Abstract: A novel sealing arrangement for fluid carrying devices and particularly for plug type valves, such as retractable double block and bleed plug valves. The sealing arrangement of the present invention adds secondary and tertiary seals to the conventional packing gland primary seal along the outer surface of the trunnion of such plug type valves. A unique isolated chamber is formed between the secondary and tertiary seals and because of the elastomeric nature of the secondary and tertiary seals, this isolated chamber is bubble tight and thus resists the gradual accumulation of minute leakage, which might otherwise cause false alarms in prior art leakage sensing equipment. Furthermore, the bubble tight feature of a chamber between isolated elastomeric seals, enables purging this chamber for making accurate observations and measurements of true leakage that might otherwise be an environmental hazard.

Abstract: A damper assembly particularly adapted for use in a hot furnace application that includes a damper blade, a housing having a passageway therein dimensioned and configured for receiving the damper blade, and a shaft carrying the damper for rotational movement in the passageway in the housing. A bearing is disposed at one axial extremity of the shaft. The apparatus also includes bearings including a bearing housing member having an interior portion thereof which is spherical section shaped and a bearing member disposed therein having an outer surface that is a spherical section dimensioned and configured for cooperation with the inner portion of the bearing housing member. The inner members has a bore tightly engaging the shaft and the bore has inboard and outboard ends. The inner member includes a counterbore disposed in concentric relationship with the bore at the inboard end thereof. A seal is disposed in the counterbore intermediate the shaft and the walls of the counterbore.

Abstract: A needle assembly for an airless spray gun is provided with a needle which is centerless ground and electropolished to greatly increase life. Further life enhancements are gained by use of a plastic needle bushing in the needle clamp and provision of a specific length to diameter geometry for the needle yields enhanced life as well.

Abstract: A sealing ring for multi-way valves comprising a valve housing and a valve spool able to be moved axially in translation therein. The ring comprises an annular sealing body which possesses radially to the outside possesses a circumferentially extending outer sealing portion for the anchoring thereof in a holding groove or recess and radially to the inside has a circumferentially extending inner sealing portion for providing a sealing action between it and the valve spool surrounded by it, while between the two portions there is a concentric central section. There is a provision for the possibility of axial motion of the inner sealing portion of the part, which is nearer to the valve spool, and furthermore a supporting and stiffening ring is present which is manufactured of a material harder than the material of the sealing body and preferably in a setting, as seen in the radial direction, outside the pivot axis with a coaxial arrangement in the sealing body.

Abstract: A valve sealing apparatus including a valving member, a valve bonnet having a continuous bore that communicates with the valving member, a valve shaft housed within the bore of the bonnet, a primary sealing member positioned in the bore of the valve bonnet which surrounds the valve shaft, and an annular ring positioned between the wall of the valve shaft and the wall of the bonnet for pressing into the face of the primary sealing member, for imparting a downward force on the primary sealing member, in order to prevent horizontal fluid flow between the valve body and the wall of the valve shaft on both the upper and lower faces of the primary sealing member, and a spring associated with the valve bore for maintaining force on the primary sealing member in order to maintain the primary seal.

Abstract: A sealing arrangement for a valve or shaft is disclosed which is designed to respond to movements of a rotatable element in a particular manner and to increase sealing pressure with increasing fluid pressure. The seal undergoes a radial compressive type movement as the pressure within a vessel housing increases between opposed sealing sleeves and this causes an increase in the sealing pressure. This predetermined movement of the seal creates a spring bias in the seal, urging the seal to return to the original, less stressed condition. Preferably, the seal is of a composite structure and a particular component of the intermediate wall section creates this spring bias. This structure has improved operating characteristics and accommodates a wider range of resilient materials to be used for the sealing washer.

Abstract: A valve has an actuating shaft packing assembly for located in a valve enclosure cover for preventing leakage of process fluid into the space between the actuating shaft and the cylindrical sidewall of a bore in the cover. The assembly includes an annular lip located at the axial end of the bore proximal to the fluid control member. The lip extends axially away from the fluid control member. An annular sealing ring is positioned between the lip and the cylindrical sidewall of the bore and formed of a material having a greater coefficient of thermal expansion than the valve body or actuating shaft. The annular ring shrinks when cooled and increases the sealing effectiveness between the sealing ring and the lip for enhanced suppression of fluid flow between the sealing assembly and the cylindrical sidewall.

