CLOSE ONLY EXPANSIVE GATE VALVE

摘要

A system, including a first flow control element configured to couple to a stem, and a second flow control element coupled to the first flow control element, wherein the first and second flow control elements are configured to expand relative to one another to create a seal in a closed position between a chamber and a flow path in a valve body, and wherein the first and second flow control elements are configured to enable fluid flow between the chamber and the flow path in an open position.

主权项

1. A system, comprising:
a valve, comprising:
a valve body having a chamber and a flow path along a first axis;a stem extending along a second axis; anda flow control assembly coupled to the stem, wherein the stem is configured to selectively move the flow control assembly through the chamber between a closed position and an open position relative to the flow path, and the flow control assembly comprises:a first flow control element; anda second flow control element, wherein the first and second flow control elements are configured to expand relative to one another to create a seal between the chamber and the flow path in the closed position of the flow control assembly, wherein the first and second flow control elements are configured to contract relative to one another to open a gap between the chamber and the flow path in the open position of the flow control assembly.