Abstract: A gas metering valve is provided for selectively providing a series of different calibrated gas flow rates. The valve includes a valve body having a gas inlet, a gas outlet, a chamber situated between the gas inlet and gas outlet. The valve also includes a metering element located in the chamber. The metering element is formed to include a plurality of passageways for permitting gas flow from the gas inlet to the gas outlet. The metering element is movable relative to the valve body to position a selected passageway in communication with the gas inlet. The valve further includes a seal apparatus including a sealing disk in sliding contact with the metering element. The sealing disk has an aperture formed therethrough aligned with the gas inlet for sealing said chamber against the transmission of gas therethrough except when the metering element is oriented with the selected passageway in registry with the aperture in the sealing disk.

Abstract: A diaphragm valve is provided with a removable metallic elastic seating ring (7) having a first passage (10) and at least one second passage (11) extending through it. The first passage communicates with an inlet passage (8) of the valve while the second passage communicates with the outflow passage (9). A first surface (7a) of the seating ring is provided with a valve seat (12) against which the diaphragm (6) may be pressed to block fluid flow through the valve. A second surface (7b) of the seating ring has two annular and axially extending projections (15, 16). The first projection (15) contacts a bottom surface (2a) of valve chamber (2) in a region surrounding the opening where the inflow passage joins the valve chamber. The second projection (16) contacts the bottom surface of the valve chamber around the periphery of the valve chamber.

Abstract: A valve is disclosed having a valve piston slidably movable within a valve casing. The valve also includes a spring biasing the valve piston against a valve seat such that the valve is normally closed, but may be opened when the pressure acting on the valve piston exceeds the biasing force of the spring. In order to assure perfect sealing between the valve piston and the valve seat, the valve seat is formed on a member which is movably mounted in the valve casing by a generally annular elastic element. The elastic element connects the valve seat to the valve casing, as well as a shoulder extending from the valve casing into the valve chamber,d such that an axial clearance exist between the valve seat member and the shoulder, and a radial clearance exists between the valve seat member and the valve casing under all operating conditions of the valve. Such clearances enable the valve seat member to move axially and radially so as to assure perfect sealing between the valve seat and the valve piston.

Abstract: A pressure relief valve, for pressurized fluid storage vessels such as a rail tank car for volatile liquids, has a flap valve for rotational movement in a valve passage between a closed position seated on a valve seat and blocking the passage and an open position in which the passage is substantially unobstructed. A spring arrangement for keeping the valve closed against a rated pressure includes an externally mounted spring system which, when exposed to fire conditions which might threaten the wall strength of the vessel, loses spring temper so as to reduce the closing pressure of the valve. The flap valve is supported through an arm by a ball joint allowing a limited pivotal movement, and the valve seat is located in the valve passage by an O-ring allowing a limited degree of float in its own plane.

Abstract: Disclosed is a disc valve with a laminated seal ring secured to the housing which forms a leakproof seal with a seating surface on the valve disc. The seal ring is made of two or more metal laminates, the outer peripheral edges of which are cold welded together, by WIG welding or laser welding, for example, to prevent any leakage of fluid pass the opposing, abutting surfaces of the laminations. A bolt-tightened pressure ring presses the laminated seal ring in an axial direction against an axially oriented support face of the housing. An axially open groove in support face is covered by the proximate seal ring lamination and is filled with a graphite gasket to prevent leakage behind the seal ring. Alternatively, the laminated seal ring can be mounted on the disc and the cooperating valve seat is formed on the housing.

Abstract: A flange seal, disposed on opposed sides of a bore and chest liner embodied in a gate valve and secured to one of a pair of rings disposed in opposed sides of the bore section of the liner, enhances the integrity of the seal formed between the gate valve and each respective radial flange of a connected pipe.