Abstract: A liveload assembly having a stack guide with a thread on the exterior side wall, a plurality of compressible belleville washers stacked inside the stack guide, and a retainer cap having a thread on an inner side wall for matingly engaging with the stack guide to hold the belleville washers in compression. The gland follower of a fluid flow apparatus is liveloaded by placing the liveload assembly over the bolt extending upwardly from the gland follower. A nut is threaded on the bolt to contact the stack of belleville washers and the retainer cap is unscrewed to a second position on the stack guide and fixed by turning a set screw through a bore in the cap and against the side of the stack guide. Compression of the gland follower is monitored by viewing the relative movement of the stack of belleville washers through a longitudinal slot in the side wall.

Abstract: There is disclosed a butterfly valve having a disc whose stem portions on its opposite ends are closely received within openings in opposite faces of the disc and a seat in the body of the valve. A seal assembly is mounted between the faces in surrounding relation to the stem portions so as to prevent the entry of line fluid into the openings.

Abstract: A gate valve adapted for stem back seating has a stem and bonnet assembly with a rotatable bearing ring to which the stem is releasably fixed during normal gate opening and closing operations. During back seating, the stem is released from the bearing ring and the bearing ring is fixed to the bonnet cap, enabling low torque back seating by rotation of the stem relative to the bearing ring and bonnet cap.

Abstract: A flow control valve for instant on-off operations with gases or liquids at relatively high pressures, such as pressures between 10,000 psi and 100,000 psi. The valve includes a valve body having two or more valve cavities in communication with each other and defined by two end seal assemblies and one or more valve port seal assemblies. An elongated, round, sliding valve stem is centrally located through the seal assemblies. End plugs are used to support the end seal assemblies. The valve stem has fluid passages which are preferably machined at a mid-section of the valve stem. The valve stem is slid parallel to its longitudinal axis to allow or prevent communication between the valve cavities by way of the fluid passage of the valve stem. Two opposite ends of the valve stem are either not exposed to the working fluid or are exposed to different pressures of the working fluid.

Abstract: The present invention provides an improved knifegate valve 1, comprising a body 3, a knifegate 2, a gland box 4, an actuator 9, 10, 11 for inserting the knifegate 2 through the gland box 4 into the valve body 3 and retracting it therefrom, a support 5,6 for supporting the actuator 9, 10, 11 in spaced relation to the gland box 4 and the body 3 and a securing device 20 for securing the gland box 4 in such a way that it is capable of retaining packing material 17 contained therein in a compressed state, wherein the improvement comprises connecting the securing device 6 to the support 5. The support may comprise a bridge 5 supported in spaced relation to the body 3 by pillars 6 connected to the body 3, in which case the securing device may comprise nuts 20 that are capable of cooperating with corresponding external threads on the pillars 6 to secure the gland box lid 14 to its base 13.

Abstract: A multiple thrust range, live loaded packing system for stems and shafts extending into a packing chamber containing a packing ring, and a packing gland engaging the ring and having an outer end portion projecting outwardly of the chamber includes a first thrust member engaging an outer end portion of the gland and a second thrust member spaced from and facing the first thrust member. A spring is mounted between the thrust members for normally biasing the thrust members apart and a spacer is mounted between the thrust members around the spring for establishing a minimum spacing distance between the thrust members. One or more tension members extend between the thrust members to secure the thrust members against the spacer for exerting a selected live load on the packing gland via the spacer, the spring and the first thrust member.

