Abstract: In a valve on a processing plant in the chemical apparatus field, which has a valve housing, a feed flange and a discharge shaft, together with a valve seat arranged in the vicinity of the feed flange and an associated valve cone, at least the contacting parts of the valve seat and valve cone are made from metal. The inner wall of the valve seat formed as a surface of revolution is provided in the flow direction with two adjacent areas having different diameters and which are separated from one another by an edge. When the valve is closed, only the valve seat edge engages on the circumferential surface of the valve cone. In the first area facing the feed flange, the valve seat wall preferably has a substantially constant radius which continuously increases in the flow direction in the following second area, resulting in particularly reliable closing behavior. This can be further aided by an axially acting spring element.

Abstract: A special control valve plug is disclosed. It includes the integral combination (1) of a spherical radiused or ball type seating surface and (2) a conically tapered flow control tip. When the valve is closed, the spherical radiused plug seating surface provides a positive fluid seal. When the valve is open, the tapered tip provides precise proportionate and continuously variable control of fluid flow.

Abstract: An evacuating device for a plunger molding apparatus including a material cylinder for receiving a blank to be extruded, a ram head slidably engageable in the material cylinder, a hydraulic plunger having a piston connected to the ram head, an evacuating cap provided slidably in an air-tight manner on the piston and having evacuating pipes, and a blowdown valve provided in the ram head for closing and opening an air blow aperture formed in the ram head. The ram head has a flat surface which is in contact with the blank in the material cylinder. An O-ring is arranged in the flat surface of the ram head about the air blow aperture. The blowdown valve consists of a stem and a head which is brought into contact with the flat surface of the ram head through the O-ring when the ram head is being advanced, thereby improving the air-tightness between the ram head and the blowdown valve to prevent the ceramic batch from entering the air blow aperture.

Abstract: The improved choke includes a body with an internal valve chamber, an inlet and an outlet communicating through the body into the valve chamber, a valve seat surrounding the opening of the outlet into the valve chamber, and a valve member mounted within said body to move toward and away from said valve seat to control flow therethrough, means for moving the valve member in said body, the valve member having a stem and a replaceable, wear-resistant tip which is provided with a sleeve insert secured within the stem opening and having internal threads which mate with external threads on the end of the stem, the tip recess includes a groove into which a portion of the sleeve insert is swaged to secure it tightly into the tip.

Abstract: A diaphragm valve which uses a multiple annular metal diaphragm welded about its inner periphery to a valve operating stem. The diaphragm is sealingly clamped about its outer periphery to the valve body and is also clamped about its inner periphery at a location spaced outwardly of the weld to prevent the weld from being subjected to flexure stresses during valve actuation. The actuating assembly is arranged to produce non-rotary, reciprocatory movement of the operating stem through a bonnet mounted rotary actuator. An improved stem tip seal arrangement is also disclosed.

Abstract: An improved, delayed closing plumbing valve of the type having a cartridge with hydraulic fluid in a sealed chamber retained between an upper and lower diaphragm positioned about a longitudinally movable valve stem assembly. The chamber has a one-way piston which divides the chamber into an upper and lower section, and there is a restricted fluid flow path between the two sections. A water shut off gasket is at the base of a valve stem and has a removable gasket ring to permit the replacement of the gasket. The valve seat may also be removable for replacement. The lower diaphragm is provided with a sealed chamber to prevent its degradation by particles in the water. The diaphragms at the upper and lower end of the chamber are retained and sealed to the valve stem by retaining rings having a conical upper end which holds the inner part of the diaphragm against the valve stem. The diaphragms preferably permit the turning of the valve stem with respect to the cartridge without damage to the diaphragms.

Abstract: An improved piston in a check valve which prevents unintentional leakage past the check valve even at low pressures. The piston includes a generally-conically shaped tip and a Teflon ring received in a groove circumscribing the tip. The valve includes first and second passageways with an annular, generally conical seat therebetween. The piston is slidably received in the second passageway such that with fluid pressure applied towards the seat, the ring abuts the seat. The proximal portion of the tip adjacent the ring is inwardly relieved such that the outermost region of the ring is unsupported. When even a low pressure is applied, the ring contacts the seat and flexs or bends towards the relieved proximal portion to provide an effective low pressure seal between the ring and seat.

