Abstract: A repair of a butterfly valve having metal seat includes de-watering of the valve, and movement of the disc to the open position. As in the prior art, the extant (usually brass) valve seat is machine in situ and capped with a stainless steel substitute seat having relatively low slope in the range of 10.degree. to 20.degree. with respect to the closing valve disc. The valve disc edge and valve disc edge caps are removed. A new valve flap seal clamp and relatively hard rubber seal (in the range of 70.+-.5 shore) is inserted. The new valve seal edge clamp has a profile to completely capture the inserted rubber valve seal edge and assure that all elastic extrusion occurs only to and toward the refurbished valve seat. This elastic extrusion necks down and decreases in cross-section toward the edge of the disc of the valve. When the clamp is compressed, the elastic section of the rubber valve seal is extruded to extend to and toward the valve seat.

Abstract: A low-leakage air valve assembly 10 for an air intake manifold 16 includes a butterfly valve 12 constructed for mounting on a rotatable shaft 14. The butterfly valve 12 includes a first 32 and a second wing 34 with first elastic sealing means 36 mounted about the periphery of the first wing 32, and second elastic sealing means 40 mounted about the periphery of the second wing 34. The first elastic sealing means 32 includes a projecting lip 38 for sealingly contacting the wall of the valve manifold 16. The second elastic sealing means 40 includes a beam portion 42 for sealing contact with shoulder 28 of manifold 16. Third elastic sealing means 44 is axially positioned at each side of the passage 30 in the butterfly valve 12 and radially provided around a portion thereof. The first area 54 defined by the first sealing surface which is the first wing 32 and first elastic sealing means 36 is larger than the second area 56 defined by the second wing 34 and second elastic sealing means 40.

Abstract: A butterfly valve comprising a cylindrical valve body (1), a sheet ring (5) fitted into the inner periphery of the valve body (1), and a discoid valve discoid valve disk (3) for opening or closing the valve. When the valve is opened by rotating the valve disk (3), a gap forms at the half of the valve disk (3) that is rotated downstream between the sheet ring (5) and the sealing surface (3c) of the valve disk (3). The gap between the sheet ring (5) and the sealing surface (3c) of the valve disk (3) expands and a second gap is formed at the half of the valve disk (3) that is rotated upstream between the sheet ring (5) and the sealing surface (3c) as the valve disk (3) further opens. The sheet ring (5) is not influenced by turbulent flow produced due to a narrowed channel (4) because the sheet ring (5) is positioned to the upstream side of a position where the channel (4) is most narrowed when a valve opening rate is approximately 15% in which the load applied to the sheet ring (5) due to fluid is maximized.

Abstract: A throttle body (11) has a through-bore (18), a circular throttle blade (20) of nominal uniform thickness is disposed within the through-bore and on a cylindrical shaft (22). The through-bore has two generally semi-circular ledges (56, 58) spaced upstream and downstream respectively from an imaginary flat plane that contains the shaft axis, each at a distance substantially equal to one-half the blade thickness. One ledge occupies essentially one semi-circumference of the through-bore for sealing with one of the opposite semi-circular perimeters of the throttle blade when the blade is closed, and the other occupies essentially an opposite semi-circumference of the through-bore for sealing with the other semi-circular perimeter of the blade when the blade is closed.

Abstract: The present invention relates to a connection collar for a duct ventilation system and furnace. The connection collar is comprised of a self-guiding and self-locking damper valve, which when positioned becomes part of a completely sealable joint when used with preferably flexible insulated heating pipe. With the adjusting apparatus and locking apparatus completely contained within the connection collar the connection collar forms a vapor barrier when used with the preferable pipe and or furnace. The self-locking and self-guiding apparatus comprises of a spring biassing arrangement and a cone shaped receiver equipped with catch teeth which when engaged mate with teeth circumferentially positioned on the damper apparatus.

