Abstract: A gate valve has a body, the body having a cavity and a flow passage intersecting the cavity. A seat ring is mounted to the body at the intersection of the flow passage and the cavity, the seat ring having an engaging face. A gate in the cavity has an engaging face that slidingly engages the face of the seat ring while being moved between open and closed positions. A friction-resistant coating is on at least one of the faces.

Abstract: A method for controlling or regulating a vacuum valve that includes a valve body (1) with a valve opening (2), a closing member (3), an actuator (5) for moving the closing member (3), and a control device (9) by which the actuator (5) is triggered and by which the pressing force acting on the elastic seal (4) in the closed position of the closing member (3) is set. The setting of the pressing force acting on the elastic seal (4) is performed as a function of at least one parameter that can be input by a user.

Abstract: A high temperature gate valve including a valve body formed to define first and second ports and an exit, each of which has a length-wise dimension greater than a height-wise dimension, and a door, having a length-wise dimension greater than a height-wise dimension, coupled to the valve body to occupy and move between positions at which the door prevents fluid communication between one of the first or the second port and the exit and intermediate positions at which fluid communication between the first and the second port and the exit is permitted.

Abstract: In one embodiment, a gate valve is provided that includes a seal plate disposed in a housing. An inflatable biasing member is retained on a first side of the seal plate and is positioned to surround a first opening formed through the housing. A ring seal is retained on a second side of the plate opposite the first side and is positioned to surround a second opening formed through the housing. At least one of the inflatable biasing member and the ring seal are adapted to create a vacuum seal around the first and second openings, respectively, when the inflatable biasing member is inflated.

Abstract: A method for controlling or regulating a vacuum valve that includes: a valve body (1) with a valve opening (2); a closing member (3) that can be moved between an open position and a closed position over a closing path (s) for closing the vacuum valve and that closes the valve opening (2) in the closed position, in which at least one elastic seal (4) is pressed onto a seal face (35); an actuator (5) for moving the closing member (3); and a control device (9) by which the actuator (5) can be triggered; the point (p) of the closing path (s) at which the elastic seal (4) contacts the seal face (35) and/or a velocity (v) of the closing member (3) at that point is used as a controlling parameter for the control device (9).

Abstract: Agate valve apparatus is disclosed. The gate valve apparatus is provided with a valve casing that includes a first valve seat and a second valve seat, and in which an opening portion is formed; and a closure element that includes a sealing member that contacts the first valve seat to seal the opening portion. In addition, the gate valve apparatus is provided with a shutoff member that contacts the second valve seat to thereby be deformed, so that a space between the opening portion and a sealing member is shut off by the shutoff member when the closure element closes the opening portion. The shutoff member is deformed and continues to contact the second valve seat under normal and high temperature environments when the closure element closes the opening portion.

Abstract: A valve system comprising a closure member that is linearly translatable within a valve body. A fail safe assembly is connected to the valve body and a first rod member that is connected to the closure member. A linear actuator is movably connected to the fail safe assembly and is operable to move the first rod member. A mechanical override system is connected to the linear actuator and is operable to move the linear actuator relative to the valve body.

Abstract: The present invention provides more efficient, cost effective ethylene productions isolation valve devices and system as well as more efficient, cost effective methods for isolating the flow of matter from one location to another in an ethylene productions operation where the valve comprises a first seat; a second seat aligned with said first seat; a blind; a main body having an orifice dimensioned to align with an orifice in said line; wherein said main body is coupled to said line; an upper and lower bonnet coupled to said main body, wherein said bonnets may be removed in order to replace valve parts without separating the main body from the line; and a plate located inside a bonnet, wherein the plate comprises a planar surface that contacts a surface of the blind.

Abstract: A method and apparatus for pressure testing a plumbing system, includes a resilient body having a body diameter. The resilient body is adapted to elastically deform by when passing through a service opening that is smaller than the body diameter and then resiliently return to the body diameter. A sealing surface is carried by the resilient body. A rigid coupling is positioned on the resilient body. The rigid coupling is adapted for coupling the resilient body to a shaft, such that the shaft is able to manipulate movement of the resilient body. The resilient body is inserted into a service opening of a plumbing system to be pressure tested. The resilient body flexes while being inserted and then resiliently returns to the body diameter with the sealing surface performing a sealing function.

