VALVE MIXED OPENING VALVE IN PUMP WITH RETURN AND TRANSFER PISTON MOVEMENT

摘要

The hydraulic part (15) is declared for a multistage pumping unit (12) with reciprocating piston movement, containing at least three holes (61) or (91) under the plunger, each for receiving a plunger (35) of reciprocating stroke, where each hole for the plunger has an axis (65) or (95) holes for the plunger. Moreover, the axis of the holes for the plunger is made through a hydraulic pressure to determine the central hole for the plunger and the side holes for the plunger located on both sides of the central hole for the plunger. The hydraulic part (15) has openings (59) or (89) of suction valves, where each opening of the suction valve accepts a suction valve (41) and has an axis (63) or (93) of the openings of the suction valve. The openings (57) or (87) of the unloading valves, where each opening of the unloading valve accepts the unloading valve (43) and has an axis (63) or (93) of the unloading valve. The axes of at least one of the openings of the suction and discharge valves are offset in the hydraulic part from their respective axes of the plunger openings.