Abstract: A sealing system for a closing flap in a passage orifice of a facility where, in a coupled position, the closing flap rests in parallel against an identical closing flap on another facility in a sealing plane and cooperates therewith in such a way that the interiors of the two facilities are connected to one another. In a closed position, the individual closing flap has a seal on its circumference for sealing off an associated passage orifice. At least one of the two cooperating closing flaps has, on its circumference, a groove which is delimited on both sides by annular legs. A first leg delimits the groove toward the interior of the respective facility and extends near to the sealing surface of the passage orifice. The second leg is radially shortened relative to the first leg.

Abstract: An air passage switching system includes a case forming an air passage, and a butterfly door for opening and closing the air passage. The door includes a door body, a rotation shaft for rotating the door body, and a seal member attached to the door body. A link member is connected to a first end of the rotation shaft, and the first end of the rotation shaft is rotatably held in a shaft receiving portion of the case through the link member. A first cylindrical portion is formed in the door body concentrically with the rotation shaft at an outer peripheral side of the first end, and a second cylindrical portion protruding to a side of the door body is formed in the case. The first cylindrical portion and the second cylindrical portion are engaged so that a small gap is formed between an outer peripheral surface of the second cylindrical portion, and an inner peripheral surface of the first cylindrical portion and an end of the seal member.

Abstract: A seating ring having a unique surface designed to engage with the convex outer surface of a valve disc, thereby providing a uniquely tight and bi-directional seal. The seating ring has a first, free end, an angled contact point adjacent to the free end, a convex sealing surface adjacent to the angled contact point, a hairpin curve adjacent to the convex sealing surface, and a second, mounting end.

Abstract: A valve device comprising a body (1), a closure member (2) operated by a shaft (3) guided through a neck (4) in the body (1), and a liner (5) provided with a flange (6) extending along part of the length of the neck (4). The sealing contact between the shaft and the bore may be improved by means of a clamping assembly (7, 8, 9) positioned around the flange (6) in a space (10) in the body (1). The size of the clamping assembly (7, 8, 9) is such that it exerts a force on the flange (6) and thereby on the shaft (3). The clamping assembly (7, 8, 9) is radially and/or tiltably movable in said space (10) relative to the body (1). Said device is particularly suitable for butterfly valves for use with corrosive and/or delicate liquids such as liquid chemicals and liquid foodstuffs.

Abstract: A damper system has a rotatable, damper blade pivotally mounted within a damper body. The inner wall of the damper body has a plurality of inwardly, radially extending pins over which is fitted a generally U-shaped sealing channel. The sealing channel comprises two members each of which is held in compression against the inner wall of the damper body by adjustable hold-down blocks.

Abstract: A corrosion-resistant volume damper apparatus for use in gas- and vapor-handling duct systems, installed between existing external duct flanges without having to custom cut or otherwise modify the duct system or the volume damper itself. The retrofittable volume damper has a housing or framework with an aperture extending therethrough and a corrosion-resistant damper blade having integral pivot arms. The aperture or bore is of a suitable size and shape to match the duct system within which the volume damper is to be installed. The housing preferably comprises a pair of corrosion-resistant plates of suitably rigid materials. The two plates have a series of through holes permitting the two plates to be bolted together with a damper blade to be rotatably sandwiched between the plates such that one of the pivot arms of the damper blade extends beyond the two plates on a plane perpendicular to, and away from, the axis of the bore.

Abstract: A butterfly valve having a valve body with a seat therein and a valve disc carried on a rotatable shaft such that the valve disc can be moved into and away from sealing engagement with the valve body seat is provided with a removable and replaceable seat member forming the valve body seat and a removable and replaceable sealing surface member is mounted on the valve disc which is sealingly engageable with the seat member when the valve disc is moved into sealing engagement with the valve body seat. The valve body seat preferably is sized to be press fit into a recess in the valve body and retained therein without additional fasteners. This butterfly valve can be used in a single, double or triple offset valve and the valve can be attached to a pipe in any conventional manner. The valve seat material and the sealing surface material may be solid metal, a resistant material such as nylon or Teflon.RTM., may have a metal insert or may have a high temperature insert such as graphite.