Abstract: A fluid connection and control device for fluid machines permits fluid inlet or outlet connections without the necessity for threaded connection to the machine. This is accomplished by an elongate radially symmetrical body having first and second ends and a central axial fluid passage connecting the ends. The body is appropriately sized for the fluid channel of the fluid machine and has a provision at the first end for attachment of a flexible hose. The second end has a provision for a fluid tight seal between the body and the fluid channel as well as a mechanism by which the body is retained within the fluid channel of the fluid machine while permitting rotation thereof. Options are provided for incorporation of a valve mechanism for controlling the fluid flow. This provides the advantages of rapid assembly and avoidance of undue stresses to the fluid machine housing.

Abstract: A replacement valve seat device for insertion in a recess of a valve where a valve seat has been removed includes a first ring which provides a valve seat and a cooperating second ring of memory metal which is expandable upon being heated above its transistion temperature to fixedly position the first ring in position within the recess.

Abstract: A safety or pressure relief valve which relieves excessive pressure in a storage reservoir in a compressed air system. The valve includes a lower valve body and an upper valve housing. A valve seat member is secured in the lower valve body. The valve seat member includes an annular dovetail groove for accommodating and retaining a fluorocarbon rubber O-ring seat. A valve disc and stem slidable within a stem guide member located in the upper valve housing. A compression spring for urging the valve disc against the fluorocarbon rubber O-ring seat to positively seal off the flow of air between an inlet and outlet port.

Abstract: Apparatus for regulating the fluid flow produced from a gas pressurized subterranean reservoir. The produced mixture comprising crude oil, water, gas and varying amounts of particulated matter. The apparatus includes a bean which is characterized by a constant diameter flow passage, which limits the flow to a maximum rate. An adjustable valve positioned immediately upstream of the bean flow passage is adjustable to regulate the flow of pressurized fluid from its source, to a desired value less than the maximum level maintained by the bean. The apparatus is structured to allow ready access to the interior to facilitate replacement and repair of internal parts which may become worn or damaged due to constant wear and erosion by the flowing, abrasive fluid.

Abstract: A fluid connection and control device for fluid machines permtis fluid inlet or outlet connections without the necessity for threaded adapters. This is accomplished by a radially symmetrical body having first and second ends and a central axial fluid passage connecting the ends. The body is appropriately sized for the fluid channel of the fluid machine and has a provision at the first end for attachment of a flexible hose. The second end has a provision for a fluid tight seal between the body and the fluid channel as well as a mechanism by which the body is captured within the fluid channel of the fluid machine. Options are provided for incorporation of a valve mechanism for controlling the fluid flow. The valve mechanism may be incorporated as an integral part of the body or as a separate modular unit which is retained in the fluid channel by the connector body.

Abstract: A balanced dual poppet valve for a fluid control device having a housing removable seats. Each valve seat has a cylindrical body with a flange thereon which engages a flexible member made of laminated graphite and retained in the housing to form a seal between the cylindrical body and housing while at the same time creating a defined radial clearance therebetween. A locking ring connected to the housing holds the cylindrical body in the housing and prevents the seats from rotating within the housing. The flexible member positions the cylindrical body within the radial clearance to maintain the alignment of conical seating surfaces on the cylindrical body with each seat with dimensional changes in the housing as a result of temperature changes to assure that flow communication from the entrance port to the outlet port terminates when an actuator moves the cylindrical body to an inoperative position.

Abstract: A nozzle support arrangement in an electromagnetic valve includes a frame, a solenoid fixedly mounted on the outside of the frame, a valve element arranged on the inside of the frame and driven in advancement and retreatment by the solenoid, a nozzle arranged on the inside of the frame and arranged so as to be opposed to the valve element, and support member by which the nozzle is supported on the inside of the frame. The support member includes a plurality of spacer sections fixedly mounted in an upstanding manner on the inside of the frame, and a plurality of latching sections arranged respectively at forward ends of the respective spacer sections and rotatably latching the nozzle.

