Abstract: An air passage opening and closing device for controlling an air flow for air-conditioning a vehicle compartment which is adapted to reduce an uncomfortable noise generated when the opening degree of a door such as an air-mixing door is small is provided, wherein a plurality of extending portions (7g) are provided on tips of the lip seal (7c). The extending dimension (H) of the extending portion (7g) is more than or equal to substantially 1 mm and less than or equal to substantially 3 mm, the dimension (B) in the width direction orthogonal to the extending direction in the extending portion (7g) is more than or equal to substantially 2 mm and less than or equal to substantially 14 mm, and the gap distance (G) between the adjacent extending portions (7g) is more than or equal to substantially 1 mm and less than or equal to substantially 4 mm.

Abstract: An air-conditioning service plug-type valve includes a valve body having a chamber. First and second openings extend through the valve body. The air conditioning plug-type valve also includes a stem having a plug portion configured for being received in the chamber of the valve body. The stem, when the plug portion is received in the chamber, is rotatable relative to the valve body between a closed position blocking fluid communication between the first and second openings of the valve body and an open position enabling fluid communication between the first and second openings of the valve body. The plug portion includes a fluid blocking portion located immediately adjacent the first opening when the stem is in the closed position. A groove extends into a peripheral surface of the plug portion defining the fluid blocking portion. A seal is disposed in the groove and extends between the plug portion and the valve body. The seal, when located in the groove, is stretched by at least a predetermined amount.

Abstract: An isolation damper capable of forming an airtight or zero-leakage seal. The damper includes an annular frame or frame and a flexible seal member that extends around an inner surface of the frame. The seal member is at least partially embedded or integrated into the frame and includes an exposed surface. The seal member can be a single or multi-component seal member. A rotatable shaft extends across the interior annular aperture of the annular frame, and a blade is coupled to the shaft. The blade that is attached to the shaft is rotatable between closed and open positions. An outer circumferential edge of the blade engages the exposed surface of the seal member when the blade is rotated to a closed position thereby forming an air tight seal.

Abstract: A butterfly valve comprising a valve body having a passage, a valve shaft assembly, a plate, and a tube is provided. The valve shaft assembly comprises first and second shaft portions in opposing spaced relation, an intermediate portion therebetween, and a support plate secured to the valve shaft assembly. The first and second shaft portions rotatably couple the valve shaft assembly to the valve body. The intermediate member forms a chamber in fluidic communication with the passage. The support plate is disposed within the chamber at a closed valve position approximately perpendicular to a direction of fluid flow through the passage. The plate is secured to the support plate and has an inner portion and a flange radially outward of the inner portion. The flange is directed away from the support plate. The tube is disposed within the passage and friction or clearance fit over a portion of the flange.

Abstract: The invention relates to a valve device comprising a valve body defining a fluid flow duct having a throttle element disposed therein and turned about its axis by actuator means via a drive shaft, the throttle element having an internal cavity defined by a circular wall that is open in its bottom portion. The circular wall also presents, over a portion of its periphery, an opening of varying shape so as to define a fluid flow passage in the duct that is variable between a fully-open position in which the opening co-operates in full with the duct, and a fully-closed position in which said circular wall closes the duct. The device further includes an annular sealing gasket disposed in the flow duct, said gasket being in contact with the wall of the internal cavity in the throttle element.

Abstract: A safety angle cock air-bleeding in a multi-mode and having a ball core revolved in a single direction is of switch valves used in a train air brake system.

Abstract: A two-way ball valve (10) for liquid and/or gas flowing media, essentially comprises a valve fitting (12) made up of two connected housing parts (22, 28), in which a ball (18) with a drilling (20) for the media flow and an operating shaft (68) running perpendicular to the drilling (20) is mounted such as to be able to rotate. Furthermore, sealing shells (40, 42) are arranged to both sides of the ball (18) respectively, coaxial to the longitudinal axis (L) of the valve fitting (12), which enclose the ball (18) and completely fill the dead volume (38) between the valve fitting (12) and the ball (18). Said sealing half-shells (40, 42) have a front opening for the operating shaft (38) in the axial direction (L), corresponding to the cross section of the drilling (20) in the ball (18). The sealing half-shells (40, 42) only contact the ball (18) in the region of the front openings thereof, between which a narrow sickle-shaped annular gap is formed.