Abstract: A new gas appliance safety shut-off system for preventing accidents and deaths related to the utilization of gas-fueled appliances by providing a gas-fueled appliance with an integrated valve. The operating handle of the valve is accessible from the front of the appliance housing so that the gas supply to the burning devices on or in the appliance may be turned off quickly and easily. The inventive device includes a hydrocarbon gas-fueled appliance that has a gas supply line located in the external housing of the appliance and at least one burning device. An internal pipe member is fluidly connected to the gas supply line such that all hydrocarbon gas burned by the burning devices of the appliance must pass through the pipe member. A valve is pivotally secured in the lumen of the pipe member to selectively cut off the supply of hydrocarbon gas to all the burning devices of the appliance.

Abstract: Rotatable valve assembly includes a mounting mechanism for rotatably mounting a valve in a housing. The mounting mechanism includes a shaft having an outside end extending through the housing. A conversion mechanism converts fluid pressure in the housing into torque exerted on the shaft. A release mechanism is located outside the housing for preventing rotation of the shaft and valve when the torque exerted on the shaft is below a selected magnitude. A linearizing mechanism converts the forces exerted on the release mechanism by the shaft into a linear force. The release mechanism allows the shaft to rotate when the torque exerted on the shaft and the linear force exerted on the release mechanism exceeds a selected magnitude. A seal is provided for sealing the gap between the valve and the housing in the closed position of the valve.

Abstract: Straight line flow rotary valves with the valve member flow passage (21) turned away from the pipeline flow axis (22), to dispose the valve internals to an access port (50) located downstream on the same flow axis of the valve member (11). Another embodiment is used in place of pipe elbows where the rotary valve internals are accessed through a port (50) on the same flow axis (22) as the upstream pipe. In both valve body embodiments, the flow is turned again, downstream of the valve member (11), to communicate with the connecting downstream piping which, in the first embodiment is along the same axis as the upstream pipe (22), and in the second embodiment, is on a different axis (39), and, is generally 45 or 90 degrees turned from the upstream pipe.In both embodiments the flow turns in a component (12) installed, through the body access port (50). In all embodiments the turning component also services as the pressure boundary access cover over the body opening (50).

Abstract: A metal seal for valves, especially disk valves, for use in pipelines through which fluid media flow. The seal ring has at least one, relatively flexible metal or metal composite seal ring which can be mounted to either the housing or the disk of the valve. The seal ring has a flat attachment section from which a curved, in cross-section generally U-shaped, sealing lip extends which, in the closed position of the valve, engages a metallic seating surface of the latter. The seal ring is attached to the valve without separate mounting elements, such as screws or bolts, by welding a free, radial end of the seal ring to a relatively rigid support ring secured to either the housing or the disk of the valve by shrinking engagement.

Abstract: A damper apparatus which includes a rigid frame mounted on an elongated rod. A sheet material flexible cover closely covers the frame. The frame, cover and elongated rod are inserted within a duct with the ends of the elongated rod protruding through the wall of the duct. The covered frame can be pivoted exteriorly of the duct by pivoting of the elongated rod to any desired position and be caused to remain in that position functioning to restrict the flow of gas through the duct. The flexible cover functions as a sound damper for mounting the sound that is created by moving of the gas through the duct.

Abstract: A clack valve includes a housing having a circumferential groove. A rotatable valve disk is disposed within the housing. A gap of constant width at any axial cross-section through the disk is defined between the valve disk and the circumferential groove of the housing. A valve shaft passes from the rotatable valve disk into the housing. An elastic sealing cup has a passage opening for the valve shaft. The elastic sealing cup is disposed between the circumferential groove of the housing and the valve disk to seal the valve disk and the valve shaft against the housing. The elastic sealing cup has a curved circumferential flange to engage the circumferential groove. The curved circumferential flange has a material accumulation in a region of the passage opening. The material accumulation is created by an increase of a thickness of the curved circumferential flange to a maximum thickness in the region of the passage opening for the valve shaft.