Abstract: A valve having a rotary valve head with an elastomeric seal attached to the valve head for use in a conduit is disclosed. Separate embodiments for use in a downhole tool and in an accessible surface valve are disclosed. An axially movable actuator tube is engagable with the elastomeric seal to maintain sealing integrity. A valve head with an integrally mounted seal can be actuated by an axially movable camming member or by a lever pivoting about an axis transverse to the conduit. Rotation of the valve head from the closed position aligns a flow passage with the conduit to permit fluid flow.

Abstract: This invention relates to apparatus for transporting articles from one location to another by use of vacuum to suspend them from the underside of a perforated conveyor belt as it moves along the apertured underside of a vacuum box. Embodiments include a vertically actuable flat plate having a compressible bottom surface positioned within the box, whereby upon actuation of the plate downwards, vacuum acting through the apertures of the underside of the vacuum box may be interrupted and a slight positive pressure introduced into the apertures, to effectuate release of suspended articles.

Abstract: A shutoff valve, includes a conical valve seat, and a valve disc movable toward the valve seat in a given direction, the valve disc including a base body covering the valve seat, an annular projection projecting from the base body in the given direction, and a rim formed on the outside of the projection resting against the valve seat in a closed position of the valve, the projection having a region with a given wall thickness in vicinity of the base body and the projection having a free end reinforced to at least 1.5 times the given thickness in the radial direction.

Abstract: A seat coacting with the flapper of a subsurface well safety valve which includes a solid metal annular seat and an annular flexible metal seal in a recess about the solid seat. The flexible seal has a base secured in the recess and a resilient sealing lip which is generally V-shaped in cross section with one end of one of the legs of the V being connected to the base and sealing against the side of the recess and the other leg extending downwardly beyond the solid seat for making contact with the flapper before the flapper seats on the solid seat. The solid seat and the sealing lip are directed downwardly at an angle with the angle of the sealing lip being greater than the angle of the solid seat.

Abstract: A flow increasing insert member for a faucet valve body includes a notch therein. The insert member is sized to fit within a cavity passage in the valve body. The notch and the bottom surface of the cavity passage form a passage therethrough of lesser cross sectional area compared to the cavity passage and has a contoured surface to provide for a laminated and less turbulent flow as compared to the cavity passage. The insert member maintains the advantages of quiet opening of the valve body by not interfering with the function of the specifically shaped inlet through the bottom surface of the valve body. In addition, the insert member allows for restricted flow through a groove about the circumference of the valve body when in a partially open position.

Abstract: A valve stem is reciprocable in an axial bore of a valve body toward and away from the valve seat. The valve plug has integral lip seals for preventing leakage of product out the valve and preventing entry of foreign matter into the valve along the stem. The valve plug has integral seating surfaces having small and large diameters for seating on valve seats having small and larger diameters, respectively and hence the valve plug can be used for different size valves. Steam flows through the bore around the stem to serve as a barrier to entry of foreign matter and to sterilize the zone behind the valve plug and the rearward lip seal.

Abstract: A closure means, for a valve, comprising communicating inlet and outlet ports and a closeable valve seat therebetween, comprising an elongated headless valve stem extending from the valve face through the seat into the inlet port and a resilient washer retained on the stem having an outer diameter larger than the valve seat and an inner hole larger than the stem to allow the washer to ride loose on the stem when the valve is open and close tight on the seat when the valve is closed.

Abstract: A reversing valve construction having a housing provided with a chamber carrying a movable valve member therein that controls ports of a valve seat of the housing through the relative position of a cavity of the valve member relative to the ports, the ports comprising first, second and third ports disposed in spaced apart and straight line relation and the cavity bridging the first and second ports while exposing the chamber to the third port when the valve member is in one position thereof and bridging the second and third ports while exposing the chamber to the first port when the valve member is in another position thereof. The valve member carries a flexible annular sealing member that is disposed between an annular surface of the valve member and the valve seat and surrounds the cavity to seal the cavity to the valve seat while permitting sliding movement therebetween.

Abstract: An air inlet valve for admitting air to the milk drain conduit of a milking cup or collector piece includes a housing secured to the milking cup or collector piece, a diaphragm clamped within the housing, and a valve poppet secured to the diaphragm so as to project from one side thereof. The valve poppet cooperates with a valve seat to form a valve adapted to periodically open and close in response to a pulsator pressure action on the other side of the diaphragm. In its opened state, the valve permits atmospheric air to flow through a connecting conduit to the milk drain conduit such as the interior of a rubber teat cup. The connecting conduit opens through the valve seat surface. The valve poppet can be releasably secured to the diaphragm.

