Valve for reciprocating pump assembly

A valve member for an inlet or outlet valve of a reciprocating pump assembly, the valve member comprising:

• a valve body defining a first axis;
• an outside annular cavity formed in the valve body;
• and
• a seal extending within the outside annular cavity and comprising a first tapered and circumferentially-extending surface adapted to sealingly engage a tapered surface of a valve seat of the inlet or outlet valve, the valve seat defining a second axis with which the first axis of the valve body is adapted to be coaxial;
• a counterbore formed in the valve body along the first axis, the counterbore comprising an enlarged-diameter portion and a reduced-diameter portion, the reduced-diameter portion defining a fluid passage through the valve body, wherein the counterbore defines an internal shoulder in the valve body extending radially between the enlarged-diameter portion and the reduced-diameter portion;
• and
• a rupture disc assembly comprising a rupture disc disposed in the enlarged-diameter portion and engaging the internal shoulder.