Abstract: A seal arrangement for a metering valve wherein a cylindrical member has a groove located on a face adjacent a seat which surrounds an opening connected to an inlet port. An elastomeric member has a base which is located in the groove with a projection that extends past the face on the cylindrical member. A ring is resiliently held against the elastomeric member by a sleeve to form a first static seal between the cylindrical member, retaining ring and sleeve. A piston located in the sleeve has a flange with first and second ribs thereon separated by a recess. An input member positions the piston such that the first rib engages the projection and compresses the elastomeric member before the second rib engages the seat to form a static seal between the piston and cylindrical member to assure that fluid flow between an inlet port and an exit port terminates when the piston is in a closure position.

Abstract: A valve assembly for fluid pressure regulation provides freedom from static pressure creep by eliminating distortions and stresses normally introduced to valve parts during assembly of the regulator. A floating valve seat permits normal installation of a valve seat housing in the regulator body with no transfer of stress or distortion to the valve seat. Thus statis pressure creep, normally attributable to micro distortions of the valve seat, is avoided. Options are also provided to install the floating valve seat directly in a regulator body without the valve seat housing.

Abstract: A cartridge for a mixer valve comprising a cage, a supporting member for a hard material plate, a hard material plate mounted, operatively stationary, in this supporting member, at least one sealing gasket interposed between the fixed plate and the supporting member, and retaining structure arranged for connecting the fixed plate to the respective supporting member with a gasket compressed therebetween, in such a way as to maintain between these parts a constraint state, wherein the supporting member for the fixed plate is formed by a bottom applied to the cartridge cage, this latter having a seat intended for direct support of the fixed plate, and the retaining structure operating between the cage and the bottom of the cartridge. In this way the compression of the gasket is obtained without applying to the fixed plate any concentrated strain capable of damaging the same.

Abstract: A valve with an O-ring, a disk seal, and a replaceable valve seat. A groove n the bottom of the valve seat flange forms an inner and outer drip ledge with the inner and outer periphery of the flange. If leakage occurs at the valve seat O-ring, fluid droplets will form on the outer drip ledge. If leakage occurs at the disk seal, fluid droplets will form on the inner drip ledge. A visual inspection of these drip ledges through an access port, or by a borescope placed in an inspection port, can discriminate between a leak which originates in the O-ring and a leak which originates in the disk seal.

Abstract: A compact spray gun using a single air supply port to actuate two piston valves and act as an air refinement system. An externally adjustable cartridge type packaging assembly needle piston valve seals the resin. A spool valve portion of a catalyst piston valve having O-ring seals is separable external from the piston portion. Leak detection ports are provided so the operator can easily determine when to adjustment or replacement of the packing or O-ring seals. The catalyst piston valve controls the mixing of the catalyst and air from a second air supply port. In a preferred embodiment, the resin piston valve controls a valve which provide air to the chopper system simultaneously with spraying of the resin.

Abstract: The stepped borehole and the valve housing are normally provided with cylindrical circumferential sections, which have been subjected to fine finishing and which are in exact axial alignment with the borehole axis, O-rings being provided as sealing elements between these cylindrical circumferential sections. The production is expensive and requires a lot of work. The new connection is to be simpler from the point of view of production technology, easy to repair and easy to assemble. In order to achieve this, each sealing element (30, 30'), which is positioned within the tapped borehole (3, 3', 3", 3"') is a soft metal ring which has been cold-formed between the diametral step (15, 13) and a support surface of the housing under the influence of the thread tightening tension and which, due to its elasticity, compensates tolerances or inaccuracies resulting from the manufacturing process, ensures perfect sealing and contributes to a simplification of the manufacturing process and of the assembly operation.

Abstract: A removable valve seat has a peripheral annular flange retained between an annular shoulder in a flow passage and a pair of retainer pins slidably received in bores defined in the valve body. The pins are not threadedly or otherwise engaged in the bores but instead extend beyond the bore termini toward the valve access opening and are prevented from substantial axial displacement by a collar projecting into the access opening from a bonnet. The collar also precludes clapper mounting pins from being dislodged from open hanger recesses disposed in a hanger surface. Removal of the valve seat and other components are readily effected via the access opening by removing the cover, lifting the clapper out from the hanger recess, sliding the retainer pins out from their respective bores and then withdrawing the valve seat out of its flow passage.