Abstract: A louver damper device for the control of fluid flow within a conduit. The louver damper device includes one or more louvers, wherein each louver is a single-walled pivotable unit. The ends of louvers that are adjacent to one another are designed with coupling legs so that when the device is actuated into a blocking position within the conduit, the louver ends become sealingly engaged so as to form relatively small sealing chambers therebetween. Purge air may then be delivered to the sealing chambers to ensure a complete blocking of fluid movement within the conduit. The louvers adjacent to the conduit walls include end modifications similar to those provided to the intermediate louvers. Alternatively, flexible sealing hubs may be affixed to the conduit walls for engagement with modified ends of those perimeter louvers designed to sweep away any particulate residing on the flexible hubs without affect on the seal between those louvers and the interior conduit walls.

Abstract: A butterfly valve for hot fluid, including: a cylindrical duct; a flap pivotally mounted inside said duct; a shaft attached to said flap so that a rotational torque can be transmitted to the flap; a pin inserted into a peripheral portion of said flap so that the pin is rotatable; and a housing in which the duct, the flap, the shaft, and the pin are installed; wherein the flap is loaded from one end of the shaft via a spring in the axial direction of the shaft, the load is supported by the housing via the pin in the peripheral portion of the flap, and neither of a peripheral portion of a flap where a shaft is attached nor a peripheral portion a flap where a pin is inserted contacts said duct when the valve is fully opened.

Abstract: A butterfly damper for installation in duct work through which air and/or gases will be flowing either under a positive or negative pressure has: an outer cylindrical surface structure made of a fixed strong material; an inner flexible cylindrical surface structure made of a resilient material; a circumferential portion of compressible material, which is always tending to return to the non-compressed form thereof, which is initially compressed between the outer cylindrical surface structure and the inner cylindrical surface structure, whereby the inside diameter of the duct body portion, initially, is uniform throughout the length thereof, and, thereafter, when the initial compressive force becomes less effective, the compressive material expands causing radially inward movement of adjacent circumferential portions of the inner flexible cylindrical surface structure; a blade to be moved across the flow of air and/or gases into sealing contact with the radially inwardly moved circumferential portions of the in

Abstract: A butterfly valve having a valve body with a seat therein and a valve disc carried on a rotatable shaft such that the valve disc can be moved into and away from sealing engagement with the valve body seat is provided with a removable and replaceable seat member forming the valve body seat and a removable and replaceable sealing surface member is mounted on the valve disc which is sealingly engageable with the seat member when the valve disc is moved into sealing engagement with the valve body seat. The valve body seat preferably is sized to be press fit into a recess in the valve body and retained therein without additional fasteners. This butterfly valve can be used in a single, double or triple offset valve and the valve can be attached to a pipe in any conventional manner. The valve seat material and the sealing surface material may be solid metal, a resistant material such as nylon or Teflon.RTM., may have a metal insert or may have a high temperature insert such as graphite.

Abstract: A valve assembly has a valve body (10) which houses a pivotally mounted valve closure member (14) in the form of a valve closure flap secured to upper and lower spindles (16, 17). The valve housing is formed from two sections (20, 22) which are releasably secured together by means of an annular clamp (24) which engages with a peripheral upstanding rib (36) formed by the alignment of a flange (34) on one face of each of the valve housing sections.The valve closure member is located in the vicinity of the junction of the two valve housing portions. The provision of a clamp permits the valve assembly to be dismantled extremely quickly in the event of service or repair of the valve assembly.

