Abstract: A swing check valve wherein the valve seat, disc and hanger for the disc are in the form of a replaceable cartridge which can be conveniently inserted in and removed from the valve chamber through one end of the valve body. The hanger is sized such that the hinge pin of the disc can move a limited distance in the hanger toward and away from the valve seat to provide a floating disc. A projection is formed on the disc positioned to engage the valve seat when the disc extends at about 90.degree. from the seat. The seal ring in the valve seat is sized to completely fill its receiving groove and the face of the valve seat is recessed at one side of the groove for distortion of the material of the seal ring therein upon closure of the valve.

Abstract: There is disclosed an automatic drain valve which consists of a control block with a central bore and a coaxial inlet bore. The central bore and the inlet bore are divided from each other by a seal which is seated in the inlet bore and held in place by a threaded fitting. An outlet bore communicates with the central bore at a position displaced from the seal, and a gauge bore intersects and communicates with the central bore at a position between the inlet bore seal and the outlet bore. The seal has an opening with a beveled edge that matches the beveled leading edge on a valve stem which is slidably mounted within the central bore and operated by means of pneumatic cylinder which is in turned controlled by solenoid operated either by a conventional timer or by a humidity sensor. The seal is placed out of the direct line of flow of the water and air being drained and the valve stem is closed at high velocity in order to minimize the wear on the round seal and extend the life of the drain valve.

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 sealing arrangement of the cylinder head with respect to the cylinder block by means of a flat seal which is constructed as intermediate plate and extends from the edge of the cylinder bore also up to its cylinder axis; essentially only circular openings for disk valves are provided in the intermediate plate so that the latter represents a thermal insulation of the combustion space with respect to the cylinder head.

Abstract: A valve device providing control of fluid pressure flow between a supply chamber and a delivery chamber by a movable plunger which forms a seal between the chambers when seated against a stationary supply valve seat and which establishes flow of fluid pressure between the chambers when unseated from the supply valve seat. A mechanical stop is provided on the supply valve seat to limit travel of the plunger beyond a predetermined point when the supply valve is seated against the supply valve seat. Thus, the exhaust valve on the plunger is prevented from traveling far enough to seal against the exhaust valve seat, thereby also preventing the supply valve from cutting into the supply valve and the possibility of inadvertently trapping pressure in the delivery chamber.

Abstract: A valve for vehicle liquid heating circuits that includes a sealed case, an inlet, an outlet and a mechanism for opening and closing at least one of said inlet and said outlet. The valve includes a guide means for mounting a member having a rack thereon and rotatable means with a toothed segment engagable with and actuating the rack along the guide means to move a valve plug into and out of engagement with a seat located at either said inlet or said outlet. A rotatable cylindrical element that includes said toothed segment extends through said sealed casing to accept a lever for actuating the segment to thereby move the rack and its associated plug.

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 pressure regulator system for providing controlled reduction of fluid pressure from a relatively high pressure fluid source to a relatively low regulated fluid pressure output. The pressure regulator includes a pressure reduction regulator designed for stable flow under transonic conditions, and an improved solenoid valve assembly for switching the reduction regulator to an operational condition.

Abstract: A fuel distribution valve assembly is provided with a laminated thermal buffer member between the valve housing and inner valve means to prevent binding of the valve means from thermal effects.

Abstract: A radially inner portion of a flat annular elastomeric washer is inserted and retained in a frustoconical annular groove formed in a cylindrical valve seat of an inline disc check valve. The groove is positioned and dimensioned so that it grips the washer and holds it in a radially stretched, axially skewed configuration wherein one of the washer's outer peripheral corner edges forms a leading sealing edge of the valve seat. At low back pressures in the valve, a line seal is formed between the leading washer edge and the valve's closure disc. High back pressures cause the disc to rearwardly deflect the protruding radially outer portion of the washer and engage the valve seat itself. Because the installed washer is both radially stretched and axially skewed, forward flow through the valve does not tend to dislodge the washer, and reverse flow around the washer portion within the groove is prevented.

Abstract: A beverage dispensing system has a container from which beverage is to be dispensed by a gaseous mixture of air and carbon dioxide from passage 31. Air pressure for dispensing is derived from compressor 7. Carbon dioxide 11 is capable of communication with the container by way of a diaphragm valve 14 which normally closes communication between the carbon dioxide source 11 and the container. Diaphragm 16 of valve 14 is responsive to variations in pressure derived from compressor 7 so that the valve 14 opens communication between the carbon dioxide source 11 and the container when mixed gases are demanded. The diaphragm 16 controls displacement of a spool 19 which determines the opening and closing of communication between the carbon dioxide 11 and the container. A chamber 17 communicates with the air line 9 while a chamber 18 communicates with the container and is capable of communication with the carbon dioxide 11 under control of the spool 19.

Abstract: A pilot operated pressure relief valve for use on medium and high pressure vessels, conduits, and the like. A two-stage, non-flowing pilot valve operates a main relief valve of substantially greater capacity. In a preferred embodiment the main valve is mounted directly onto the pressure vessel which is to be vented at a predetermined pressure. The pilot is preferably mounted closely adjacent to the main valve for operating communication therewith. An improved main valve seal is provided which allows the use of commonly available seal configurations in a simple and easily assembled construction to provide a fast operating, high pressure seal.

Abstract: A pressure and vacuum relief vent has the stem of each of its pressure and vacuum valves, which are urged to their closed positions by weight, slidably mounted in a bushing of Teflon in a metallic seat ring so that corrosive build up does not occur on the bushing whereby each of the valves is responsive to the desired pressure differential due to weight. Each of the seat rings has a seat insert of Teflon locked in a groove in the seat ring with an epoxy seal between an outer inclined surface of the seat insert and an inner surface of the seat ring.

