Pressure regulators with adjustable boost bodies

A pressure regulator comprising:

• a valve body defining a fluid passageway between an inlet and an outlet;
• a seat in the fluid passageway;
• an actuator casing coupled to the valve body, the actuator casing defining a pressure sense chamber and a channel between the pressure sense chamber and the fluid passageway in the valve body;
• and
• a plug assembly including:
• a stem;
• a plug coupled to the stem;
• a stem guide disposed in the channel of the actuator casing, the stem moveable in the stem guide to move the plug relative to the seat, the stem guide having a first side facing the pressure sense chamber and a second side facing the fluid passageway, the stem guide having a flange with four notches;
• a boost body on the second side of the stem guide;
• and
• a tube extending through the boost body, the tube having a first end and a second end, the first end aligned with the notch and the second end disposed in a downstream location relative to the seat such that the pressure sense chamber is in fluid communication with the downstream location, wherein the boost body is rotatable with respect to the stem guide to position the tube in at least one other orientation relative to the actuator casing, and wherein the boost body can be rotated to four positions to align the first end of the tube with a corresponding one of the notches.

A pressure regulator comprising:

• a valve body defining a fluid passageway between an inlet and an outlet;
• a seat in the fluid passageway;
• an actuator casing coupled to the valve body, the actuator casing defining a pressure sense chamber and a channel between the pressure sense chamber and the fluid passageway in the valve body;
• and
• a plug assembly including:
• a stem;
• a plug coupled to the stem;
• a stem guide disposed in the channel of the actuator casing, the stem moveable in the stem guide to move the plug relative to the seat, the stem guide having a first side facing the pressure sense chamber and a second side facing the fluid passageway, the stem guide having a flange with a notch;
• a boost body on the second side of the stem guide;
• a spring to bias the boost body toward the stem guide, wherein the spring is between the boost body and the plug;
• and
• a tube extending through the boost body, the tube having a first end and a second end, the first end aligned with the notch and the second end disposed in a downstream location relative to the seat such that the pressure sense chamber is in fluid communication with the downstream location, wherein the boost body is rotatable with respect to the stem guide to position the tube in at least one other orientation relative to the actuator casing.

A pressure regulator comprising:

• a valve body defining a fluid passageway between an inlet and an outlet;
• a seat in the fluid passageway;
• an actuator casing coupled to the valve body, the actuator casing defining a pressure sense chamber and a channel between the pressure sense chamber and the fluid passageway in the valve body;
• and
• a plug assembly including:
• a stem;
• a plug coupled to the stem;
• a stem guide disposed in the channel of the actuator casing, the stem moveable in the stem guide to move the plug relative to the seat, the stem guide having a first side facing the pressure sense chamber and a second side facing the fluid passageway, the stem guide having a flange with a notch;
• a boost body on the second side of the stem guide;
• and
• a tube extending through a channel in the boost body, the tube coupled to the boost body by a retaining pin, the retaining pin is inserted into a bore that extends into a peripheral edge of the boost body, the bore partially intersecting the channel, wherein the retaining pin partially flattens a portion of the tube, wherein the tube has a first end and a second end, the first end aligned with the notch and the second end disposed in a downstream location relative to the seat such that the pressure sense chamber is in fluid communication with the downstream location, and wherein the boost body is rotatable with respect to the stem guide to position the tube in at least one other orientation relative to the actuator casing.

A pressure regulator comprising:

• a valve body defining a fluid passageway between an inlet and an outlet;
• a seat in the fluid passageway;
• an actuator casing coupled to the valve body, the actuator casing defining a pressure sense chamber and a channel between the pressure sense chamber and the fluid passageway in the valve body;
• and
• a plug assembly including:
• a stem;
• a plug coupled to the stem;
• a stem guide disposed in the channel of the actuator casing, the stem moveable in the stem guide to move the plug relative to the seat, the stem guide having a first side facing the pressure sense chamber and a second side facing the fluid passageway, the stem guide having a first flange with a first notch, the stem guide having a second flange spaced from the first flange, the second flange engaged with an inner surface of the channel, the second flange having a second notch to enable fluid flow across the second flange;
• a boost body on the second side of the stem guide;
• and
• a tube extending through the boost body, the tube having a first end and a second end, the first end aligned with the first notch and the second end disposed in a downstream location relative to the seat such that the pressure sense chamber is in fluid communication with the downstream location, wherein the boost body is rotatable with respect to the stem guide to position the tube in at least one other orientation relative to the actuator casing.

A plug assembly for a pressure regulator, the plug assembly comprising:

• a stem;
• a plug coupled to the stem, the plug to be moved relative to a seat in the pressure regulator to control a flow of fluid through the seat;
• a stem guide to be disposed in the pressure regulator between a fluid passageway and a pressure sense chamber, the stem guide having a first side to face the pressure sense chamber and a second side to face the fluid passageway, the stem guide having a flange with notches;
• a boost body on the second side of the stem guide;
• and
• a tube coupled to and extending through the boost body and into a first one of the notches, the boost body being moveable away from the second side of the stem guide and rotatable relative to the stem guide to position the tube in another one of the notches.