The invention relates to a mechanical energized sealing ball valve comprising a seat, a ball assembly, and a valve stem. The ball comprises a ball and a sealing member. The valve stem drives the ball to rotate between open position and close position. When the ball reaches the close position, the sealing member jacks up from the ball to press and sit against the seat. The invention has the advantages that: the valve has a compact structure, the friction-free on/off is achieved, the mechanical energized sealing force is even and reliable, the ball is retracted and locked in the opening position to protect against turbulence-induced damage, low operating torque, the open/close operation is rapid, and the valve stem seal operates simply and reliably.

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.

The disclosed embodiments include ball valves having integrated seats. The integrated seats are included in a ball body assembly of a valve body. The ball body assembly may rotate with respect to the valve body to open or close the valve. The integrated seats may contact walls of a bore to sealingly close the valve.

An adjustable trunnion valve includes an obturator, a valve stem, at least one valve seal, and a trunnion. The trunnion and obturator are configured to translate the obturator along a longitudinal axis extending through the trunnion and the obturator upon rotation of the valve stem beyond one or both of its open position and its closed position. A method of operating an adjustable trunnion valve having an obturator coupled to a trunnion and a valve stem includes passing a fluid through the adjustable trunnion valve and rotating the valve stem to rotate the obturator about an axis of rotation and to simultaneously translate the obturator in a direction along the axis of rotation while the obturator is supported by the trunnion and while the fluid flows through the adjustable trunnion valve.

A seal assembly is provided for a rotary ball valve an eccentric cammed ball. The seal assembly may include a seal ring disposed within the valve interior and biased toward the ball element of the valve. A seal ring retainer may be threadedly secured to an interior of the valve body, thereby retaining the seal ring in the valve body.

The disclosed embodiments include ball valves having integrated seats. The integrated seats are included in a ball body assembly of a valve body. The ball body assembly may rotate with respect to the valve body to open or close the valve. The integrated seats may contact walls of a bore to sealingly close the valve.

A ball valve assembly includes a ball configured to rotate between an open position and a closed position. The ball valve assembly also includes an annular seat configured to engage the ball and a rotatable ring having a first engagement feature. In addition, the ball valve assembly includes a non-rotatable ring positioned adjacent to the rotatable ring. The ball valve assembly also includes a drive plate non-rotatably coupled to the ball. The drive plate includes a second engagement feature, and the second engagement feature is configured to engage the first engagement feature to drive the rotatable ring to rotate in response to rotation of the drive plate. Furthermore, the ball valve assembly includes a bearing element configured to drive the rotatable ring and the non-rotatable ring away from one another to compress the annular seat against the ball in response to rotation of the rotatable ring.

Provided are a three-way valve for flow rate control and a temperature control device, which have improved sealing performance against a fluid having a low temperature of about 85 C. as compared to a case in which a pressure applying portion does not include a communication member having a cylindrical shape with both end portions in a longitudinal direction sealed by sealing means including a coating member, which has a substantially U-shaped cross section and is made of a synthetic resin, and is urged in an opening direction by a spring member made of a metal. The pressure applying portion includes the communication member having a cylindrical shape, which allows inner surfaces of first and second valve port forming members and first and second outflow ports to communicate with each other, and in which both end portions in the longitudinal direction are each sealed by the sealing means including the coating member, which has a substantially U-shaped cross section and is made of a synthetic resin, and is urged in the opening direction by the spring member made of a metal.

The present disclosure provides a valve device having a housing and a valve core. The housing internally is provided with at least two fluid passages and sealing members located at a port of each fluid passage. The valve core is disposed in the housing and comprises at least one closing wall. The valve core is configured to be capable of rotating around an axis in a first direction in the housing to enable the closing wall to align with the corresponding fluid passage to close the aligned fluid passage. The valve core is configured to be capable of making a linear motion in a second direction in the housing to allow the closing wall to tightly abut against the sealing member at the closed fluid passage. The second direction forms an angle with an imaginary bisecting plane of the closing wall of the valve core, the angle is an acute angle. When the closing wall is aligned with the fluid passage, the imaginary bisecting plane of the closing wall is parallel to the extending direction of the part of the fluid passage near a center of the housing. In the valve device of the present disclosure, the valve core can smoothly rotate between valve core positions.