Abstract: Means for sensing a discrepant position between two normally closed valves of a double valve assembly used to control an industrial machine such as an air-operated press clutch and brake. The indicating means comprises switch means responsive to the movement of each of the valves and so positioned that the switch means is actuated very close to the closed position of each valve. The switch means controls power to solenoid-operated pilot valves for the two main control valves of the double valve assembly. By controlling the switch means immediately adjacent the closed valve positions, the safe or closed part of the cycle is monitored for these valves, which are in themselves stable because of their normally closed nature. The switch means may be either cam-operated mechanical switches, proximity switches, photoelectric sensors, or contacts directly engageable by the inlet valve elements and utilizing the valve body itself as part of the electrical circuit.

Abstract: A valve of simplified construction, adapted to control fluid of high volume and pressure. The valve plunger is a hollow metal tube, that controls fluid flow by moving radial slots in its peripheral wall back and forth across a seal. The plunger is moved by an air or hydraulic cylinder which is connected to the plunger by a plate ring. The plate ring has a series of holes therethrough that allow the line media to flow through, out of and around the plunger to create a balancing effect and thus decrease opposition to movement of the plunger, which opposition may be caused by forces created by the line media. The improved valve utilizes double-acting seals to isolate a down stream port, and to seal off the increase in pressure downstream when the valve is closed.

Abstract: A valve seal includes inner and outer concentric seal rings located side by side in a groove with the inner seal ring against the groove inner wall and the outer seal ring against the groove outer wall. Interfitting surfaces are provided on the seal rings to hold them together and prevent longitudinal movement between them. The groove and the seal rings cooperate to hold the seal rings in the groove. One of the seal rings is relatively soft and has good low pressure sealing characteristics while the other seal ring is relatively hard and has good high pressure sealing characteristics.

Abstract: A hydraulic actuator for use in operating a remotely located flush valve includes a housing having fluid inlet and outlet ports, each of which are connected to the flush valve through tubes or the like with the inlet port being under fluid pressure derived from the flush valve. There are passage means connecting the ports with first and second seal members being positioned in the passage means. A stem is movable in the housing with the first and second seal members being positioned on and movable with the stem. A spring positioned within the housing urges the stem toward a position in which the second seal member closes communication between the inlet and outlet ports. The first seal member is located closer to the inlet port than the second seal member and is removable from the stem. There is a seat for the first seal member with fluid pressure at the inlet urging the first seal member, after removal from the stem, toward the seat to close communication between the inlet and outlet.

Abstract: A fluid flow check valve with two disc closure elements pivotally mounted in the valve's body. A concave surface on the upstream side of each disc assists in stabilizing the discs against flutter during flow through the valve, and angular lugs on the downstream side of the discs cooperate with a stop shaft to further stabilize the assembly when the discs are fully open. The valve also includes a resilient seat with an annular sealing bead to facilitate a high unit load on the seat at low pressures, and with a large seal area to support the discs at high back pressures.

Abstract: A valve seat - to - body connection, and an installation therefor. A resilient metallic ring having an inside diameter slightly smaller than the outside diameter of a valve body in which the seat member is to be installed, is placed around the section of the seat member. When the seat member is then inserted in the body, it provides initial sealing pressures, but is still readily detachable. Apparatus is provided for injecting a material of plastic consistency or the like into the area surrounding the metallic ring, which deforms the ring into fluid tight engagement with the seat member and the body. Additional seals may also be provided associated with the seat member.

Abstract: A valve comprised of a valve body having a body with flow passages therethrough and a valve member mounted therein movable between open and closed positions. An annular groove in the body around a flow passageway has an open end, a closed end, and a pair of divergent side walls with the groove width at the closed end portion being greater than the width of the open end. An annular seal is positioned in the groove. A chemical fastener in the groove secures the seal ring in the groove. A method of making the valve seal structure includes forming the groove with divergent side walls in a seal ring supporting position of a valve body and then partially filling the groove with a chemical fastener material. The seal ring is inserted into the groove within the chemical fastener material and the chemical material is cured to secure the seal ring in the groove.

Abstract: An off-axis rotary valve especially suitable for high-temperature vacuum tight fluid switching. A valve cylinder with an off-center opening(s) therein is mounted between two end seals. The end seals engage the circumferential edges of the valve cylinder and perform the functions of axially locating the valve cylinder, sealing the end faces of the cylinder, and providing for communication between the valve cylinder and fluid inlets and outlets. Means are provided for spring-loading the seal faces with the corresponding valve cylinder faces, and means are provided for rotating the valve cylinder.

Abstract: An annular, rigid reinforcement ring embedded in a body of molded elastomeric material forms a valve seat for a butterfly valve. The seat has a pair of diametrically aligned shaft openings for the valve disc supporting and actuating shaft. These holes extend through the elastomeric material and the reinforcement ring and, during molding of the elastomeric material, are occupied by removable cores which center the reinforcement ring about the cores between the end faces of the mold and position it concentrically between the inner and outer circumferential walls of the mold cavity. To prevent the reinforcement ring from rotating about the cores and to center it positively between the end faces of the mold, a pair of support extensions are provided aligned axially of the ring. One support extension protrudes from each edge or end face of the reinforcement ring. The pair of support extensions maintains proper alignment of the reinforcement ring with the end faces of the mold.