Abstract: A valve assembly for use in a wellhead assembly that includes a valve body, a cavity formed in the valve body, and a flow passage through the valve body that intersects the cavity. Also included is a gate slidable in the cavity between an open position and a closed position. A bore is formed through the gate. A fluidic passage is also formed through the gates that provides fluid communication between the bore and an upstream side of the valve member. The fluidic passage is formed so that when the gate is being moved into the closed position, fluid upstream of the gate enters the fluidic passage and exits into the bore to assist closing the valve.

Abstract: A gate valve of a semiconductor manufacturing apparatus, which is formed between a processing chamber in which processing is performed and a transfer chamber which carries a substrate on which the processing is performed, includes a gate valve at a side of the processing chamber; a sealing member which is formed in the gate valve at the side of the processing chamber; a gate valve at the side of the transfer chamber; a sealing member which is formed in the gate valve at the side of the transfer chamber; and a thermal insulator which is formed between the gate valve at the side of the processing chamber and the gate valve at the side of the transfer chamber.

Abstract: The system according to the invention allows the separation of two equipment items of an installation in a confined environment, without interrupting the confinement inside this installation. It primarily comprises a confinement flange (10) placed tightly between the two parts of the installation, and comprising a slot (12) protected by a temporary cover (11). The assembly is completed by a guillotine made up of two closure plates (20A, 20B) pressed against each other before their insertion into the slot (12). Once this insertion of the guillotine is complete, the two closure plates (20A) and (20B) can be separated from each other so as to each constitute a tight covering of the two parts of the installation to be separated. Application to confinement installations for the implementation of vacuum intervention methods where one wishes to maintain a special confinement.

Abstract: A carburetor having an inlet opening that includes a pair of concavities operative to direct air toward the metering rod of the carburetor. A carburetor having an inlet opening that includes an arcuate manifold adjacent to the inlet opening and in fluid communication with a fuel reservoir. A carburetor having a slide assembly that includes a positioning mechanism operative to adjust the position of the metering rod relative to the throttle slide. A throttle slide that includes a flow guide that bisects an arcuate relief on an underside thereof. A method for configuring the throat of a carburetor that includes an upper portion of a first diameter and a lower portion of a second diameter that is offset from the first diameter. The method comprises deriving an optimum size for the first and second diameters and the offset based on the pumping efficiency and operating parameters of the engine.

Abstract: A blast gate assembly for connecting two hoses includes a first cylindrical section for frictionally engaging with a first flexible vacuum hose, a second cylindrical section for frictionally engaging with a second flexible vacuum hose, and a valve section disposed between the first cylindrical section and the second cylindrical section. The valve section includes a mounting bracket.

Abstract: A gate valve having a body, a chamber housed in the body, a passage through the body that intersects the chamber, a gate for selectively opening and closing the valve, and a cutting edge on the gate. The cutting edge can sever any lines that may be in the valve and still seal after closing. The gate includes a recess formed to collect cuttings formed while severing the line.

Abstract: A gate valve includes a pair of opposing housing members, a gate, primary sealing sleeves and a secondary sealing member. The primary sealing sleeves are disposed in each of the housing members. The gate is configured to slidably pass through a transverse gate chamber defined when the housing members are joined together. The secondary sealing member is secured between the housing members and includes at least one passage or aperture configured to allow lubricating fluid to be applied through at least one of the housing members through the secondary sealing member and onto the gate.

Abstract: A sliding diverter valve. The value includes a body portion with a bore having a diameter, an untreated fluid inlet, an untreated fluid spigot outlet, an untreated fluid diverter outlet, a treated fluid inlet, and a treated fluid spigot outlet. The valve further includes a slider which slides in the bore of the body portion and which, (a) in a first, untreated fluid position, directs untreated fluid to flow from the untreated fluid inlet to the untreated fluid spigot outlet and which blocks any fluid from exiting the untreated fluid diverter outlet and any treated fluid from entering the treated fluid inlet, and (b) in a second, treated fluid position, directs untreated fluid to flow from the untreated fluid inlet to the untreated fluid diverted outlet and which blocks any fluid from exiting the untreated fluid spigot outlet, and permits treated fluid to flow into the treated fluid inlet and out of the treated fluid spigot outlet.

