Abstract: The disclosure provides an actuating mechanism for a rotatable ball valve unit wherein several axially extending pistons and cylinder units or bellows elements are mounted in the wall of the outer housing of the ball valve in angularly spaced relationship. Two diametrically opposed piston or bellows elements actuate the mechanism for axially shifting and then rotating the ball valve, while the remaining piston or bellows elements effect a displacement of the flow tube to maintain a seal carried by the flow tube in sealing engagement with the ball after its rotational movement has been accomplished. The desired delay of movement of the flow tube is accomplished through either varying the size of the bellows element or the spring constants of the springs opposing the actuating movement of the pistons, bellows elements or a combination of these.

Abstract: A conduit closure apparatus comprising a main frame adapted for connection to a conduit in a position generally in registry with the conduit, a movable blade slidably mounted in the frame, means for moving the blade back and forth between an open position in which the blade is outside the conduit and a closed position in which the blade blocks the conduit, a slot-like port through which the blade slides when it is moved between its open and closed positions, and an inflatable sealing ring that is operable, when inflated, to press against the face of the blade at the blade's periphery when the blade is in the closed position, thereby creating a seal between the blade and the frame, is improved by having the main frame define a channel which holds the edges of the blade when in the closed position, and having the inflatable ring being carried by a second frame, smaller than the main frame, which slidably fits in the channel of the main frane and which can be withdrawn from the main frame through the blade port

Abstract: A hot and cold water pressure regulating mixing faucet with automatic hot water shut-off in the event of cold water failure. The faucet maintains a predetermined discharge pressure less than the supply pressure regardless of the amount of water issuing from the faucet in combination with parts in a flat face slide valve surface to regulate the amount of water issuing from the faucet or the proportionate mixture of different or hot and cold water, and in combination with a concentric rotary proportioning selector valve having an axial bore containing the pressure regulator valve operable axially within the bore of the rotary selector valve. The pressure regulator valve is operable to completely shut off the hot water in the event of cold water failure. The slide valve and the rotary proportioning valve and the pressure regulating valve are coaxially concentric to each other cooperating in performing their valvular function upon the water entering the housing and discharging axially.

Abstract: A four-way valve for use in a railroad air brake system has a housing with an internal chamber and a plurality of ports in communication with the chamber. Two of the ports are adapted for connection to a railroad car brake pipe with an intermediate port being adapted for connection to the railroad car air brake system. A valve member is movable within the chamber between a plurality of positions, there being a position to close each port and a neutral position in which all ports are in communication with the chamber. The improvement is specifically directed to a seal member carried by the valve member and spring means which urge the seal member outwardly of the valve member and toward the described ports. Each port has seal means which include a floating seal ring within each port, with each floating seal ring being positioned for sealing contact with the valve member seal member.

Abstract: A gate valve having an inlet and an outlet flow-way with a chamber having a gate inbetween and with counterbores at the end of the flow way adjacent the chamber is disclosed. Each counterbore telescopically receives a seat member. A sealing system for each of the gate seat members which permit certain liquid communication to the valve body cavity is disclosed. Each seal system includes seals on all sides of the gate seat member except the inwardly facing cylindrical walls. Each seal is disposed on an annular groove cut in the outer periphery surface of the end of the gate seat member. The seal on the upstream side of the valve body is located adjacent to the inwardly facing cylindrical wall. The seal between the gate seat and the gate is located near the valve body cavity. The seal on the outwardly facing cylindrical wall is adjacent to the valve body flow-way counterbores.

Abstract: An automatic sliding gate valve for connection to the ingress or egress opening of a vibrating dryer or other structure operable under either vacuum or pressure, the gate valve having a flat slide plate slidably movable by fluid powered cylinders and dampened, held rigid in its guides and held against pressure or vacuum by pneumatic seal members.

Abstract: Improved energy translation devices, such as fluid motors or pumps of the type including an orbiter member operatively coupled between a stator and a rotor, are disclosed which include an individually pressure compensated valving arrangement, telescopically interfitted piston elements having spherical, pressure loaded sealing ends, and a unique counterbalancing mechanism. The valving arrangement has a pair of intercommunicated, freely laterally movable valve bodies adjacent each fluid displacement piston assembly and respectively on opposite sides of the orbiter; each body includes especially designed, opposed fluid chambers therein for receiving pressurized fluid and individually urging each pair of bodies toward the central orbiter to establish a sliding seal with the orbiter and a desired amount of lubricating leakage of fluid adjacent the valve bodies.