Abstract: An intermediate bulk container (I.B.C.) system for handling a flowable material such as a pharmaceutical powder comprises, a discharge station, a transportable station for holding and transporting the powder, and a seal arrangement of the two stations, the seal arrangement being such that seals thereof cooperate one with the other and with the stations, whereby exposure of external surfaces of the system to the powder is obviated during discharge at the discharge station and during transport, so that no powder can escape from the interior to the exterior in use.

Abstract: A flow regulator for high-pressure fluids at elevated temperatures includes a body having a flow passage extending between inlet and outlet openings. First and second orifice members are arranged in the flow passage so at least one of the orifice members can be moved transversely in relation to the flow passage between one operating position where the two orifice openings are aligned for establishing a maximum flow rate of fluids flowing through the flow passage and at least one other operating position in which the two openings are moderately misaligned with one another for establishing a predetermined reduced flow rate of fluids flowing through the flow passage.

Abstract: A mounting flange of a thermostat having a seat member including a hard seat and the mounting flange for clamping the thermostat in a counterbore of a thermostat housing has an axial dimension which is less than or equal to the axial dimension of the counterbore. An elastomeric sealing element is interposed between the mounting flange and at least one of the thermostat housing and an engine on which the thermostat housing is mounted.

Abstract: A mixing valve includes a faucet body (1), a control mechanism, a support surface (9a) for a fixed valve plate (18) mounted on this support surface, a seal (16, 17) placed between the fixed plate and the support surface and a movable valve plate (19) connected to the control mechanism and appointed to shift in sliding contact with the fixed plate so as to regulate the flow rate and the mixing proportions. An attachment mechanism (31) connects the fixed plate to the support surface, the seal being compressed between them, by these parts exerting a compressive force. The compression of the seal is therefore made independent of the pressure between the fixed and the movable plates which can then be reduced to render better sliding and working of the valve plates. The attachment mechanism can be fixed or removable, and can work near the center of the fixed plate or along its border or in both positions.

Abstract: A mixing faucet for hot and cold water including a cartridge 40 which contains a fixed valve plate 32 and a movable valve plate 23, both constructed of hard ceramic material, and both constructed to control the proportion of mixing and the flow that comes out of the faucet. In this faucet, the part 25 of the cartridge that has the seat for the fixed valve plate 32 constitutes an element which is separate from the cover 16 of the cartridge. It is mounted in the cover 16 for sealed axial movement and is arranged so that sealed flow can occur from a part of the cavity of the body of the faucet that has a reduced section and in which one of the supply pipes 2 is connected. The seat 25 for the valve plate has some projections 30 which can interact in the passage apertures 32a to laterally affix the plate 32. The cartridge has an annular ring 34 which has some upper teeth 35 that engage with corresponding recesses 33 present peripherally on the work face of the fixed valve plate.

Abstract: A valve for control of fluid flow, the valve including a housing having a valve bore with inlet and outlet ports, a seal cartridge slidingly inserted into the bore and having integrally formed seal rings, in sealing engagement with the bore, and a valve spindle carried in the seal cartridge in sealing engagement with the seal rings with the spindle moveable between valve closed and open positions. A valve having two inlet ports and an outlet port with the seal cartridge being selectively positionable in the housing for controlling flow from a selected one of the inlet ports to the outlet port.

Abstract: A sealing washer for a tap top assembly of the type including an end housing containing a ceramic disc assembly, and for engagement with a valve seat within a tap body with the sealing washer normally engaging said ceramic disc assembly. The sealing washer is comprised of a ring of resilient compressible material surrounded by a sleeve of rigid material positioned whereby, in use, upon excessive compression of said resiliently compressible material a circumferentially extending flange on the sleeve will engage the end of the housing containing the ceramic disc assembly to retransmit the excessive compressive forces to the housing rather than the ceramic disc assembly.

