Abstract: A metallic sealing device for a valve including a fluid passage therein and an inner valve positioned in said fluid passage, which comprises an annular groove having nearly T-shape in section formed around the fluid passage by the valve body and a metallic seat holder fixed thereto and a metallic seat arranged in said annular groove and partially projecting into the fluid passage. The metallic seat consists of a metallic sheet having shoulders formed at the sides to limit the projection of the seat into the fluid passage and an extension of one of said sides extending, in the nearly T-shaped groove at the part opposite to the fluid passage toward the other of said sides, thereby promoting the fluid sealing property as well as elastic property of the metallic seat itself and nullifying the dependency of the sealing property on the fluid flowing direction to utilize the function of the fluid pressure at the time of shutting off the fluid passing through the fluid passage.

Abstract: A valve mechanism according to the present invention incorporates at least one movable valve seat that is received within a seat pocket of the valve body and establishes sealing engagement with a movable valve element. An annular universal seat spring formed of a material such as standard carbon steel is deformed from a generally flat configuration to a frusto-conical configuration during assembly of the valve and exerts a force urging the valve seat against the valve element. Depending upon the depth of the seat pocket, the length of the valve seat and the size or thickness of the valve element, the seat spring will be deformed within its elastic limits or beyond the elastic limits of the material thereof, whereupon it will take a permanent set. In either case, the seat spring compensates for tolerance variations and exerts a spring force within a preselected narrow force range to ensure effective sealing capability and low torque operation.

Abstract: A spring assembly (56) for a floating seat ring (40) to urge the seat ring into sealing engagement with the movable valve member. The seat ring is mounted in an enlarged bore portion at the valve chamber and has an annular rear face in opposed relation to a shoulder defined by the enlarged bore portion. The improved spring assembly is mounted in the spring pocket formed between the rear face and the shoulder and has a plurality of undulated annular wave springs (58, 60) about the seat ring. Each pair of contiguous wave springs is staggered so that the front nodes of one wave spring in each contiguous pair is in opposed contact relation to the rear nodes of the other wave spring of each contiguous pair. A flat portion (44A) on the outer circumference of the seat ring is in nested relation to a cooperating flat portion (64) on the inner circumference of the wave spring to maintain the wave spring in an oriented staggered relation.

Abstract: A metal seat assembly (40) for sealing against the sealing surface of a valve member movable between open and closed positions. The seat assembly comprises an outer metallic ring (44) having an inwardly extending metal seal lip (58) hinged to the main body (48) of the ring by a reduced thickness portion. An intermediate metal backing ring (45) has a plurality of spaced fingers engaging the hinged metal lip to urge continuously the lip (58) into tight sealing contact with the valve member, and the backing ring may be adjusted to control the force exerted by the fingers against the metal lip. An innermost metal wiper ring (46) adjacent the flexible metal lip is urged continuously into contact with the sealing surface of the valve member to minimize contact of foreign matter with the sealing lip.

Abstract: A ball valve in which cams (82, 84) are mounted on the ball member (34) to engage spring biased seat rings (30, 32) and cam the seat rings to a retracted position at which the seat rings are retained. The ball valve has a removable cover plate (16) so that the ball member (34) and seat rings may be subsequently removed from the valve body (12) while the valve remains in-line. A removable stop (56) engages and blocks rotation of the ball member past its fully opened and fully closed positions and the cams (82, 84) engage the seat rings only after the stop is removed and the ball member is rotated past its normal stroke and beyond fully opened or fully closed positions.

Abstract: A sealing device for a valve which includes a valve body having a fluid passage and an inner valve for opening or closing said fluid passage, said sealing device comprising a seat packing disposed in a peripheral groove formed in the valve body and partly projecting therefrom into the fluid passage, said seat packing being so constructed that the durability and the fluid shut-off performance are promoted by the combined effect of the fluid pressure in the fluid passage acting against said seat packing and the elastic force of a metallic annular elastic member associated with said seat packing.

Abstract: A hydraulic valve operating circuit for providing positive opening and closing of a downhole safety valve includes shut-off valves which prevent leakage of fuel to the outside environment if a leak should occur in the hydraulic lines which are connected to the hydraulic actuator of the downhole safety valve. A hydraulic control line is connected to the actuator of the safety valve through a normally-closed shut-off valve and the hydraulic control line is also connected to the actuator of the shut-off valve to hold both the shut-off valve and the downhole safety valve open when the hydraulic line is pressurized. Another valve moves to a position to direct the flow of fluid from the safety valve to an accumulator when the pressure in the control line falls below a predetermined value to insure that the downhole safety valve will close properly.