Abstract: An improved valve-strainer body or housing is disclosed wherein a single structure is adapted for use as both a valve housing for globe valves, gate valves, check valves and the like, and also utilized as a casing for a strainer. The housing is sized such that the single housing may be utilized in differing sized pipeline systems from approximately 1/4 inch IPS to 1 inch IPS. The invention also discloses superior means of using the valve body casing in connection with not only threaded pipe systems, but also brazed pipe systems and welded pipe systems. Finally, improvements in the valve assembly structure is also disclosed.

Abstract: There is disclosed metal seals for damper blades, preferably made of sheet metal, as well as the combination of the blade with the metal seal. The damper blade is pivotably mountable and has longitudinally extending edges which are formed to define a groove spaced from and close to the longitudinal edge of the blade and parallel thereto. The metal seal is constituted by a rolled strip of metal formed to include a pair of opposite sides and a bottom defining a U-shaped portion, a hook portion extends inwardly from the free end of one of said sides toward the bottom of the U, and a sealing flap is reversely bent to extend away from the end of the other of said sides. In use, the U-portion of the seal is forced onto the grooved edge until the free end of the hook portion snaps and locks into the groove.

Abstract: A sanitary valve assembly including a valve and a field replaceable gasket. The gasket is formed with a plurality of resilient fingers which conform to a frusto-conical surface of the valve head. The apex end of the valve head frusto-conical surface is provided with a laterally extending shoulder. To assemble the gasket to the valve head, the gasket is pushed onto the valve head so that the fingers deflect as they contact the shoulder. Upon passing over the shoulder, the fingers snap back to their undeflected position to engage the shoulder and retain the gasket on the valve when in the relaxed condition. The gasket fits loosely on the valve head when the valve assembly is in the open position, thereby permitting the assembly to be cleaned in place by flushing washing fluid through the clearances between the valve head and gasket.

Abstract: A needle valve is formed by molding a resilient tip to a rigid body having a tip receiving cylindrical portion or barrel which includes tip retaining means for securing the resilient tip thereto. The tip is then ground until the outer edge of the barrel is engaged to form a resilient single angle or simple conical tip to thereby eliminate distortions which may be present in the molded tip. The tip retaining means comprises either a socket formed into the distal end of the barrel or a mushroom-shaped bayonet projection extending therefrom.

Abstract: A check valve having a removable seat portion with integral flapper (valving means) is disclosed. The seat portion can be removed through a port in the valve body without breaking any connection of the valve body to the associated fluid flow lines. The seat portion can comprise two sections that secure between them sealing means (e.g., an O-ring) for creating a fluid tight seal when the valving member of the check valve is closed against the seat portion. A fluid tight seal is created between the valve seat portion and valve body by tapers on the valve seat that cam against corresponding recesses of the valve body to force the valve seat portion against the valve body.

Abstract: A relief valve assembly for use in backflow preventers having at least one check valve, the relief valve assembly being operable in response to changes in differential pressure across the check valve and in fluid connection downstream of the check valve for discharging liquid therefrom to atmosphere when a backflow condition occurs. The at least one check valve prevents backflow from a service pipe to the supply pipe but when the at least one check valve is fouled, and a backflow condition occurs, the relief valve assembly operates to permit the discharge of the liquid from the service line and prevent contamination of the supply line.

Abstract: A fluid proportioning diverter valve capable or selective flow control between 3 fluid ports incorporated inside an elongated valve housing is provided with a central differential diameter bore passing therethrough between the housing ends and adaptable of receiving slidably an elongated valving stem of which a first end serves as a diverter operating means substantially atop thereof while internally separated by a seal from a second stem end provided with an end seal to divert fluid valved between said ports in any flow ratio desired when the stem becomes shifted axially inside the bore to assume various positions permitting fluid flow between either a first fluid supply port means and a first fluid discharge port means entering the bore via a wall or the first fluid supply port means and a third bottom discharge port means inside a bottom closure means and defined by two extreme stem locations inside thereof while also permitting numerous other stem positions therein to feed both the first side wall and the

Abstract: A solenoid actuated fluid control valve comprises a porting member including a port and a conical valve seat circumscribing the port, and a relatively movable port closing valve element such as a needle valve element including a resilient conical tip. The valve seat and tip are correspondingly tapered and a small annular bead is provided on the resilient tip which provides for initial and preferably total sealing of the valve. Also provided is a suitable stop such as a shoulder on the needle valve element body adjacent the resilient conical tip thereon which engages an opposed surface on the porting member to prevent overcompression of the resilient conical tip and preferably to limit sealing contact to the area of the sealing bead.