Abstract: A reduced component wear valve is comprised of a valve body having a passage therethrough and a disc attached to a rotatable shaft. The disc is utilized with a seal forming a gap between the disc and the seal proximate to the rotational axis of the disc. When the disc is in the open position, the seal major axis is greater then the disc diameter and they do not touch. As the disc rotates to near closure, the disc perimeter engages the minor axis of the seal (which is smaller than the disc diameter), and the disc stretches the seal in the minor axis direction thus decreasing the major axis such that the gap is closed. The seal can be pre-formed in an elliptical shape or it can be formed into an elliptical shape by a retaining mechanism. The seal may be a single-piece or a multi-piece assembly press-fit into the valve body. Zero or light disc to seal contact during the majority of the valve disc rotation minimizes valve seal wear and rotational friction.

Abstract: A two-handle valve cartridge has a housing with a snap retainer formed therein, such that a stem can be snap fit into the housing. The snap retainer prevents the stem from inadvertently becoming dislodged after assembly of the valve cartridge. The snap retainer also absorbs tolerances attributable to the stem and the housing and eliminates a clearance between the stem and the housing.

Abstract: A flexible valve for a blood treatment set. A flexible fitting including a first chamber, a second chamber, and a slit barrier connecting the first chamber and second chamber and positioned therebetween. An actuating member is positioned in rotating engagement with the slit barrier that is moveable from a first rotational position, in which the slit is closed, to a second position, in which the slit is open. The flexible valve is attachable to a port of a blood treatment chamber. A user opens the valve by rotating the actuating member from a first position to a second position and closes the valve by rotating the valve from the second position to a first position.

Abstract: A valve assembly includes a valve collar, a rotatable valve control member, and a flexible valve member disposed therebetween. The valve control member and the valve collar are aligned to define an elongated passageway, and the flexible valve member is disposed along the passageway. The valve collar is structured such that at least a portion thereof is capable of radial flexure upon engagement with a mechanism on the rotatable valve control member. One end of the valve member is secured to the valve collar, and the other end is secured to the rotatable valve control member.

Abstract: A fluid control valve utilizes a rotatable plug valve member mounted in a fluid passage to control the flow of fluids. Two segments are placed on each side of the plug valve member within a recess located between the plug valve member and the body of the fluid passage. The outer surface of the segments includes an elastomeric seal and metal annular boss, which acts as a stop to limit deformation of the seal when the valve is closed and under pressure.

Abstract: A gasket ring assembly for use with the rotating ball in a ball valve, the gasket ring assembly including a substantially L-shaped support and a toroidal elastomer gasket. The substantially L-shaped support includes a horizontal section and a vertical section. The horizontal section includes a groove and a tooth for holding the toroidal elastomer gasket in place. The toroidal elastomer gasket is fixedly attached to the substantially L-shaped support and is in direct contact with the outer surface of the rotating ball.

Abstract: A valve seat has an outer surface, a rearward end, a face and a forward end. A passage extends from the rearward end to the face. A valve element slidingly contacts the face. Stress relief flanges are located on the face in areas of high bearing stress. Each flange has a thickness that allows it to deflect slightly to reduce bearing stresses.

Abstract: A rotary valve which can securely shut off a fluid flow without improving a working accuracy of an outer peripheral surface of a valve and an inner diameter portion of a body, and which has a simple and compact structure, wherein a gap is formed between the outer peripheral surface of the valve and the inner diameter portion of the body, a lip portion of seal means attached within a second lead air flow path is brought into contact with the outer peripheral surface of the valve on the basis of an elastic force of a support portion, and the lip portion securely seals between the second lead air flow path and the gap.

Abstract: The invention relates to a valve seal mechanism for a rotatable valve assembly that provides a sealing function between a rotating first valve element and a fixed second valve element as used in a rotary cylinder valve engine. In one embodiment the seal mechansim comprises a substantially rigid sealing frame which surrounds and sealingly engages the periphery of the valve port of one of the cyclindrical valve elements and also sealingly engages a surface of the other cylindrical valve element. In another embodiment, the seal mechanism comprises a resiliently deflectable tubular element of variable diameter, the tubular element being mounted around a first valve element with an aperture of the tubular element being radially aligned with a valve port of the first valve element, the tubular element being biased radially outward of the first valve element.

