A valve arrangement for a steam turbine, wherein, for regulating a fluid flow, the valve arrangement has a hollow cylindrical valve body, which cooperates with a corresponding valve seat. The valve body has a linear contact edge and has multiple compensating bores for pressure equalization. The valve body is moved electromechanically via a coupling element into a stationary element. In addition, the valve arrangement has a housing having a curvature, which extends in the direction of the valve body.

There is provided a valve apparatus comprising a body including an inlet, an outlet, and a fluid passage extending from the inlet to the outlet, a closure member displaceable, relative to the fluid passage, from a closed position to an open position for effecting fluid communication between the inlet and the outlet, a retainer for retaining the closure member in the closed position, and an actuator including a stimulus responder for receiving a predetermined stimulus and effecting release of the closure member from retention by the retainer in response to the receiving of a predetermined stimulus. The closure member, the retainer, and the stimulus responder are co-operatively configured such that: while there is an absence of receiving of a predetermined stimulus by the stimulus responder, the closure member is retained by the retainer in the closed position, and while the closure member is being retained by the retainer, in response to receiving of a predetermined stimulus by the stimulus responder, the closure member becomes released from the retention by the retainer.

There is provided a valve apparatus comprising a body including an inlet, an outlet, and a fluid passage extending from the inlet to the outlet, a closure member displaceable, relative to the fluid passage, from a closed position to an open position for effecting fluid communication between the inlet and the outlet, a retainer for retaining the closure member in the closed position, and an actuator including a stimulus responder for receiving a predetermined stimulus and effecting release of the closure member from retention by the retainer in response to the receiving of a predetermined stimulus. The closure member, the retainer, and the stimulus responder are co-operatively configured such that: while there is an absence of receiving of a predetermined stimulus by the stimulus responder, the closure member is retained by the retainer in the closed position, and while the closure member is being retained by the retainer, in response to receiving of a predetermined stimulus by the stimulus responder, the closure member becomes released from the retention by the retainer.

An apparatus for locking a sealing member of a valve in a piping system or an enclosed system comprises: (a) a locking mechanism housing having a upper end, a lower end opposed to the upper end, and a body between the upper end and the lower end; (b) at least a locking mechanism opening formed on the body; (c) at least a locking mechanism disposed in the locking mechanism opening; wherein the valve further comprises a valve housing and a sealing member; wherein the locking mechanism housing, the at least a locking mechanism opening, at least a locking mechanism, and the sealing member is disposed inside the valve housing; wherein a first pressure exists in the upper end of the locking mechanism housing; and wherein a second pressure exists in the lower end of the locking mechanism housing.

An apparatus for locking a sealing member of a valve in a piping system or an enclosed system comprises: (a) a locking mechanism housing having a upper end, a lower end opposed to the upper end, and a body between the upper end and the lower end; (b) at least a locking mechanism opening formed on the body; (c) at least a locking mechanism disposed in the locking mechanism opening; wherein the valve further comprises a valve housing and a sealing member; wherein the locking mechanism housing, the at least a locking mechanism opening, at least a locking mechanism, and the sealing member is disposed inside the valve housing; wherein a first pressure exists in the upper end of the locking mechanism housing; and wherein a second pressure exists in the lower end of the locking mechanism housing.

A gate valve has a communication block with a communication passage and a valve unit having a valve plate movable between a partitioning position and an open position. A lower end part of the valve plate comes into pressurized contact with a surface of a band-shaped base material transferred through the communication passage between a first chamber and a second chamber. Due to a force of this pressurized contact, a back surface of the base material is seated on a seating surface provided in the communication passage. A groove is formed in the lower end of the valve plate, and a roller-shaped sealing member with a central shaft is inserted into the groove. Opening parts are formed in both axial side-wall surfaces of the groove such that the end parts of the central shaft of the sealing member are inserted into the opening parts and pivotally supported with a clearance.

A gate valve has a communication block with a communication passage and a valve unit having a valve plate movable between a partitioning position and an open position. A lower end part of the valve plate comes into pressurized contact with a surface of a band-shaped base material transferred through the communication passage between a first chamber and a second chamber. Due to a force of this pressurized contact, a back surface of the base material is seated on a seating surface provided in the communication passage. A groove is formed in the lower end of the valve plate, and a roller-shaped sealing member with a central shaft is inserted into the groove. Opening parts are formed in both axial side-wall surfaces of the groove such that the end parts of the central shaft of the sealing member are inserted into the opening parts and pivotally supported with a clearance.

A gate valve has a communication block with a communication passage and a valve unit having a valve plate movable between a partitioning position and an open position. A lower end part of the valve plate comes into pressurized contact with a surface of a band-shaped base material transferred through the communication passage between a first chamber and a second chamber. Due to a force of this pressurized contact, a back surface of the base material is seated on a seating surface provided in the communication passage. A groove is formed in the lower end of the valve plate, and a roller-shaped sealing member with a central shaft is inserted into the groove. Opening parts are formed in both axial side-wall surfaces of the groove such that the end parts of the central shaft of the sealing member are inserted into the opening parts and pivotally supported with a clearance.

A gate valve has a communication block with a communication passage and a valve unit having a valve plate movable between a partitioning position and an open position. A lower end part of the valve plate comes into pressurized contact with a surface of a band-shaped base material transferred through the communication passage between a first chamber and a second chamber. Due to a force of this pressurized contact, a back surface of the base material is seated on a seating surface provided in the communication passage. A groove is formed in the lower end of the valve plate, and a roller-shaped sealing member with a central shaft is inserted into the groove. Opening parts are formed in both axial side-wall surfaces of the groove such that the end parts of the central shaft of the sealing member are inserted into the opening parts and pivotally supported with a clearance.

A solenoid-actuated valve includes a solenoid portion extending along a longitudinal axis. The solenoid portion includes a solenoid housing defining a solenoid interior, a coil, and an armature, with the armature being moveable along the longitudinal axis in response to energization of the coil. The solenoid-actuated valve also includes a valve portion coupled to the solenoid portion. The valve portion includes a valve member moveable by the armature. The solenoid-actuated valve further includes a valve filter disposed in the solenoid interior and/or coupled to the solenoid housing and configured to separate the solenoid interior from a hydraulic circuit when the valve portion is coupled to a valve housing for allowing fluid to flow into and out of the solenoid interior upon actuation of the armature.