Abstract: A one-way pressure relief valve assembly is provided for venting the lubricant reservoir of a roller-type well drilling bit. The valve assembly is mounted in the cap of the lubricant reservoir, to open outwardly, and is adapted to provide hydrostatic loading of the valve element to its closed position.

Abstract: An eccentric plug valve and method for assembly wherein the valve utilizes a replaceable valve set which is placed against a gasket held in a groove about a rim of a valve opening within the valve body and the valve seat is held in position by means to fasten one side of the insert to the valve body and by a groove in the bottom of the valve cavity and a cam ledge on a valve cover which engage the bottom and top edges of the insert, respectively.

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: There is disclosed a spray tip useful for high pressure, airless spraying which has an orifice tip holder that is reversible between spraying and cleaning positions and that is interchangeable with other holders supporting orifice tips of varied diameters and capacities. The invention particularly provides a turret member as the orifice tip holder which has a size that permits it to be used as an ejector pin or member for removal of the seal from the spray tip. The turret member is sealed in the assembly by a floating seal in which the liquid line pressure provides the force to maintain the seal against the cylindrical member. The forward end of the floating seal has a seal face formed of a very hard, preferably reinforced plastic.

Abstract: A high performance butterfly valve utilizing a thin sheet metal annulus to provide sealing between a valve casing and a rotary disc type valving member. The design of the sealing element provides for a self-sealing at all pressures, with augmentation of the sealing action as a result of applied pressure differential. As maximum stresses in the thin metal sealing element are approached, the element becomes supported at an intermediate region, enabling effective performance at both low and high pressure limits.

Abstract: A relief valve for low pressure operation includes a valve body having an enlarged cylindrical bore in alignment with an inlet port and defining a valve chamber. An outlet opens laterally from the valve chamber at a location spaced from the inlet port. An insert member is received in the bore and defines an axially facing raised seat circumferentially about the inlet port at a location closely adjacent the outlet port. A poppet valve with a truncated conical configuration and a maximum outer diameter only slightly less than the inner diameter of the enlarged bore is mounted for engaging the seat and blocking flow through the inlet. A biased stem extends into the valve chamber in axial alignment with the seat insert. The stem has a cylindrical end portion which is received in a cylindrical opening formed axially into the poppet valve on the end thereof opposite the seat insert.

Abstract: A ball check valve assembly for chemical pumps. A fluid conduit terminates at a first surface in a port of circular cross section. Within the conduit, an O ring seat is aligned with the port; an elastomeric O ring is positioned in the seat. Spacer means, radially outward of the O ring seat, extends generally away from the port and has a dimension adjacent the O ring seat greater than the cross sectional diameter of the O ring when unstressed. O ring capture means spaced from the O ring seat limits travel of the O ring away from the port, and provides a central aperture for the valve ball, which has a diameter greater than that of the port. The O ring has an ID less than the diameter of the ball and an OD greater than the diameter of the aperture; the spacer means ID is at least about 1/2% greater than the OD of the O ring.

Abstract: The present invention is an ajustable valve which includes a T-shaped fitting with a first bore, a stem, a bonnet and a valve mechanism with an outlet, a flow nozzle and a flow cone. The outlet is a cylinder with a bore of a first diameter. The outlet has a nozzle ledge and is fixedly coupled to the first bore. The flow nozzle is a cylinder with an inner sidewall and has a first open end and a second closed end. The flow nozzle has a first outer sidewall of the first diameter adjacent to the first open end and a second outer sidewall of a second diameter which is larger than the first diameter adjacent to the second closed end. The flow nozzle is slidably engaged within the outlet. The second outer sidewall has a plurality of orifices extending therethrough and communcating with the inner sidewall of the flow nozzle. The flow cone is a cylinder having an inner sidewall which slidably engages around the second outer sidewall of the flow nozzle.