Abstract: A packingless gate valve comprises a housing having two opposed resilient sleeve units that compressibly engage end to end in valve open condition and engage opposite sides of the gate in valve closed condition. Each sleeve unit is a resilient annular body formed at one end with an axially projecting seal lip near the inner periphery and has a bonded stiffening and gate guide element around the outer periphery at the one end. An integral gasket forming flange is formed on the other end of the sleeve body.

Abstract: A valve for opening and closing a fluid conduit of the type having a generally wide cross section, the conduit having a transverse slit therein to allow for movement of a shut-off plate therethrough. The shut-off plate has a spherical shape and defines a center about which the shut-off plate may be arcuately displaced to close the conduit when the plate is positioned within the conduit and to open the conduit when the plate is positioned external to the conduit.

Abstract: The invention provides an annular seating, for valves and cocks comprising a body formed with an axial duct and a movable closure member having a bearing surface associated with the seating. The seating has a metal casing having a hollow cross-section having an anchor part adapted to be held in a recess of the body and an annular closure part having an annular contact surface adapted to co-operate resiliently with the annular bearing surface of the closure member when the seat is in the operating position.

Abstract: An annular valve seat having a resilient metal seal for use in a variety of types of valves provides positive control of fluid flow, with effective metal-to-metal sealing, long life and easy replacement of the seal. The metal seal is in the form of an annular ring comprising approximately one-quarter of a torus that cooperates with the valve's flow control element to establish a metal-to-metal fluid seal which is especially useful at relatively high temperatures. A first edge portion of the torus is held in position against a radial surface of the valve's body by a retainer ring which centers the torus about the flow control element. When the valve is closed the flow control element presses against the outside portion of the resilient metal torus forcing the free edge of the torus against a portion of the retainer ring so that the seal is loaded as a structural span supported at the ends by the valve's body and the retainer ring.

Abstract: This relates to a ball valve of the top entry non-spherical type. A soft metal coating is deposited on that portion of the seat ring which contacts the valve member or ball. The ball and seat assembly is inserted into a valve chamber such that the seat rings are in an unstressed condition. After insertion, the ball is rotated 90.degree. causing the ball to engage the soft metal coating, thereby crushing the soft metal to form a tight seal with the ball. In this manner, the lapping process, generally required when metal seats are employed, is eliminated. Further, the seats may be replaced without replacing the ball.

Abstract: A damper assembly for closure of a duct for conveying hot corrosive gases is disclosed.

Abstract: Disclosed herein are valve seals wherein an annular metallic seal member is retained in an annular recess in a valve body wall, the seal member being resiliently deformable in both axial and radial directions. A resilient annular Belleville spring portion is provided linking an inner sealing portion and an outer flange portion which is sealingly engaged by the valve body. When a valve employing this seal arrangement is closed, differential pressure acting from either direction urges a valve closure member and the seal member in a downstream direction, and forces the seal member and the valve closure member into tighter sealing engagement.

Abstract: Disclosed is a fire-tested butterfly valve having a resilient flexible seat member held in place in a valve housing by being clamped between cooperating surfaces of the valve housing and a valve seat retaining ring insert. Also positioned between the housing and the insert is a fusible washer means which has a lower destruction temperature than that of the annular flexible seat. Further, the insert is spring biased toward the fusible washer and valve housing so that when the valve is exposed to fire the fusible washer melts, the insert is biased toward the housing, and as the annular flexible seat is destroyed by heat, an edge of the insert into contact with the butterfly disc to establish a secondary, metal-to-metal, fire resistant seal.

Abstract: A knife gate for use in pneumatic conveying equipment is the subject of the present invention. The improved knife gate device is constructed utilizing first and second guide plates disposed in spaced apart relationship with a resilient member positioned behind each of the plates. Each plate is characterized by an opening and a planar surface extending on either side of the opening. A reciprocating gate means is disposed between the plates and places the yieldable means under compression. The gate means has an opening and a planar surface extending on at least one side of the opening. The gate means is moveable between an open position wherein all of the openings are aligned and a closed position wherein the planar surface of the gate means moves past the openings in the guide plates to close the latter.

