| 摘要 |
A high pressure reciprocating pump is disclosed comprising a cylinder block with a pump chamber into which a pump plunger is reciprocally moved. A packing gland seals the pump plunger against leakage under high pressure. The pump has an inlet manifold on one side and an outlet or discharge manifold at one end secured on said cylinder block. Valve assemblies are positioned between the cylinder block and the inlet and outlet manifolds respectively. Each valve assembly comprises a disc-shaped cylindrical seat element with a central bore and a seat. A groove in the seat end surrounds the valve seating surface. The other side of the seat disc has a guide lip surrounded by a groove receiving an O-ring seal. A hollow cylindrical retainer cage having a segmented flange at one end is releasably received in the groove surrounding the seating surface with sufficient clearance to receive an O-ring seal. The retainer cage has apertures through the sidewall providing flow passageways therethrough and an integral web portion at the end opposite the flange. A generally cylindrical valve element has a seating surface configured to seat against the valve seat and is biased against the seat by a coiled spring positioned between the underside of the web portion of the cage and the valve element. The cage, seat disc, and spring can be replaced or reused when the valve disc is replaced. A modified seat disc having identical top and bottom surfaces may be inverted and reused.
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