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.

A seal assembly for use in a fluid valve includes: an actuatable valve body configured to open and close at least one connection of the fluid valve; at least one seal configured to sealingly abut against the valve body at one side of the valve body and to sealingly abut against a valve housing of the fluid valve at another side of the valve body; and at least one elevation from a lateral surface of the valve body integrally formed on the valve body sectionally, the at least one elevation being configured to activate the seal in a closed position of the fluid valve.

This invention relates to a valve comprising: a body with a first port, a second port and an interior space extending between the first and second port; a seat arranged in the interior space; a valve member moveably arranged inside the interior space to cooperate with the seat; anda stem to move the valve member, wherein the stem is rotatable between a first rotational position and a third rotational position with a second rotational position in between the first and third rotational position, wherein in between the first and second rotational position the valve member and the stem are coupled according to a first configuration, and wherein in between the second and third rotational position, the valve member and the stem are coupled according to a second configuration different from the first configuration.

The disclosure relates to a valve seat driven forced seal ball valve including a valve body, a first seat, a ball and a stem. The stem drives the ball to rotate between an open and a closed positions. The stem also drives the first seat towards and away from the ball. When the ball is in closed position, the first seat presses against the ball to achieve a forced seal. The first seat is driven towards and away from the ball by a first seat drive ring. The first seat drive ring is provided with female threads and the first seat is provided with male threads. The first drive ring drives the first seat towards and away from the ball by a screw connection.

A top-entry trunnion ball valve comprising: a housing formed having first and second fluid flow ports, a cavity through which fluid flows when the valve is open and a top opening through which the cavity is accessible; a ball housed in the cavity formed having a through hole for passage of fluid and rotatable between open and closed positions; a cartridge in the cavity sealed to the housing and comprising a seat sealed to the ball; wherein the cartridge and top opening are sized to enable the cartridge to be inserted into and sealed to the housing and removed from the cavity via the top opening.

A firesafe bidirectional floating ball valve comprising: a housing having a cavity and first and second fluid flow ports through which fluid flows selectively in either direction from the first to the second or the second to the first fluid ports when the valve is open; a ball formed having a through hole for passage of fluid housed in the cavity and rotatable to open the valve and allow fluid flow through the fluid ports and cavity and to close the valve and block fluid flow through the fluid ports and cavity; first and second annular seats that hold and seal the ball between them; and an annular ridge coaxial with the first seat and having an end surface spaced from the first seat by a narrow clearance space; wherein with the valve closed net pressure on the ball in a direction from the second fluid flow port to the first fluid flow port operates to displace the ball and apply force to the first annular seat that closes the clearance space.

A ball valve including a valve body having inlet and outlet flow passageways connected by a valve chamber; a ball valve member mounted in the valve chamber for selective rotation between valve open and valve closed positions to control flow through the valve, the ball valve member including at least one pivot pin and a mount for a control arm; and at least one control arm including a slot configured to accept a control arm bushing, the pivot pin, and combinations thereof, wherein the control arm is mounted to the ball valve member, and wherein upon application of an axial load on the control arm to the open or close the ball valve, the axial load on the control arm is transferred to at least one of a control arm bushing, the pivot pin on the ball valve member, and combinations thereof.

An eccentric rotary valve includes valve elements arranged symmetric around the valve shaft axis, and valve element valve seats and valve body valve seats which are elliptic conical surfaces made of metal. Each valve element has an elliptic spherical surface, an elliptic conical surface, or a completely spherical surface to which one of the valve element valve seats is continuously and steplessly connected. The axes of the valve seats are offset from the valve shaft axis in the valve closing direction such that, when the valve shaft is rotated in the valve opening direction, the valve element valve seats instantly separate from the valve body valve seats. Flow regulating plates are disposed in the valve body between the valve elements to ensure smooth flow of fluid. Ribs are disposed on opposite sides of the valve shaft and forwardly, in the valve opening direction, of the respective valve elements.

The present application discloses a valve comprising: a housing; at least one valve body disposed in the housing, the at least one valve body being rotatable in the housing; and at least one sealing element provided between the housing and the at least one valve body; at least one lifting structure configured to move the at least one sealing element upward and downward relative to the housing or the at least one valve body to adjust the relative distance between the at least one sealing element and the housing/the at least one valve body; wherein when the at least one valve body rotates, the at least one sealing element at least partially leaves the housing or the at least one valve body, so that the driving force required to rotate the valve body can be reduced.

A four valve disc frictionless ball valve includes a spherical valve core assembly, wherein the spherical valve core assembly includes a wedge-shaped valve core. A closed-position valve disc is respectively installed on a pair of closed-position wedge-shaped sides. A closed-position guide key is respectively arranged at the middle positions of the pair of closed-position wedge-shaped sides along an axial direction. A closed-position guide groove is arranged on each closed-position valve disc along the axial direction. An open-position valve disc is respectively installed on a pair of open-position wedge-shaped sides. An open-position guide key is respectively arranged at the middle positions of the pair of open-position wedge-shaped sides along the axial direction. An open-position guide groove is arranged on each open-position valve disc along the axial direction.