Abstract: A fluid valve assembly suitable for a number of different uses, including use as a fluid pressure regulator for a pump whose output pressure is to be kept uniform for changing load conditions. The assembly includes a housing, a pair of relatively shiftable valve members in the housing, and means biasing the valve members together. Each valve member has a face which is contiguous to the corresponding face of the other members. One of the valve members has a central orifice therethrough and its face surrounds the orifice to present a land having a length from the orifice to the outer periphery of its corresponding face greater than the diameter of the orifice. The face of a first of the valve members is preferably tapered to present a transversely wedge-shaped space between said faces to facilitate separation of the valve member to open the valve formed thereby. The housing has a fluid inlet in communication with the region surrounding the valve members and a fluid outlet communicating with said orifice.