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 seat assembly for an expanding gate valve comprising an outer loose fitting main ring (31) with a resilient face seal (41) for sealing against an expanding gate assembly which is mounted in a valve chamber (11) and an inner auxiliary ring (44) fitting loosely in a counterbore recess in the main ring (31) for sealing against the rear wall (35) of a seat pocket (26). An O-ring (61) between opposed surfaces (51, 52) of the rings (31, 44) continuously urges the rings apart and their orientation such that when the gate assembly is expanded in its open and closed positions, the front face (38) of the main ring (31) is flush against the adjacent sealing surface (25) of the gate assembly and the rear face (46) of the auxiliary ring (44) is flush against the rear wall (35) of the seat pocket (26).

Abstract: A control valve, the internal wetted working parts of which are made of corrosion resistant material and which are completely enclosed by and easily removed from a steel or stainless steel pressure vessel, and which is capable of tight shut-off when subjected to fluid differential pressure.

Abstract: Ram bodies mounted in transverse bores of a blowout preventer body with a longitudinal bore therethrough are operable by operating means extending through closures on one end of the transverse bores to move the rams to close off fluid communication through the longitudinal bore in the body and to retract the rams from the longitudinal bore. Removable seal means are provided on each ram body to seal with the transverse bore in which each ram body is mounted. Removable seal means extend diametrically across the front of each ram for sealingly engaging an elongate member in the longitudinal bore when the rams are closed. The removable seal means is retained in position by non-torquing means during use but may be readily replaced when necessary. Self energizing seal means on the ram body sealingly engage the transverse bores.

Abstract: The invention is an improved self-centering, floating metal seal to be used in combination with a ball valve which controls the flow of fluid in a conduit. The ball valve includes a valve body which has a bore extending therethrough and which also has an inlet and an outlet which are axially aligned and adapted to be mechanically coupled to the conduit. The valve body also has an aperture therein. The ball valve also includes a spherical valve member having a port the axis of which is alignable with the axis of the bore of the valve body and a stem having an inner end mechanically coupled to the spherical valve member and an axially outer end which extends through the aperture of the valve body. The ball valve further includes a device for forming a seal between the aperture of the valve body and the stem.

Abstract: An annular seat for use in a ball valve has two groups of pressure relief passageways each of which extends completely through the seat between its front and rear faces. The relief passageways in one group are located adjacent the outer periphery of the seat. The passageways in the second group are located radially inward of the passageways in the first group, and extend between the rear face of the seat and a curved sealing surface on the front face of the seat. A pair of such seats are disposed in a ball valve housing adjacent opposite sides of a rotatable ball. The interior seat support surfaces in the housing have machined recesses adjacent the central axial fluid passageway through each seat, to facilitate lip flexure of the seats. The overall arrangement provides a bidirectional valve which seals on the downstream side only of the valve, and which relieves excessive cavity pressure in the valve past the upstream seat.

Abstract: A flow control valve assembly for closing an inlet into a housing through which powdery or granular material is flowing and for sealing said inlet once closed, the assembly comprising a closure member movable within the housing from an inoperative position in which the inlet is open into a normal operative position closing said inlet, during which movement a deformable sealing ring mounted in the housing to surround the inlet wipes over, to clean, the closing surface of the closure member and to make initial sealing contact with the closure member. Inflation of the sealing ring against the closure member in its normal operative position then supplements the seal while, on subsequent pressurization of the interior of the housing, the closure member is displaced bodily within the housing axially towards the inlet to make increased contact with, to supplement further the seal with, the sealing ring.

Abstract: Valve seat rings are provided having sediment guard recesses formed in the back face portions thereof, which recesses are in the form of annular grooves having restricted annular openings and defining an internal stop shoulder. A sediment guard is movably positioned within the receptacle and includes an annular sediment blocking portion that protrudes through the restricted groove for sediment blocking engagement with a radial surface defining a portion of the seat recess. The sediment guard also defines a stop portion that is engageable with the stop shoulder to prevent separation of the sediment guard from its receptacle. The sediment guard is urged toward the radial surface of the seat recess by compression springs located within the receptacle.

