Abstract: A valve and tool assembly includes a valve seat, a valve seat recess, a seat carrier and a valve seat displacement tool. A valve seat installation tool is also described, as well as a valve seat replacement kit and a method for replacing a valve seat. The valve may be a diaphragm valve, for example.

Abstract: A main valve seat surface for engaging the piston, an outer sidewall, and an inner sidewall defining a flow passage with a first opening and an second opening, the flow passage having a reduced diameter portion.

Abstract: A ball valve which can suppress the increasing of processing labor time and reliably prevent simultaneous rotation of a ball seat and a ball when the ball is rotated by handle manipulation is provided. The valve body 2 is formed of a hard material such as stainless steel, the ball seat is formed of a relatively soft material such as a fluorine resin, and a protrusion 18 is formed on a ball seat support surface 13 of the valve body 2 made of a hard material so as to bite into the ball seat 4.

Abstract: Methods and apparatus to align a seat ring in a valve are described. An example fluid valve includes a valve body having a curved internal surface to receive a seat ring and a seat ring having a sealing surface to receive a movable control member and a curved surface opposite the sealing surface to engage the curved internal surface of the valve body.

Abstract: Embodiments of a seal element for use in a trim assembly that allow valves and, in particular, balance control valves to meet high-temperature and shut-off requirements. These embodiments can engage and disengage a cage element and a plug element of the trim assembly, thereby creating a seal that prevents leaks of working fluid that can compromise operation of the valve. In one embodiment, the seal element comprises an annular ring that circumscribes the outer periphery of the plug element. The annular ring can deflect in response movement of one part of the plug element relative to another part of the plug element. This deflection can cause the seal element to contact the cage element and the plug element in seal regions that are proximate to one another, and to the outer periphery of the plug element.

Abstract: Tapered valve guide and spring retainer assemblies are described for use in plunger pump housings that incorporate corresponding outwardly flared discharge and suction bores, as well as structural features for stress-relief. Plunger pumps so constructed are relatively resistant to fatigue failure because of stress reductions, and they may incorporate essentially any style of valves, including top and lower stem-guided valves and crow-foot-guided valves, in easily-maintained configurations. Besides forming a part of valve guide and spring retainer assemblies, side spacers may be shaped and dimensioned to improve volumetric efficiency of the pumps in which they are used. The present disclosure provides, for the first time, the use of tungsten carbide valve seats, which significantly increase durability and service life of a pump, especially when abrasive fluids are being pumped, as in various oilfield operations.

Abstract: A hydraulic control valve actuated by a diaphragm's integral spring whose thicker part acts with greater force to close the diaphragm and plug unit of the valve and whose thinner part may complete the closing motion so that the integral spring may weaken faster than linearly in relation to displacement of the diaphragm and plug unit. A snap seat supporting the plug may include a seat portion and a grip skirt portion integrally joined at an acute angle. A bracket and sliding guide may guide a helical rotor touching an indicator. Movement of the diaphragm and plug unit may rotate the helical rotor and the indicator without the indicator rising out of the valve. The cover may have an internal control passage in communication with a base of the valve to allow the cover to be installed horizontally and vertically conveniently and without disconnecting the control tubing above the valve.

Abstract: Apparatuses for restricting fluid flow through a well conduit comprise a tubular member having a seat member disposed within the tubular member for receiving a plug element. One or both of the seat member or the plug element comprise at least one shape-memory material to facilitate the plug element being able to land on the seat and/or to facilitate the plug element to pass through a seat member or other restriction in the tubular member either before or after landing on a seat.

Abstract: In a screw-in multi-way seat valve V comprising a screw-in housing 1, in which at least one sleeve 21 is positioned axially which sleeve 21 forms a valve seat 20, and a valve member 15 provided inside and having a seat surface 31 with a larger outer diameter than the inner diameter of the valve seat 20, the sleeve 21 is axially positioned in the screw-in housing 1 by a threaded connection 23 and at the same time is sealed by a press fit zone 24, the press fit zone 24 forming an anti-rotation protection for the threaded connection 23.

Abstract: Provided are a solenoid valve which is configured such that the valve body is not deformed when a retainer is mounted and which can be easily assembled, and a method of manufacturing the solenoid valve. A solenoid valve is provided with a valve body inside which a spool is provided so as to move in an axial direction, a solenoid section which is mounted to one end of the valve body in the axial direction thereof, and a retainer which is mounted to the other end of the valve body in the axial direction thereof. The retainer is fixed by a staking section which is provided to an end of the valve body in the axial direction thereof and staked in the axial direction.

Abstract: Methods and apparatus to align a seat ring in a valve are described. An example fluid valve includes a valve body having a curved internal surface to receive a seat ring and a seat ring having a sealing surface to receive a movable control member and a curved surface opposite the sealing surface to engage the curved internal surface of the valve body.

Abstract: It is intended to provide a medical stopcock characterized by having a housing made of a polyarylene sulfide resin and a cock made of a polyolefin-based resin, which has such pressure-proofness as being usable in angiographic techniques, high chemical resistance (Lipiodol resistance) and tolerance to radiation sterilization, in particular, tolerance to electron beam sterilization.

