Abstract:
A valve including a flow control assembly having an adaptive, floating closure member is provided. In one embodiment, a ball valve includes a floating closure member having a shoulder enclosed within a recess of the valve body. The recess is larger than the shoulder of the closure member and allows axial movement of the closure member with respect to the valve body and along a flow path through the valve. Additional valve systems, devices, and methods are also disclosed.
Abstract:
A ball valve comprises a housing, a first seat surface, a second seat surface, wherein the first seat surface and the second seat surface are fixed relative to each other, and a ball rotatably movable within the housing and contacting at least one of the first seat surface and the second seat surface to form a seal within the ball valve; wherein pressure acting in a first direction and in a second direction opposite the first direction increases the contact pressure of the first seat surface and the second seat surface with the ball.
Abstract:
A ball valve includes a valve housing that has a main passage defined therein and a valve assembly that includes a valve body, which is movable within the main passage between open and closed positions, and a valve stem that fixedly engages the valve body. A handle is disposed on the valve housing that is connected to the valve stem and is operable to rotate the valve body between the open and closed positions via the valve stem. A switch is disposed within the housing, which operatively engages the valve assembly and is configured to transmit a signal to an operator's station regarding the position of the valve body.
Abstract:
The disclosed embodiments include systems and methods for energizing a ball valve seat assembly. In particular, the disclosed embodiments are directed toward energizing devices that generate linear or substantially linear energizing forces. In other words, as a seat of the ball valve translates axially with respect to a ball of the ball valve, the resulting energizing force that biases the seat ring back toward the ball is substantially directly proportional to the amount of axial translation. In certain embodiments, the linear energizing device includes an annular cantilevered v-shaped spring having a generally constant cross-sectional profile, including a pair of legs extending from a curved end.
Abstract:
A valve body defines a valve stem opening. A valve stem comprises an enlarged portion greater than the valve stem opening to thereby secure the valve stem within the valve body by limiting radially outward movement of the valve stem with respect to the valve body. A rotary member comprise upper and lower bosses. Upper and lower split trunnions, with split components that can be inserted from opposite sides of the valve body, are used to rotationally support the upper and lower bosses to permit rotation of the rotary member while preventing axial movement of the axial flow path of the valve.
Abstract:
A trunnion-mounted ball valve, comprising a valve body including a central body and two opposite tubular sections, the central body having a body cavity and the tubular sections having respective ducts with a common longitudinal axis (A) and respective inner ends facing said body cavity, a trunnion-mounted ball rotatably connected to the valve body and rotatable about an axis of rotation orthogonal to said longitudinal axis between an open position and a closed position, the ball having a through hole which is aligned to said ducts in the open position and transversal to said ducts in the closed position, a first and a second seat ring each of which has a guide portion slidably engaging a respective tubular section in the direction of said longitudinal axis and a head portion, wherein one of said seat rings has a ball-side seal provided on said head portion, which establishes a sealing contact between the seat ring and the ball along a ball-side sealing diameter, and a body-side seal, provided on said guide portion, which establishes a sealing contact with a respective tubular section on a body-side sealing diameter, wherein the ball-side sealing diameter and the body-side sealing diameter are constant, wherein the ball-side sealing diameter is greater than the body-side sealing diameter.
Abstract:
Embodiments and methods are disclosed herein that relate to a valve assembly. The valve assembly includes a housing having a passage formed therethrough, and a valve ball having a through hole and disposed in the housing, in which the valve ball is rotatable between an open position that has the through hole aligned with the passage and a closed position that has the through hole misaligned with the passage. The valve assembly further includes a seat having a first tapered surface and disposed in the housing adjacent to the valve ball, wherein the seat is biased towards the valve ball, and a seat holder having a second tapered surface and disposed in the housing adjacent to the seat such that the first tapered surface of the seat is disposed adjacent to the second tapered surface of the seat holder.
Abstract:
Fluid circulation valve (10) is provided for use with a well drilling operation, so that a drill joint may be added to or removed from the drill string while continuously circulating fluid into the well. Valve housing (12, 18) has a central flow path therein, a housing side port (87), and upper and lower threaded connectors for engagement with the drill joint and the drill string, respectively. A rotatable ball (30) is positioned within the flow path in the valve housing and a port (87) in the ball is in fluid communication with the housing side port (15) when the ball is closed. A coupling (60) is provided for engaging the valve housing and sealing between an interior of the valve housing and the radially external flow line, which passes fluid into the well when a drill joint is being connecting to the upper end of the valve.
Abstract:
A valve assembly comprising a housing and a valve member mounted within the housing rotatable about an axis and between at least a dispensing position and a further position, for instance a volume selection position during which a material can be withdrawn from a container, and, preferably, a seat for mounting and guiding the valve member within the housing, wherein at least one of said housing, valve member, and seat is made of a synthetic material and the assembly further comprises a spring, which urges at least two of said housing, valve member, and seat together.
Abstract:
A ball valve having improved sealing between the valve member and the valve body is presented. Improved sealing is realized by providing a sealing member that is allowed to float on the outer surface of the valve member in the closed position. By being able to float on the outer surface, the sealing member can compensate for any variations in the valve member as a result of machining tolerances or variations in position of the valve member due to changes in pressure within the valve, thereby providing dynamic sealing The dynamic sealing is also provided by configuring the valve member such that it causes the sealing member to be exposed to a higher biasing force in the closed position than in the open position.