Abstract: Disclosed is a butterfly valve comprising sealing means for a movable valve member in the form of a resilient high temperature destructible sealing ring and a resilient high temperature indestructible seating ring, both of which are normally preloaded into radial sealing engagement with the movable valve member. The high temperature destructible seating ring is the primary seal and the high temperature indestructible seating ring being a backup seal in one direction of flow and the high temperature indestructible seating ring is the primary seal in the opposite direction of flow. Upon destruction of the high temperature destructible seating ring, the high temperature indestructible seating ring is so retained and configured to provide bidirectional seating.

Abstract: A pilot operated switching valve includes a sliding spool that is actuated by pilot pressure to control fluid through the valve to a prime mover. The ends of the spool are exposed to pilot pressure that moves the spool within the valve housing to control fluid flow through passages to and from the spool. The passages are sealed by the spool at selected positions to minimize internal leakage and also to allow the valve to hydraulically lock the prime mover. The switching valve also includes a manual switch that is in fluid communication with a source of pressurized fluid. The manual switch may be manually actuated to direct pilot fluid to one of the two ends of the sliding spool thereby manually actuating the valve.

Abstract: A ball valve assembly in which the ball and valve seats are readily removable from the valve housing, the valve being designed for a high temperature environment. The valve seats cooperate with seat supports and the ball, each of two valve seats comprising a single integral annular fluid-tight metallic spring member disposed between each seat support and the ball. Each metallic spring member comprises a cylindrical bellows length of one or more convolutions, with special ends that are finished in the shape of an internal spherical surface, the same as that of the ball and also that of the inner ends of the seat supports. Ready removal of the ball and valve seats is provided through an opening concentric with the axis of rotation of the ball stem. A flange is disposed in the opening and an annular portion thereof is held in abutting engagement with an annular portion of the valve body.

Abstract: A cam actuable valve wherein annular seats and a valve closure member are axially insertable into a flow passage bore of a valve body. The valve closure member is supported within the flow passage bore by cylindrical trunnions which are partially inserted into the flow passage bore from the exterior of the valve via laterally extending trunnion bores which intersect the flow passage bore and the exterior of the valve body. Cams are formed on the trunnions by forming recesses along chords of the trunnions, the recesses receiving portions of the annular seats when the valve is closed to permit the seats to engage the valve closure member.

Abstract: A sealing device is provided for use in a butterfly valve, ball valve or the like wherein a seal ring is provided which forms a seal in co-operation with a rotating valve member, in which the seal is held in position by an annular pressure member which is impelled towards the body of the valve by springs, and whose inner periphery is adapted to form an emergency seal in co-operation with the valve member, should the seal itself be damaged or destroyed by fire.

Abstract: A slide gate valve for use with a molten metal teeming vessel is provided with elongated resilient supports that may be in the form of leaf springs, or the like, and are operative to resiliently bias the slide plate of the valve against the head plate thereof. The resilient supports are releasably secured to the vessel by linkages that facilitate disassembly of the valve elements for servicing.

Abstract: A sliding gate valve comprising a housing; a sliding gate; an enclosed void space between the gate side edges and the wall of the housing when the gate is in the closed position; and a purge line for injecting pressurized fluid into the void space; improved by gate side edge sealing means comprising a downstream seat mounted on the interior wall of the housing and an upstream seat assembly comprised of a rigid, elongated channel on the interior wall of the housing, parallel to, and upstream of, the gate when in the valve-closed position, the channel having a back wall and at least one side wall, the back wall being substantially parallel to the gate; a rope positioned lengthwise in the channel; the channel having an elongated metal strip flexibly attached along the first of its two long edges to a side wall of the channel so as to sandwich the rope between the back wall of the channel and the rear surface of the metal strip; the seat assembly being positioned such that when the gate is closed the gate's upstr

Abstract: Improved faucet valve of the type used for kitchen sinks, lavatories and the like, wherein structure and configurations are disclosed which permit faucet valve size reduction toward minimums with consequent savings in materials, while at the same time achieving effective flow control and maintaining structural integrity.

Abstract: A ball valve structure has a removable upper cover plate (16) to permit the ball (34) to be removed from the valve body. A separate cam tool (90, FIGS. 8-10) after removal of the cover plate is positioned within the bore of the ball which has been partially rotated from the full open position, and upon a return rotation of the ball with the cam tool therein to a full open position an adjacent spring urged seat ring (58) is cammed away from the ball to a retracted position. A seat ring retainer (82) is then actuated to hold the seat ring in the retracted position. The cam tool is then utilized in a similar manner to cam the other opposite seat ring in retracted position. The ball may then be removed with the seat rings for replacement or repair as desired. The seat rings and seals (70) thereon may be removed and replaced in such manner without removal of the valve from the flowline in which the valve is positioned.

