Abstract: A parallel slide gate valve includes a valve body comprising an interior surface, and an obturator therein. A portion of the interior surface defines a groove having a longitudinal axis oriented substantially perpendicular to a direction of flow through the valve body. The groove has a first width at a first end proximate to the fluid flow path and a second width at a second end distal from the fluid flow path, the second width smaller than the first width. The obturator is at least partially within the at least one groove. The obturator is configured to translate from the first end of the at least one groove toward the second end of the at least one groove as the obturator moves from a closed position to an open position.

Abstract: A method and apparatus for sealing an opening of a processing chamber are provided. In one embodiment, the invention generally provides a closure member integrated within a wall of a process chamber for sealing an opening within the wall of the chamber. In another embodiment, the invention provides a closure member configured to seal an opening in the wall of a processing chamber from the inside of the chamber.

Abstract: A vacuum valve comprises a valve housing which has an inlet opening and an outlet opening penetrating opposite walls of the valve housing, a valve seat surrounding the inlet opening, and a closure unit which is arranged in an interior space of the valve housing and which has a valve plate which is adjustable between an open position in which it releases the inlet opening, an intermediate position in which it covers the inlet opening but is lifted from the valve seat, and a closed position in which it covers the inlet opening and is pressed against the valve seat, and at least one adjusting piston which is arranged in an interior space of the closure unit and, for the purpose of adjusting the valve plate between its intermediate position and its closed position, is displaceable in direction of its longitudinal center axis between a passive position in which the valve plate is in its intermediate position and an active position in which the valve plate is in its closed position.

Abstract: A valve device is provided. The valve device of the present invention includes a planetary component and two valve plates. The two valve plates are disposed on a hole portion of the planetary component opposite to each other, so as to provide a quick opening and closing with a relatively high opening and closing speed, and to reduce the space occupied. Therefore, the provided valve device does not need to perform adjustment (processing) to reduce the operating force on the sluice valve or to assure the closing function of the valve. Further, the function and the producibility of the valve are improved significantly.

Abstract: In one embodiment, a slit valve is provided that is adapted to seal an opening and that includes a valve housing having a first wall, a first opening formed in the first wall, a second wall and a second opening formed in the second wall. The slit valve also includes a closure member having a sealing portion adapted to contact the second wall and seal the second opening, and a bracing member moveable relative to the sealing portion and adapted to contact the first wall. The slit valve further includes at least one actuating mechanism adapted to (1) move the sealing portion toward the second wall and into contact with the second wall; and (2) move the bracing member away from the sealing portion and into contact with the first wall so as to brace the sealing portion against the second wall. Numerous other aspects are provided.

Abstract: A fool proof slide gate valve wherein a slide gate valve body houses a gate which is constructed to encompass a wedge and its related components whereby when an external force is transmitted to said wedge, the gate effectively opens flow or closes flow to a medium flowing through a conduit connected to said fool proof slide gate valve, during which time of operation the gate remains sealed at all times preventing exposure of the component parts to the medium flowing through the conduit and other environmental matter and debris.

Abstract: A slide valve includes a valve housing and a valve closure control device which is laterally movable within the valve housing, the valve housing including two parallel flange members which have openings therein and seating surfaces on the facing sides thereof and the valve closure control device including a frame, two parallel shut-off plates mounted on the frame, the shut-off plates having triangularly-arranged cam projections on the facing sides thereof, and two shafts mounted on the frame between the shut-off plates, each shaft mounting three roll bodies for cooperation with two associated cam projections on one shut-off plate and a cam projection on the other shut off plate to move the plates apart and against the seating surfaces on the flange members when the valve closure control device is fully inserted within the valve housing and thus at its closure position therewithin.

Abstract: An improved through conduit gate valve having a double expanding gate assembly with floating seats. The gate assembly carries at its edges flat guide strips which are slightly thicker than the collapsed thickness of the gate. These strips engage the seals to keep them from blinding or back wedging the gate assembly during movement between its opened and closed positions. Elastic suspension elements mount the strips to the gate assembly for proper wedging action by expansion against the seals but insures return into the collapsed position during the mentioned movement.

Abstract: A valve structure permitting two vacuum chambers (16, 20) to be separted or joined without breaking the vacuum in either. The structure includes first and second valves (10, 12) positioned at openings in the vacuum chambers, a valve housing 30 surrounding the valves and able to be sealed to form a valve lock chamber (32), and a pair of valve actuators (34, 36). Each valve includes a pair of plates movable together to an intermediate position over the opening, and then movable away from each other in response to further actuator movement, to seal one of the plates over the opening. In one disclosed embodiment the plates are moved apart by a pair of parallel pivot links, and in another embodiment a pair of balls is used to effect the required sealing movement.