Abstract: A gate valve has seat rings pressed into counterbores to form seals. Each counterbore is located at an intersection of a flow passage with a central cavity of a body of the gate valve. The counterbore has a cylindrical constant diameter sidewall. The seat ring has an outer end that forms a pilot section and is of smaller outer diameter than the inner diameter of the counterbore. The seat ring also has an outer portion that is of equal or larger diameter than the inner portion, defining an interference section. The interference section creates an interference fit with the counterbore, forming a seal.

Abstract: A back seating valve includes a valve body enclosing a valve plug with a threaded through-bore; and a valve element with a threaded valve stem and valve head. The valve plug and valve stem are initially preassembled, and then inserted into the valve body. The valve body is mechanically formed to retain the valve plug in the valve body without the use of welding or brazing. The valve plug has an external, non-cylindrical geometry which prevents the valve plug from rotating within the valve body. The valve plug is axially held between a shoulder and a narrowed-down end in the valve body. An external portion of the valve stem can be rotated to move the valve head into open, intermediate and closed positions between a front valve seat in the valve body, and a back valve seat in the valve plug.

Abstract: A method of assembling a heart valve is provided for use with an inner and a spreadable outer stent. The outer stent is mounted onto a spreading tool including a spreading ring, and expander, and a plunger. A protective cap is placed over the outer stent and plunger to prevent relative rotation of the outer stent to the expander prior to the complete spreading of the outer stent. The inner stent, with tissue wrapped thereon, is mounted onto an insertion tool including a mandrel having a plurality of guide rails for mating with slots of the spreading ring, wherein the guide rails in the slots provide axial and radial alignment of the inner and outer stents. The mandrel holding the inner stent is inserted through the spreading ring holding the outer stent, thereby releasing the mated stents from the spreading ring and mandrel and securely clamping the tissue between the stents.

Abstract: An assembly tool for a bioprosthetic heart valve is disclosed. The tool assembles a valve having an inner and a spreadable outer stent, and includes a spreading ring with an elevated lip to hold the spread outer stent, an expander having fingers which contact the outer stent base to spread it apart, and a plunger to spread the fingers of the outer stent. An assembly mandrel having indexing rails allows the insertion of the inner stent into the spread outer stent while maintaining the correct rotational positioning of both stents. A shedding cap protects the tissue wrapped on the inner stent from abrasion during insertion.

Abstract: A fluid coupling wherein a tubular socket has a first terminal connectable with a first pipe and a section for reception of a section of a tubular plug further having a second terminal connectable with a second pipe. The axial passage of the socket contains a first normally closed valve, and the axial passage of the plug contains a second normally closed valve. The two valves open each other in automatic response to insertion of the plug section into the socket section, and each valve closes in automatic response to extraction of the plug section from the socket section. The seat of each of the two valves is a press fit in the respective passage.

Abstract: A saw-tooth shaped groove around the outside of a valve seat cooperates with the wall of a bore into which the valve seat is pressed to capture material displaced from the wall of the bore during the step of pressing the valve seat into the bore.

Abstract: The unidirectional limiter comprises a body, each of the ends of which is provided with a connection, a closure member mounted movably between a seat and an abutment element and a throttle ring mounted rotatably on the body of the valve for modifying the section of a throttle passage which is formed in the body and which passes around the valve seat. According to the invention the seat is formed at the end of the internal sleeve member of plastics material, which is latched by axial introduction in the internal bore in the body.

Abstract: A diaphragm valve includes a single layer, metal diaphragm cooperating with a plastic valve seat. The surface area and volume of the valve seat is limited. Additionally, the central portion of the diaphragm is generally hemispherically offset and extends axially from a planar periphery. The actuating stroke of the valve is maintained less than the offset that is formed in the diaphragm. Lastly, the valve seat is secured in such a manner to insure repetitive long term shutoff under a variety of operating conditions and limit entrapment and outgassing of potential system contaminants.

Abstract: A valve to control abrasive fluids under high pressure has a plastic seat. A circular ridge peripherally formed on the valve cartridge sealingly engages the seat. A means is provided within the valve cartridge to support the seat axially and radially. The diameter and taper of the poppet match those of a mating recess in the seat.

Abstract: A pressure relief valve adapted in use to relieve excess pressure within a vessel. The valve comprises a valve seat (20) and a moveable valve member (28) which is resiliently biased towards the valve seat (20) by coil springs (30) to maintain the valve in a normally closed position. A valve seal (52) is carried by the moveable valve member (28), between the moveable valve member (28) and the valve seat (20), to seal the gap therebetween when the valve is closed. The valve seal (52) has an annular pressure sealing face (54) which in the valves normally closed position sealingly co-operates with the valve seat (20).

