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

Abstract: A design for a ball valve seat uses elastomer and a hard material such as graphite or plastic to seal both high and low pressures. The seat is ring shaped. The seal is positioned on one end. In one embodiment, a rubber O-ring is installed in an outer groove, a plastic ring is installed in the inner groove. In another embodiment, the rubber is chemically heat bonded on the outside diameter of the plastic ring. The combination insert is installed in a single groove. Under low pressure, the rubber ring is compressed by a backing spring and urged against the ball to complete the seal. At higher pressures, the rubber ring is compressed more until the plastic ring contacts the ball. By the time the pressure reaches the initial plastic sealing pressure (below 1000 psig by design) the pressure between rubber ring and plastic ring will be the initial plastic sealing pressure. The low pressure zone will remain low pressure even when the upstream pressure is further increased.

Abstract: A ball valve with seals for the closure part, each seal is profiled in cross section and can be blocked in the closure part with the assistance of annular flanges which can be bent over against the seals.

Abstract: A butterfly valve comprises a butterfly vane including a radial notch. A seal groove is situated in the vane and a seal including tabs is disposed within the seal groove wherein the tabs are adapted to fit within the notch. The tabs are designed to bear against the sides of the notch. The notch is located on the high pressure side of the butterfly vane and in a position such that the butterfly housing limits the radial motion of the tabs when the valve is in the open position.

Abstract: An improved rotary plug valve of the type having a valve body with a fluid inlet conduit and a fluid outlet conduit therein has a rotary plug disposed for rotation in the valve body between an open position and a closed position. In the closed position the plug has a seat seal disposed in a groove in the cylindrical surface thereof which seat seal extends adjacent and surrounds the fluid inlet conduit to seal the inlet conduit against fluid flow. The groove in the plug has a radially inner wall, a radially outer wall and a base wall. The base wall extends at an angle so that the radially outer wall extends more deeply into the plug than the radially inner wall. Preferably the groove and the seat seal have an annular, cylindrical shape. Also preferably the seat seal has a shape so that a pressure space is formed adjacent the base wall of the groove and a gap is formed adjacent the radially inner wall of the groove. Fluid pressure in these urge the seat seal into sealing positions.

Abstract: An improved ball valve for fluids, comprising a body composed of a main and lateral body which defines a longitudinal duct in which there is an obstructing ball having a cylindrical perforation, so that said ball may rotate around a stem joined to it so as to align said cylindrical perforation with said longitudinal duct; said ball being supported by two ring-shaped seats. Whereby the improvements are centered on the independency of the present functions of the seats rings: as ball supports and sealing elements; said rings being left, in accordance with the invention, related solely to the ball-supporting function and introducing a pair of elastic rings (O-rings) which perform the role of sealing elements.

Abstract: A valve for fluids with arrangements of O-rings on the mantle (lateral surface) of the valve stem, which permit the utilization of a variety of geometrical shapes of revolution for the design of the stem. This invention makes possible the reduction of the valve component's manufacturing costs as well as the utilization of the said valve in fluid networks of higher pressures than those possible in traditional valves of this kind. The valve comprises a stem which is a revolution volume and its mantle has at least one perforation with at least two openings, at the same level or at different levels; being said mantle of the stem grooved by one or more furrows which lodge respective O-rings, being the said grooves of a closed loop geometry that surrounds the said mantle so that each groove passes at least over one opening of the perforation or over one virtual opening enclosed between two real openings of the same level of the said perforation.

Abstract: A flow path switching apparatus in an automatic regulating valve includes a base having a fluid inlet and a fluid outlet which are connected to pipes, and an automatic regulating valve portion having an inflow hole and an outflow hole for a fluid to be controlled. The automatic regulating valve portion is pivotally mounted on the base. A pair of inflow and outflow communication paths for causing the fluid inlet to communicate with the inflow hole and causing the fluid outlet to communicate with the outflow hole are formed in the automatic regulating valve portion. The fluid inlet is connected to or disconnected from the fluid outlet in accordance with a pivot position of the automatic flow regulating valve portion.