Abstract: A valve including a valve body having a centrally disposed aperture, a rotatable shaft, and a valve disc. The disc has a circumference with an outer edge and is disposed about the shaft such that the disc rotates to an open position and a closed position within the aperture. The valve body further includes a body moment arm about the circumference of the aperture, a body annular recess about the body moment arm and an annular seating ring retainer also about the circumference of the aperture. The seating ring retainer includes a retainer moment arm opposing the body moment arm and a retainer annular recess, a portion of which adjoins the body annular recess. An annular seating ring, also disposed about the circumference of the aperture, has a first end including a tip and a sealing surface adapted to contact the outer edge of the disc when the disc is in the closed position.

Abstract: A butterfly valve in which a valve body has a transverse shaft mounted in transverse bores in the valve body. A disc is mounted on the shaft for opening and closing the valve. A groove in the shaft receives a ring that is fastened within one transverse bore, for example by a cover plate that clamps the ring against a shoulder in the transverse bore. The ring may be machined to fit the groove loosely and thus play of the shaft in relation to the valve body is governed by the amount of play of the ring in the groove. Bearings on which the shaft is supported are provided with interior wiper seals, and a lock is provided for locking the shaft to the valve body in case of failure of the shaft, for example in case of failure of the shaft at the disc.

Abstract: A molded plastic take-off collar for joining main and branch ducts in forced air heating, cooling, exhaust and ventilation systems having a tubular member with a first end perpendicular flange, and a second end having gripping beads and a stopping edge for attachment to a branch duct. Molded strengthening ribs are formed at the external intersection of the tube and flange; while truncated rims are formed extending from the inner walls of the tube to positively seat a damper flap wherein opposite sides have two protruding threaded pivot pins, which flap can be flexed for insertion of the pins into two opposite openings in the wall of the tube. The damper flap is a unitary structure with the molded pins and molded strengthening beads therefor. A handle and wing nut are provided for positioning the flap. A flexible double-sided adhesive covered ring facilitates joining of the take-off collar to the main duct.

Abstract: A damper system has a rotatable, damper blade with a peripheral extending generally U-shaped channel edge seal fitted over the damper blade's peripheral edge. The channel edge seal comprises two edge seal members that are held together in tension by two retainers through which extend the damper blade shafts.

Abstract: A butterfly valve comprised of main body, a seating ring installed in the seating ring, and a disk shape valve member rotatably provided in the seating ring. The seating ring has an inside projecting ridge so that circumferential edges of vanes of the valve member come into contact with the side edges of the projecting ridge when the valve member is closed. The outer circumferential surface of the valve member is formed spherically as a whole so that machinery cutting of the surfaces of the valve member can easily be accomplished by a lathe. The seating ring has shaft supporting portions formed in concave surfaces so as to conform to the spherical surface of the valve member. Two vanes of the valve member are located at point-symmetrical positions with respect to shaft receptacles which are provided on the axis line of the valve member and extended tangentially with respect to the shaft receptacles.

Abstract: A butterfly valve having a valve body with a seat therein and a valve disc carried on a rotatable shaft such that the valve disc can be moved into and away from sealing engagement with the valve body seat is provided with a removable and replaceable seat member forming the valve body seat and a removable and replaceable sealing surface member is mounted on the valve disc which is sealingly engageable with the seat member when the valve disc is moved into sealing engagement with the valve body seat. The valve body seat preferably is sized to be press fit into a recess in the valve body and retained therein without additional fasteners. This butterfly valve can be used in a single, double or triple offset valve and the valve can be attached to a pipe in any conventional manner. The valve seat material and the sealing surface material may be solid metal, a resistant material such as nylon or Teflon.RTM., may have a metal insert or may have a high temperature insert such as graphite.

Abstract: There is disclosed a butterfly valve having a body connectable in a flowline and a seat which lines its inner side, and a disc which has stem portions at its opposite ends closely received within openings in the seat and body to permit the disc to be rotated between opened and closed positions. A ring which is restrained from movement with one of the disc and seat in a direction transverse to the stem portions substantially fills a groove in the other of the disc and seat which surrounds each stem portions so as to seal between the seat, disc and such stem portion.