Abstract: A yard hydrant includes a head section with a nozzle, a standpipe and valve housing in traditional hydrant relationship that is constructed and assembled into an integral unit which cannot be disassembled. An operating rod with valve means reciprocates in the standpipe and a valve housing in a well known manner. The rod extends through an enlarged opening formed in the head section for which there is provided a novel two piece gland unit with one piece being a packing gland nut for seal engagement with the operating rod in a well known manner and the other piece being a concentrically larger nut that is removably mounted in said opening in a watertight relationship thereto and in pressing engagement with the packing gland nut. Removal of the gland unit permits the operating rod and any attached components to be quickly and easily withdrawn from the integral unit through the opening in the head section for servicing or repairs.

Abstract: The invention comprises a brace which may be used in a conventional valve assembly for holding the packing gland flange in place while valve components are repacked, repaired, and/or replaced. The brace is put in place around the valve stem and wedged between the gland flange and the yoke. The brace comprises a section of pipe cut into two longitudinal sections and held in place by a pipe clamp. The brace is preloaded by adjustment of jacking screws located between the brace body and the valve yoke. When in place, the brace will hold the valve gland flange together while the gland flange bolts e.g., are replaced. The brace may be left in position if desired as added reinforcement for perhaps a cracked gland flange.

Abstract: A bonnet is provided for operating a quarter turn valve assembly. The valve assembly includes a valve housing formed to include a fluid-conducting passage therein and a quarter turn valve moveable in the passage to regulate flow of fluid through the passage. The bonnet comprises a mechanism for moving the quarter turn valve in the passage, the moving mechanism including an elongated linkage assembly. The bonnet further includes an actuator housing containing the moving mechanism and an adapter block interposed between the valve housing and the actuator housing and configured to provide a mechanism for connecting the actuator housing to the valve housing. The adapter block includes a recess formed therein including a mechanism for receiving the elongated linkage assembly. The bonnet further includes a mechanism for coupling the actuator housing to the valve housing to trap the adapter block therebetween so that the actuator housing, adapter block, and valve housing are held together as a unit.

Abstract: The Eccentrically Rotatable Sleeve Valve is comprised of a housing having a central, vertical bore retaining therein a flexible, tubular sleeve whose central portion can be eccentrically motivated towards or away from a valve seat which is located perpendicularly towards and at the center of said vertical bore, by a core element positioned inside said sleeve and which is capable of being radially displaced by a stem having eccentric cam means and wherein said sleeve is sealingly engaged towards the housing bore by internal, deformable rings motivated radially outwardly by an adjustable bonnet whose means of adjustments are elastically supported.

Abstract: A shutoff valve assembly which includes a valve body comprising a first and second flanged sections disposed on opposite sides of a main flow chamber; a disc seat disposed within the valve body a shutoff disc having a diameter substantially the same as the outer diameter of the disc seat; a disc shaft perpendicularly disposed within a sidewall of the valve body and mechanically affixed to the shutoff disc at a recessed portion of the inner surface of the valve body such that the disc does not restrict fluid flow, provide turbulence or cause a pressure drop while in the open position, the disc shaft having an inner end disposed within the valve body and an outer end disposed external of the valve body, the inner end being a terminal end and the outer end being sealed by means of a packing gland which prevents leakage of fluid from the shutoff valve; a positive spring actuator assembly comprising a lever attached to the disc shaft, a spring connected to the lever which is capable of rotating the disc shaft abou

Abstract: A hermetically-sealed actuator for a rotary valve is provided in which a valve operator is operative to move a stem axially, axial movement of the stem, in turn, producing rotation of a rotary cam member that is operatively connected to rotate a valve spindle, the axially movable stem being hermetically sealed by a bellows mechanism, thus hermetically isolating the rotary cam member from the valve operator, the maximum angular extent of rotation of the cam member being determined by the ramp cam angle and angular extent of helical slots formed in the rotary cam member and which are engaged by trunnions fast with the stem.

Abstract: A bonnet is provided for operating a quarter turn valve assembly. The valve assembly includes a valve housing formed to include a fluid-conducting passage therein and a quarter turn valve moveable in the passage to regulate flow of fluid through the passage. The bonnet comprises a mechanism for moving the quarter turn valve in the passage, the moving mechanism including an elongated linkage assembly. The bonnet further includes an actuator housing containing the moving mechanism and an adapter block interposed between the valve housing and the actuator housing and configured to provide a mechanism for connecting the actuator housing to the valve housing. The adapter block includes a recess formed therein including a mechanism for receiving the elongated linkage assembly. The bonnet further includes a mechanism for coupling the actuator housing to the valve housing to trap the adapter block therebetween so that the actuator housing, adapter block, and valve housing are held together as a unit.