Abstract: Butterfly valve with a sealing element in elastomeric material with an internal metal reinforcement, made of a substantially tubular outer valve body, with flow pipe connections for fluids at its extremities, in whcih there is a seal in elastomeric material encircling a disc-shaped, internally mobile shutter, equipped with a diametral axis shaft transversal to the valve body axis, protruding out of the same body and bearing the rotation commanding organs, the sealing element being equipped with an inside metal ring, axially extended substantially for the entire length of the same sealing element, and with external sealing reliefs, in correspondence of which there are related seatings in the external body, an ample elastic deformation of the elastomeric material being allowed in the sealed areas, made of a substantially tubular outer valve body, with flow pipe connections for fluids at its extremities, in which there is a seal in elastomeric material encircling a disc-shaped, internally mobile shutter, equippe

Abstract: A simply constructed, inexpensively manufactured rotary valve includes a molded plastic valve body having a seat on which is received a molded plastic rotary valve cover, the underface of the valve cover having an elongate flow groove therein, that groove being encircled by another groove in which a seal is disposed. The ends of the valve cover flow groove can be registered with a circularly spaced pair of openings in the valve body seat to establish communication through the valve between an evacuation space and a vacuum producing means, these seat openings in turn leading to valve body passages that are in communication with respective ones of a pair of integrally formed nipples on the body. The nipples which extend laterally from the valve body, serve as receptive mounting locations for tubes connected to the evacuation space and vacuum producing means.

Abstract: A valve assembly for controlling fluid flow through at least three flowlines comprises a housing having a cylindrical central cavity with at least three ports opening therethrough, the housing further having at least three conduits for making fluid connection between the flowlines and a corresponding one of the ports. A flow control signal is rotatably mounted within the central cavity having at least three radial bores therethrough and intersecting therein for completing a fluid path between selected ones of the ports. A radial seal is supported by the spool and is configured to prevent fluid migration into the central cavity from non-selected ones of the ports. The spool can be positioned to complete a flowpath between any two or any three of the flowlines while the non-selected flowline is positively sealed. The housing and spool are composed of a non-opaque or transparent material to permit direct observation of the fluid passing therethrough.

Abstract: A method of installing a valve seat in a valve body wherein the valve body is provided with an annular, radially inwardly extending rib defining a circular opening through the valve body and the seat member is an annular member having an annular extending web, a first annular flange extending radially outwardly from a first end of the web and a second annular flange extending radially outwardly from a second end of the annular web to thereby define an annular extending, outwardly opening channel which receives the rib in the body, the method comprising rigidly positioning the valve body forming a loop of flexible cord around the seat, the loop being at least partially received in the channel to produce first and second segments of the cord, positioning the seat partially in the body such that a portion of the rib which is received in a portion of the channel, extending the first and second segments of the cord through the valve body out of the second end of the valve body, simultaneously pulling the first and

Abstract: A ball valve is provided in which an outer housing (1) can be left in a pipeline during servicing and a sub-assembly can be removed as a unit from the top of the outer housing (1). The sub-assembly comprises an inner housing (8) in which a ball member 17 is journalled for rotation, and annular seal adaptors (13) for interposition between the ball member (17) and diametrically opposite openings (3) in the outer housing (1). The seal adaptors (13) are such that they can be easily withdrawn outwardly from the withdrawn sub-assembly to reveal the ball member 17 and the seal adaptors for inspection without having to remove the ball (17) itself. The seal adaptors (13) are also wedged-shaped so that when the sub-assembly is refitted in the outer housing (1), the seal adaptors (13) automatically come into sealing engagement with the ball member (17) and the outer housing (1).

Abstract: A ball valve capable of sealing fluids under high pressure is disclosed. The ball valve includes a valve body having a first internal shoulder and a second internal shoulder. A support ring abuts against the first internal shoulder. A sealing ring having an annular recess extending radially abuts against the support ring. A comb disk spring is positioned within the annular recess, the comb disk spring having an apex biased towards the ball. A fitting having a smooth annular support surface extends into the valve body. Sealing rings, such as a backup ring and an O-ring are placed over the smooth support surface and abut against the shoulder of the fitting. A compression ring is placed over the end of the fitting, abutting against the sealing rings. When the fitting is placed within the valve body, the compression ring abuts against the second shoulder of the valve body.