Abstract: A butterfly valve has a disc which is pivotally mounted inside the passage through the housing and movable between open and closed positions. In its closed position, a seal is established between the valve housing and the disc with a seal ring that has a flat portion clamped to the housing with an axially movable pressure ring and an inwardly extending, resilient seal ring portion that engages a conical periphery of the disc. A plurality of threaded, circumferentially spaced-apart locking bolts in a segmented retainer ring attached to the valve housing are tightened against the pressure ring to secure the seal ring to the housing. The locking bolts are disposed in through holes in the support ring. Each through hole includes a threaded portion, which is contiguous with the side of the support ring facing the pressure ring, and an unthreaded section which terminates at the outer side of the pressure ring.

Abstract: A valve including an annular groove in the valve body at the periphery of the valve disc. A fire-safe seal provides a fluid seal between the valve disc and the valve passageway. A seal is disposed in the annular groove having an axial projection for retaining the seal and a sealing surface projecting radially inwardly in the passageway and being engageable by the peripheral edge of the valve disc. This sealing surface has an inverted resilient J-shaped portion. The seal also has a circumferential slot for receiving a metal ring to provide circumferential stability. A retaining ring having a blocking groove extends axially and inwardly thereof for receiving the distal end of the resilient J-shaped portion.

Abstract: A fluid valve has a housing formed by first and second halves which combine at mating surfaces to form a cavity with an inlet in the first half and an outlet in the second half. The mating surface of each half includes a notch extending between an outer edge of mating surface and the cavity, and includes an annular recess around the cavity. A pad is formed on each mating surface between the cavity and the annular recess, and has a groove that forms a bushing when the first and second units are connected. A butterfly valve member is located within the cavity and is mounted on a valve stem. The valve stem has an end that rides in the bushing and a portion that passes through the notches in the housing halves. An annular seal fits within the recesses to prevent fluid leakage between the two housing halves and also seals around the valve stem portion. In addition the butterfly valve member engages the seal in a closed state of the valve.

Abstract: A butterfly valve of the present invention comprises holes formed in the side wall of a housing having a fluid passage, bushings pressed into the holes, a shaft of valve body inserted into the bushings to rotatably support the valve body, a step surface facing the upper stream which is formed at a substantially semi-circular portion on the peripheral wall of the fluid passage, and a step surface facing the lower stream which is formed at another substantially semi-circular portion thereon, the peripheral end surfaces of the valve disc being brought into contact with the step surfaces, wherein the shaft is arranged by being offset to the downstream side with respect to the valve disc.

Abstract: Throttle butterfly, especially a throttle butterfly in an intake channel of an internal-combustion engine which has a throttle butterfly shaft extending concentrically to a central axis. The throttle butterfly as well as the housing surrounding it have sealing surfaces facing one another.

Abstract: A throttle body assembly (10) including a throttle plate (22) mounted in the main bore (16) of the throttle body. Either the throttle plate, the bore or both are pre-sludged around the throttle plate/bore interface, using a sealant (24) that is cured with Ultraviolet energy, in order to maintain better air flow control over the life of the throttle body.

Abstract: An exhaust butterfly in an exhaust conduit of an internal combustion engine is supported by way of bearing journals by positive plug-in connections. To simplify installation, the bearing journals and the bearing sleeves are designed in such a way that, to install the exhaust butterfly, the bearing journals are each pressed completely into the respective bearing sleeves counter to the force of a spring. In the case of a multiflow exhaust line, between adjacent exhaust lines cylindrical transverse passages are provided in each of which a driver is rotatably mounted. At one end, the driver has a recess which is designed as a bearing sleeve and into which the bearing journal of the first exhaust butterfly is inserted to produce a driving connection. The other end of the driver is designed as a bearing journal which is likewise inserted into a recess in the second exhaust butterfly to produce a driving connection.