Abstract: A packing system for the operating stem of rotary valves includes first and second packing assemblies engaged with the stem at axially spaced locations. The first assembly is adjustably compressed into sealing engagement with the stem by a first packing nut which carries both the second packing assembly and a second packing nut for adjustably compressing the second packing assembly into sealing engagement with the stem independently of the first packing assembly. The space between the first and second packing assemblies provides a sealed chamber to allow detecting any leakage taking place from the valve chamber through the first stem packing assembly.

Abstract: An engine exhaust gas system includes a conduit for transferring exhaust gas, and a butterfly valve within the conduit for controlling communication of exhaust gas through the conduit. The butterfly valve is mounted on a shaft for pivoting relative to the conduit. The shaft is supported on a bushing in a transverse bore. Leakage through the clearance between the bushing and the shaft acts upon the transverse face of a washer which is freely slidable on the shaft, urging the latter into engagement with a retaining ring carried on the housing to effect sealing of the clearance. As the pressure of exhaust gases increases, the washer is urged more forcefully against the retaining ring, thereby improving the effectiveness of the seal.

Abstract: A control valves includes a body defining a central cavity arranged between a fluid inlet and outwardly-diverging first and second fluid outlets respectively disposed in a common transverse plane. A valve member is arranged in the cavity for rotation between first and second operating positions where a transverse fluid passage through the valve member alternatively communicates the fluid inlet with one or the other of the fluid outlets. To minimize fluid turbulence when the valve member is rotated to an alternate operating position, the fluid passage has a convergent entrance for maintaining the passage in permanent communication with the fluid inlet as well as an oblong exit opening with spaced side walls for enabling the exit opening to temporarily span the first and second fluid outlets as the valve member is turned between its respective operating positions.

Abstract: A sealing assembly, usable with a valve or the like, having a movable shaft within a main housing and controlling a product under a first pressure. A cartridge housing forms a continuation of the main housing. An extension of the shaft extends through the cartridge housing and forms an annulus therewith. Spaced first and second annular seals movably seal the annulus between the shaft extension and the cartridge housing, forming a central sealing chamber. An injector introduces sealing medium into the central sealing chamber under a pressure higher than the product pressure. An accumulator receives excess sealing medium from the central sealing chamber, and can also be associated with monitoring means. Additional annular seals may form additional chambers spaced along the shaft, and these chambers may likewise be used for injection of sealing media and/or monitoring and/or leak detection.

Abstract: A shut-off fitting with a sealing device consisting of a packing casing and a packing gland for the actuation element of the valve has the packing casing including bores that hold the sealing elements. The packing has at least one grooved metal ring with an elastic ring seal on the side facing the actuation element and the bore. As a seat for an elastic ring seal the packing gland features an oblique shoulder which descends toward the center, whereby the ring seal bears the pressure conveyed by a ring element and produced by a spring in the longitudinal direction of the axis of the actuation element.

Abstract: A seal for a shaft in a structural body. The seal is configured to surround the shaft within said structural body. The seal has a flange making a gasket seal with the structural body. The seal has at least one portion distorted and stretched into a tapered configuration and into a tension-related sealing association with the shaft. The seal is made of a memory-retainable material. This memory urges the distorted and stretched tapered portion towards its original configuration, thereby enhancing the sealing association with the shaft.

Abstract: A plastic ball valve having improved valve stem sealing means.

Abstract: An improved live load packing system for sealing an operating valve member in a fluid valve A packing follower includes a base and a guide sleeve adapted for slidable engagement on the operating valve member. A series of Belleville disk springs slidably engage the guide sleeve and maintain concentric mounting during loading of V-type TFE packing members to ensure uniform concentric spring loading and to prevent undesired side loading.