Abstract: A selector valve for use with a hospital vacuum on position in pressure module to supply vacuum or pressure to a utilization means. The selector valve has two or more positions and includes a positive stop at each of its positions through the use of molded plastic parts that interact together to eliminate springs or other components that are tedious to assemble. The entire selector valve is comprised of a minimum of parts and costly lapped surfaces are eliminated by molding a gasket material to one of the components of the valve. The overall multiposition selector valve is thus inexpensive to manufacture by utilizing a minimal number of plastic molded parts and that are easy to assemble.

Abstract: There is provided a seat assembly adapted to be received in a spool bore of a valve having a fluid controlling member for controlling the flow of fluid through the valve, with the spool bore having a threaded interior portion. The seat assembly includes a first member having, located towards one end thereof, a grooved ring adapted to receive a tool, and a threaded exterior portion which is adapted to threadedly engage the interior threaded portion of the spool bore. The seat assembly further includes a second member adapted to be received in the first member, with the second member having a seat face adapted to contact the fluid controlling member. The first member threadedly moves the second member between a first position where the seat face contacts the fluid controlling member of the valve to a second position where the seat face is remote from the fluid controlling member of the valve.

Abstract: The valve member (8) of a ball valve is retained in the valve housing (1) of the valve between an annular seal (21) and an annular retainer (22) which is mounted through one of the branches of the valve housing. The annular retainer (22) is secured in the valve housing (1) by being pressed into said housing and in the valve housing projecting means (23) are provided for engaging the annular retainer. A well defined and optimum sealing pressure is achieved between the valve member (8) and the annular seal (21). According to a method of mounting the valve, the retainer is pressed through a branch and beyond projecting engagement means until the pressing-in force reaches a predetermined value corresponding to the sealing pressure aimed at.

Abstract: An eccentric plug valve having a resilient annular ring seating surface surrounding the inlet to the valve and a metal ring, matching the resilient annular ring, embedded in the sealing face of the eccentrically mounted valve plug.

Abstract: A valve structure is provided having a housing with an open top valve chamber and inlet and outlet passages on opposite sides of the valve chamber forming a through passage with the valve chamber through said housing, a generally spherical radius valve seat on each passage at the valve chamber, a bonnet removably covering said valve chamber, a stem extending through said bonnet generally axially of the valve chamber, a pair of generally spherical radius closure discs in the valve chamber sealingly adapted to engage the valve seats, a disc carrier for each disc in the valve chamber, each disc carrier having a through passage in a plane transverse to the plane of the disc providing full flow therethrough from the inlet to the outlet passage when the valve is in opening position, an eccentric means provided on the stem and engaging each disc carrier for selectively moving the discs into and out of engagement with the valve seats and a guide between the bonnet and at least one of said disc carriers guiding the di

Abstract: A ball valve comprising a housing having a cylindrical bore extending inwardly from the exterior and defining a valve chamber with inlet and outlet passages connected from the exterior of the housing to the chamber. A ball valve member is positioned axially in the chamber and has a cylindrical operating stem extending axially of the bore into a position exterior of the housing. Positioned within the chamber is a mass of resilient packing material which surrounds the ball and substantially fills the chamber. Adjustable means are provided for applying a compressive load to the packing to cause it to sealingly engage the inner walls of the chamber and the exterior of the ball member. The adjustable means include a rigid circular gland member closely received in the bore and extending transversely thereof in engagement with the packing. A circular opening in the gland member closely surrounds the operating stem and disk spring means are positioned on the gland member on the side opposite the packing.

Abstract: A butterfly valve having a composite, reinforced seat, the valve having a one piece body defining a radially inwardly extending annular rib, the valve seat being a U-shaped annular member of a generally resilient material and having a radially outwardly opening channel which engages the rib of the valve body to provide an interlocking engagement between the valve seat and the valve body, the seat including a series of generally U-shaped structural members made of a material more rigid than the resilient material of the seat, the U-shaped member being bonded to the seat, the U-shaped members being spaced sufficiently to permit distortion of the seat so that it can be inserted in the valve body.