Abstract: An air passage opening and closing device for controlling an air flow for air-conditioning a vehicle compartment which is adapted to reduce an uncomfortable noise generated when the opening degree of a door such as an air-mixing door is small is provided, wherein a plurality of extending portions (7g) are provided on tips of the lip seal (7c). The extending dimension (H) of the extending portion (7g) is more than or equal to substantially 1 mm and less than or equal to substantially 3 mm, the dimension (B) in the width direction orthogonal to the extending direction in the extending portion (7g) is more than or equal to substantially 2 mm and less than or equal to substantially 14 mm, and the gap distance (G) between the adjacent extending portions (7g) is more than or equal to substantially 1 mm and less than or equal to substantially 4 mm.

Abstract: Methods and apparatus for controlling the flow through a compressor with a valve assembly comprising a rotating body having an outer surface. The rotating body is disposed within a valve cavity in the compressor. A non-contacting seal operates to limit the flow of fluid between the outer surface of the rotating body and the valve cavity. An aperture is disposed through the rotating body. A drive assembly rotates the rotating body such that the aperture intermittently allows fluid to bypass the non-contacting seal as the rotating body is rotated.

Abstract: In a plug-style valve, such as an air-conditioning service plug-style valve, basically including a valve body, a stem, a retainer including a service fitting and a valve core, and a cap, the plug including an intermediate O-ring, between the valve body and the plug, disposed in an intermediate O-ring seal groove of a serpentine shape and having integral first and second O-ring groove portions, the intermediate O-ring being stretched a predetermined amount during installation and defining, therebetween and the valve body and the plug, a closed volume without a primary lateral passage in the plug, with the O-ring stretching preferably being in excess of about 15% to offset refrigerant medium absorption effects that will cause the O-ring to swell, become too large and become loose within its retaining groove, with the single cap including a redundant seal that covers both the valve actuation stem and the service fitting

Abstract: A half ball valve includes a body including cavity having an assembly opening, a stem opening formed at a side of the body opposite to the assembly opening to connect the cavity and the outside, and a first connection hole inclined with respect to an axis of the stem opening. A ball is accommodated in the cavity of the body through the assembly opening to be capable of rotating to switch between an open position at which the first connection hole is open and a close position at which the first connection hole is blocked. A passage is formed in the ball inclined with respect to an axis of the stem opening and is connected to the first connection hole at the open position. A stem connects a control lever outside the body and the ball along the stem opening. A body cap having a second connection hole connected to the passage of the ball is coupled to the body to cover the cavity at the assembly opening side. A packing is interposed between an outer surface of the ball and an inner wall of the body.

Abstract: In a flap valve for controlling a gas flow, with a valve tube that conveys the gas flow and a valve flap, which is disposed in the valve tube, is non-rotatably supported on an adjustable flap shaft, and can be pivoted between an open position that maximally unblocks the tube cross section and a closed position that blocks the tube cross section, in order to produce a high degree of tightness of the flap valve with the least possible torque, the tube end of the valve tube is inclined so that the circumferential tube edge is essentially disposed in a plane extending at an acute angle in relation to the tube axis. The valve flap has an approximately elliptical outer contour and is disposed in the valve tube at or near the inclined tube end so that its tube normal encloses an acute angle with the tube axis. The valve flap and/or the valve tube may be totally or partially embodied so that they can be elastically deformed and/or tilted.

Abstract: A gate valve assembly includes a valve seat and a valve. The valve seat includes a passage opening and a contacting region surrounding the passage opening. The valve includes a groove located on a marginal region of the valve, and a sealing body positioned in the groove. The passage opening is closed by covering the valve over the valve seat, and an upper surface of the sealing body is tightly contacted with the contacting region. Therefore, the valve is prevented from rubbing against the valve seat and producing particles.

