Valve plug for pressure regulator

摘要

A valve plug comprising a cylindrical body having an annular flange with a top surface, a bottom surface, and a circumference is disclosed. The valve plug further comprises an annular recess disposed in the bottom surface of the flange, and a plurality of holes disposed in the top surface of the flange. Each hole extends into the recess to create a plurality of channels extending between the bottom and top surfaces of the flange. Each channel of the plurality of channels includes a stepped portion. A polyurethane sealing member is disposed within each channel and includes: a top portion forming a continuous bond on the top surface and along the circumference of the flange; a central portion forming a horizontal bond on each stepped portion; and a bottom portion forming a sealing surface adapted to sealingly engage a seating surface of the seat.

主权项

1. A valve plug adapted for sealing engagement with a seat, the valve plug comprising:
a cylindrical body having an annular flange radially extending therefrom, the flange having a top surface, a bottom surface and a circumference; an annular recess disposed in the bottom surface of the flange; a plurality of holes disposed in the top surface of the flange, each hole of the plurality of holes extending into the annular recess to create a plurality of channels extending between the bottom surface of the flange and the top surface of the flange, and each channel of the plurality of channels including a stepped portion; an annular groove disposed between the annular recess and the plurality of holes, the annular groove providing a path between each hole of the plurality of holes that extends along the circumference of the flange; and a sealing member disposed within the at least one channel, the sealing member having a top portion that extends through the annular groove between each hole of the plurality of holes and onto the top surface of the flange on either side of each hole of the plurality of holes, forming a continuous bond on the entire top surface along and extending to the circumference of the flange, a central portion disposed within the stepped portion of each channel, forming a horizontal bond, and a bottom portion that extends through the annular recess forming a sealing surface adapted for sealing engagement with a seating surface of the seat, wherein the continuous and horizontal bonds of the sealing member provide an increased strength of the valve plug, allowing for increased durability in severe applications, and wherein the cylindrical body is fixed to a mounting member such that the top portion of the sealing member contacts the mounting member.