Abstract: A seal mechanism in a ball valve in which a valve seat made of an elastic material such as rubber is enforced under pressure into a seat retaining groove defined with a half-groove formed along the outer circumference on the top end of an inner ring and a half-groove formed along the inner circumference on the top end of an outer ring, and the diameter for the sealing point at the corner on the top end along the inner circumferential surface of the valve seat bulging out of the seat retaining groove to be in press contact with a ball-like valve body is made greater than the diameter for the sealing point at the corner on the counter-top end along the inner circumferential surface of the valve seat facing the side wall on the counter-top end of the inner ring that constitutes said half-groove, is improved for the sealing performance under the high fluid pressure condition such that an inner groove is formed at a part on the counter-top end along the circumferential wall of the inner ring that constitutes the h

Abstract: An improved, soft-seated fire-safe ball valve is disclosed. The ball valve includes a body having a central passageway, a ball member positioned in the passageway, and a pair of radially inwardly extending shoulders in the passageway disposed circumferentially thereof on opposite sides of the ball member. The ball member includes a fluid flow opening therethrough and is mounted for selective rotation between valve open and closed positions to control fluid flow through the valve. An improved seat assembly is provided comprising a rigid reinforcing ring, an elastic seat ring supported by the reinforcing ring and configured for fluid sealing engagement to the ball member, and a deformable, heat resistant secondary seat ring interposed between the elastic seat ring and an associated one of the pair of shoulders. Also, a weir ring may be advantageously received in the seat ring. Upon fire damage to the elastic seat ring, the secondary seat ring engages the ball member to seal the valve.

Abstract: The valve comprises a valve body defining a valve chamber having input and output openings, and housing a rotatable shutter element, traversed by a passage, adapted for selectively connecting the input and output openings. Provided between at least one of the openings and the shutter element, is a sealing seat having a truncated-cone shape with its axis lying in a plane, substantially perpendicular to the axis of rotation of the shutter element and inclined with respect to the axis of the opening. The sealing seat has, in a plane which is perpendicular to the axis of the opening an ellipse portion, placed eccentrically with respect to the axis of the opening, with the eccentricity arranged along the major axis of the ellipse on the part which is opposite with respect to the position of the apex of the cone relatively to the axis of the opening. On the shutter element, a sealing ring is provided, for engagement with the sealing seat upon closing the valve.

Abstract: An improved ball valve and method for assembling same having a main valve body with an axially extending throughbore for the passage of fluids therethrough. A ball having a throughbore is mounted in the valve body passageway and rotatable therein from a first position aligning the throughbore through the ball with the throughbore through the valve body permitting fluids to pass through the aligned throughbores, to a second position wherein the body of the ball seals off the throughbore through the valve body stopping passage of fluid therethrough. The ball is rotatable by a stem keyed to the ball having a shaft extending out of an opening in the valve body, the axis of the opening being normal to the axis of the throughbore through the valve body.

Abstract: A ball valve is disclosed having an improved seat ring particularly adapted for sealing a ball member in an end-loaded or top-loaded valve body. The ball is mounted for selective rotation and limited axial movement in a valve body passageway. The seat rings are disposed on diametrically opposite sides of the ball about valve inlet and outlet openings. Frusto-conical disc springs interposed between each seat ring and an associated valve body shoulder urge the seat rings into engagement with the ball. A rigid reinforcing ring is disposed intermediate of the flexible seat ring for integral movement with the seat ring and for reinforcing the seat ring against collapse under pressure. The reinforcing ring is received in an annular channel about the periphery of the seat ring and preferably comprises a split metal ring in a stressed and expanded condition.

Abstract: A means and method for assuring a tight sealing closure of a valve in a high temperature condition, such as fire, is provided by an expendable link on the downstream side of the valve stem and an intumescent material and piston on the upstream side of the valve stem so that, at an elevated temperature condition, the expendable link gives way to create a tolerance allowing the piston driven by the expanding intumescent material to shift the valve closure element in the direction of the valve seat to accommodate for any deterioration of the valve seal.