Abstract: A combination face and plug seal for use in a balanced pressure valve having a valve housing and a valve plug movable within the valve housing between an open position and a closed position. The seal comprises a main body portion and an engagement portion integrally connected to the main body portion. The seal further comprises at least one primary spring which extends along and at least partially between the main body and engagement portions. Integrally connected to the main body portion is at least one seal leg portion, with at least one secondary spring extending along and at least partially between the main body and seal leg portions. The seal is adapted to be retained within the valve housing, with the engagement portion being forced into sealed engagement with the valve plug and the seal leg portion being forced into sealed engagement with the valve housing when the valve plug is closed or moved from the closed position toward the open position.

Abstract: A valve seal for a rotary valve assembly for use in an internal combustion engine of the piston and cylinder type, the valve seal having a valve body member having a curved annular upper surface conforming to the spherical periphery of a spherical rotary valve, the valve seal having a centrally disposed aperture therethrough defined by an inner circular side wall, the valve body member having an annular receiving groove formed on its curved upper surface for receipt of a lubricating insert ring, the valve body member further having an outer circumferential side wall having a plurality of mounting ribs for the positioning of lateral sealing rings, the valve body member further having a plurality of radial throughbores formed between the inner circular side wall and the outer circumferential side wall, the throughbores being in the same plane as one of the sealing rings.

Abstract: A ball valve particularly suitable for fuel aggregates comprises an outlet channel (12,14) and at least one inlet channel (16). Between the outlet channel (12,14) and the inlet channel (16), a switching element (20) is provided. A sealing element (24,26) contacts the switching element (20). In order to increase the sealing effect, the sealing element (24,26) comprises two sealing lips (28,30) each of which contacts the switching element (20) on a circular line.

Abstract: A multiple port rotary valve for flow switching comprises a rotor (2), a stator (7), a compressor supply (8) and a compressor return (6). Gas is supplied via the compressor supply throughout a switching cycle such that the rotor is lifted away from the stator (7). The valve further comprises a balance ram to counteract the effect of the differential pressure produced by the compressor supply, such that a gas seal is formed at the rotor/stator interface.

Abstract: A ball valve (10) includes a body (A) having a passageway (12) extending therethrough with a ball member (B) disposed in the passageway and mounted for selective rotation between valve open and valve closed positions to control fluid flow through the valve. A pair of flange grooves are provided in the body on opposite sides of the ball. each flange groove extending radially from the passageway. A pair of seat rings (16) are disposed in the passageway on opposite sides of the ball. Each seat ring has a first sealing surface (24) in contact with an outer surface of the ball and a radially extending annular flange or tab (30) received in an associated one of the flange grooves (34). The seat design further includes a pair of annular flange seals (18, 20) each disposed in a respective one of the flange grooves.

Abstract: A ball valve assembly has a lower support, an upper seat, a spherical ball, and linkages for rotating the ball. The lower support has a spherical support surface for the ball. The lower support also has a pair of guides for maintaining alignment of the ball and seat to prevent contact with the linkages. The upper seat has a skirt with a spherical inner surface having grooves for contacting the ball. The skirt and grooves seal and ensure alignment of the ball. The grooves also assist in the retention of lubricant to reduce friction. An optional insert is located in the skirt for low pressure sealing from below and above. Finally, the skirt has a pair of openings to provide relief for the operating links, and flat structures against which the guides of the lower support may restrain rotation of the upper support.

Abstract: A sanitary eccentric seat ring and corresponding method of installation and adjustment is provided. The seat ring includes a body having a first section, a second section, and a body central axis passing through the first and second sections. A first bore is disposed within the first section, and has a first bore central axis concentric with the body central axis. A second bore is disposed within the second section, and has a second bore central axis eccentric to the body central axis. The first section is generally frusto-conical in shape. The second section is generally cylindrical in shape. The first bore within the first section is generally frusto-conical in shape, while the second bore of the second section is generally cylindrical in shape. The seat ring can further include a flange, or other end connection, disposed at one end of the first section. The flange is suitable for mounting the seat ring in a valve body.