Abstract: A large manually operated leak-proof corrosion-proof low-cost shut-off or stop valve for handling high pressure refrigerant liquids and/or gases comprises a valve body formed of two sheet metal hemispheres welded to the periphery of a circular metal valve plate having a fluid passage therethrough and hollow cylindrical metal tubes welded to the hemispheres along the edges of circular holes cut in the hemispheres. One tube on each hemisphere serves for fluid flow. Another internally and externally threaded tube on one hemisphere serves as a valve sleeve through which a rotatable and axially shiftable externally threaded valve spindle extends. The cylindrical inner end of the valve spindle extends into a cylindrical recess in a valve disc which releasably engages a valve seat around a fluid flow passage in the valve plate.

Abstract: A valve assembly has a rigid valve plate with a hole therein for receiving a stem member of the valve actuator. A resilient valve member is mounted on the rigid valve plate by having a peripheral portion overlapping the valve plate. To prevent high pressure gas from entering the hole around the valve stem member through the valve plate to distort the resilient valve member, a solid backup member is mounted inside the resilient valve member adjacent the rigid valve plate.

Abstract: A seal for a valve such as a faucet, has an annular body in which a resilient "O" ring is trapped on the main face by a frusto-conical wedging member. The seal may be a movable valve member (jumper) or may be a separate washer with a portion of the "O" ring protruding from the main face.The main "O" ring functions as the main seal against a flat or ridged valve seat of a faucet or other valve.

Abstract: A method of making a valve construction comprising the steps of forming the housing to have a plurality of valve seat sections disposed in spaced substantially parallel relation, forming a piston unit to comprise a plate and a plurality of pistons disposed in spaced substantially parallel relation and being carried by the plate as an assembly therewith to be axially movable in the housing under the influence of a condition responsive device, disposing the piston unit as an assembly thereof in the housing so that the pistons are respectively received in the valve seat sections, and forming the plate and the pistons so that the pistons can move relative to each other in the assembly thereof while maintaining the substantially parallel relation thereof during the step of disposing the piston unit in the housing so that the pistons will self-align with their respective valve seat sections as the pistons are being received therein.

Abstract: This invention relates to a faucet valve for controlling the rate of flow of fluid from a first conduit usually to a second conduit in which there is provided a valve stem adapted by means of an externally threaded collar to be mounted and retained in a faucet housing and a swivel valve attached to one end of the foregoing valve stem by engaging or gripping means including a plurality of spaced resilient elongate arms disposed circumferentially about the body of said valve and terminating in a series of fingers or detents retained in, but detachable from, an annular groove formed in the valve stem, and contiguous with the button or flattened knob or foot forming the adjacent end of the valve stem. The valve body is modified on one surface to provide a resilient snap-on engagement of the foregoing arms and fingers with the valve stem.

Abstract: An improved poppet valve constructed having a lower member partially mating and fitting within an upper portion is constructed in the shape of a top hat, and with the lower member having a formed shoulder upon which a gasket seats, and being biased thereagainst by means of the flanged upper portion of the valve, with a spring forcing these various components, including the gasket, against the valve seat of the body of the dispenser. An aperture is formed through the base member of the valve, and opens into that location between this base member and the upper portion of the poppet valve, thereby effectively venting any encapsulated air located between these two components, or to prevent the development of any vacuum therein.

Abstract: In a pressure let-down valve comprising a fixed choke and a variable choke means, a silver solder joint between the wear-resistant insert and the retaining ring is replaced by a mechanical joint. The mechanical joint is comprised of a split-locking ring, preferably consisting of two separate segments, fitting into an annular outwardly opening channel in the wear-resistant insert. The split-locking ring is fastened to the retaining ring to lock the wear resistant insert into place.

Abstract: A dispensing valve to be used with a bottle of fluent imaging material. The valve is so structured that it can be assembled more rapidly and easily than existing dispensing valves used for the same purpose. The new valve holds the valve plug and the biasing spring in proper relative position on the actuating spindle without the use of retaining rings and does not require a jig for its assembly.

Abstract: In a device for controlling a steam or gas turbine, including a valve beam for actuating at least two control valves, the valve cones of which are hung by lifting heads at the end of their valve stems resting on seats in the valve beam, the danger of breakage is reduced by making the valve stem with an integral lifting head and screwing it into female threads in the valve cone, the valve cone having on its side facing the lifting head an integral nut neck, at least in the region of the first screw threads.