Abstract: A fire-safe seal for a valve having a metallic seat ring with a resilient seal ring in a leading face thereof to seal against a valve closure member. A thin, metallic flexible diaphragm is clamped around its outer edges to the body and around its inner edge to the seat ring. An annular sealing ridge, which is concentric to and smaller than the resilient seal, is provided around the face of the seat ring to provide a metal-to-metal seal in the event of destruction of the resilient seal.

Abstract: A valve, comprising: a cylindrical casing, closed at its ends by covers, and having axially aligned inlet and outlet chambers midway of its length disposed at right angles to the axis of the casing. Communication between said chambers is controlled by a ported, fluid pressure operated, movable valve plate assembly, including parallel cylinders, each containing a stationary piston connected to the inner end of a pair of axially aligned rods, or guides, fixed at their outer end to the covers. Each rod has a passageway communicating at its inner end with one end of its associated cylinder for supplying operating fluid thereto to bodily reciprocate the valve plate assembly on said rods within the casing. An adjustable collar positions a fixed wear plate in sealing engagement with one side of the valve plate assembly, and a fluid pressure actuated loading ring urges a floating wear plate into contact with the other side of said valve plate assembly.

Abstract: A pipe valve assembly including a housing defining a flow aperture, a valve member for opening and closing the flow aperture, a spring biased valve seat ring for pressing the valve member to seal the aperture, a spring assembly urging the valve seat ring away from its sealing position and a fluid pressure chamber on one side of the spring assembly for receiving fluid pressure to actuate the valve seat ring into its sealing position. The spring assembly in formed with a smaller diameter annular spring member and a larger diameter annular spring member arranged coaxially relative to each other and relative to the valve seat ring with the valve seat ring being attached with an outer edge of the smaller diameter spring member and the inner edge of the larger diameter spring member. The spring assembly is supported in the housing at an inner edge of the smaller diameter spring member and at an outer edge of the larger diameter spring member.

Abstract: An improved mounting and sealing assembly is provided for a rotating ball valve required to open under increased differential pressures and close against high flow rates. The valve assembly includes a trunnion-mounted ball and two pressure biased sealing assemblies. The primary seal constitutes an elastomeric seal element which is axially shiftable into engagement with the ball, and the secondary seal comprises a metallic element which is also axially shiftable relative to the ball. To open the valve, the seals are moved in sequence axially away from the ball and the hydraulic seal is fully broken before the ball is rotated. In closing, the ball is rotated to its closed position and the seals then moved axially in sequence into contact with the ball.

Abstract: An expansible device for exerting force which has a generally "S" shape cross-section, being formed by stepped diameter cylinder, and arrangements using such a device are disclosed. The device may exert sealing forces and be controlled by admission of fluid pressure which acts on a thin wall member so supported as to be subjected to compressive stress alone.

Abstract: An improved mounting and sealing assembly is provided for a rotating ball valve required to open under increased differential pressures and close against high flow rates. The valve assembly includes a trunnion-mounted ball and two pressure biased sealing assemblies. The primary seal constitutes an elastomeric seal element which is axially shiftable into engagement with the ball, and the secondary seal comprises a metallic element which is also axially shiftable relative to the ball. To open the valve, the seals are moved in sequence axially away from the ball and the hydraulic seal is fully broken before the ball is rotated. In closing, the ball is rotated to its closed position and the seals then moved axially in sequence into contact with the ball.

Abstract: The valve of the present invention includes an inflatable seal element located in the housing seat and a gas-pressure-purge arrangement. The inflatable seal element is inflated by means of pressurized fluid to grow in size and close up clearances between gate and seat, thereby establishing a gas-tight seal between the two parts, at will. So this can be done, for example, after the valve has been operated to close (slide gate driven into the valve housing) and a gas-pressure-tight seal is desired. Prior to this event, the gas-pressure-purge arrangement is activated to blast-off solid particles from the gate surfaces where these make contact with the inflatable seal element. It is not mandatory that each and every solid particle be removed from the gate contact surfaces by means of the gas-pressure-purge arrangement. Only a reasonable amount of cleanliness on the gate contact surfaces is desirable.

Abstract: A ball valve having a seat assembly (46) in the form of a flexible metal holder (52) which carries a resin impregnated graphite face seal (54) contacting the ball (28). Flexibility of the holder is provided by a leg (58) thereof which terminates in a free end having an annular lip (62) in sealing contact with the valve body. In a modified arrangement, the upstream seat has an annular space exposed to the upstream flow passage in order to increase the sealing force, while a corresponding annular space of the downstream seat is exposed to the valve chamber to increase its sealing force when the body pressure exceeds the downstream pressure.