Abstract: A butterfly valve has a valve body with an improved seal assembly mounted in the groove about a flow passage in the valve body. The seal assembly has an outer metal body including a pair of spaced inner legs having outer ends thereof in sealing contact with the outer periphery of a valve disc in the closed position of the valve disc to provide a pair of spaced metal sealing surfaces with the outer periphery of the disc. An elastomeric face seal is positioned between the two spaced inner legs in sealing contact between the spaced metal sealing surfaces with the outer peripheral sealing surface of the valve disc at low pressures.

Abstract: A seat ring assembly in a ball valve or a gate valve provides a primary metal-to-metal seal and a secondary metal-to-synthetic resin seal. The primary seal is accomplished by direct contact between the valve body and the interior conical surface of the seat ring. The secondary seal is made by contact between the valve body and a synthetic resin seat ring insert. The synthetic resin seat ring insert is slidably inserted into an annular groove cut into the conical surface of the seat ring. A compressible seal member is inserted between the bottom surface of the annular groove and the synthetic resin seat ring insert to urge the seat ring insert into contact with the valve body. An additional compressible seal member is inserted into an annular space defined by an inner cylindrical surface of the valve casing and a facing cylindrical surface of the seat ring.

Abstract: The valve assembly tools include a longitudinally expandable member insertable between the seats in a ball valve to forcefully displace the seats into a retracted position in the seat pockets. Seat securing devices are temporarily mounted in the valve body through seat lubrication apertures so they can temporarily engage each of the seat assemblies to secure them in the retracted position. When assembling a valve the seats are displaced to the retracted position by using the longitudinally expandable member and they are temporarily retained in this position by the seat securing devices so the expandable member can be removed. Next the ball valve member is positioned between the seats and then the seat securing devices are released to allow the seats to move into contact with the ball valve member. The seat securing devices are then removed from the valve body and assembly of the valve is continued.

Abstract: A ball or spherical plug valve has a pair of annular metallic seal rings mounted in grooves in the valve chamber around the inlet and outlet passageways of the valve body. Each metallic seal ring is of a one-piece generally uniform angled cross-section to form a leg portion and a free lip portion. The free lip portion extends transversely of the longitudinal axis of the passageways and a substantially continuous line contact is provided between an inner annular edge portion of the free lip portion and the valve member. The lip portion is bent from a free position substantially perpendicular to the leg portion to a substantially frusto-conical position when the valve is assembled so the seal ring acts as a spring to urge itself against the ball valve member to maintain sealing contact.

Abstract: A ball valve seat assembly includes a seat ring for mounting in a ball valve seat pocket and an annular face seal mounts on one end of the seat ring. The resilient annular face seal member is mounted in a groove in the seat member with one end portion exposed to seal against a ball valve member. The annular seal member has an enlarged end portion located in the closed end of the annular groove. An inner wall portion of the seat ring is permanently deformed radially outwardly over the enlarged portion of the seal ring to anchor it in place in the seat ring. Deforming of the inner wall portion is done by swaging the seat ring.

Abstract: A rotary valve disposed in a conveying passage for a powdery or granular material and comprising a valve casing and a valve member of arcuate cross section. In full closed position, the inner peripheral surface of the valve member is directed toward the flow of powdery or granular material to shut off the material flow, but in full open position, the valve member is rotated to permit conveyance of the powdery or granular material through an opening bored therein.

Abstract: This relates to a ball valve of the top entry non-spherical type. A soft metal coating is deposited on that portion of the seat ring which contacts the valve member or ball. The ball and seat assembly is inserted into a valve chamber such that the seat rings are in an unstressed condition. After insertion, the ball is rotated 90.degree. causing the ball to engage the soft metal coating, thereby crushing the soft metal to form a tight seal with the ball. In this manner, the lapping process, generally required when metal seats are employed, is eliminated. Further, the seats may be replaced without replacing the ball.

Abstract: A metallic seat assembly for a gate valve includes an annular seat pocket around the flow passageways to the valve chamber with a metallic annular seat support member rigidly mounted in the seat pocket and a metallic annular seat member movably mounted inside the seat support member and connected thereto by a resilient and flexible annular metallic member. The resilient annular member is secured continuously around its inner and outer perimeters to the seat support member and the seat member respectively and it functions as a spring to bias the seat member toward the gate and as a seal between the seat member and the supporting member. The resilient and flexible member permits axial movement of the seat member relative to the seat support member and also compensates for thermal expansion and contraction of the seat member and the seat support member relative to each other. The metallic seat member has an integral metallic sealing lip extending from an annular groove around the sealing face of the seat member.

