Abstract: A valve including a valve body having a bore and a spindle received in the bore, the spindle being actuatable to open and close the valve. A compression gland seal is provided about the spindle for compression between the spindle and the bore. A first seal ring is provided about the spindle at a position spaced along the spindle from the gland seal, and provides a seal between the spindle and the bore of the valve body. A second seal ring is provided about the spindle at a position spaced along the spindle from the gland seal and the first seal ring, and provides a further seal between the spindle and the bore of the valve body.

Abstract: A method for rebuilding a flow control valve, may be performed by first providing a flow control valve having a rotor positioned in a chamber of a valve body. The rotor has a valve stem. A top cover plate is mounted to the valve body above the rotor and has a first bore through which the valve stem protrudes. The top cover plate is removed so the rotor can be removed from the valve body. A seal is positioned on the top cover plate along the first bore so that when the rotor and top cover plate are placed in or on the valve body, the flow control valve is sealed at the interface between the top cover plate and the valve stem.

Abstract: A stem shoulder seal with double rings is composed of a sealing ring, a clamping ring and a spherical or conical stem shoulder, and the sealing ring is of a self-energized seal designed to its ultimate allowable strength and automatically free of any load beyond its ultimate strength. An assembly of independent dual stem seals, consisting of a stem shoulder seal with double rings, a stem cylinder seal with triangular sections and an isolating mating, can ensure that a stem has three seals which get well seated automatically at the same time to bear an identical ultimate medium pressure independently or without any mutual interference in service when assembled to the extent that the stem operating torque is just definitely increased, thereby ensuring that a stem sealing has a triple safety.

Abstract: A valve and stem sealing assembly capable of preventing leakage under demanding environmental and operating conditions. The valve comprises a body and bonnet secured together to house a flow-element, stem, and stem sealing assembly. The body may contain a body joint encapsulated within its liner. The flow-element is positioned between a first port and second port on the valve. The body and bonnet may be configured to eliminate rotational forces from being translated to the bonnet. The stem sealing assembly comprises a primary seal, primary shaft insert, spacer, and force transmitting member. The stem sealing assembly may also comprise a secondary seal and secondary shaft insert. The stem seal assembly is substantially adjacent to the stem, and configured to fit within an annular space or cavity between the stem and the first body half, second body half, and bonnet. The valve may also include a leak detection port.

Abstract: The disclosure provides a choke with an actuator that contains various components within an actuator housing to adjust the choke, and the housing is configured to be fixedly attached with a relatively large shearing connection on an actuator adapter to resist large overpressure surges within the housing and around the components. The actuator further includes a thrust bearing mounted adjacent a shoulder in the housing and supporting a worm gear, so that any overpressure loads are directed to the shoulder of the housing and retained within the housing while the housing is retained by the shearing connection to the remainder of the choke.

Abstract: A ball segment valve for controlling fluid flow in a piping, includes a valve housing with a valve seat disposed therein, a tubular bearing body fitted to an upper axial opening of the valve housing, a rotating spindle inserted through the bearing body into the valve housing, a tightening sleeve unit sleeved on the spindle to ensure full engagement of the spindle with the bearing body, a journal member inserted through a lower axial opening into the valve housing, and a valve body having upper and lower lugs coaxially fitted to the spindle and the journal member, and a spherical segment having a convex outer spherical surface and rotated with the spindle between a fully closed position, where the spherical surface is in sealing contact with the valve seat, and a fully opened position to permit a full fluid communication of the valve housing.

Abstract: Disclosed are a method and a ball valve structure which provide for an improved seal in a trunnion mounted, double piston ball valve, which is especially useful in applications requiring a seal against high pressures, such as in the oil, gas and chemical process industries. Higher pressures on an inlet side of the valve are used, while the valve moves toward and is maintained in a valve closed position, to create movement of a ball element of the valve so as to bias the ball element against both piston seat elements (or rings) used to create the seals. This movement of the ball element thereby effectively uses such upstream pressure to create and enhance a seal between the ball element and both piston seat elements while in the valve closed position.

