High pressure valve for positive pressure pumps including means for installing and removing the valve

A high pressure valve for a reciprocating pump of the type which has a tapered frusto-conical shaped non-threaded seat deck, comprising:

• a tubular seat element having an upper and lower end and having a frusto-conical exterior configuration dimensioned to be received in a pump tapered seat deck, the seat element having a centrally and coaxially positioned stem retainer portion having an internally threaded recess in the upper end, the exterior of the stem retainer portion being less than the tubular seat element interior diameter providing an annular flow passageway, including a plurality of spaced apart web members connected at their inner ends to said stem retainer portion and at their outer ends with the lower interior portion of seat element, the areas between such web members providing fluid passageways in the seat element, the upper end of the seat element providing a circumferential sealing surface, and the upper portion of the seat element interior surface above said web members being internally threaded providing means of removing the seat element from a pump seat deck;
• an elongated valve stem having an externally threaded lower end portion threadably received in said seat element stem retainer threaded recess;
• a valve disc having a central opening therein slideably receiving said valve stem, the disc having a lower sealing surface engageable with said seat element sealing surfaces;
• a compression spring received by said valve stem and engaging the upper surface of said valve disc for normally retaining said disc sealing surface in engagement with said seat element sealing surfaces;
• and
• means at the upper end of said valve stem for engaging the upper end of said spring.