Abstract: A globe valve comprising: a control rod (70) which is movable in translation along a valve axis (XX'), handle means (90) for controlling movements of said rod in translation, a disk (74) fixed to one end of said rod; a body (12) having an inlet passage (14) and an outlet passage (16) therethrough for passing a liquid, said passages giving access to a cavity (18) which is extended via a cylindrical orifice (22) disposed along said valve axis in order to receive said rod; a cage (36) lodged inside said cavity and within which said disk is capable of being moved by axial displacement of said rod; packing (46) surrounding a portion of said rod and disposed within said cylindrical orifice; a seat (28) which is removable from said body for cooperating with said disk in a closure position, said seat having a first face defining a sealing bearing surface for cooperating with said disk and a first annular thrust bearing orifice, and a second face defining a second annular thrust bearing surface; means for defining a t

Abstract: Valve seat structure for an automotive thermostatic fluid control valve device which is adapted to be positioned within a coolant fluid conduit system of an automotive engine. The valve seat structure has a rigid fluid flow control member which includes a cylindrical wall which forms a fluid flow passage. The rigid fluid flow control member also has an annular base which encompasses the cylindrical wall. An elastomeric sealing member resiliently encompasses the cylindrical wall. The elastomeric sealing member has an abutment portion and a clamping portion. Preferably, the abutment portion and the clamping portion are separated by a shoulder. A rigid clamping member has a clamping portion which is in engagement with the clamping portion of the elastomeric sealing member and is adapted to be clampingly engaged by a part of the coolant fluid conduit system. The rigid clamping member also has a shoulder portion which engages the shoulder of the elastomeric sealing member.

Abstract: A wear monitoring device for use in a choke valve. The device includes a wear liner which fits in the flow annulus of the valve. The liner is sealed at either end from the fluid inlet valve and defines an annular void space in fluid communication with a port to the exterior of the valve. Leakage caused by flow cutting through the liner can be observed as fluid discharge from the port.

Abstract: A clutch master cylinder comprises a master cylinder body provided thereon with a fluid reservoir tank and therein with an inlet port in communication with the reservoir tank and an outlet port for connection to a slave cylinder, a piston axially slidably disposed within the cylinder body and arranged to be moved inward by a push-rod, a valve seat arranged between the inlet and outlet ports within the cylinder body to permit fluid flow passing therethrough, a valve body associated with the piston to cooperate with the valve seat in response to inward movement of the piston, a fixed plug mounted on the cylinder body, and an adjusting plug disposed within the cylinder body to adjust an axial space between the valve seat and the valve body, the adjusting plug having an outer end portion adjustably threaded into the fixed plug and fastened in place by a lock nut threaded thereon and being provided at an intermediate portion thereof with an annular flange engageable with the inner end of the fixed plug to restrict

Abstract: A replaceable discharge valve assembly for a high pressure reciprocating plunger pump including a generally tubular valve seat member having respective cylindrical portions insertable in cooperating valve chamber portions formed in the pump cylinder block. The seat member receives a reciprocating valve closure member having a plurality of radially projecting guide ribs and a closure member disc portion. The seat member and closure member are retained in the cylinder block valve chamber by a cover member which is threaded and includes a cylindrical portion of a third diameter engageable with the valve seat member for holding the valve seat member in the valve chamber.

Abstract: A heater treater apparatus includes a vessel, a burner for heating a material contained in the vessel, an air intake passage for directing air to the burner, a flame arrester operatively associated with the air intake passage for preventing flames from the burner from extending past the flame arrester, and an air damper for controlling a flow rate of intake air drawn through the flame arrester. The air damper includes a fixed circular first plate having a first plurality of circumferentially spaced plate openings therethrough, and a similarly constructed rotatable circular second plate. The second plate may be rotated relative to the first plate from an open first position to a second position wherein the plate openings of the first plate are at least partially blocked by the second plate.

Abstract: A valve for controlling the flow of particulate material through a conduit which may be referred to as a clam shell valve including and arcuate valve plate. The valve includes a seal block having a recess for receiving the leading edge of the valve plate to assure a seal between the conduit and the valve element. The seal block is shaped to inhibit the entrance of material into the seal block and allow for the easy discharge of that material on opening of the valve element. The valve also includes an upper wiper seal element for cleaning the surface of the valve.