Abstract: A ball valve assembly that is solids-proof, corrosion-resistant, will maintain seals even under large pressure differentials, and can operate from cryogenic levels to high temperature ranges. An annular recess is formed in the valve body adjacent the ball, and an annular valve seat of rigid material is disposed in the recess. Facing surfaces of the valve body defining the recess and the valve seat are shaped to define a region therebetween having a larger volume (and cross-sectional area) at the high pressure side thereof than at the low pressure side thereof with the transition therebetween. A solid elastic material annular body, such as a sponge graphite body, is disposed in the recess to positively elastically engage the surfaces along the transition upon application of high pressure to the high pressure side of the region, to bias the valve seat into tight sealing engagement with the ball. The surfaces may be beveled, with an angle of convergence of about 2.degree. to 20.degree.

Abstract: A fixed upstream seal is provided having a variable geometry to provide a maximum body thickness at points of large deflection and a minimum body thickness at points of small deflections with the body thickness varying in progressively from maximum to minimum and minimum to maximum for predetermined halves of the circular seal. Also, a fixed downstream seal is provided having a variable geometry to provide minimum body thickness at points of large axial rotor deflection.

Abstract: A ball valve is disclosed wherein seal assemblies, extending about flow passages in the body of the valve to either side of a valve chamber containing the ball, are constructed to vent excess pressure in portions of the valve chamber cut off from the flow passages by the sealing of the seal assemblies to the ball and to the valve body without the need for backing the seal assemblies away from the ball. For this purpose, the seal between the valve body and each seal assembly is formed by an elastomeric biasing ring which is bonded on one side to the valve body or to other portions of the seal assembly and has an opposite, free side engaging the other of the valve body or other portions of the seal assembly. The biasing ring is positioned on a side of the seal assembly opposite the ball and fluid pressure in the cut off portion of the valve chamber is transmitted about the seal assembly to the free side of the biasing ring for venting thereacross into a flow passage.

Abstract: Disclosed is a ball valve with seats having means to relieve harmful build-up of cavity pressure. The heel of the valve seat has grooves therein allowing cavity pressure to be applied over a portion of the seat surface in a fashion that produces a resultant force in a lip region of the seat. This resultant force causes the lip region of the seat temporarily to move away from the ball and thus vent the cavity pressure to a lower pressure zone.

Abstract: A valve for controlling the flow of hot fluids in nuclear reactor plants or similar institutions has a tubular body whose internal surface is welded to an annulus of metallic leaf springs each connected to the outer end of a radially inwardly extending metallic spoke. The inner ends of the spokes are adjustably connected with a metallic sealing ring which is movable axially by a bellows into and from sealing engagement with a plate-like sealing member forming part of a plug-shaped or spherical valving element which is turnable or shiftable between open and closed positions. The bellows is caused to disengage the sealing ring from the sealing member prior to movement of the valving element to open or closed position and to engage the ring with the sealing member when the valving element assumes the open or closed position.

Abstract: A ball valve including a valve housing, a valve seat retainer fitted in a fluid passageway of the valve housing and being movable forwardly and backwardly within a given distance along the direction of movement of pressurized fluid, a sealed chamber formed in a portion of a spacing defined by the rear wall of the valve seat retainer and the inner wall of the valve housing, a channel formed in the valve housing for communicating the sealed chamber and an upstream fluid passageway, and a switch valve for opening or closing the channel to allow or prohibit movement of fluid within the upstream fluid passageway toward the sealed chamber, to vary the pressure force of the pressurized fluid acting on the valve seat retainer in the direction of movement of the pressurized fluid, whereby the valve seat retainer and the valve seat are displaced in the direction of movement of the fluid so as to come into contact with the periphery of the ball-shaped valve member when the pressurized fluid enters into the sealed chambe

Abstract: A rotary flow regulating valve in which a cylindrical expansible bellows mounted in the valve body and encircling a conduit therethrough moves a circular seal means between engagement with a spherical sealing surface of a valve member and a position withdrawn from the sealing surface. The valve body and valve member cooperate in defining a circumferential flow path between the sealing surface and the valve body and a diametrical flow path through the valve member. With the bellows vented to withdraw the seal means from the sealing surface, the valve member is rotated to regulate fluid flow through the valve while dividing fluid flow between the circumferential and diametrical flow paths and continue fluid flow over the sealing surface to thereby distribute wear and maintain sealing efficiency.