Abstract: A rotary valve assembly comprising a housing defining a bore and a valve member mounted for rotation therewithin. The housing defines an opening and the valve member has a port which comes into and out of registration as the member rotates. Lubricant is supplied between the two members and sealing means are provided around the opening in the housing to effect a seal with the valve member. The sealing means includes a sealing element disposed in at least one groove formed in the housing parallel to the axis of the bore, the element being urged into contact with the valve member.

Abstract: An improved seal ring for a ball valve comprising, a metal ring of rectangular cross section, the inner wall of which constitutes part of the axial opening for fluid flow. The upstream face of the seal ring includes means to said seal ring to the housing. The downstream face of the seal ring includes a cylindrical channel, concentric with the axial opening in the valve housing and concentric with the inner wall of the seal ring. The downstream portion of the seal ring is cut at an angle to be substantially parallel to the spherical surface of the ball against which seal is to be made. A seat ring is provided having in cross section a rectangular portion that fits into the cylindrical groove in the seal ring and has a C-shaped portion adapted to house a length of helical spring of the same diameter as the circular interior cavity of the C portion.

Abstract: A rotary plug valve comprised of a valve body having a replaceable liner and valve plug disposed therein. The liner is formed of a pair of axially split complementary liner members, including an upstream liner member and a downstream liner member, having at least one radially elastically deformable retaining member disposed around the periphery thereof.

Abstract: A spherical valve assembly wherein a valve sphere is operatively fitted in position within a fluid passageway through said valve assembly provides an integrally formed stem member having a valve stem and a sustaining stem for said valve sphere, with the integrally formed stem member extending through the valve sphere in supporting engagement therewith. A valve casing is configured to provide a valve stem orifice and a sustaining stem recess wherein the valve stem and the sustaining stem are, respectively, mounted. Valve seat members are located to be urged against the valve sphere which is rotated to open and close the valve. By means of the specific structural orientation of the assembly, particularly the integrally formed stem member including the valve stem and the sustaining stem, an improved valve assembly which may be manufactured more easily is provided.

Abstract: A ball valve seat assembly has a seat ring with an annular recess around an inner annular portion thereof and a resilient seat ring insert mounted in the recess. The seat ring has a radially outwardly extending groove located within the recess. The insert has a radially outwardly extending retaining flange which is engaged in the seat ring groove to anchor the insert. The insert is sufficiently deformable to be radially inwardly deformed temporarily as the flange is moved through the interior of the seat ring and into the groove. The insert has a face portion that is sealingly engaged with the ball valve member. The seat ring and the insert are biased toward the ball valve member and a peripheral seal is provided around the seat ring to seal with the valve body. The seat pocket inner side extends in an overlying relation to a portion of the insert in order to prevent radially inward movement of the insert.

Abstract: In a ball valve, springs urging opposed annular valve seats into engagement with the ball press against heat sensitive material, and bushes between trunnions and sockets in the ball are made of heat sensitive material, so that, in the event of fire reaching a ball valve in a pipeline, and the valve being closed, said heat sensitive material and said bushes disintegrate, and the ball is moved by fluid pressure relative to the trunnions in the downstream direction and pushes the downstream valve seat into sealing engagement with the valve housing.

Abstract: A rotatable valve assembly for controlling the flow of fluids under pressure having a ball valve, a valve seat engaging the valve on opposite sides thereof, one of the valve seats being fixed and the other being movable; with fluid tight seals mounted on the valve seats and engaging the ball valve, the movable valve seat being responsive to the fluid under pressure whereby variation of fluid pressures will compel the movement of the ball valve toward and away from the fixed valve seat to provide a fluid tight seal therealong.

Abstract: A butterfly valve with a conventional resilient seal of rubber or plastic or the like is provided with a secondary seal of a hard, fire resistant material such as metal. The secondary seal is in the form of a split ring which is held in an expanded condition with a fusible link which will melt at some selected temperature such that the secondary seal is normally out of contact with the sealing surface of the butterfly. At the selected temperature, the fusible link melts permitting the secondary seal to contract into a sealing position to replace the resilient seal prior to or coincident with the destruction of the resilient seal by the high temperature.

Abstract: A pressure regulator for breathing apparatus, which comprises a valve cooperating with a seat formed by the end of a nozzle which is axially movable inside a cylindrical chamber, said seat being surrounded by a hollow member of revolution having one end open, in which the valve engages.