Abstract: A washerless valve cartridge for a faucet has major components designed to be easily molded in plastics, these major components including a bonnet, a sleeve member and a plunger. The bonnet has a screw thread for retaining it on the open end of a housing having an axial inlet and a side outlet. The sleeve member is arranged to be non-rotatably secured within the housing by the bonnet, and is an integral molding of plastics material including an annular inner end portion forming a valve seat and a cylindrical portion extending from the valve seat and having longitudinal slots which allow liquid flow from the inlet to the outlet via the valve seat. A plunger also of plastic is slidable within the cylindrical portion and has projections which engage in the slots to prevent its rotation, the plunger carrying a steel ball valve member which is capable of seating on the valve seat.

Abstract: A replacement valve assembly with an adjustable sleeve fitting received in the valve port of a conventional faucet body and sealed by a locking nut and gasket. A valve stem is disposed centrally through the fitting and carries a frictionless washer retainer to bias a washer to the valve seat and to freely swivel on the valve stem to reduce wear. An adjustable bushing with an associated jam nut biases a sealing gasket to the valve stem.

Abstract: A nonspill vented closure assembly is provided for a wet cell type of storage battery which normally provides a venting hole to the interior of the battery, and which includes a tiltable weight that lifts a valve to close the vent hole whenever the battery is tilted with respect to the vertical beyond a certain angular displacement, so as to prevent leakage of the liquid electrolyte through the closure assembly. The closure assembly includes a tubular casing which is threaded into the normal fill hole of the battery. A lead weight which constitutes the tiltable mass is supported in the casing. A valve stem connects the lead weight to a valve member, and it serves to move the valve member against an annular valve seat surrounding an orifice in the lower end of the casing whenever the lead weight is tilted. The valve stem includes a ball at its upper end which extends into a cavity in the bottom of the lead weight, and which is held in the cavity by a plastic disc which forms a bearing surface for the ball.

Abstract: A valve for high temperature abrasive service having a body with an inlet connected to a valve chamber and an outlet extending through a valve seat from the valve chamber, a valve stem movable toward and away from the valve seat, a valve member mounted on the valve stem to coact with the valve seat to control flow therethrough, said valve member having an outer sleeve of abrasion resistant material which is supported by annular split springs to prevent rattling of the sleeve and to insulate it from the effects of differential expansion between it and its internal support members. The spring is generally annular in shape with its width extending axially of the sleeve and having sinusoidal waves above and below its circular axis.

Abstract: The valve element and method of making same are characterized by a valve body having at the neck thereof a small radially outwardly projecting annular crimp bead and a resilient tip molded on the body at the neck. To mold the tip, the body is axially aligned and urged into the mouth of an open ended mold to close the cavity therein with the crimp bead engaging and being crimped by the mold wall to effect a tight annular seal about the body periphery thereby to preclude leakage of fluid material introduced in the closed cavity to form the tip, but without the development of substantial pressures in the mold that might cause excessive wear and damage to the mold.

Abstract: A new and improved valve assembly is easily assembled and includes a resilient annular washer. The washer has inner and outer side surfaces dimensioned so that a valve stem presses the inner side surface of the washer radially outwardly to expand the washer into engagement with a hook on a retainer cup. The hook holds the washer against axial displacement relative to the retainer cup under the influence of fluid pressure forces. The retainer cup advantageously engages a shoulder on the valve stem to limit axial compression of the washer.

Abstract: An improved valve facing for one member of relatively sliding gate valve members. More specifically, the improved valve facing has foamed polymeric core and an impervious and solid polymeric outer surface. This combination provides the necessary resilient and deformable characteristics for effecting a long-life seal between the sliding members of the gate valve. When the valve is a drain valve of a fire hydrant most unexpected results are obtained.

Abstract: A pressure medium controlling valve has a valve member with an annular groove being formed in the surface of the valve member directed toward a valve seat. A resilient sealing ring is disposed within the annular groove and is opposed from the valve seat. The side of the annular groove facing toward the pressure medium is cylindrical and is engaged by the end of a resilient sealing lip attached to the outer peripheral surface of the sealing ring. The sealing lip extends angularly outwardly away from the sealing ring and toward the surface of the valve member directed toward the valve seat so that the outer end of sealing lip abuts resiliently against the cylindrical surface of the groove to form a seal therewith. The other side of the annular groove is provided with an undercut which receives a correspondingly shaped portion of the sealing ring.

