Abstract: Variable flow characteristic valves are disclosed. A disclosed example valve for controlling a flow characteristic therethrough includes a first plate having a first aperture pattern, a second plate proximate the first plate, the second plate having a second aperture pattern, and a rotator to rotate the second plate relative to the first plate to vary a degree of alignment between the first and second aperture patterns.

Abstract: A tube nut and a brake tube assembly are provided. A pipe is disposed within the bore of the nut. A first coating is disposed on an outer surface of the nut. The first coating has a corrosive resistance greater than the bore so as to promote corrosion within the bore. The corrosion forms a seal which is pinched between the bore and the pipe. The tube nut and brake tube assembly may include a second coating disposed on the bore. The first coating has a corrosive resistance greater than the second coating so as to promote corrosion within the bore.

Abstract: Embodiments of gate valves and methods of using same are provided herein. In some embodiments, a gate valve for use in a process chamber may include a body having an opening disposed therethrough from a first surface to an opposing second surface of the body; a pocket extending into the body from a sidewall of the opening; a gate movably disposed within the pocket between a closed position that seals the opening and an open position that reveals the opening and disposes the gate completely within the pocket; and a shutter configured to selectively seal the pocket when the gate is disposed in the open position. In some embodiments, one or more heaters may be coupled to at least one of the body or the shutter.

Abstract: Embodiments of the invention described herein thus provide improved flush valves that are designed with improved venting features and improved inlet designs. The described venting features and inlet designs, either alone or in combination, can help prevent ingestion of waste into the interior of the valve.

Abstract: A gate valve assembly having metallic valve seats that are axially resilient and maintain a static sealing interface between the valve seat and a body pocket and a sliding dynamic sealing interface between the valve seat and a gate in the valve assembly. The valve seats are annular members having slots formed radially through the valve seats from the inner and outer circumferences. Sleeves may be provided that are coaxial to the valve seats; the sleeves may be on the inner surface of the valve seats, outer surface of the valve seats, or both. Shims may optionally be set in the slots.

Abstract: A disc valve with a diversion hole for a solid granule medium aims to solve the problem of material accumulation in a valve cavity and includes a valve body with a valve passage, the valve cavity communicated with the valve passage is formed in the valve body, a valve disc for closing and opening the passage is arranged in the valve cavity, the valve disc is fixedly connected with a valve rod through a valve rod connecting hole of an eyeglasses plate, and the eyeglasses plate is also provided with the diversion hole and a hole for placing the valve disc. The outer wall diameter of the diversion hole is greater than the diameter of the valve passage, and the height of the diversion hole is the same as the length of the valve passage passing through the valve cavity.

Abstract: The apparatus and method of the invention provides for a flush valve for controlling the vacuum evacuation of waste from a receptacle. The flush valve comprises an inlet port for receiving the waste from the receptacle, an outlet port opposite the inlet port and in fluid communication therewith, a source of vacuum connected to the outlet port and a uniquely designed discharge disk disposed between the inlet and outlet ports for interrupting the flow of fluid therebetween. In the preferred embodiment the flush valve is integral with a latticed panel of the waste receptacle stand.

Abstract: To reduce invasion and adhesion of foreign matters into and onto the gating-member retreat room in the transition from the gate-open state to the gate-close state including retreat and on-shutting-movement of the gating-member. The shutter, being moved in the shuttering movement room, shuts the entrance aperture by making the shutter sealing contact with the stationary seal by such movement of the shutter itself when the gating-member is accommodated in the gating-member retreat room, and, also being moved in the shuttering movement room, shuts the entrance aperture by making the shutter sealing contact with the second gate seal by such movement of the shutter itself when the gating-member, being moved in the shuttering movement room, shuts the exhaust port by making the first gate seal contact with the stationary seal by such movement of the gating-member itself.

Abstract: A bi-directional pressure relief valve for a plate fin heat exchanger including an elongated heat exchanger tube having ends and a channel for the flow of a fluid from one end of the tube to the opposite end and a bi-directional reed valve positioned within the channel. The reed valve allows fluid to flow within the channel in either direction when a pressure differential across the reed valve is sufficient to urge the reed valve to an open position, thereby enabling the heat exchanger to be used independent of the direction of fluid flow through the heat exchanger.