Abstract: A pig receiver and method retrieve pigs in pipeline pigging operations. In one embodiment, a pig receiver includes a pig receiver unit. The pig receiver also includes a pig gate valve assembly disposed on the pig receiving unit. The pig gate valve assembly includes a gate valve. The pig gate valve assembly also includes a first actuator and a second actuator. The pig gate valve assembly further includes a cylinder guide. In addition, the pig gate valve assembly includes a tie bar. Actuation of the tie bar actuates the gate valve. An end of the tie bar is attached to the first actuator, and an opposing end of the tie bar is attached to the second actuator.

Abstract: A valve has a closure member for closing a valve orifice, particularly so as to be tight against gas, in a closed position of the closure member. The closure member can be moved in a closing process by at least one actuator starting from a first position of maximum opening at least along a first partial distance with a linear movement component in direction of its closed position, and the actuator carries out a closing stroke with a linear stroke direction for a movement of the closure member with this movement component. The actuator is so arranged in relation to the closure member that an angle diverging from 0° and 180° is provided between the linear movement component of the closure member along the first partial distance, proceeding from the first position of maximum opening, and the linear stroke direction of the actuator.

Abstract: A method and apparatus are described for accurately measuring the weight of a moving stream of particulate material at different flow volumes. The apparatus includes a dynamic measurement device with a deflectable curved pan for measuring the amount of material flowing along a pathway; a supply source for discharging material along the pathway; and a gate valve having an inclined gate member with a leading edge controlling the volume of material discharged from the supply source, the valve reducing the height of discharge of the material above the dynamic measurement device proportional to the increase in the flow volume of material being discharged. A gate valve is also described that includes a gate member with a fully open position and a fully closed position, the valve aperture being open a width determined by the bridging characteristics of the particulate material being discharged when the gate member is in the fully closed position.

Abstract: The disclosure provides an efficient design for a pressure rated oil field gate valve that meets the challenges of providing a quality product with minimal increase in price due to the design. It minimizes weight increase in the valve body over valves not meeting strict pressure specifications, due to strengthening ribs at strategic places without having to increase the overall body size as in commonplace in the industry. It provides redundancy of seals with minimal costs and no change in seat pockets over valves not capable of meeting the higher standards. It provides multiple shear points along a valve stem that can still allow a user to operate the valve from external to the valve bonnet. It further provides for additional sealing of the valve bonnet to the valve body by using elasticity in metal over long lengths to maintain a compression seal between the bonnet and the body.

Abstract: The present invention generally comprises a floating slit valve for interfacing with a chamber. A floating slit valve moves or “floats” relative to another object such as a chamber. The slit valve may be coupled between two chambers. When a chamber coupled with the slit valve is heated, the slit valve may also be heated by conduction. As the slit valve is heated, it may thermally expand. When a vacuum is drawn in a chamber, the slit valve may deform due to vacuum deflection. By disposing a low friction material spacer between the chamber and the slit valve, the slit valve may not rub against the chamber during thermal expansion/contraction and/or vacuum deflection and thus, may not generate undesirable particle contaminants. Additionally, slots drilled through the chamber for coupling the slit valve to the chamber may be sized to accommodate thermal expansion/contraction and vacuum deflection of the slit valve.

Abstract: A fluid delivery device (402) for fixing to and delivering a fluid into a pressurised pipe (308), the device comprising flow restriction means (404) operable to restrict a flow of fluid through the said pipe (308), thereby generating a restricted flow region (416) within the pipe (308) at or around the position of the flow restriction means (404), as compared to an unrestricted flow upstream of the device, the device further comprising a delivery conduit (408) arranged to open into or proximal to the said restricted flow region (416).

Abstract: An elbow fluid flow valve exhibiting reduced flow loss and including a body having a specified shape and size and defining a short radius associated with an elbow shaped fluid passageway characterized by a first fluid flow inlet and a second fluid flow outlet. A cover secures over the valve body, and such that a generally sleeve shaped annulus is defined therebetween. A light-weight and linearly translatable sleeve is mounted exteriorly of the valve body and within the intermediately defined annulus. The sleeve is operable to be displaced between a first location permitting fluid flow to the outlet and a second location interrupting fluid flow.

Abstract: A gate valve and a method for making a gate valve for use with abrasive fracturing fluids, include provided enlarged spaces in the gate valve body wherein sand or other debris from the fracturing fluid may accumulate without affecting the operation of the gate of the gate valve.

