Mechanism and Method to Adjust Size of Balanced Valve

摘要

A balanced valve trim, a regulator valve with a balanced valve trim, and methods for modifying a regulator valve with a balanced valve trim assembly to accommodate different volume flow rates through the regulator valve are disclosed.

主权项

1. A regulator valve, comprising:
a valve body defining a fluid flow passage having a valve throat disposed between an inlet and an outlet; an actuator operatively coupled to the valve body; and a balanced valve trim comprising: a seat ring coupled to the valve body, the seat ring defining a flow through orifice having a first cross-sectional area; and a flow control member, the flow control member including a sleeve operatively connected to the actuator so as to move a valve disk assembly toward and away from the seat ring so as to control flow of fluid through the fluid flow passage, the sleeve having an interior space disposed between a first end of the sleeve and a second end of the sleeve, the valve disk assembly disposed at the second end of the sleeve, an inner annular shoulder disposed toward the first end of the sleeve and spaced apart from the valve disk assembly to at least partially define the interior space, and a through bore extending through the inner annular shoulder, wherein the valve disk assembly includes a passageway to provide fluid communication between the fluid flow passage and the interior space; and a plunger slidingly disposed within the through bore and fixed relative to the valve body.