RECIPROCATING LIQUID PUMP WITH DISC CHECK VALVE

摘要

A manually operated pump (20) comprises a pump housing (22) and a plunger (24). The pump housing has a pump chamber (38) and an intake port. The plunger extends into the pump chamber. A piston (82) is on the plunger and is reciprocally and axially slidable within the pump chamber between a bottom stroke position and a top stroke position. The fluid pump further includes a priming valve (92), a check valve (48), a sealing plug (100), and a plug seat (43). The priming valve permits fluid to flow upward through the pump chamber when the piston stroke moves the piston downward from the top stroke positio n toward the bottom stroke position, and prevents fluid from flowing upward through the pump chamber when the piston stroke moves the piston upward from the bottom stroke position toward the top stroke position.