Abstract: The invention relates to a vacuum valve for gas-tight sealing of a flow path, comprising at least one thrust rod, which has a cylindrical connecting section, and a closure plate which is removably mounted on the thrust rod and has at least one concave, semicircular first rod recess corresponding to the connecting section. A clamping piece, which has a concave, semicircular second rod recess corresponding to the connecting section, is adjustably mounted by means of a mechanical fixing element on the closure plate in such a way that the semicircular first rod recess and the opposite semicircular second rod recess define a cylindrical holding region which is adjustable in width and in which the cylindrical connecting section is detachably held.

Abstract: A safety valve is positioned in supply plumbing that supplies a fluid medium such as natural gas to a point of use structure such as a home. A mechanical actuator is provided remote from the safety valve but mechanically connected to the safety valve. This allows the actuator to be positioned, for example, directly on the point of use structure, avoiding the need for separate bracing for the valve. The valve can be provided with a tee fitting or can be a separate gate valve. The mechanical actuator can be actuated by seismic disturbance, manually, or by activation by remote sensor or home security system.

Abstract: A valve system comprising a closure member that is linearly translatable within a valve body. A hydraulic override assembly comprises a first end that is connected to the valve body and a first rod member that is connected to the closure member. A linear actuator is connected to a second end of the hydraulic override assembly and comprises a second rod member that is operable to move the first rod member.

Abstract: A gate valve includes a valve plate for opening and closing a gas passageway, and an air cylinder and a shaft for linearly moving the valve plate between a main housing portion and a storage housing portion of a housing, and the air cylinder is arranged on the first lateral surface side of the housing in parallel with a moving direction of the valve plate, and the shaft is arranged so as to overlap with the valve plate in parallel with the moving direction. A tip end of the shaft is coupled with the valve plate at a position situated near a front end portion in the moving direction thereof.

Abstract: A gate valve includes a valve body to be pressed against a peripheral surface around opening through which a processing target object is loaded and unloaded, pressed members arranged on a surface of the valve body around the opening, a main slider which slides in a direction parallel to the peripheral surface around the opening and pressing mechanisms, provided at the main slider, for pressing the respective pressed members. Each of the pressing mechanisms includes a cam having a protrusion for pressing the valve body against the peripheral surface around the opening and an inclined portion sloping downward from the protrusion. The pressing mechanisms serve to press the valve body in a direction substantially perpendicular to the peripheral surface around the opening in a state that the valve body is positioned to face the opening, so that the valve body is pressed against the peripheral surface around the opening.

Abstract: A pendulum gate valve including an expandable gate which pivots when unexpanded to selectively block a vacuum or other pressure-differential passage. The valve includes a valve plate sealing one side of the passage and a ring or barrier plate abutting an opposed side of the passage when the gate member is expanded. A compression spring biases apart the valve plate and ring to close the valve by means of respective two-stage hangers attached thereto, extending along the spring, and having distal ends capturing the spring. Pneumatic pressure applied to a pneumatic cavity formed between the middles of the two-stage hangers and accommodating the spring forces apart the valve plate and ring to open the valve in the blocking position. Thereby if pressure fails, the valve fails to a sealed state. The axially movable valve or barrier plate is advantageously water cooled to allow use with a heated processing chamber.

Abstract: A gate valve comprising a valve body including at least a first seat adjacent to a groove. A gate is slideably carried in the valve body for movement between an open position wherein the gate is spaced from the at least one seat and a closed position wherein a portion of the gate is positioned within the groove and the gate is sealingly engaged with the at least one seat. A bridging member is biasedly positioned within the groove and is configured to substantially bridge the groove when the gate is in the open position.

Abstract: A slide valve, in particular for blocking a line conveying media, is provided with a housing (2) having a passage opening (3) and with a slider plate (4) moveable within the housing (2) at right angles to the passage opening (3). The latter can be displaced from an open position into a closed position blocking the passage opening (3) tightly by means of a drive mechanism (10). A lateral seal (20) is respectively disposed in a respective groove (20?) in the housing (2) above the passage opening (3) on both sides of the slider plate (4) at right angles to its direction of displacement. The inside and outside of the housing (2) and the slider plate (4) are provided with at least one layer forming a temperature barrier, and the lateral seal comprises a high temperature-resistant layer or sealing compound. The risk of a leak into the atmosphere and/or in the passage during a fire or during extinguishing efforts is thus substantially reduced.