Abstract: The invention is directed to a valve stem double backseat seal wherein the rising stem first engages a non-metallic radial seal and then axially engages the metal backseat shoulder of the valve bonnet.

Abstract: A gate valve is provided having a housing with an interior channel, and a gate which slideably engages the channel. The valve includes a peripheral seal, positioned in the channel to prevent the flow of fluid around the edges of the gate. The valve also includes a transverse seal positioned in the housing to prevent the flow of fluid along the planar surfaces of the gate. The transverse seal includes a generally U-shaped casing disposed about a packing material. The packing material maintains pressure against the casing, thus forcing the casing against the gate. The surface of the casing which is adjacent the gate includes a plurality of raised ribs. The casing includes a bottom member, and two oppositely disposed legs. Each leg has a foot at its distal end, extending away from the packing. Scraping blades are positioned adjacent to each leg member and its corresponding foot. The scraping blades clean debris from the gate, and prevent "rolling" of the seal into the channel.

Abstract: An apparatus for mounting a rotary actuator, having a rotary drive bushing, to a valve stem of a rotary controlled valve having first and second primary seals and a fugitive fluid collection chamber therebetween. The apparatus includes a mounting member disposed between the actuator and the valve which is removably fastened thereto to permit the valve stem to coaxially engage the rotary drive bushing provided in the rotary actuator. O-rings are affixed to flanges that extend from the ends of the mounting member for creating a fluid-tight seal between the mounting member and the actuator and between the mounting member and the valve. The fluid-tight mounting member serves to provide a secondary fugitive fluid collection chamber outboard of the secondary stem seals that is adapted to collect the fugitive fluid that passes the secondary stem seals. A fluid detection device may be attached to the secondary fugitive fluid collection chamber via a port provided in the mounting member.

Abstract: A live-load device for applying a compressive force to packing or gasket material in a valve or pipe conduit junction. The device incorporates spring-washers having resilient blades for imparting a spring force. The spring force is transmitted from each blade through a ball-bearing seated at a selected one of a plurality of contact points along the blade tip. The spring constant of the device is selected by positioning the ball-bearing at a particular one of the contact points. This adjustment capability makes the spring device universally adaptable to a wide variety of valves and conduit junctions.

Abstract: A dual rated live loaded packing system for a valve stem includes at least one thrust load assembly extending between opposing facing elements on a valve body and a packing gland, respectively, for exerting a live load through a gland onto a packing ring contained in a packing chamber around the stem. The thrust load assembly includes an elongated tension member engaging a first one of the ears at one end and a second of the ears at an opposite end. An adjustable nut is threadedly engaged on the tension member having an end facing a surface on the second ear. A spring element is mounted on the tension member between the nut and the second ear for biasing the nut away from the second ear. A cylindrical spacer is mounted on the tension member enclosing the spring element for setting up a minimum value space between the nut and the second ear.

Abstract: A fluid valve includes a packing element surrounding a valve stem extending through the valve body. A packing flange is adjustably supported on the valve body for moving a follower to compress the packing element. A set of disc springs is supported in a cavity internally of the follower between upper and lower parts to compensate for temperature variations causing volumetric changes in the packing element.

Abstract: A fluid control valve which regulates a flow rate of a liquid and, more particularly, which controls a fluid by axially moving a valve body fixed to a valve shaft. The fluid control valve comprises a device for absorbing vibrations of the valve shaft in a direction perpendicular to the axis thereof. More specifically, there is provided a device for exerting a pressing force to lightly press the valve shaft against the inner walls of bearings. Alternatively, the valve shaft may be held between a plurality of elastic plates fixed on the inner surface of a valve casing.

Abstract: A sealing ring made up of nestable elements is constructed by forming a basic cylindrical-frustoconical element having the function of withdstanding the height variations which are liable to be produced by a force exerted on the sealing ring in its axis of revolution. At least one of the nestable elements is formed of expanded graphite and compressed with a constant ratio. The elements are then fitted within each other until a sealing ring of predetermined height is obtained.