Abstract: An apparatus for opening and closing a downcomer conduit through which crude blast furnace gas is delivered to a dust catcher. A frame is provided which is completely integrated with the upper part of the dust catcher enclosure and which is a prolongation of the walls of the enclosure. The frame provides a fluid-tight compartment which allows for hermetic sealing of the valve from the environment external to the conduit.

Abstract: A ball valve for controlling the flow of hot fluids in nuclear reactor plants has a tubular body for a spherical valving element which is flanked by two axially movable seats and is turnable between open and closed positions. Discrete bellows are provided to move the seats away from the valving element before the latter is set in motion and to urge the seats against the valving element when the latter assumes and dwells in the newly selected position. The body and the valving element define a main cooling chamber which accommodates the seats and receives pressurized coolant. Such coolant flows into the fluid-conveying passage of the body by way of a clearance between cylindrical heat-insulating layers at both sides of the valving element and the periphery of the valving element. Additional cooling chambers which are provided between the bellows and the insulating layers communicate with the clearance via gaps between the seats and the respective insulating layers.

Abstract: A housing in which a locking tube is contained is threaded into a suitable threaded opening in the valve casing with the opening communicating with the interior of the casing adjacent the seal piston; the locking tube is threaded within the housing and is engageable with the seal piston to lock the seal piston against the valve insuring positive sealing engagement; a detector push-rod is axially movable within the locking tube and is spring loaded against the seal piston; when sealing has been effected, the push-rod effects the actuation of a limit switch to initiate the operation of a signal device.

Abstract: Sealing means for a flat gate valve comprising one-piece seat rings on both sides of the gate. A resilient O-ring is loosely received in an annular groove in the leading face of each seat ring and the leading faces of the seat rings, radially outward of the annular groove are relieved to provide small clearances with the sides of the gate. A series of vent ducts are provided in the seat ring at the bottom thereof from the bottom of the O-ring groove to the valve body space radially outward of the seat ring.

Abstract: A ball valve having improved sealing capability, which has a conventional housing, with a flow opening, and means for positioning and rotating the ball inside of the housing. There is at least one metal seal ring which is positioned and sealed inside of the housing, in a position where it is coaxial with the flow opening through the housing. It has a conical surface which includes a resilient seat ring, which faces and is spaced a selected distance from the surface of the ball. The ball has at least one circular wire ring, made of a selected diameter of wire. The ring is attached and sealed to the surface of the ball as a circular ridge in such a position that when the valve is closed the ridge will be coaxial with the seal ring and will penetrate into the surface of the resilient seat ring a selected distance in order to create sufficient internal pressure to seal against fluid pressure in the flow opening through the valve.

Abstract: A high pressure environmental ball valve wherein the ball valve member is tiltable into engagement under the influence of pressure into tight sealing relationship with a sealing ring at the valve outlet. The spindle is connected to the ball by a loose fitting wedge member and cooperating V-groove. When operation of the ball is desired, the spindle is moved linearly before rotation in order to bring the wedge on the end of the spindle into tight engagement with the V-groove, low-torque rotation being possible.

Abstract: A high pressure ball valve, the ball valve being tiltable under pressure into tight sealing engagement with a sealing ring at the outlet of the valve body. A joint is formed between the spindle and the ball to allow the tilting action of the ball, while still providing low-torque turning of the spindle. A parallelepiped-shaped joint portion is formed on the bottom of the spindle and is loosely received between two bearing blocks on the ball valve so that small amount of loss motion is provided between the spindle and ball valve.

Abstract: A valve includes a central valve component with an integral housing molded therearound. During the molding of the housing a seal is held against the valve component by spaced fingers of a tool. After molding is complete and the tool is withdrawn, plastic gripping fingers formed from plastic injected between the fingers of the tool during molding hold the seal againt the valve component and the housing.