Abstract: A modular butterfly valve for interupting the flow of particulate articles such as tablets, capsules, pills, and the like that includes a disk member which is selectively operable between an open position and a closed position. The disk member is pivotly carried by a pair of tranverse apertures of an elastomer valve seat. The elastomer valve seat also includes an outside diameter, and a seat portion. The seat portion includes a pair of sealing lips that are cantilevered at a selected angle from one end of the elastomer valve seat. The sealing lips form a first throat portion and a second throat portion. In the closed position, a first of the sealing lips abuts one side of the disk member while a second of the sealing lips abuts a peripheral edge of the disk member. The valve seat is retained between a housing and a removable clamping ring. The housing is configured for a quick connect coupling arrangement with a delivery end of a supply bin.

Abstract: A throttle device having a throttle-flap connection piece which is produced from plastic. For an efficient production of the throttle-flap connection piece form plastic in the plastic injection-molding technique, it is necessary to avoid undesirable shrinkage in the pivoting region of the throttle flap and to seal off the bearing arrangements against penetrating plastic during the injection operation. The throttle device includes an annular insertion part which is arranged in the pivoting region of the throttle flap and which, connected to the bearing arrangements is embedded into the throttle-flap connection piece made form plastic, in order to protect the bearing arrangement against penetrating plastic. The injected-round insertion part is suitable for throttle devices which are made from plastic and which are provided for mixture-compressing spark-ignition or air-compressing auto-ignition internal-combustion engines.

Abstract: Rotatable valve assembly includes a mounting mechanism for rotatably mounting the valve in a housing, the mounting mechanism including a shaft having an outside end extending through the housing. A conversion mechanism converts fluid pressure in the housing into torque exerted on the shaft. A release mechanism is located outside the housing for preventing rotation of the shaft and valve when the torque exerted on the shaft is below a selected magnitude. The release mechanism allows the shaft to rotate when the torque exerted on the shaft exceeds a selected magnitude. A seal is provided for sealing the gap between the housing and the valve in the closed position. The seal has a first portion secured to the housing on a first side of the rotational axis of the valve, a second portion secured to the valve on a second side of the rotational axis, a first transitional portion coinciding with the rotational axis, and a second transitional portion coinciding with the rotational axis.

Abstract: Straight line flow rotary valves with the valve member flow passage (21) turned away from the pipeline flow axis (22), to dispose the valve internals to an access port (50) located downstream on the same flow axis of the valve member (11 ). Another embodiment is used in place of pipe elbows where the rotary valve internals are accessed through a port (50) on the same flow axis (22) as the upstream pipe. In both valve body embodiments, the flow is turned again, downstream of the valve member (11), to communicate with the connecting downstream piping which, in the first embodiment is along the same axis as the upstream pipe (22), and in the second embodiment, is on a different axis (39), and, is generally 45 or 90 degrees turned from the upstream pipe.In both embodiments the flow turns in a component (12) installed, through the body access port (50). In all embodiments the turning component also services as the pressure boundary access cover over the body opening (50).

Abstract: A method for adjusting sealing engagement of a valve seat includes providing a valve with a disk in a flow passageway and a valve seal with a seat positioned for sealing engagement with the disk, the valve body and seal together defining a channel having a seal surface lubricated to resist adhesion of the surface and polymeric material, the valve body defining a passage for external access to the channel; injecting liquid polymeric material through the passage into the channel, the polymeric material in the channel pressuring the valve seat toward sealing engagement with the disk; allowing the polymeric material to harden; producing a tunnel through the hardened polymeric material from an external port to the lubricated surface of the seal; and injecting liquid polymeric material under pressure through the tunnel into the channel and causing the liquid polymeric material to flow along the lubricated surface of the seal to collect in selected regions to improve sealing engagement of the seat with the disk.