Abstract: A rotary gate valve includes first and second opposing housing members having coaxial pathways and defining a gate channel when joined together. A gate is positioned within the gate channel when the valve is in a closed position to prevent media from flowing through the pathways and rotationally displaced from the channel when the valve is in an open position to allow media to flow through the pathways. First and second annular primary sealing sleeves are disposed within the first and second housing members and are adapted to sealingly engage each other when the valve is in the open position, and with the gate valve when the valve is in the closed position. A secondary sealing member is disposed around an upper portion of the gate and secured between the housing members above the first and second annular primary sealing sleeves to prevent process media from entering the housing members.

Abstract: Even when a gate valve for a vacuum apparatus used in a vapor deposition apparatus is in an open position, reliability of keeping a vapor deposition chamber vacuum can be improved by protecting an inner wall surface of a valve casing and a sealing member of a valve body against a vapor of a vapor deposition material. A gate valve (1) for a vacuum apparatus (50) is used as a gate valve for an electron gun (52). When the valve is in a closed position, as with the related art technique, a valve body (3) detaches an electron gun (52) part from a vapor deposition chamber (51).

Abstract: A pendulum vacuum gate valve comprised of a housing for enclosing a valve plate assembly having a pair of air pressure actuated floating seal plates disposed on opposite sides of the valve plate assembly which is actuated by a gate arm to reciprocate between open and closed positions and intermediate stop positions for controlling gas flow between intake and exhaust conduits connected to the housing.

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: A pendulum gate valve includes a housing defining a valve chamber, the valve housing having a vacuum-chamber opening in a front wall and an access opening in a rear wall aligned with the vacuum-chamber opening and defining a through-hole extending from one side of the valve housing to the other side for providing access to the vacuum chamber, a carriage assembly pivotally mounted within the valve housing and moveable between a open position remote from the openings and a closed position between the openings, a valve plate reciprocally mounted on one side of the carriage assembly and movable between an unsealed position spaced from the vacuum-chamber opening and a sealed position sealing the vacuum-chamber opening, a valve-plate actuator carried on the carriage assembly for moving the valve gate between the unsealed and sealed positions, a retractable support reciprocally mounted on another side of the carriage assembly movable between a retracted position spaced from the access opening and an extended positio

Abstract: A valve assembly including a housing having a flow channel and an annular surface surrounding the flow channel, a slide plate movable to a closed position, and a seal ring positioned between the annular surface and the slide plate. The seal ring includes a first and second sides, a first surface extending between the first and the second sides and facing towards the annular surface of the housing, and a second surface axially spaced from the first surface and extending between the first and the second sides and facing towards the slide plate. The second surface includes a continuous annular sealing portion for contacting the slide plate when the seal ring is biased against the slide plate so that a fluid-tight seal can be formed between the continuous annular sealing portion and the slide plate, and at least one passageway positioned between the annular sealing portion and the second side.

Abstract: Gate for throttle valves composed of a central supporting portion constituted by a thermoplastic material and an edge portion constituted by a thermoplastic elastomeric material belonging to the same chemical family as the thermoplastic material; the gate is produced by means of a coinjection process of the thermoplastic material and the thermoplastic elastomeric material.

Abstract: A gate valve has a valve rod equipped with a valve plate having a pair of valve plate surfaces, wherein the valve rod is tilted by an actuator to thereby effect highly reliable valve opening/closing operation with a simple construction. In the gate valve, the valve rod, which is equipped with the valve plate with the pair of valve plate surfaces, is rotatably supported, and raised and lowered by a raising/lowering cylinder, the valve rod being tilted by an actuator, a combination of a cam member and a cam raising/lowering cylinder, a combination of a driving block and a cylinder, or a combination of a connection member and a driving device (not shown) to thereby effect valve opening/closing with the pair of valve plate surfaces.

Abstract: A gate valve (2) comprising valve body (4, 6) and a gate element (8) movable to selectively interrupt a flow passage through the valve body (4, 6). The gate element (8) is supported for rotation in a correspondingly shaped recess (14) in the valve body (4, 6). In one embodiment rotation of the gate element (8) is effected by drive means comprising a first member (10) mounted for rotation in the valve body (4, 6) and a second member (12) mounted for rotation in the gate element (8), the first and second members (10, 12) being linked such that rotational movement of the first member (10) is translated into rotational movement of the gate element (8) by the second member (12). In an alternative embodiment rotation of the gate element (8) is effected by a toothed rack (82).