Abstract: Any stem seal using either a triangle-sectional bushing or ring as stem cylinder seals or a ball wedge/spherical socket mating arrangement as stem shoulder seals can individually withstand the same pressure as the burst pressure of bodies without failure. The sectional triangle of the triangle-sectional bushing or ring is truncated to provide a wearing and compressing allowance for the bushing or ring, and so will be again a full triangle or an untruncated triangle when the bushing or ring is fully worn. The ball wedge/spherical socket mating is a mating which uses ball wedges as a stop shoulder of stems and the spherical socket as a stop socket at stem exits.

Abstract: Provided is a sliding member which includes a plurality of open pores in a sliding surface, which each comprises one or more opening portions having a circularity of 0.24 or more and a circle equivalent diameter of 10 ?m to 150 ?m. A ratio of the number of open pores having the overlapping degree of 10% or more between the opening portions is 3% or less. Another sliding member includes a plurality of open pores in a sliding surface, which each comprises one or more opening portions having a circularity of 0.24 or more and a circle equivalent diameter of not less than 10 ?m nor more than 78 ?m. A coefficient of variation of the opening portions satisfies the following equation: 1.03??V/X?1.51 where ?V is a standard deviation of circle equivalent diameters, and X is an average value of the circle equivalent diameters. A mechanical seal ring, a mechanical seal and a faucet valve each using the sliding member are also provided.

Abstract: Shaft retaining assemblies for use with fluid valves are described. In a described example, a bonnet assembly for use with a fluid valve includes a bonnet defining a passage to receive at least a portion of a shaft of the fluid valve. The bonnet is to be removably coupled to the fluid valve. Additionally, the example bonnet assembly includes a retaining assembly mounted in the bonnet to be substantially not exposed to a flow of fluid through the fluid valve. The retaining assembly is to control an amount of movement of the shaft along a longitudinal axis of the shaft to enable an alignment of a sealing element coupled to an end of the shaft relative to a seating surface of the fluid valve.

Abstract: A control valve for a fluid flow circuit comprises a body that has a fluid inlet and at least two fluid outlets (20, 22, 24) and that defines an axisymmetric housing for a modulating member capable of rotating about an axis of rotation (XX) and adopting different angular positions to control the distribution of the fluid through the outlets. The body comprises a side wall (16) into which the fluid outlets open. The side wall (16) and/or the modulating member comprises sunken areas (EV) and non-sunken areas (CR), the sunken areas (EV) serving to reduce the surface area of the modulating member (26) in contact with the side wall (16).

Abstract: Actuating device for a gas flow control element arranged in an inflow path of a turbocharger turbine and connected to a spindle traversing a turbine housing wall and fixed to an adjusting element adjoining said wall; a resilient seal pretensioned in the spindle axis direction comprises at least one annular sealing disc traversed by the spindle and being a resilient sheet metal ring is installed between said wall and the adjusting element said ring being pressed with bead feet of at least one annular half bead against an abutment surface fixed relative to the adjusting element and an abutment surface fixed relative to said wall, and the seal together with said abutment surfaces and at least the spindle delimit a space being sealed gastightly except for at least a gap between the spindle and said wall.

Abstract: A system, in certain embodiments, includes a ball valve including a body and a ball disposed within the body. The ball valve also includes a stem disposed within an opening in the ball. The stem is removable by passage through the opening into a bore of the ball.

Abstract: A handle shaft assembly includes a tube spacer, a handle shaft, a stuff box, and an operational handle. The stuff box may be configured for insertion into a through-hole within a bottom loading coupler body and include first and second stuff box ends defining a cylindrical cavity. A first sealing member may be positioned on the first stuff box end, and a second sealing member positioned on the second stuff box end. The tube spacer may be configured to be positioned within a blind counterbore of the bottom loading coupler body. The handle shaft may include a first end positioned within the tube spacer configured to be positioned with a blind bore of the bottom loading coupler body, a linkage section configured to be coupled to a drive linkage of a poppet valve assembly, and a second end extending through the cylindrical cavity of the stuff box. The operational handle is mechanically coupled to the second end of the handle shaft.