Abstract: A valve including an at least partially spherical valve control member and a valve seat where the valve control member is rotatable within a valve housing to obturate and to open at least one opening of the housing by bringing a passage through the valve control member out of and into alignment with the opening. The valve seat includes a radially outer disc portion which lies in a plane transverse to an axis of the opening and a radially inner generally frusto-conical, annular extension free at its narrower-diameter end. The frusto-conical extension is adapted to lie in the opening with a larger-diameter end inward of the housing, and to make substantially a line contact with an at least partially spherical surface of the valve control member when the latter obturates the opening.

Abstract: A sanitary eccentric seat ring and corresponding method of installation and adjustment is provided. The seat ring includes a body having a first section, a second section, and a body central axis passing through the first and second sections. A first bore is disposed within the first section, and has a first bore central axis concentric with the body central axis. A second bore is disposed within the second section, and has a second bore central axis eccentric to the body central axis. The first section is generally frusto-conical in shape. The second section is generally cylindrical in shape. The first bore within the first section is generally frusto-conical in shape, while the second bore of the second section is generally cylindrical in shape. The seat ring can further include a flange, or other end connection, disposed at one end of the first section. The flange is suitable for mounting the seat ring in a valve body.

Abstract: Valve for the control of large-section flows with high operating frequency, and in particular for compressors or the like, comprising a flow aperture (102; 106) and a closure device (3; 8), said flow aperture comprising one or more orifices (102; 106) formed on a fixed body (2; 6) cooperating with said closure device (3; 8) and introduced into the flow channel (1), said closure device (3; 8) rotating with respect to an axis perpendicular to the plane on which said fixed body (2; 6) lies, and being equipped with driving means (5); said closure device (3; 8) is equipped with at least a hollow (123; 138) on the surface facing said fixed body (2; 6) which houses an insert (113; 118), said insert being formed so as to be substantially complementary with said orifice (102; 106) of said fixed body (2; 6).

Abstract: Valve sealing assemblies and methods of sealing a valve engaging member to a valve body. A first seat member is fixedly disposed within a valve body pocket. Two seal rings are disposed between a valve pocket and a pocket insert and a seal ring is disposed between the pocket insert and a seat member to provide a downstream seal. A built-in lip on one of the seat members and an accommodating groove on the other seat member prevent debris from entering the space between the two seat members. A retainer ring on the exterior annular surface of pocket insert seat member retains the pocket insert within valve body. A retainer ring on the exterior annular surface of the seat member retains the seat member within the pocket insert.

Abstract: A ball valve having a valve housing with an inlet and an outlet, a valve body with a bore and sealing bodies, and valve seats which are in sealing planes parallel to one another forming an oblique angle with the inlet and the outlet, and in which the sealing bodies are positioned in body planes parallel to one another, forming a similar oblique angle with the axis of the valve body.

Abstract: The invention relates to a shut-off device (1) comprising a single-part housing (2) insertable in a pipeline, and a butterfly valve (4) swivellable by a drive shaft (3) wherein said butterfly valve (4) in its closed position is sealed off from the housing (2) and from the pipe connection, by a distensible entropy- elastic annular seal (7) of U-shaped cross section to which fluid can be applied, with said annular seal (7) being held by a backup ring on a face (5) of the housing (2).

Abstract: A non-contaminating gas-tight valve for controlling a flow of granular polysilicon. The valve has a spherical valve member formed from single-crystal polysilicon, so that any particles worn from the valve member during use will be non-contaminating polysilicon. The valve member has a passage through which granular polysilicon flows when the valve is in an open position. When rotated perpendicular to the flow, the passage no longer permits movement of granular polysilicon through the valve. The valve member has a smooth finish and is wiped clean when rotated against non-abrasive upper and lower seats, reducing the likelihood of valve member wear. A cavity between the valve member and the valve body allows for removal of excess granular polysilicon from the valve, inhibiting the valve from seizing due to excess granular polysilicon slipping past the upper valve seat and accumulating within the valve. The valve additionally forms a gas-tight seal between an upstream and downstream side of the valve.