Abstract: A single slot valve shaft is in a vacuum body between adjacent vacuum chambers, such as a process module and a transport module. Separate valves are provided on the single shaft actuator for each of two valve body slots, each body slot being closed or opened according to the position of the single shaft. The separate valves allow a vacuum condition to be maintained in the transport module while an adjacent process module is open to the atmosphere for servicing. The single shaft allows access to an open valve for servicing the open valve by way of stops that limit drive travel and hold the valve in an open, but not vertically-spaced, position relative to a respective slot. The open valve is easily reached by a gloved hand of a service worker. The single shaft is mounted on a first cradle, and the first cradle is mounted on a second cradle. Two separate shaft drives move the two cradles to position the single shaft to locate the valves between the slots to open one slot and close the other slot.

Abstract: A butterfly damper has a plurality of blades movable between an open and a closed position in response to an operating means attached to the blades and attached to an actuating means. A shaft rotatable about its axis in response to said actuating means has crank arm means attached to it and to said blades, to open and close said damper in response to rotation of said shaft. Connector arm means are pivotally connected to crank arms and pivotally connected to said blades at pivot point locations such that the pivot points of said pivotal connections are over center of the plane of the axis of said shaft when the blades are in the closed position.

Abstract: A single slot valve shaft is in a vacuum body between adjacent vacuum chambers, such as a process module and a transport module. Separate valves are provided on the single shaft actuator for each of two valve body slots, each body slot being closed or opened according to the position of the single shaft. The separate valves allow a vacuum condition to be maintained in the transport module while an adjacent process module is open to the atmosphere for servicing. The single shaft allows access to an open valve for servicing the open valve by way of stops that limit drive travel and hold the valve in an open, but not vertically-spaced, position relative to a respective slot. The open valve is easily reached by a gloved hand of a service worker. The single shaft is mounted on a first cradle, and the first cradle is mounted on a second cradle. Two separate shaft drives move the two cradles to position the single shaft to locate the valves between the slots to open one slot and close the other slot.

Abstract: A light weight gate valve and method for a aircraft vacuum toilet system. The valve resists jamming due to scale buildup, thereby reducing maintenance costs associated with repair or cleaning. The gate valve is intended for mounting between two portions of a sewer pipe connected between a waste receiving bowl and a waste reservoir. More particularly, the gate valve includes a housing having an internal valve chamber with an inlet opening opposing an outlet opening. A slice-of-pie shaped rotary gate is mounted within the chamber of the housing for rotation about a predetermined axis to selectively allow fluid communication between the inlet and outlet of the housing for flushing of the toilet. The gate has opposing side surfaces, each of which opposes an associated sidewall of the chamber enclosing the gate. The distance between each the side surface of the gate and its associated sidewall of the chamber is from 0.050 inch to 0.120 inch.

Abstract: A burner isolation valve or gate for use in the coal-delivery pipes of coal-fired power plants. Safety regulations often require that two valves be placed in the coal delivery line between a combustion chamber and an exhauster or pulverizer type deliver source to isolate the section of pipe in between for maintenance and other access. The invention includes a novel valve plate and actuation assembly, a novel housing adapted to sealingly enclose the valve plate, and a novel sealing mechanism for the valve plate and housing adapted to keep coal fines and dust out of the outboard portion of the housing in which the valve plate rests in the valve-open position.

Abstract: An engine shutdown valve comprises a housing and a gate movable within a housing between a first position where the air flow through the shutdown valve is substantially unrestricted to a second position where the opening is restricted thereby stopping air flow. The gate is pivotable about an axis. The gate has an extension with a recess which is engageable by a piston movable between a first position where the gate is held in its latched position and a second position out of engagement with the recess so as to allow the gate to move to a position where the air passageway is closed. The gate is movable by a rod attached to the gate lever and which rod is biased by a compression spring mounted within a sleeve. The spring is adjustable to increase or decrease the force on the gate and such adjustment can be accomplished from outside the shutdown without disassembly of the entire valve.

Abstract: A gate valve has a manual actuator that includes a crank having a direct pivotal connection with a slidable valve plate. The valve plate has a teardrop configuration that enables the valve plate to swing around the pivot connection as the plate slides along guide slot edge surfaces, between a closed position and an open position. Only a relatively small manual force is required to operate the valve.

Abstract: A cut-off diaphragm gate valve has two members (1) of the shape of a quadrangle located opposite to each other as in mirror reflection. Passage openings (4) are disposed in the four corners of each of the members (1). Control screws (5) furnished with nuts (6) and washers (7) are inserted in the passage openings (4). The control screws (5) hold the two members (1) together and place the two members (1) in the proper relative position. Threaded attachment openings (8) made in each of the two members (1) serve for connecting the cut-off diaphragm gate valve to the liquid transport installation. Each of the two members is in part immersed in a profiled gasket (9) vulcanized together with each of the members (1). A profiled diaphragm (19) is nested between the profiled gaskets (9). The profiled diaphragm is seated rotatably on a fixed pin (18). A regulating and limiting pin (27) is located at a side edge (26) of the diaphragm (19) for establishing an open position of the cut-off diaphragm gate valve.