Abstract: The present invention includes an improved transverse seal in a gate valve having an assembly portion and a gate. The assembly portion comprises a body, a chest and a top structure or bonnet. The improved transverse seal is located within the chest of the assembly portion and is in constant contact with the gate on each side of the gate. This transverse seal comprises a pliable, longitudinally extending casing of generally U-shaped cross section having a bottom member in contact with the gate and two oppositely disposed leg members. The bottom member is provided with a plurality of raised ribs. A packing material rests within the cavity of the casing, to provide support and pressure on the transverse seal. The oppositely disposed leg members also include longitudinally extending flanges at their distal ends. A rigid scraping blade is placed adjacent to each leg member and rests on its corresponding flange such that one edge of the scraping blade continuously contacts the gate.

Abstract: A valve stem sealing means comprising first and second seal assemblies, the first seal assembly being proximate a valve plug and comprising an expandable ring adapted to be expanded by pressure within the valve to effect a first seal around the valve stem, and the second seal assembly being nearer a free end of the valve stem and comprising a second expandable ring adapted to be expanded by contact with a selectively movable member to effect a second seal around the stem.

Abstract: A sealing arrangement for valve has at least one sealing ring, which has a substantially U-like cross section of its housing ring, which is made up of a plurality of parts which are permanently connected together. In the ring space of the housing ring a single, integral sealing element is mounted so as to be able to yield radially and with the housing ring it constitutes a component which may be uniformly handled. A sealing part thereof extends out of the housing opening of the ring space. A sealing ring of this type may be locked in valve housings in order to provide a sealing action between the valve housing and the moving valve piston. The design of the sealing rings makes them suitable for robotized assembly.

Abstract: A valve sealing apparatus including a valving member (500), a valve bonnet (520) having a continuous bore (540) that communicates with the valving member (500), a valve shaft (542) housed within the bore (540) of the bonnet (520), a primary sealing member (576) positioned in the bore (540) of the valve bonnet (520) which surrounds the valve shaft (542), and an annular ring (580) positioned between the wall of the valve shaft (542) and the wall of the bonnet (520) for pressing into the face of the primary sealing member (576), for imparting a downward force on the primary sealing member (576), in order to prevent horizontal fluid flow between the valve body and the wall of the valve shaft (542) on both the upper and lower faces of the primary sealing member (576), and a spring (564) associated with the valve bore (540) for maintaining force on the primary sealing member (576) in order to maintain the primary seal.

Abstract: A gate valve has a housing which accommodates a valve seat as well as a valving element designed to cooperate with the valve seat. The valving element is mounted on a stem which extends through a cover of the housing and functions to move the valving element into and out of engagement with the seat. A sealing unit for the stem is located adjacent the cover and includes a deep drawn, sheet metal carrier which is mounted on the housing and has a central socket. The stem passes through the socket, and the sealing unit further includes one or more sleeve-like seals which are disposed in the socket and surround the stem. The carrier has a flange which extends outwards from the socket to the housing wall. A corrugation is formed in the flange and abuts the housing wall to thereby center the carrier.

Abstract: A trapezoidal shaped peripheral seal is inserted in a trapezoidal cast peripheral groove in the valve body. A relief cut-out is disposed beneath the peripheral groove. The sealing function is effected by loading the peripheral seal with the gate so as to deflect the seal into the groove a relief cut out which places the seal in a shear mode.

Abstract: A removably securable guide ring (33) for a valve plug (30) in a control valve. The removably securable guide ring (33) also serves as a retainer for a pressure seal ring. The guide ring (33) includes the surface (40) which, upon the guide ring (33) being secured with a valve plug (30), forms a seal ring groove with a stepped portion (34) of the valve plug (30). A seal ring may be installed by removing the guide ring (33) from the valve plug (30), placing the seal ring within the stepped portion (34) of the valve plug (30), and by securing the guide ring (33) with the valve plug (30). As a result, the seal ring is disposed within a seal ring groove formed by a stepped indentation (34) of the valve plug (30) and a surface (40) of the guide ring (33). The guide ring (33) also includes a surface (38) which faces and may abut the inside surface of a valve bonnet (12) during operation.

