Patent ID: 6231323
Filing Date: 2001-05-15
Classification: F04B,F16K,Y10T

Abstract:
A valve cartridge for positioning in an opening between a manifold block and a mounting plate of a high pressure reciprocating pump with a reciprocating piston adjacent said valve cartridge for operation of said pump in a suction stroke and a power stroke; said valve cartridge comprising:a body having a cylindrical bore defining an inner peripheral surface and an annular valve seat adjacent an end of said bore;a discharge valve member having a cylindrical body mounted within said bore against said inner peripheral surface with one end of said valve member adjacent said piston and an opposed end of said valve member being closed and having an enlarged diameter to define a seating surface for engaging said valve seat; said discharge valve member having a circumferential wall defining a central bore, said circumferential wall having a plurality of openings adjacent closed end;resilient means continuously urging said discharge valve member into sealing relation with said valve seat;a pump chamber defined between said piston and said discharge valve member; anda suction valve member having a cylindrical sleeve slidably mounted about said discharge valve member for guiding said suction valve member and permitting fluid to enter said pump chamber during the suction stroke of said piston; said piston in the power stroke forcing fluid through said discharge valve member for unseating of said discharge valve member and discharge of pressurized fluid through said openings past said seat into a discharge chamber;the effective area of the discharge chamber being greater than the effective area of the pump chamber for urging hydraulically said body against said mounting plate.