Abstract: A device for cutting off the flow in a conduit for fluids, consisting of a sluice (2), transversely arranged in a conventional conduit for fluids (1) between two flanges (3), one or two flanges (3) being fitted with a tab (6), a hole and axle (7) around which the sluice (2) turns according to a circular motion establishing fluid cut off or flow positions. In an alternative embodiment of the invention for performing connections under pressure, a mounting is provided on the conduit, constituted of a tubular assembly consisting of a reel (9) and a seat (10), which is fastened to the conduit by means of straps (11), a sluice (15) is inserted between the tubular assembly and the reel.

Abstract: A valve comprising a gate closure member which is actuated by a stem that is operatively connected with the valve operator handle at the upper end of the stem and the lower end of the stem connected to a toothed pinion engaging an arcuate toothed rack on the gate thereby rotating the gate, or to a toothed pinion engaging a linearly straight toothed rack on the gate thereby reciprocating the gate across the fluid flow-path in a direction transverse to the stem axis, an when the closure member is a tapered wedge gate, the stem is operatively connected with the valve operator handle by means of a Lift-and-Turn mechanism.

Abstract: In a conveyor conduit comprising at least one valve having a movable closure body, for loose material which is to be pneumatically conveyed, the closure body of the valve is permeable to the conveying air in the closure position of the valve in which it blocks the conduit cross-section for the material being conveyed, in particular for granulate material such as sand.

Abstract: An engine shutdown valve comprises a housing and a gate movable within a housing between a first position where the air flow through the shutdown valve is substantially unrestricted to a second position where the opening is restricted thereby stopping air flow. The gate is pivotable about an axis and a drive is located concentrically about the axis to rotate with the gate. The drive has a recess which is engageable by a piston movable between a first position where the gate is held in its latched position and a second position out of engagement with the recess so as to allow the gate to move to a position where the air passageway is closed. The piston assembly is located substantially wholly within the housing with only the piston of the piston assembly extending therefrom. The housing is divided into two halves joined together with cap screws having axes transverse to the axis of rotation of the gate.

Abstract: A rotary isolation door for use in a conduit extending between an auger feeder and an incinerator which opens to allow the auger feeder to convey material to the incinerator and closes to prevent burn-back of material in the conduit from the incinerator. The door includes a first housing plate having a first opening offset from its center, An annular spacer-plate attached to the first housing plate, and a second housing plate having a second opening offset from its center and attached to the side of the spacer plate opposite the first housing plate. The first, second and spacer plates are attached to form an interior chamber within which is rotatably mounted a door plate having an offset opening such that a flow path is formed when the openings of the first and second housing plates and door plate are aligned.

Abstract: A valve for connection in a pipeline or duct for the conveyance of a fluent medium includes a valve plate which is movable laterally relative to the duct between respective open and closed positions, with resilient sealing means provided on or in association with the valve plate. The sealing means is provided on an axially movable member to engage one face of the valve plate, while the opposed sealing means is carried by a fixed end member so that the valve plate is clamped between them. Either of the sealing means may be omitted. A ram actuates the valve plate by rotation of a shaft while simultaneously rotating a control ring forming part of the control mechanism which moves the member axially to clamp and release the valve plate.

Abstract: A turn disc valve (10) includes a rigid, sealed, valve body having first and second, parallel, generally coextensive side-wall rigid plates (20 and 22) with a spacing wall (24) sealed between them to define a flat cavity therebetween. A relatively-resilient, high-density polyethylene, flat liner snugly fits inside said housing cavity and is made up of first and second substantially-flat side liner elements (32 and 34), each of a size and shape for substantially covering opposite interior side walls of the flat body cavity, and a spacer insert element (36) positioned between them. The liner defines a circular valve cavity, with the body side-wall plates and the side liner elements defining a fluid passage through the valve. A circular, flat, gate (16) is positioned snugly in the valve cavity but has freedom of rotation.

Abstract: A packing resistant valve has a gate rotatably mounted within an angled valve body and an inlet face of the gate defines a concave recess for inducing eddy currents in fluid flow impinging thereon. The eddy currents direct fluid flow away from the valve body, reducing the tendency of the fluid to accumulate within the valve body. Because the valve body is angled, material tends to drain from the body under the influence of gravity. Also, the angled configuration results in the formation of an air pocket within the valve body, precluding packing therein. In one embodiment, a mechanical seal is provided to preclude fluid leakage across the valve stem. In a further embodiment of the invention, a diverter valve assembly is disclosed, which includes a diverter plate for preventing the impingement of fluid against the closed valve disk.