Abstract: A packing containment assembly for sealing an operating member such as a shaft or stem in a fluid control valve, particularly where PTFE packing is used. A pair of zero clearance anti-extrusion rings of PEEK material are mounted in the shaft with the PTFE packing therebetween. Each ring has an inner diameter slightly less than the shaft outer diameter to form an interference fit. The rings are split with a scarf cut to provide an overlapping joint and enable mounting of the rings on the operating member. A male adapter PEEK ring matches a V-type female packing ring which significantly reduces the amount of PTFE packing needed for a reliable seal. A step cut PEEK zero clearance anti-extrusion ring could be used as well as a fractured carbon ring.

Abstract: An improved live load packing system for sealing an operating valve member in a fluid valve. A packing follower includes a base and a guide sleeve with a non-metallic inner liner adapted for slidable engagement on the operating valve member. A series of Belleville disk springs slidably engage the guide sleeve outer diameter and maintain concentric mounting during loading of V-type TFE packing members to ensure uniform concentric spring loading and to prevent undesired side loading. A window permits viewing the position of the guide sleeve and inner liner during packing loading adjustment so that optimum loading can be attained and maintained when the viewer notes the top edge of the guide sleeve and inner liner is flush with the top surface of the packing flange.

Abstract: A valve stem sealing means comprising first and second seal assemblies, the first seal assembly being proximate a valve plug and comprising an expandable ring adapted to be expanded by pressure within the valve to effect a first seal around the valve stem, and the second seal assembly being nearer a free end of the valve stem and comprising a second expandable ring adapted to be expanded by contact with a selectively movable member to effect a second seal around the stem.

Abstract: An exhaust gas recirculation valve assembly for controlling the recirculation of exhaust gas in an internal combustion engine having a base with an exhaust gas chamber formed therein, a valve assembly having a valve member mounted within the exhaust gas chamber for metering the flow of exhaust gas therethrough, and a valve stem extending out of the chamber through an opening therein, a one piece bearing having upper, intermediate, and lower bearing members for precise positioning of the valve member within the exhaust gas chamber, and a valve stem support assembly for mounting the valve stem relative to an actuator. The intermediate and upper bearing portions operate to deflect exhaust gas, escaping from the exhaust gas chamber and traveling along the valve stem of the valve member, from impinging on the actuator.

Abstract: A poppet valve assembly and method of making same are provided and such assembly comprises a housing; a flow passage in the housing with the passage having a central axis and being adapted to flow a fluid in either direction therethrough; a poppet structure for controlling flow through the passage; a support structure for supporting the poppet structure during movement thereof along the axes; an actuator contact on the poppet structure between its head and stem to enable movement of the poppet structure along the axes; and apparatus for engaging the contact to provide the movement wherein the support structure comprises a cylindrical inside surface provided on the housing and having an axial length generally of the order of several times the particular diameter, and the support structure also comprises a cylindrical outside surface on the stem which slideably engages the inside surface, with the inside and outside surface cooperating and defining sole means confining the poppet structure against movements tra

Abstract: A valve for controlling flow of air from a source of air under pressure such as a compressed air tank comprising an elongate body with first and second ends and first and second sides lying opposite one another. A transverse opening, extending between the first and second sides of the body adjacent its first end, has five coaxial sections of circular cross section having various diameters. The valve further includes a valve stem having a head with a pair of annular grooves in it, each holding an O-ring. The O-ring closest to the inner end of the head is engageable with a valve seat provided in of the transverse opening on inward movement of the stem to close the valve. A knob is attached to the valve stem to facilitate moving the stem. The valve stem with the O-rings in the grooves but without the knob is capable of assembly by inserting the stem into the opening from one side of the body.

Abstract: A dispensing nozzle for a liquid composition having a needle valve and a reinforced tubular seal. The seal has an upper disc-like portion which is secured in place and a lower tubular extension. The tubular extension has an internal tapered bore such that its lower end is narrower than its upper end. The lower end of the bore grips the outer surface of the needle valve and stretches and contracts with its movement. The inner bore of the seal above the lower end is held clear of the needle valve member by a helical spring.