Abstract: The present invention provides a throttle body assembly for an internal combustion engine. The assembly includes an insert having an opening and opposing bores arranged transverse to the opening. The insert is constructed of a first material, preferably a metal such as aluminum or magnesium. A throttle shaft is supported by the bores and spans the opening. A throttle blade is disposed within the opening and secured to the shaft. Both the throttle blade and throttle shaft are preferably constructed from a metal so that the seal between the throttle blade and the insert remains dimensionally stable. A body defines an air passageway with the insert at least partially disposed within the body and aligned with the air passageway. The body is constructed from a second material different from the first material, such as a composite plastic. The body may be a portion of an intake manifold.

Abstract: An improved seal for a rotary valve for high temperature and high pressure fluids. A removable seal member adapted for disposition between a valve body and a valve member rotatably disposed in the valve body is provided. In one aspect of the invention, the seal member is adapted so that pressure exerted by the valve is sufficient to induce cold flow in the seal member. In another aspect of the invention, the seal member includes a pair of longitudinally disposed slots.

Abstract: A method and apparatus for controlling fluid flow with a quarter-turn plug valve with seats operated to lift off the sealing surface of the plug prior to plug rotation and to reseat upon completion of plug rotation. One embodiment shown relates to a quarter-turn rotary plug valve having a handle operable through a 90 ° angle and having both upstream and downstream seats which are operated to lift off from the sealing surface of the plug prior to initiation of plug rotation and then reseat upon completion of plug rotation.

Abstract: A process for the integration in a semiconductor chip of an integrated circuit including a high-density integrated circuit components portion and a high-performance logic integrated circuit components portion, providing for: over a semiconductor substrate, insulatively placing a silicidated polysilicon layer that includes a polysilicon layer selectively doped in accordance to a conductivity type of at least the high-performance logic integrated circuit components, covered by a silicide layer; selectively covering the silicidated polysilicon layer with a hard mask; defining gate structures for the high-density integrated circuit components and for the high-performance logic integrated circuit components using said hard mask, the gate structures comprising the silicidated polysilicon layer covered with the hard mask; in a dielectric layer formed over the chip, forming contact openings for electrically contacting the high-density integrated circuit components and the high-performance logic integrated circuit com

Abstract: A rotary valve is provided with an elliptical valve disc that seats against a seal element operatively mounted in an elliptically shaped depression formed in the rigid annular portion of a seal cartridge structure carried by the valve body. Due to the elliptical shapes of the disc and corresponding seating structure, and a conical configuration of the disc periphery, sealing of the valve disc, the integrity of the seal, and the ability of the seal to completely stop the flow of fluid through the valve body are desirably improved. The centering of valve disc relative to the seal cartridge is facilitated by a specially designed disc mounting structure that eliminates any necessity of adjusting the disc along its rotational axis, and a one-piece actuator bracket is removably mounted to the valve body to substantially simplify and reduce the expense of operatively associating an actuator with the valve.

Abstract: An improved ball valve assembly is provided for use on firefighting equipment and other applications. The ball valve assembly includes an improved seal assembly which includes both a load bearing seal element and a soft elastomeric seal element. Both seal elements are held in place by a seat member which is accommodated in a recess provided on the inside surface of the seat housing or valve body. The load bearing seal member provides support for the ball element and serves to wipe or remove debris from the ball element before the ball element engages the soft elastomer seal. As a result, the load bearing seal member removes the stress normally imparted to soft elastomer seals utilized in ball valve assemblies. Further, a lubrication fitting and passageways are provided which enable lubricant to be communicated through the housing and through the seal assembly to the ball element.

Abstract: A valve and method of assembling a valve, the valve being dead-end capable. The valve includes a valve body, a valve member, a seal and a retainer to prevent axial movement of the seal relative to the valve body. In one construction, the valve body defines a first groove extending about a portion of the circumference and an opening communicating with the first groove. The seal has an outer surface engageable with the valve body and defining a second groove. When the seal is positioned in the bore, the second groove is substantially co-extensive with at least a portion of the first groove to define a groove pocket. To prevent axial movement of the seal relative to the valve body, the retainer has a portion positionable in the first groove and an other portion positionable in the second groove. The retainer enters the groove pocket through the opening. Preferably, the valve further comprises a closing member for closing the opening to prevent the retainer from being removed from the groove pocket.