Abstract: A ball valve for controlling upstream to downstream fluid flow, for example, from an apertured tank bottom, has a housing body for bolted-on mounting. The housing has a flow passageway therethrough that angles between its upstream and downstream portions and that is controlled by a valve ball rotatably positioned in and sealed-off within its upstream portion. A resilient, L or ladle-shaped annular gasket is positioned upstream at the joint between the valve housing and the tank bottom and in engagement with the ball adjacent an upstream end portion of its open-end flow passage and, in such a manner as to maintain the flow area of such passage.

Abstract: A valve assembly for insertion into a valve body. The valve assembly includes a valve insert adapted to be positioned axially within the valve body. The valve insert has a longitudinally extending fluid passageway therethrough including an inlet opening at one end in communication with a source of fluid under pressure and an outlet opening at the other end remote from the fluid source and includes a seal disposed between the valve insert and the valve body to only permit flow of the fluid through the fluid passageway. In addition, the valve insert includes a sealing surface extending about the outlet opening. The valve assembly also includes a valve stem adapted to be in axially positioned alignment with the valve insert.

Abstract: A sealing arrangement, which can be inserted into a recess formed in a valve housing, to effectively provide a fluid pressure seal between at least one input chamber and one output chamber, and in which a slide piston is movably-disposed in the recess. The sealing arrangement includes a first gasket and a second gasket, which are disposed in coaxial relationship to one another, and which are concentric to the recess of the valve housing. The two gaskets are connected to one another by means of elastic annular connecting pieces. The connecting pieces of the two gaskets are located between a plurality of apertured retaining elements, which have a portion of the end surfaces of projections in contact with the connecting pieces. A plurality of rivet members pass through the apertured retaining elements and the connection pieces to hold them in the form of a sealing cartridge.

Abstract: A combination valve for relieving excess pressure while also stopping downstream gas flow. A pull-type valve core is mounted within the gas flow passage of a valve body. It includes an actuating plunger operatively connected to a poppet that overlies the valve core and sealingly reciprocates against an upper portion of the valve body. The poppet includes a head portion with a central orifice. The poppet seats against an inner surface of a vented housing which encloses the poppet, valve core and valve body. A spring biases the poppet to its seated position allowing normal gas flow through the central orifice and valve core. Excessive gas pressure will overcome the spring force and allow the excess to vent out the housing. Unseating of the poppet also allows the actuating plunger to close the valve core and stop gas flow to downstream equipment.

Abstract: An improved integral combination seat and seal device which serves the dual function of providing a seat for a valve member and a circumferentially extending seal to prevent fluid leakage.

Abstract: A ball valve seat is provided which comprises two separate reinforcement members, preferably of metal, embedded in an annular resilient body. The interior of the resilient body defines at one end a part-hemispherical ball valve seat and at its other end, of greater wall thickness, an outlet controlled by the ball valve. One of the reinforcing members has a flared skirt extending into the narrower wall thickness end of the resilient body and a narrower neck located in the wider wall thickness end of the resilient body, where it is received in an annular groove in the second reinforcement member. A portion of the second reinforcement member extends within the wider wall thickness end of the resilient body radially of the first reinforcement member over its skirt portion.

Abstract: A top-entry ball valve 10 comprising a valve body 12 having a chamber 13, flow passages 14, 15, a ball 20 rotatably mounted in the chamber for movement between open and closed positions relative to the passages, and a pair of seat assemblies 50 at opposed sides of the ball which may be loaded into engagement with the ball or disengaged therefrom. Each seat assembly 50 comprises a seat ring 51 having a rear portion 51a, a larger diameter portion 51b which forms a shoulder 51c, and a face seal 59. Three pins 65 in the seat ring 51 in equiangular spaced relation project from the shoulder 51c. A spacer ring 53 sleeved about the rear 51a of the seat ring 51 is provided with recesses 68 adapted to receive the pins 65. The spacer 53 is mounted for movement between a first position where it is engaged by the tips of pins 65 and a second position wherein the pins 65 are in the recesses 68.

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.