DEVICE FOR SEALING A VALVE

摘要

Embodiments of a seal element for use in a trim assembly that allow valves and, in particular, balance control valves to meet high-temperature and shut-off requirements. These embodiments can engage and disengage a cage element and a plug element of the trim assembly, thereby creating a seal that prevents leaks of working fluid that can compromise operation of the valve. In one embodiment, the seal element comprises an annular ring that circumscribes the outer periphery of the plug element. The annular ring can deflect in response movement of one part of the plug element relative to another part of the plug element. This deflection can cause the seal element to contact the cage element and the plug element in seal regions that are proximate to one another, and to the outer periphery of the plug element.

主权项

1. A valve, comprising:
a cage element with an inner wall; a plug element disposed in the cage element, the plug element having a center axis, an outer peripheral surface proximate the inner wall, and a seal feature with a sealing surface forming a peripheral edge with the outer peripheral surface; and a seal element disposed in the seal feature, the seal element having a first seal surface proximate the sealing surface and a second seal surface proximate the inner wall of the cage element, wherein the seal element has deflected position in which the first seal surface contacts the sealing surface of the seal feature in a seal region that is proximate the outer peripheral edge.