direction control valve. End of stroke sensors sense the actuating rod movement and apply pressure differential signals to the detent. Pressure regulators (72a, 72b) adjust the fluid pressure applied to the diaphragm during a discharge and the fluid pressure applied to the retraction chamber during retraction. An optional port feeds pressurized fluid to an actuator discharge stroke chamber during the discharge stroke.