Abstract: A valve assembly comprising a valve housing defining an internal valve cavity and a fluid flow passageway, a valve element rotatably received in the valve cavity to control flow through the passageway, one of the valve housing or the valve element defining a seating surface, the other defining a seal member carrying surface, and a seal member carried on the seal member carrying surface on either the valve housing or the valve element for engaging the seating surface and effecting a seal between the valve using the valve element, the seal member being comprised of an intumescent material.

Abstract: A valve assembly comprising a valve housing defining an internal valve cavity and a fluid flow passageway, a valve element rotatably received in the valve cavity to control flow through the passageway, one of the valve housing or the valve element defining a seating surface, the other defining a seal member carrying surface, a coating of intumescent material disposed on at least a portion of either the seating surface or the seal member carrying surface, and a seal member carried on the seal member carrying surface on either the valve housing or the valve element for engaging the seating surface and effecting a seal between the valve using and the valve element.

Abstract: An in-line repairable top entry floating ball valve having internal components that are replaceable through an access opening, closed by a valve bonnet, while the valve body is located within a flow line. The valve mechanism is provided with seats which may be of resilient nature and are sealed with respect to the spherical plug member by means of ball/seat spaces having interference sealing engagement between the plug and seats. The ball/seat spacers form sealing surfaces at one axial end for sealing engagement with the spherical plug member and sealing surfaces at the opposite axial end for sealing engagement with the seats and in spherically concentric relation with the plug to thus permit installation and removal of the ball/seat spacers in an arcuate motion about the spherical surface of the plug.

Abstract: A rotary plug valve has a frusto-conical valve plug (4) received within a frusto-conical valve chamber with a tapered valve liner (3) being provided between the two. The chamber and the plug are oppositely tapered so that by axial movement of the plug the valve liner can be wedged into tight sealing engagement with the external surface of the valve plug and the internal surface of the valve chamber. The liner and the valve plug are insertable and removable as a unit from the frusto-conical chamber.

Abstract: A fluid control valve capable of controlling both a hot and cold water supply for an appliance such as a washing machine or the like includes a handle which can be used to simultaneously turn on and turn off both the hot and cold water supply, or allows for independent operation of these same supply lines. The valve has a valve body having a central hollow bore extending through the valve body. Appropriate hot and cold water inlet and outlet nipples are attached to the valve body. A hot water control element fits within the hollow bore on one side of the valve with a cold water control element also fitting within the bore but on the opposite side of the valve. The control handle is located in the middle of the valve and is split, with one side connecting to the hot water control element and the other side connecting to the cold water control element. End caps are utilized to seal the end of the hollow bore so as to contain the control elements therein.

Abstract: A valve assembly for securing a valve cover to a valve body includes a fastening arrangement wherein the fasteners are free of tensile stress. In one arrangement, an outwardly extending retaining skirt is disposed about an access opening in a valve body and a cover member is secured to the retaining skirt. Threaded fasteners extend from the cover member and compressingly engage seals about the access opening.

Abstract: A ball valve having a valve body within which is provided a ball for opening and closing the valve. The ball valve is constructed with bushings and lock rings arranged for ease of assembly and disassembly for inspection of the wear of internal ring seals. An internal lock ring is provided with recesses in an end face for receiving a tool which is part of the operating handle of the valve.

Abstract: A ball valve having an improved relationship between the ball and associated seat rings and an improved seat ring design. The ball is mounted for selective rotation and limited axial movement in a valve body passageway. Seat rings disposed on diametrically opposite sides of the ball about valve inlet and outlet openings each include a ball engaging surface having an arcuate contour. At a relaxed preassembly reference position, the radius of curvature of the ball engaging surface is greater than the radius of curvature of the ball. Frusto-conical disc springs interposed between each seat ring and an associated valve body shoulder additionally urge the seat rings into engagement with the ball. A reinforcing ring disposed at the forward end of each seat ring acts as a rigid bearing surface.