Abstract: A valve core or insides for a valve device, said core being made primarily of plastic such that its manufacturing costs are considerably reduced, the core being specially configured to allow for substantial air flow through the core while insuring good dynamic sealing.

Abstract: A plastic valve assembly includes a body member and a controller member each having alignable transverse flow passageways and constantly aligned longitudinal flow passageways. The controller member is positioned in the body member for rotatably aligning the transverse passageways. Axially spaced about the exterior of the transverse body passageway are a pair of lands and axially spaced about the transverse controller passageway are a pair of resilient seals. A recess completely surrounds the exterior of the transverse controller passageway with a resilient wiper seal seated in the recess. The controller member is so positioned in the body member that the resilient seals constantly and sealingly engage the lands and the wiper seal constantly and sealingly engages the interior wall of the body member surrounding the transverse controller flow passageway.

Abstract: A flow through check valve having a covered access port and a pivotal clapper member, the valve body and access port cover providing a recess to completely receive the clapper member out of the flow stream such that the clapper member never comes into contact with the access port cover. The clapper member is provided with a modified rabbet cut recess for receiving an O-ring therein which results in a reduction in weight, a reduction of manufacturing costs and ease of replacement of the O-ring.

Abstract: A fuel pressure regulator assembly comprising, a housing, a diaphragm separating the housing into a first and second chamber, the housing has a radial inlet extending to the first chamber and a connector having an axial outlet is mounted in the housing and extends axially into the first chamber. The connector supports a sealing ring in a groove. The diaphragm supports a valve member that is adapted to engage the sealing ring, and a spring in the second chamber urges said valve member against the sealing ring.

Abstract: The present invention provides an improvement in fluid flow control valves which utilize polymeric rubbery materials either as the valve member or the valve seat in the flow control valve. The improvements are obtained by utilizing as the rubbery material for either the valve seat or the valve, a semi-rigid to rigid rubbery material prepared by curing a nitrile rubber with from three to 15 parts of sulfur per 100 parts of rubber. Such cured rubbers when utilized in said application, have been found to overcome the problems exhibited by the rubbery materials heretofore used for such applications.

Abstract: A backflow prevention device is disclosed which includes a pressure differential relief valve. The relief valve includes a lift chamber functioning to accelerate opening of the valve to assure that the valve fully opens once it has partially opened. The relief valve also includes construction features which allow control of the opening timing of the valve and which cause added closing force to be applied on the valve member to provide more positive closure thereof. Furthermore, a member is provided which substantially eliminates transfer of torque from a spring in the relief valve to a diaphragm therein and substantially eliminates angular cocking of the moveable valve assembly also in the relief valve.

Abstract: A coupling head assembly for coupling a source container of chemical in a closed system, the assembly including a main passageway for flow of chemical from the container, an auxiliary passageway for rinsing the container when connected to a source of rinse liquid, and a second auxiliary passageway connectable to such source of rinse liquid for rinsing at least one flow line of the system to the exclusion of the container. A control device provides for performing each of the three functions. While withdrawing the chemical from the container, the control device informs the operator by a signal, of the functioning status of the coupling head assembly.

Abstract: A fluid control valve includes a valve body having a passageway, a valve stem, a valve seat, a floating stem end member and a captive internally threaded insert. The valve stem has a molded-on, color-coded external thread mating with the internal thread of the color-coded insert so as to advance or retract the stem through the valve body as the stem is turned by an operating knob. The stem end member includes a pair of retaining arms which snap over a shoulder on the stem and these arms are confined within the valve body. These arms retain the stem end member on the stem while still permitting free rotation of the stem within the stem end member. As the stem advances into the valve body, the stem end member is moved into sealing contact with the valve seat, thereby blocking the continued passage of water from an inlet port to an outlet port. The valve seat also serves as a union nut mount, and is slotted for easy removal from the rear by use of a screwdriver for servicing.

Abstract: A positive-action non-leaking shut-off valve that requires minimal arcuate movement of the manual actuator from full-open to full-closed position is provided by three major components. A valve housing has a water-flow channel therethrough along its longitudinal axis and a cylindrical bore through said valve housing transversal to said water-flow channel. A lever-actuated valve shaft fits snugly into said bore. The valve shaft carries a plug therein that is centered for rotation about the centerline of the bore through the housing. The plug stoppers the water-flow channel when it is rotated against the openings that the water-flow channel makes with the cylindrical bore.