Abstract: An outfeed gate includes a fixed plate and a sliding plate, wherein bearing strips protect the fixed and sliding plates from excessive wear as they slide over each other. The outfeed gate safely accepts material from a high temperature and pressure environment to an ambient environment, and deposits the material in a material exit apparatus.

Abstract: The universal valve disclosed herein operates as both an actuated and non-actuated valve embodiment, both of which are assembled using a common universal valve body. When functioning in the actuated valve embodiment, the invention includes components which open a small orifice to provide pressurization or de-pressurization before the disk is lifted off the seat and the poppet valve is opened.

Abstract: A short stroke flow control device or valve which is adapted to provide velocity control trim in a short stroke. The valve constructed in accordance with the present invention comprises multiple disk stacks or cages which are separated from each other by intervening spacers, and are placed axially in a valve gallery clamped between a seat ring and bonnet of the valve. The fluid passageways in the cages are throttled in a controlled manner by a plug which defines multiple throttling elements or plug lobes, the number of plug lobes defined by the plug preferably being equal to the number of cages included in the valve. The plug lobes of the plug control the flow of fluid through the disk stacks or cages in tandem. All of the throttling elements or plug lobes of the plug, with the possible exception of the plug lobe which contacts the seat ring for closure, is larger in diameter than the remainder of the plug and has at least one kidney bean shaped flow passage extending therethrough.

Abstract: A movable member is fitted in the middle in the vertical direction of a valve body core fitting that forms a gate valve body, and the movable member presses an elastic seal member from the inside of the seal member toward a tube inner wall surface located in a direction crossing the direction of insertion of the seal member. The movable member has arms and contact sections. The arms each have a second inclined section for pressing the elastic seal member against the tube inner wall surface upon receiving pressing action from a first inclined section that is formed on a pressing member and changes the direction of pressing. The contact sections are in contact with and press the inside of the elastic seal member. The contact sections of the movable member have recesses having inside the elastic seal member.

Abstract: A threadform for a gate valve has a set of threads on a stem that engage a threaded receptacle of the gate. When the stem is rotated, the gate moves. The threads have a thread height to thread base thickness ratio that is at least the inverse of 0.7 times e raised to 0.388 divided by a nominal thread diameter of the threads. That ratio is at least 1.1.

Abstract: A double-disc gate valve is provided, the shut-off or valve discs of which are displaceable from an open position into a closed position and vice versa by means of an actuator rod, there being associated with the actuator rod a locking device by means of which the valve discs, together with the actuator rod, are fixable in the closed position. The locking device is movable in the longitudinal direction of the actuator rod relative thereto from an unlocking position into a locking position and vice versa, the locking position being variable in dependence upon the closed position of the valve with predetermined maximum pressing force of the valve discs against the associated valve housing sealing seats.

Abstract: A knife gate valve includes a reinforced valve seat which prevents displacement of the valve seat when the valve is opened and closed. The valve includes a valve body defined by a first and second body halves. The valve halves are assembled to define a flow path, a knife gate channel and a seat channel. A knife gate is disposed between the body halves and is adapted to traverse the gate channel. The knife gate is configured to be in an open position to allow process flow through the valve and a closed position to prevent process flow through the valve. A seat assembly is positioned within the channel guide and is defined by a horizontal segment, a pair of vertical segments and a lower segment. The seat assembly is compressed between the first and second valve body halves. At least one reinforcing plate is disposed within a portion of the horizontal segment, such that the horizontal segment maintains its rigidity when the knife gate traverses the seat assembly.

Abstract: In combination with an external actuator for electrically operating a gate valve for use with a recreational vehicle, a gate valve within a housing, a flow passageway, a valve closure member moveable transversely of the flow passageway to cause the passageway to open and close. The valve closure member comprises a valve stem and a connected handle. Also provided is an electrical control unit with a motor, an electrical drive means and a drive shaft to engage the handle. A switch means electrically connected to the control unit has an on and off position. In the on position, the actuator lifts the handle to move the gate and open the flow passageway. In the off position, the actuator retracts the handle to move the gate linearly to close the flow passageway. Also provided is a releasable ring pin which confines the handle and which, when removed, enables the manual override of the external actuator.