Abstract: A bi-directional valve seal assembly comprising a retaining ring communicating with the valve body, the valve body and retaining ring each having a plurality of chamfers to form a recess having an inverted "V" shaped section with a pair of shoulders, and a seat ring movably located in the recess.

Abstract: An apparatus and method for sealing a flow control apparatus, such as a damper, suitable for controlling the flow of fluids in a conduit, especially high temperature gases in flue ducts. The damper includes a closure member which may be removed entirely from the fluid stream by sliding movement through an aperture. Fixedly mounted, cooperating, flat, resilient strips seal the aperture in both the open and closed positions of the damper. Resilient support strips on both sides of the sealing strips control the resistance to flexure of the sealing strips. To prevent damage to the sealing strips as the closure member is withdrawn from the closed position, the sealing strips are allowed to buckle by moving from a condition of concave bending with respect to the interior of the fluid passageway to a condition of convex bending with respect thereto.

Abstract: A plug valve is disclosed having a valve chamber with inlet and outlet flow passages in fluid communication therewith, at least one of the flow passages having a generally cylindrical seat recess formed therein about the flow passage and an axially movable seat assembly disposed therein. The valve includes improved means for biasing the sealing assembly against the plug member and cleaning the space between the sealing assembly and the valve body, namely a plurality of conduits extending from the interior surface of a flow passage to a shoulder surface of its associated seat recess and providing for fluid communication between those surfaces.In the preferred embodiment of this invention, wherein the plug is spherical and rotatably mounted on upper and lower trunnions, the lower end of the lower trunnion is mounted in a trunnion cap, and a limit stop is incorporated therein comprising trunnion.

Abstract: A ball valve where a housing with inlet and outlet ports encompasses a ported gate having spherical surfaces and mounted for rotation about an axis perpendicular to one of the ports. A linear spring assembly seals the ported gate and includes a structure supported seal ring contoured to mate with the spherical surface of the gate and mounted by means of an elastomeric cylindrical element responsive to pressure in the housing to control the contact force between the ported gate and the sealing ring, and with an elastomeric seal ring concentric to the axis of rotation.

Abstract: The invention relates to cocks having a rotating valve and sliding seats. A cock according to the invention comprises a body equipped with fluid-passage ducts, a rotating valve, sliding seats in each duct and, to the rear of each seat, an annular space within which there slides an annular piston which is pushed towards the seat by a pressurized fluid, and which is locked mechanically in this position by screws.

Abstract: A faucet assembly including a spigot having a passageway therethrough is provided. One end of the spigot is open for exit of fluid and the other end is adapted to be rotatably connected to one end of a stationary fitting. The other end of the fitting is adapted to be removably connected to a fluid source. The fitting has a passageway therethrough. A valve is provided and is operable upon rotation of the spigot to a predetermined angular degree relative to the fitting to open and close a flow path for flow of fluid between the fitting and spigot and consequently between a source of fluid and the open exit end of the spigot. Seals are provided on the fitting and spigot to prevent leakage of fluid in the open and closed positions of the valve and to thereby restrict fluid flow.

Abstract: A simple plastic valve cartridge and faucet valve utilizing a concentric metal pipe having an enlarged bore receiving the valve cartridge. The cartridge includes a cylindrical stationary valve member having an axially off-set inlet bore and an opposed axially projecting peripheral rim portion, a rotatable valve member having an inlet port axially off-set for communication with the port of the stationary valve member and a transverse outlet port, and an annular closure member having an axially projecting peripheral rim portion cooperating with the stationary valve member rim portion to define a cylindrical chamber receiving the rotatable valve member. The valve cartridge thus eliminates the requirement of complex machined metal parts while providing the anti-noise and flow features of the prior art.

Abstract: A ball valve is provided including coupled outer casing elements adapted to enclose a rotationally movable valve body having an axial flow passageway therethrough. An annular casing groove having an anular seal member mounted therein is located adjacent each of the opposite ends of the flow passageway for sealingly engaging the movable valve body. Each of the annular casing grooves includes an annular casing wall projecting toward the movable valve body, and each of the seal members includes a flexible leg extending between its associated casing wall and movable valve body. A first surface of each flexible leg engages the movable valve body and a second, opposed surface of each leg is spaced a predetermined distance from its associated casing wall to accommodate a flexion of the flexible leg. Each of the seal members has a secondary sealing surface extending from the first surfaces thereof, and the secondary surfaces are spaced from the movable body a distance less than the foregoing predetermined distance.