Valve stem and valve plug apparatus for use with fluid regulators
AssigneeEmerson Process Management Regulator Technologies, Inc.
InventorGregg Alan Schneider
Life of this patent
Estimating the term…
Abstract
Valve stem and valve plug apparatus for use with fluid regulators are described herein. An example fluid regulator includes a flow control member having a body that includes a longitudinal bore between a first end and a second end and a valve stem is disposed in the bore of the flow control member. A connector slidably couples the valve stem and the flow control member such that the connector moves away from the flow control member to relieve the flow control member of a loading force imparted by a loading element of the fluid regulator when the flow control member sealingly engages a valve seat of the fluid regulator.
Claims20
A fluid regulator comprising:
- means for regulating a fluid pressure at an inlet of the fluid regulator relative to a pressure set-point provided by means for loading the fluid regulator;
- means for actuating the means for regulating, the means for actuating having means for sensing that defines a loading chamber and a sensing chamber, the loading chamber to receive the means for loading and the sensing chamber to sense the fluid pressure at an inlet of the fluid regulator;
- means for operatively decoupling a force imparted to the means for regulating by the means for loading when the fluid pressure at the inlet is less than the pressure set-point provided by the means for loading and the means for regulating is in a closed position to prevent or restrict fluid flow through the fluid regulator;
- and
- means for providing a seat load to the means for regulating when the means for regulating is in the closed position.
A fluid regulator, comprising:
- an actuator having a loading chamber and a sensing chamber opposite the loading chamber, the loading chamber to receive a loading element and the sensing chamber to sense a pressure of a fluid at an inlet of the fluid regulator;
- a flow control member having a body that includes a longitudinal bore between a first end and a second end;
- a valve stem disposed in the bore of the flow control member to couple the flow control member and the actuator;
- and
- a connector to slidably couple the valve stem and the flow control member, the connector to move away from the flow control member to operatively decouple the flow control member from a loading force imparted by the loading element of the fluid regulator when the flow control member engages a valve seat of the fluid regulator.
A fluid regulator comprising:
- an actuator having a sensor that defines a loading chamber and a sensing chamber opposite the loading chamber, the loading chamber to receive a loading element and the sensing chamber to sense a pressure of a fluid at an inlet of the fluid regulator;
- a plug having a bore therethrough;
- a stem to couple the plug to the sensor, the stem slidably coupled to the plug via the bore to allow the stem to move through the bore when the plug is engaged with a seat of the fluid regulator, the stem having a head to disengage from the plug when the plug is in engagement with the seat to operatively decouple the plug from a loading force imparted by the loading element, the head to engage the plug to move the plug away from the seat;
- and
- a spring coupled to the plug to hold the plug in sealing engagement with the seat when the head is disengaged from the plug.
Dependencies are inferred from the claim text.