Abstract: A device, such as a damper or valve, for use in closing a conduit against the flow of liquid has a chamber surrounding and opening into the conduit. A blade at one side of the conduit is movable through the chamber from a first position within a bonnet into a conduit-blocking position. Means carried by the chamber side walls surround the conduit and are between the conduit and the blade when in its first position and are operable then to coact to seal the chamber against leakage into it and to seal the blade when in its second position. At least one seal is of a type brought by fluid under pressure from a position out of the path of the blade into its sealing positions and is carried by the side wall enabling the seal to engage the blade face exposed to the fluid flow. Means are provided to deliver fluid pressure to the pressure operated seal when the blade is in either position and to relieve the pressure therein when the blade is to be moved.

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 valve assembly for closing and sealing an inlet which is full of large granular dry material including a dome-like valve member mounted for rotation to open or close the inlet and a deformable resilient sealing ring which may be inflated by gas pressure to engage the valve member in its closed position to produce a gas-tight seal across the valve member, the sealing ring being arranged within the valve assembly to minimize abrasive wear on the ring from the granular material.

Abstract: A floating seat ring for a gate valve structure has an external pressure source to move the seat ring into engagement with the gate valve. A pocket for the seat ring is formed by a counterbore in the valve body and a tubular insert is inserted within the valve body bore extending within the seat ring. This inner end portion of the tubular insert defines with the counterbore the pocket for the seat ring for floating back and forth movement. An external pressure source is in fluid communication with the pocket behind the seat ring to move the seat ring outwardly.

Abstract: A sealing device which can open or seal a gap between two spaces that are maintained at different pressures has two members provided with surfaces flanking the gap and a seal which is received in a recess provided in one of the surfaces and extending transversely of the gap. The seal has a first section constituting a diaphragm or a hose which is secured to the recessed member and a second section resembling a flap integral with but pivotable relative to the first section at that side of the first section which is nearer to the low-pressure space. The first section is deformable in response to admission of pressurized fluid against one of its sides whereby the other side moves the flap, or at least the free marginal portion of the flap, against the surface of the non-recessed member.

Abstract: A method of sealing an annular gap and a sealing arrangement suitable for plug valves, shafts and pistons. An annular sealing member is toroidally rotated through a substantial angle prior to or during insertion in the gap to be sealed, and is arranged so as to be free to react toroidally against the sealing surfaces bounding the gap for positive sealing engagement therewith. In this way the sealing member forms a resilient seal for the gap without being subject to significant radial stresses. An important application of the invention is to seat seals for ball plug valves.

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 mixing tap comprising a tap body with hot and cold water inlets and an outlet all leading into embossments in a hollow spherical configuration on which a spherical control member is swivelably mounted. The control member has an inner mixing chamber with two peripheral openings which selectively cooperate with the liquid inlet ducts to adjust the hot/cold water mixture according to the inclination of the handle, and a third opening which leads to the outlet duct, a flow-setting valve in the mixing chamber being controlled by screwing the handle. Flexible annular lips integral with the embossments about the inlet ducts, and a flexible tongue fitted around an opening in the tap body through which the handle passes, are pressed by the liquid pressure against the control member to provide fluid-tightness.

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: In an end entry ball valve assembly, a bifurcated seal carrier comprised of an annular seal support member and back-up member, is received in at least one end opening. The seal support member includes an axially facing end wall and a radially facing guide wall. The back-up member is slidably received in the opening and presents a recess defined by an axially facing support wall and a radially facing guide wall respectively adjacent the end wall and guide wall of the seal support member. An annular, resilient biasing and sealing ring is disposed, in a radially tensioned and axially compressed condition, in a groove disposed in at least one of those axially facing walls at a location radially inwardly of the guide walls. The ring biases the seal support member and a seal carried thereby toward the valve ball and seals against fluid flow between the axially facing walls.

Abstract: Sealing means for sealing between a moving member and a fixed frame with which the moving member cooperates, said sealing means comprising rigid, elongated, channel means (on either the frame or the moving member), said channel having a back wall and at least one side wall; a rope which is resiliently compressible across its width positioned lengthwise in said channel; and an elongated metal strip having opposing front and rear surfaces, said strip being 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 channel means, rope, and metal strip being positioned such that the complementary part (either the moving member or the frame) can press against the front surface of the metal strip in sealing engagement therewith, urging the strip against the rope, the resilience of the rope providing a pressure counter to that exerted by the complementary part.

Abstract: A solenoid actuated pilot valve for handling high pressure fluids wherein a single inlet and outlet shear seals are used on the gate which is mounted for movement on roller bearings to reduce frictional loads in moving the pilot valve gate in an unbalanced condition.