Patent attributes
A flow control apparatus for use with a fluid valve includes a plug having a first portion slidably coupled to a second portion. The first and second portions include opposing bleed ports. The second portion contacts a seat of the fluid valve to close the fluid valve. The apparatus further includes a cavity formed in an outer circumferential surface of the plug by the first and second portions. An axial dimension of the cavity decreases when the first portion slides toward the second portion. The decrease radially outwardly displaces a seal disposed in the cavity. The seal has a 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 seat. The apparatus further includes a pin disposed in the opposing bleed ports to align the first and second portions relative to a common longitudinal axis.