Abstract: The valve comprises a two-piece housing consisting of a body and a flat cover. The body is milled out to define a working chamber. A port extends through the body wall to communicate with the chamber; a second port extends through the cover wall. The two ports are aligned at one side of the chamber, so that the remainder of the chamber provides a storage cavity. A gate valve comprising a stem and gate is wholly contained within the chamber. The base of the stem is pivotally connected on a shaft journalled in the housing, so that the gate may be rotated or swung along an arc from the storage cavity to a blocking position across the ports. Disengageable means are provided to normally lock the gate valve in the stored position. Means are also provided to bias the gate valve to the blocking position when the locking means are disengaged. The assembly is flat and compact and is particularly adapted to fit in the crowded confines of an engine.

Abstract: In order to resist alteration of the spring forces utilized for applying seal pressure between the valve bodies in sliding gate valves for molten metal pouring, particularly those of the manually operated type, the valve support plate and the mounting plate are arranged to form a narrow slot that receives the valve actuator and presents insufficient clearance to permit excessive relative displacement between the valve members. The valve further incorporates releasable attachments, two of which serve as hinge connections for the support plate while the other serves as a latching member. Each of the attachments comprise clevis-mounted eyebolts in which the clevises have predetermined dimensions to establish a fixed, pre-set distance between the plates upon reassembly of the valve after opening and thus insure repeatability of the spatial relationships between the valve bodies and, concomitantly, of the seal pressure between the members.

Abstract: An engine shutdown valve comprises a substantially circular gate valve movable about an axis between open and closed positions within a valve housing mounted in an engine induction manifold. A gate lever connects the gate valve with the axis and a movement mechanism acts to move the lever between the two positions. A latching mechanism holds the gate lever and gate valve in the open position and a release mechanism is operable to release the latching mechanism when desired. The latching release and movement mechanisms are all located in a latch housing which is located exterior of the valve housing and manifold.

Abstract: A rotating disc gate valve for controlling fluid flow in a flow line comprising a valve body having a flow passageway and a cavity transverse to the flow passageway to receive a flow control assembly. The flow control assembly includes first and second valve seat carriers each having a plurality of valve seats thereon which are aligned to form valve seat sets and an independent rotation means for rotating the valve seat carriers whereby replacement valve seats can be axially aligned with the flow passageway without dismantling the valve body. The flow control assembly includes a flow control disc mounted between the valve seat carriers.

Abstract: A gate valve having an expandable valve closure apparatus which is capable of expanding to seal two oppositely located parts in its valve housing. The expandable valve closure apparatus if pivotally mounted for movement on the end of a swing arm member to permit the expandable valve closure apparatus to be moved from its operative position in the vicinity of the ports in the valve housing to its inoperative or stowed position within the valve housing. Expansion of the expandable valve closure apparatus is accomplished by compressed air that is fed into a bellows that forms part of the expandable valve closure apparatus. Contraction of the expandable valve closure apparatus is accomplished by permitting the compressed air to be released from within the bellows and by springs which form part of the expandable valve closure apparatus. Air pressure is also utilized to move the expandable valve closure apparatus from its operative to its inoperative position and from its inoperative to the operative position.

Abstract: A pendulum gate valve with a pressure tight housing and inlet and outlet openings arranged on opposite sides of the housing. The drive rod for the pendulum frame is guided throughout its total path by a joint connected to the pendulum frame which can swivel about the shaft of the pendulum frame but can in addition also move independently of the swiveling motion of the pendulum frame. A guide mechanism is provided for the further movement of the joint outside the swiveling range, which forces the joint onto a path that runs substantially parallel to the drive rod. The guide mechanism consists of a thrust rod forming part of the pressing device which urges the gate valve plate against the sealing bearing surface and which is connected to the drive rod. The thrust rod is mounted in a longitudinally movable manner in the pendulum frame and runs parallel to the drive rod in the closed position of the gate valve plate.

Abstract: A vacuum device for performing medical procedures such as a curettage, or the like. The device includes basically an evacuated vessel, a cannula or some other form of medical implement, and a valve arrangement for selectively applying the vacuum to the cannula. The present disclosure deals specifically with a novel valve arrangement for the device and various vacuum indicators that can be employed to provide a visual indication as to the presence of a vacuum within the vessel.