Abstract: A bidirectional valve useful at all temperatures from cryogenic to extreme fire temperatures. The sealing means for the bidirectional valve comprises a metallic sealing element having a pair of spaced sealing lobes defined thereon which are coated with a Teflon compound. A third sealing lobe is defined on the metallic sealing element between the pair of sealing lobes and is constructed solely of metal. A pair of coated sealing lobes further function as wipers to prevent sand, dirt or similar foreign particles from becoming crushed between the valve disc and metallic sealing lobe during the final closing of the valve. When the valve is exposed to fire conditions, the Teflon coated sealing lobes melt out leaving the metallic lobe as the fire safe sealing lobe.

Abstract: A ball valve has a movable upstream valve seat with a metal lip engageable with the valve ball under pressure generated by a bellows section or metal membrane connected between the movable valve seat and the housing. The force of fluid pressure against this moveable valve seat is relieved by operation of a bypass valve connecting opposite sides of this seat. The ball can also have a deformable metal lip.

Abstract: A rotary plug valve has a valve body member provided with a ported plug seat, and a ported plug member rotatably mounted in the valve body member, the plug member being adapted to be rotated between the position where the ports are aligned and the position where the ports are not aligned, thereby opening and closing the valve. One of the valve body member and the plug member is provided in the surface thereof facing the other member with circumferential grooves at both axial end portions of the member. The circumferential grooves receive respective packing "O" rings which form tight seals between the opposing seat surfaces of the valve body member and the plug member. The seat surface of either one of the valve body member and the plug member is provided with a plurality of channels extending in the longitudinal direction of the member at both sides of each port, so as to provide communication between two circumferential grooves.

Abstract: An improved bidirectional sealing element for sealing between two parallel cylindrical surfaces including an inwardly facing outer surface and an outwardly facing inner surface which includes a resilient sealing ring having a central mass, side masses on each side of the central mass, a pair of sealing lips extending radially outwardly and axially away from the central mass to engage and seal against said outer surface and a pair of sealing lips extending radially inwardly and axially away from the central mass to engage and seal against said inner surface, the side masses having a smaller internal diameter than the internal diameter of the central mass so that the side masses engage said inner cylindrical surface on contraction responsive to cooling prior to the engagement of the inner surface of the central mass so that the central mass continues to contract and causes said outer sealing lips to move radially outwardly to maintain their sealing engagement with said outer cylindrical surface.

Abstract: A valve assembly is provided which is particularly suitable for operation and maintenance under extreme environments. It includes a valve body, a ball valve member rotatably mounted within the valve body, a bonnet removably secured to the valve body, and seat retaining asemblies removably secured to the bonnet. Upon removal of the bonnet, the valve member and all internals are also removed as a unit so that they may be serviced at a convenient location. The seat retaining assemblies may include inclined surfaces which seat against oppositely inclined surfaces defined within the valve body. An alignment plate is secured to the seat retaining assemblies to insure proper sealing.

Abstract: A ball valve with an emergency sealing device has a ball having a through hole rotatably mounted within a valve body; ball seat retainers are positioned between the valve body and the ball; ball seats, made of a heat destructible material are mounted on the ball seat retainers and brought into sealing contact with the ball surface, one each to the ball seat retainers; first sealing rings, made of a heat destructible material for functioning under normal conditions are mounted one each on portions of the ball seat retainers where they contact the valve body; annular projection surfaces are provided on each ball seat retainer on parts of the outer circumferences of the ball seat retainers; second sealing rings, made of a heat resistant, flexible material for functioning in case of emergency, are mounted one each on portions of the annular projection surfaces of the ball seat retainers where they contact the inner circumference of the valve body and have pressing mechanisms engaging them, the diameter of the sec

Abstract: A valve seat for use in a ball valve has a shoulder portion, an elastic lip portion, a circumferential non-contact surface, at least one recess and an intersecting portion. The shoulder portion has an engaging surface on its rear surface which contacts the contact surface of the valve casing perpendicular to the flow passage. The non-contact surface is formed on the rear face of the valve seat between the engaging surface and the lip portion and stepped away from the contact surface. The recess is formed in the shape of a groove in the non-contact surface and has its bottom flush with the rear surface of the lip portion stepped away from the contact surface in such a manner that the lip portion is not thinned so as to ensure sufficient strength of the lip portion. The intersecting portion is disposed between the engaging surface and the non-contact surface.