Abstract: The present invention provides a valve seat insert (10) design which has improved heat transfer properties and thus results in improved engine performance. The insert (10) includes a pilot flange (12), a locking flange (15), and an annular groove (20) defined by the two flanges (12, 15). The diameter (D3) of the annular groove (20) is less than the pilot flange diameter (D1). The pilot flange diameter (D1) is less than the diameter (D2) of the locking flange (15). The height (H1) for the annular groove (20) is less than the height (H2) for the locking flange (15). Accordingly, when the invention is installed, engine head material which is displaced by the locking flange (15) fills the annular groove area and places the exterior surface (13) of the pilot flange (12) under a compressive load. This construction eliminates the occurrence of air gaps along the pilot flange exterior surface (--) and thus provides for an optimum transfer of heat in the engine cylinder head.

Abstract: The invention relates to a device for shutting off a pipe using generally U-shaped spring steel strips as sealing elements, each such element comprising a pair of arms which converge toward one another form an arcuate web at an acute angle. The deformation of the two flat arms of these sealing elements is limited by two flat, rigid rolling surfaces which are tangential to the web. Such a construction is distinguished by satisfactory functioning and a long working life.

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 an expanding gate valve having seats which are press-fitted into annular recesses in the valve body on opposite sides of the gate, each seat including a ring having at least one annular rib on its outer end which is of a harder material than that of the inner end of the recess and embedded therein to form a pressure barrier between the seat and recess.

Abstract: A shut-off valve, particularly for use in a pipeline for conveying gases, includes a valve casing, a valve member mounted for movement between a valve open position and a valve closed position, and a casing seal mounted on at least one of the valve casing and the valve member for forming a seal with a sealing surface at least when the valve member is in the valve closed position. The casing seal includes a frame member having two legs extending in a direction toward the position of the sealing surface when the seal is formed. The two legs are spaced and define therebetween an open channel. The casing seal further includes a seal member formed from a substantially flat elastic strip which is deformed to include two leg portions which are positioned between and freely and elastically urged toward respective inner surfaces of the legs of the frame member and a bent portion which connects the two leg portions and which projects outwardly of the channel for sealing contact with the sealing surface.

Abstract: A three-way valve assembly having a reciprocable valve plunger movably controlled by a solenoid. The valve housing has an elastomeric orifice member seated thereon, which orifice member controls flow of pressure fluid from a source. The valve plunger has an enlarged nondeformable valve surface thereon which engages a projecting end portion of the orifice member for sealingly closing off the orifice.

Abstract: A ball valve structure (10) having a valve seat assembly (46) positioned in annular seat pockets located in a flow passage (14) on opposed sides of a ball valve member (18). Each valve seat assembly is mounted for limited longitudinal movement toward and away from the adjacent ball valve member (18) and spring means (54) are placed within the seat pockets behind the valve seat assemblies to urge the assemblies toward and into intimate contact with the ball valve member. The valve seat assembly includes inner and outer annular concentric seat rings (48, 50) with a resilient sealing ring (52) secured therebetween. The inner annular seat ring has a flared end (64) which fits inside the outer seat ring and energizes or deforms the sealing ring (52) held therebetween, thereby, securely retaining the sealing ring between the seat rings and preventing the introduction of line pressure behind the sealing ring to possibly extrude the sealing ring from its position within the seat rings.

Abstract: In a butterfly valve comprising a valve housing including a cylindrical fluid passage and a disc-shaped valve body rotatable within the housing, a hard annular seat provided in the housing and a hard annular rim defined on the periphery of the valve body are adapted to contact one another over the entire circumference when the valve is closed. The valve of the above construction is very easy to manufacture and yet has a good sealing performance.

Abstract: A butterfly valve assembly having a corrosive resistant metal valve seat made of stainless steel or the like and supported in the passage of the body member of the valve assembly, the valve assembly further having a valve disc with an annular resilient sealing ring fixedly secured to the periphery thereof for cooperating with the valve seat. The valve seat is supported on the body member in such a manner that the valve seat may have limited axial movement relative to the body member when the valve disc is moved to the closed position so as to provide a compressive and/or fluid actuated seal between the valve seat and the body member whereby the butterfly valve assembly may be used in fluid distribution systems with the flow of fluid through the valve assembly being in either direction through the valve.

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 diaphragm-type irrigation valve having a molded plastic body, and including a metal valve-seat ring with sidewalls embedded in the plastic body. The seat ring has a generally U-shaped cross-section, at least one ring sidewall being non-parallel to a central axis of the ring. An O-ring seal is positioned within the ring to bear against the plastic material in which the sidewalls are embedded.

Abstract: A rotary ball valve includes a seat support integral with the valve body, a rotatable ball, a movable seat support, a retaining ring, and, on opposite sides of the ball, thin annular seating rings made from a material, such as tetrafluoroethylene. When the valve is assembled, the seating rings are deformed to engage the ball and supports and undergo a small amount of cold-flow outwardly toward interior passage walls of the valve body so that the outer periphery of the seat rings engages and forms a seal between the ball member and the interior passage wall. The seat-engaging surfaces of the seat supports each have grooves into which the seating rings cold-flow during valve assembly. Ribs are thus formed on the seating rings which keep the seats from rocking. The valve also provides an improved stem seal, including a Belleville washer confining a tetrafluoroethylene washer. In addition, the valve includes a handle having a novel projection for limiting movement of the ball to 90.degree.