Self aligning valve plug

摘要

A balanced pressure regulator includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. A valve seat is disposed within the fluid passageway. A self-aligning valve plug is at least partially disposed within the fluid passageway, the self-aligning valve plug interacting with the valve seat to selectively open or close the fluid passageway. A retainer is partially disposed within a bore of the self-aligning valve plug and operatively connects the self-aligning valve plug to a valve stem having a ball portion. More specifically, the retainer includes a recess adapted to receive the ball portion of the valve stem, such that the self-aligning valve plug automatically rotates around the ball portion of the valve stem to achieve alignment and sealing engagement between a valve disc of the self-aligning valve plug and the valve seat.

主权项

1. A balanced pressure regulator, comprising:
a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway; a valve seat disposed within the fluid passageway; a self-aligning valve plug at least partially disposed within the fluid passageway, the self-aligning valve plug including a bore and interacting with the valve seat to selectively open or close the fluid passageway; a retainer partially disposed within the bore of the self-aligning valve plug and operatively connecting the self-aligning valve plug to a valve stem having a ball portion, the retainer having a recess for receiving the ball portion of the valve stem, wherein the retainer includes a base and a cylindrical body attached to the base via a fastener, and the cylindrical body includes a flange extending radially from an end of the cylindrical body disposed opposite the base; and a balancing passage that fluidly connects the fluid passageway with a chamber; wherein, the self-aligning valve plug automatically rotates around the ball portion of the valve stem to achieve alignment and sealing engagement between a valve disc of the self-aligning valve plug and the valve seat.