PRESSURE RELIEF VALVE WITH SINGULAR BODY

摘要

A pressure relief valve includes a singular body that encloses a seat and a stationary shim, a poppet, within the singular body, that is forced against a seat by a spring attached to the stationary shim, and a pin inserted into the pressure relief valve body to lock the pressure relief valve into a housing bore. The poppet includes a nose extension that extends into a void enclosed by the seat to provide damping. The seat includes a non-threaded stepped region on its outer surface and the singular body includes a complementary stepped region on its inner surface such that when the seat is fit into the singular body, the stepped region of the seat and the complementary stepped region of the singular body interface with each other to prevent movement of the seat toward the spring. The pin includes a coating to reduce friction and galling.

主权项

1. A method for assembling a pressure relief valve, comprising:
fitting a seat for receiving a poppet into a singular body; inserting the poppet and a spring into the singular body; and fitting a stationary shim into the singular body for holding an end of the spring stationary with respect to the singular body, wherein the seat is fit into the singular body for receiving the poppet; and fitting a retainer into the singular body to support the stationary shim, wherein the seat includes a non-threaded stepped region on its outer surface and the singular body includes a complementary stepped region on its inner surface such that when the seat is fit into the singular body, the stepped region of the seat and the complementary stepped region of the singular body interface with each other to prevent movement of the seat toward the spring.