×

Fluid flow control apparatus for use with fluid valves

  • US 10,400,899 B2
  • Filed: 07/24/2017
  • Issued: 09/03/2019
  • Est. Priority Date: 07/24/2017
  • Status: Active Grant
First Claim
Patent Images

1. An apparatus comprising:

  • a plug for a sliding stem fluid valve, the plug having a first portion slidably coupled to a second portion, the second portion to contact a first seat of the fluid valve to close the fluid valve;

    a cavity formed in an outer circumferential surface of the plug by the first portion and the second portion, an axial dimension of the cavity to decrease when the first portion slides toward the second portion, the decrease to radially outwardly displace a seal disposed in the cavity, the seal having a flat inner surface and a curved outer surface located opposite the flat inner surface, the flat inner surface engaging the second portion, the curved outer surface configured to engage an inner circumferential wall of a cage of the fluid valve in response to the second portion contacting the first seat; and

    a second seat disposed in the cavity between the seal and the first portion or the second portion, the second seat having a curved surface configured to engage the outer curved surface of the seal as the first portion slides toward the second portion to assist in radially outwardly displacing the seal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×