Abstract: An improved metal ball valve for gas comprises a shutter housing chamber in which are provided two opposite sides or flats allowing to define annular recesses in which shutter sealing gaskets are substantially integrally engaged. The shutter weight is advantageously reduced by providing, for example, a bottom flattened portion and an axial hole, the shutter forming moreover, with the valve rod element, preferably a single-piece assembly, the rod-shutter assembly being held in the body of the valve by upsetting thereon the thinned end crown of a collar of the valve body.

Abstract: A valve includes a valve ball and a convex metal valve seat ring that abut along a circle in a metal-to-metal seal. At very high contact forces, the valve ball and/or the valve seat elastically deform to increase the contact area between them and thereby lower the contact pressures applied to the valve ball and valve seat. The valve ball and valve seat are made of materials that do not pressure weld under a wide range of contact pressures. In one embodiment, the valve ball is a stainless steel alloy having a hardness of at least Rockwell 44C and the valve seat is Stellite having a hardness of at least Rockwell 50C. In another embodiment, the valve ball and seat ring are steel alloys having hardnesses above Rockwell 50C.

Abstract: A zone valve for use in a hydronic system, the valve including a ball element through which liquid flows in an axial direction, a valve casing enclosing a ball element, a valve seat in contact with the ball element and the valve casing, the valve seat having a notch to receive an O-ring, an O-ring installed in the notch, and wherein the notch has a surface inclined with respect to the axial direction so that an axial force on the valve seat causes the O-ring installed in the notch to be compressed to improve a seal between the valve seat and an internal bore of the valve casing.

Abstract: An on/off valve for a paintball gun comprises a valve body. The valve body includes a gas inlet to receive a gas from a compressed gas source and a gas outlet to transmit the gas to the paintball gun The valve body also contains a plug cavity for receivingly engaging a plug. The plug includes a flow aperture for transmitting the gas from the inlet aperture to the outlet aperture. An actuator controls the plug position and, hence, a supply of gas through the flow aperture. An o-ring is seated within an exit port of the gas inlet in contact with the valve body and the plug. In operation, the gas has a pressure that exerts a force on the o-ring to maintain it in a sealing engagement with the plug. Movement of the actuator between an “oi” position and an “off” position opens and closes the on/off valve. In an open position, the flow aperture is positioned in communication with the inlet aperture and permits a flow of gas from the inlet aperture to the outlet aperture.

Abstract: A retaining ring for a resilient valve seat carried on a movable valve member is provided in a plurality of segments which may be cast in an investment casting method. The ring segments may be identical in shape and may overlap one another, with threaded fasteners securing the ring segments to the valve member. Concentric grooves may be provided on a face of the ring segments which engage the resilient valve seat to prevent its movement or displacement relative to the valve member.

Abstract: A switch valve 10 is provided with an upper body 14 having a plurality of outlet ports 20A, 20B, and 20C and a lower body housing 16 with inlet port 18. The switch valve includes a ball member 22 which is rotatable within the switch valve body 12 for selective fluid communication between the inlet port 18 and the selected one of the plurality of outlet ports. The ball 22 is rotated by a stem 28, which may be powered by an actuator unit. The upper body 14 includes a substantially dome-shaped seating surface 40 for sealing engagement with the outer surface 38 of the ball. The biasing member 48 biases the ball radially in a direction opposite the ball inlet port 24 to obtain the desired sealing engagement. The biasing member is preferably a Belleville spring 48 having a single wrap design.

Abstract: A valve assembly including a valve housing having a fluid passageway extending through it. The fluid passageway has an inlet portion having a cross-section defined by a substantially annular inlet surface, an outlet portion having a cross-section defined by a substantially annular outlet surface, and an inner chamber portion defined by a substantially annular inner chamber surface, an inner wall, and an outer wall. The inner wall extends inwardly from the inner chamber surface to the inlet surface, and the outer wall extends inwardly from the inner chamber surface to the outlet surface. The inner chamber portion is positioned between and adjacent to the inlet and outlet portions. A valve member is located within the inner chamber portion and is movable between a closed position in which the fluid passageway is blocked, and an open position in which the fluid passageway is not blocked.