Abstract: Heat tracing systems and related methods are disclosed. An example valve includes a valve body defining a fluid flow passageway between a primary inlet and a primary outlet. The body valve has a first face adjacent the main inlet, the first face including a first groove. A first cover is positioned over the first groove to define a first heat tracing path. A secondary inlet is formed in the valve body and fluidly coupled to the first heat tracing path. A secondary outlet formed in the valve body and fluidly coupled to the first heat tracing path.

Abstract: Control valves and cages that are adapted to reduce flashing and cavitation. A cage for use with a control valve having an inlet, an outlet, and defining a flow passage between the inlet and the outlet. The cage includes a generally cylindrical body and having a central bore, an upper portion, and a lower portion and an inner wall, an outer wall, and an intermediate wall disposed between the inner wall and the outer wall. The inner wall includes an inlet opening and the outer wall including an outlet opening. The inner wall, the outer wall, and the intermediate wall cooperate to define a portion of the flow passage that extends from the inlet opening, through the cage along the inner wall, along the intermediate wall, past a terminal portion of the intermediate wall, along the outer wall, to the outlet opening.

Abstract: Example multiple stage anti-surge valves are disclosed. In some examples, an apparatus includes a cage having a first section adjacent the valve seat with a first fluid flow passage, a second section spaced from the first section along a longitudinal axis of the cage with a second fluid flow passage, and a third section devoid of a fluid flow passage between the first and second sections. The example apparatus includes a plug slidably disposed in the cage, the plug having a third fluid flow passage through a skirt of the plug, the third fluid flow passage to be fluidly coupled to the second fluid flow passage during a stroke of the plug.

Abstract: A valve plug assembly includes a plug base, a first end of the base arranged for attachment to a valve stem, a second end of the plug base including a bore having a first portion and a second portion. The second portion of the bore is a conical terminus forming a first seat. A spacer has a through bore, a first end, and a second end, and is sized for insertion in the bore of the plug base and has a conical shape to engage the first seat, and the spacer also forms a second seat. A plug tip has a through bore and a conical end engaging the second seat and is arranged to engage the valve seat, and a cap screw extends through the plug tip and the spacer to mechanically secure the plug tip to the plug base.

Abstract: A fluid control valve having a body, a seat ring, a valve cage adjacent the seat ring, a first valve plug assembly positioned within the valve cage, and a second valve plug assembly positioned within an axial bore of the first valve plug assembly. The first valve plug assembly has radial apertures in fluid communication with the axial bore and a first valve plug including the axial bore and a throttling port in fluid communication with the axial bore. The first valve plug assembly is movable between a closed position, in engagement with the seat ring, and an open position, spaced apart from the seat ring. The second valve plug assembly has a second valve plug that is movable between a closed position, in engagement with the first valve plug, and an open position, spaced apart from the first valve plug.

Abstract: A valve plug assembly includes a plug base, a first end of the base arranged for attachment to a valve stem, a second end of the plug base including a bore having a first portion and a second portion. The second portion of the bore is a conical terminus forming a first seat. A spacer has a through bore, a first end, and a second end, and is sized for insertion in the bore of the plug base and has a conical shape to engage the first seat, and the spacer also forms a second seat. A plug tip has a through bore and a conical end engaging the second seat and is arranged to engage the valve seat, and a cap screw extends through the plug tip and the spacer to mechanically secure the plug tip to the plug base.

Abstract: A flow control valve includes an inlet, an outlet, and defines a fluid flow path. A valve seat is disposed within a valve body, and a valve plug in the valve body is surrounded by a cage. An exterior surface of the valve plug includes a plurality of notch sets, each notch set spaced apart from an adjacent notch set along the longitudinal axis, and the cage is disposed within the valve body and arranged to retain the valve seat, with an interior of the cage including a plurality of annular recesses. The annular recesses are spaced apart along the longitudinal axis, and the cage includes a plurality of apertures forming a portion of the fluid flow path. The notch sets and the recesses are arranged to form a plurality of turns in the fluid flow path when the valve plug is shifted toward the open position.

Abstract: A valve plug assembly includes a support member having a support member body having a first end and a second end. A stem bore adapted to receive a valve stem may extend axially inward from the second end, and a mating protrusion may extend axially outward from the first end. The valve plug assembly also includes a plug tip having a first end and a second end, and a plug surface adapted to engage a valve seat is disposed adjacent to the first end. A mating bore may extend axially inward from the second end, and the mating protrusion may be received into the mating bore such that a threaded portion of the mating protrusion engages a threaded portion of the mating bore. Additionally, an adhesive bonds the threaded portion of the mating protrusion to the threaded portion of the mating bore.

Abstract: A valve trim apparatus comprises a valve seat (216) and a closure member (214) to operatively engage the valve seat (216). One of the closure member (214) and the valve seat (216) includes a plurality of annular ribs (222), and at least one of the valve seat (216) and the closure member (214) defines at least one groove (218) to be positioned between at least two of the annular ribs (222) to receive material from a sealing surface (220) between the closure member (214) and the valve seat (216) when the closure member (214) is sealingly engaged with the valve seat (216).

Abstract: A valve plug assembly includes a support member having a support member body having a first end and a second end. A stem bore adapted to receive a valve stem may extend axially inward from the second end, and a mating protrusion may extend axially outward from the first end. The valve plug assembly also includes a plug tip having a first end and a second end, and a plug surface adapted to engage a valve seat is disposed adjacent to the first end. A mating bore may extend axially inward from the second end, and the mating protrusion may be received into the mating bore such that a threaded portion of the mating protrusion engages a threaded portion of the mating bore. Additionally, an adhesive bonds the threaded portion of the mating protrusion to the threaded portion of the mating bore.

Abstract: A flow control valve includes an inlet, an outlet, and defines a fluid flow path. A valve seat is disposed within a valve body, and a valve plug in the valve body is surrounded by a cage. An exterior surface of the valve plug includes a plurality of notch sets, each notch set spaced apart from an adjacent notch set along the longitudinal axis, and the cage is disposed within the valve body and arranged to retain the valve seat, with an interior of the cage including a plurality of annular recesses. The annular recesses are spaced apart along the longitudinal axis, and the cage includes a plurality of apertures forming a portion of the fluid flow path. The notch sets and the recesses are arranged to form a plurality of turns in the fluid flow path when the valve plug is shifted toward the open position.

Abstract: A valve trim apparatus comprises a valve seat (216) and a closure member (214) to operatively engage the valve seat (216). One of the closure member (214) and the valve seat (216) includes a plurality of annular ribs (222), and at least one of the valve seat (216) and the closure member (214) defines at least one groove (218) to be positioned between at least two of the annular ribs (222) to receive material from a sealing surface (220) between the closure member (214) and the valve seat (216) when the closure member (214) is sealingly engaged with the valve seat (216).

Abstract: A hydraulic actuating device for a sliding stem control valve assembly is mounted between a control valve and an actuator housing. The hydraulic actuating device is connected to one of a control valve stem, an actuator stem, and a stem connector and the hydraulic actuating device moves either the control valve stem, the actuator stem, or the stem connector in response to varying hydraulic pressure within the hydraulic actuating device. The hydraulic actuating device may be used to override an actuator of the sliding stem valve during emergency operations, or to provide a backup actuator in the case of a primary actuator malfunction.