Abstract: A slide valve, in particular for blocking a line conveying media, comprises a multi-part housing (13, 14) having a passage opening (12) and in which a slider plate (15) operable by a drive component is moved longitudinally. To both sides of the slider plate (15), laterally to its direction of movement, a longitudinal seal (20) is respectively disposed above the passage opening in a longitudinal groove (17) in the housing (13, 14). This longitudinal seal (20) respectively has an elastic sealing profile (21) and bars (22) adjacent to the latter. The respective elastic sealing profile (21) is preferably provided on the front side with two sealing lips (23) spaced apart from one another, touching the slider plate (15), and in the central region with groove-shaped chambers (25) on both sides.

Abstract: A gate valve includes a pair of opposing housing members, a gate, primary sealing sleeves and a secondary sealing member. The primary sealing sleeves are disposed in each of the housing members. The gate is configured to slidably pass through a transverse gate chamber defined when the housing members are joined together. The secondary sealing member is secured between the housing members and includes at least one passage or aperture configured to allow lubricating fluid to be applied through at least one of the housing members through the secondary sealing member and onto the gate.

Abstract: A gate valve includes a pair of opposing housing members, a gate, primary sealing sleeves and a secondary sealing member. The primary sealing sleeves are disposed in each of the housing members. The gate is configured to slidably pass through a transverse gate chamber defined when the housing members are joined together. The secondary sealing member is secured between the housing members and includes at least one passage or aperture configured to allow lubricating fluid to be applied through at least one of the housing members through the secondary sealing member and onto the gate.

Abstract: An object is to provide a gate valve capable of preventing operational deficiencies caused by particulate materials accumulating in a valve box, thus providing superior sealing properties and high durability, having a simple structure, and allowing inspection and maintenance to be performed easily.

Abstract: A rectangular gate valve having an improved driving action is disclosed. The rectangular gate valve of the present invention includes a sealing member, which opens or closes a wafer moving passage, a main shaft, which is coupled to the sealing member and has a guide member, and a housing bracket, which has a first guide slot, into which the guide member is inserted. The gate valve further includes a valve drive unit, which is provided in the housing bracket and has an air cylinder, a piston, a piston shaft, a moving unit and a connection link. The gate valve further includes a guide bracket, which has a vertical bracket, a second guide slot and a horizontal bracket. The gate valve further includes a guide link, which is moved along the second guide slot to guide movement of the main shaft.

Abstract: A double check valve (10) with two separate elements (20, 25) individually movable to close the valve and collectively movable to open the valve. The separate elements are independently closing the valve, and collectively controllable to open the valve, to allow pressure release or to allow injection of fluid (e.g. lubricant). In an example, the double check valve includes two separate check valves with a stinger element (30) between them which is operable to internally sting the one check valve when (e.g. by action of) the other check valve is stung by a user (e.g. using a stinger means) thereby to open both check valves individually and the double check valve as a whole.

Abstract: A shutter and gate valve assembly includes a valve housing that defines a passage therethrough, a valve member having a valve aperture, the valve member movable between a non-operating position that seals the passage and an operating position that aligns the valve aperture with the passage, and a shutter movable between a closed position that blocks the valve aperture and an open position that unblocks the valve aperture. The shutter member may be affixed to and movable with the valve member between the non-operating position and the operating position. The shutter may be provided with a shutter aperture that is aligned with the valve aperture in the open position.

Abstract: A directional gate valve is disclosed. The gate valve comprises a valve body. A first flow path, a second flow path and a third flow path are positioned in the valve body. The second and third flow paths are capable of fluidly communicating with the first flow path through a connecting flow configuration. A gate is positioned within the gate valve at a location separate from the connecting flow configuration. The gate is configured to move back and forth between a first position and a second position in the valve body. When the gate is in the first position the gate provides fluid communication through the second flow path and simultaneously blocks fluid communication through the third flow path. When the gate is in the second position the gate provides fluid communication through the third flow path and simultaneously blocks fluid communication through the second flow path.

Abstract: A pipe clamp includes a deformable cylindrical sealing sleeve having a continuous side wall with a slotted opening extending 180 degrees around the circumference of the side wall adapted to receive a gate valve plate. The slotted opening has protruding lips bordered by clamping wedges. Clamps are provided for clamping the sealing sleeve to a pipe. Pressure members are provided. A clamping force with pressure members upon the clamping wedges to clamp the lips into a closed position thereby creating a fluid tight seal when the gate valve plate is removed.