Abstract: A high pressure ball valve including a valve body with inlet and outlet ports, a ball having a passageway therethrough disposed between the ports, and seats between the ball and the ports guidably supporting the ball. Each seat includes a core of polyethersulphone having a ball engaging face with the same radius as the ball, a metal reinforcing ring, and elastomeric seals bonded to the ball engaging face and the face that seats in the valve body.

Abstract: A rotor valve has a set of sealing members or inserts positioned in longitudinal channels formed on the outer surface of a cylindrical rotor. A resilient O-ring snuggly engaged in a groove in the rear surface of each insert urges it against a surrounding rotor chamber formed in a valve body. Due to the resilience of the O-ring, the fluid seal between the rotor and the rotor chamber does not bind due to contaminants or extreme variations in temperature. The sealing inserts are formed of a deformable material. Fluid pressure acting on the inserts deforms them to produce a lateral squeezing force on the O-ring. The interaction between the inserts and the O-ring enhances the integrity of both the seal between the inserts and the surrounding rotor chamber and the seal established by the O-ring itself between the rotor and the insert.

Abstract: Valve in which a flow-control ball and two conical seals are enclosed in a unitary housing, the housing being formed from a tube of malleable metal, the tube being formed to provide two opposed conical portions after the elements have been inserted in the tube.

Abstract: A ball valve is disclosed herein having the portions of the ball surface removed which would be exposed to the fluid in the line when the valve is closed. These portions have bottoms of smaller diameter than the inside diameter of the seats for the ball. Therefore, the surface that has been exposed to liquid while the valve was closed cannot contact the valve seats during the turning cycle of the ball in the valve body either moving from closed to open or open to closed position.

Abstract: A disposable ball valve wherein the union is adhered inside the valve body of the valve housing so as to form the valve chamber for rotatably receiving the ball therein. On the surfaces of the valve body and the union facing the ball, annular grooves of rectangular cross-sections are formed. Within the annular grooves, there are fitted annular seating rings made of polytetrafluoroethylene backed by resilient rubber rings. Thus, the ball and the union do not disconnect from the valve housing by applied fluid pressure, and the sealing performance of the ball valve can be maintained for a long period. In addition, contact surfaces of the valve housing and the tubular caps are formed in the shape of complementary spherical surfaces slidable to each other. Thus, even if the pipelines are deviated from the axis of the flow passage by means of external forces, the ball valve substantially does not receive such excess forces.

Abstract: An ball valve having a body with an open valve chamber therein, passages into the valve chamber, an opening through the top of the body, a boss having an internal recess opposite and aligned with said opening, a closure releasably secured to said body and closing valve chamber, a ball positioned within said chamber and having a passage therethrough, an upper shaft extending through said opening and a lower shaft positioned in said boss recess, rotation of said upper shaft rotating said ball to control flow through said valve, and a sealing assembly positioned to seal against said ball and having resilient seals and metal seal rings for sealing against pressure independent of the direction of flow or pressure even after the valve has been exposed to sufficient heat to destroy the resilient seals of the sealing assembly.

Abstract: A metering device wherein a cylinder is provided with opposite end closures, a piston is shiftable in the cylinder between the end closures, a conduit extends centrally within the cylinder into a valve plug angularly shiftable within the cylinder and located adjacent to one end closure, the valve plug having angularly spaced passageways communicating respectively with opposite sides of the piston upon angular valve shifting, and a gasket extending in sealing relation about the plug and on opposite sides of the passageways to seal the latter from each other.

Abstract: A valve seal for a butterfly valve comprises a U-shaped annular seating member disposed in an annular slot in the valve body and a retaining ring for holding the seating member in place. The seating member cross-section comprises two legs and a bight portion connecting them. A first one of the legs is captured between the retaining ring and valve body to hold the seating member in the slot and enable limited rotational movement of the seating member. A radially inwardly projecting extension on the bight terminates in an annular sealing surface that cooperates with the valve disc. The seating member divides the slot into first and second axial sides in fluid pressure communication with the valve chamber. The seal also comprises an annular open-helical back-up member disposed in an annular cavity formed in the slot by the legs and bight portion of the seating member. The annular cavity is in fluid pressure communication with the second axial side of the slot.