Abstract: A gate valve comprising a valve body having oppositely disposed inlet and outlet ports, a valve closure member reciprocally disposed within the valve body and interposed between the inlet and outlet ports to provide alternate open and closed positions for the valve, a valve seat provided in the valve body and disposed on the upstream side of the closure member for sealing of the valve in the closed position thereof.

Abstract: A new and improved gate valve suitable for use with high pressure, high temperature fluids such as those developed in coal gasification processes and the like which comprises a valve gate assembly including opposed outwardly facing valve discs is bodily movable from a valve open position to a valve seat confronting position in which the valve discs are aligned with but spaced from opposed valve seats in the flow passage. Upon further downward movement of the valve stem the valve discs are moved laterally outwardly into engagement with the valve seats. In order to accommodate situations where the opposed valve seats are spaced relatively close together, the valve discs are mounted on annular spring washers which normally bias said valve discs away from said valve seats. A pair of toggle elements are actuated by downward movement of the valve stem to force the valve discs laterally outwardly into engagement with the valve seats after the assembly has been moved to the valve seat confronting position.

Abstract: The gate assembly (24) of an expanding gate valve has projecting pins (74, 76, 78) which engage guide surfaces (54, 66) of guide rails (52, 64) in order to maintain the gate assembly in a collapsed condition between its open and closed positions. At the fully open and fully closed positions, the pins register with gaps (56, 58, 60, 68, 70) in the guide surfaces to permit expansion of the gate assembly against a pair of valve seats (20, 22).

Abstract: There is disclosed a valve having an expanded gate comprising a pair of ported segments each having "V"-shaped, oppositely facing inner surfaces which are yieldably urged into conformity with one another by a pair of leaf springs. Each leaf spring is disposed about a pin on one side of a first segment intermediate its ends, and has one of its ends anchored to the first segment, and the other end anchored to the second segment.

Abstract: An improved gate valve of the expanding type wherein a gate and segment assembly having cooperative wedge surfaces are moved linearly between a pair of valve seats to block the flow therebetween in one position and open the flow in another, the fluid flowing through aligned ports in the gate and segment in such open position. The improvement lies in substituting for prior art springs a guide rail (28, 28') fixed to the valve housing or body and extending parallel to the stroke of the movable members, together with a rocker arm (54) pivotally mounted on one member and having a slot (66) receiving a pin (58) out of the other. A pair of lobes (64) extend from the opposed ends of the rocker arm (54) and contact the guide member. When the gate and segment assembly are at any position between the ends of its stroke, the rocker arm keeps both pairs of wedge surfaces tightly in contact, preventing any expansion.

Abstract: A linear retractable seal valve having a wedge sealing-slip assembly slideably held at opposite side edges of the wedge to guide rails of the valve body and moveable from a distant first location to a second location between inlet and outlet ports of the valve from which latter location the sealing slips are wedged outwardly of the longitudinal movement of the assembly into closure engagement with the valve ports, with the valve being returned to its open position through a reverse sequential movement wherein there is first a perpendicular movement of the slips out of closure engagement with the valve ports, following which there is a reverse longitudinal movement of the wedge-slip assembly away from the fluid passageway to its valve open first location.

Abstract: A linear retractable seal valve having an inlet and outlet port and a fluid passageway therebetween with a lateral passageway perpendicular to the fluid passageway and with a wedge sealing-slip assembly slideably held at opposite side edges of the wedge to two guide rails of the valve body and moveable from a distant valve open first location within the lateral passageway to a second location between inlet and outlet ports of the valve. The slip-wedge assembly has at least one closure slip with an inside face of the slip slideably engaging a tapering face of the wedge and with the slip at said second location being restrained from further longitudinal movement and moveable in a perpendicular direction of the longitudinal assembly movement into closure engagement with one of the valve ports. The guide rails are diametrically-opposed and extend longitudinally of the inside face of the lateral passageway into the fluid passageway.

Abstract: A valve having a body with a valve seat and valve element and actuating means for moving the valve element toward and away from the valve seat with stop means in the body for stopping the movement of the valve element when the element is positioned against the valve seat. Fluid-actuated seal means are provided for sealing between the valve seat and the valve element and fluid-actuation means including a piston and cylinder which are in fluid communication with the seal means for actuation of the seal means. The fluid-actuation means are connected to the valve-actuating means whereby the seal means are pressurized and relieved by movement of the valve-actuating means.