Abstract: A fluid seal for rotary valves wherein a metal seal ring is adapted to fit within a groove formed within the valve body and a retainer ring for sealing engagement with the sealing surface of a closure member. The metal seal ring has a non-symmetrical cross section with the retainer ring side portion including a shoulder engaging the retainer within the groove and a seating portion extending from the groove for sealing engagement with the closure member. A valve body side portion of the metal seal ring includes a shoulder engaging the valve body within the groove and a non-seating portion extending from the groove for a substantially non-sealing and non-engagement with the sealing surface of the closure member. Engagement of the closure member with the seating portion of the retainer side portion of the metal seal ring torsionally loads the cross-section of the seal ring so as to only enlarge the retainer side portion. A resilient material seal ring can be added to the metal seal ring for desired applications.

Abstract: A butterfly valve having a plastic body with a one-piece valve member formed of thermoplastic elastomer with an integral hub with torque transmitting surfaces which are engaged by lugs on a rigid shaft received in the hub and the shaft is journalled for rotation in the valve body. The valve member has integral thin blade portions extending in opposite directions from the hub with a thickened rim formed about the periphery of the blade with the edge of the rim preferably chamfered. The preferred butterfly member has integral stiffening ribs extending centrally from the hub along the blades to the rim.

Abstract: An EGR valve is well-suited for use in a diesel engine by employing a butterfly-type valve operated by a torque motor. Sealing of the butterfly blade to the wall of the passage through the valve body utilizes a sealing ring that is mounted in a groove of the passage wall. The blade and the sealing ring are self-aligned at assembly, and the groove is cooperatively defined by two body segments that are fitted axially together to capture the sealing ring. Two additional rings are used between the sealing ring and the sides of the groove. In certain embodiments, the axis of the passage in the vicinity of the groove is straight; in others, it has a 45 degree offset so that portions of the axis to opposite sides of the groove are non-collinear.

Abstract: A damper valve includes a base, a valve element pivotally mounted on the base and adjustable valve seat portions on opposite sides of a pivot axis, the valve seat portions being positioned on opposite sides of the blade. Each valve seat portion includes a stationary member fixed to the base, an adjustable element movable relative to the stationary member, and bolts fixing the adjustable element to the stationary member. In addition, adjustment devices are provided for moving the adjustable element toward the valve element to provide a precise fit along the entire length of the valve seat.

Abstract: A seat ring is resiliently fitted into upper and lower main bodies of a butterfly valve divided in a horizontal direction of piping so as to prevent a fluid from being leaked from the butterfly valve.

Abstract: A valve to monitor the level of fluid in an above ground storage tank while the tank is being filled, cutoff the flow of fluid when the tank is in a full condition, and as long as the filling pressure is on the valve the valve will remain cutoff even if the fluid level in the tank has lowered. A relief valve to drain the fluid remaining in the filling hose after the filling pressure is off. A sight level indicator to visually show that the tank is in a filled condition. A monitoring node to be used with or without the mechanical cutoff valve in a totally controlled application where the filling person is not responsible for shutting off the filling tank truck, with two switches, one to alert that the tank is near a filled condition and the second to alert that the tank is in a filled condition.

Abstract: A modular butterfly valve includes a disc member which is adapted for selective rotation between an open and a closed position, a housing, a resilient valve seat, and a clamping ring which are held together by a hinged quick coupling ring. The disc member is resiliently suspended by the valve seat which provides a self-centering of the disc member in a direction transverse to a direction of material flow. This butterfly valve further includes at least one means for limiting the displacement of the disc member in a direction which is parallel to the direction of material flow when loads are placed thereon.

Abstract: A valve comprising a valve body having a first end, a second end, and a through opening forming a fluid flow passage and a wall surrounding a portion of the fluid flow passage, the fluid flow passage defining an axis that is co-axial with the wall. A valve element is rotatably mounted in the valve body, the valve element having an annular, radiused sealing surface and being rotatable around a second axis perpendicular to the first axis passing through the fluid flow passage.