Abstract: A housing having at least one valve seat for at least one flap, which is supported so it can rotate on a drive shaft. The drive shaft is guided on at least one side through the housing, a sleeve, through which the drive shaft is rotatably guided, being disposed fixed in place on the inside of the housing in this area. The sleeve has a first area, which faces the flap and encloses the drive shaft with a first slight play. Furthermore, the sleeve has a second area, which faces away from said flap and has a diameter expansion in comparison to the first area and which, on the front side thereof facing away from the flap encloses the drive shaft with a second slight play. Furthermore, the valve is a gas recirculation valve of a motor vehicle.

Abstract: A control valve includes a valve body, a valve stem, and a control element. The valve body receives the stem and includes a packing box housing a packing set. A packing follower includes a bore sized to receive the stem and includes an upper portion, a lower portion, and a bearing surface, the lower portion sized to extend into the valve bonnet to engage the packing set to apply a first compressive force to the packing set, the upper portion including threads and having an upper counterbore housing a secondary seal ring. A nut operatively engages the threads of the upper portion of the packing follower, the nut positioned to apply a second compressive force to the secondary seal ring, and a spring is positioned between the packing flange and the bearing surface of the packing follower, wherein the first compressive force is independent of the second compressive force.

Abstract: The seal (10) for a spray gun (20) is tubular in form and molded from an elastomer. The seal is placed in compression between two generally parallel surfaces (12) so as to seal out the fluid (such as paint) from the rod (14). As the trigger (16) is pulled and the rod (14) moved rearward, the seal (10) bulges to accommodate the travel without exposing the rod (14) to the fluid.

Abstract: Exemplary embodiments are directed to ball valves and associated methods that include a valve body, a ball disposed inside the valve body, a seat retainer, a seat, a stem and a stem bearing. The exemplary seat retainer includes an outer surface with a first outer diameter, a second outer diameter and a transition region connecting the first outer diameter and the second outer diameter in a ramped manner. The exemplary seat includes an annular groove on a seat face to provide two distinct contact points between the seat and the ball. The exemplary stem passes through a valve body opening and is in mechanical communication with the ball. The exemplary stem bearing includes a bore extending therethrough, a first inner diameter, a second inner diameter and a stem bearing transition region connecting the first inner diameter and the second inner diameter in a tapered manner.

Abstract: A valve seal has a sealing lip and a compressible portion. The valve seal is utilized to seal a valve guide and a stem. The valve guide has a height within a predetermined range of heights and the sealing lip sealingly engages the stem. The compressible portion has at least two articulating portions with a hinge portion between the two articulating portions. The compressible portion sealingly engages the valve guide and articulates to accept the valve guide without substantially deforming the lip or interfering with the stem.

Abstract: A control valve includes a valve body, a valve stem, and a control element. The valve body receives the stem and includes a packing box housing a packing set. A packing follower includes a bore sized to receive the stem and includes an upper portion, a lower portion, and a bearing surface, the lower portion sized to extend into the valve bonnet to engage the packing set to apply a first compressive force to the packing set, the upper portion including threads and having an upper counterbore housing a secondary seal ring. A nut operatively engages the threads of the upper portion of the packing follower, the nut positioned to apply a second compressive force to the secondary seal ring, and a spring is positioned between the packing flange and the bearing surface of the packing follower, wherein the first compressive force is independent of the second compressive force.

Abstract: A valve design that enables a positive shaft seal to be obtained in an inexpensive manner by reducing the need for close tolerances heretofore required in prior art designs. This unique valve design employs a shaft seal that is adapted for transverse and/or angular movement during assembly of the valve for aligning to the shaft at an alignment position in which it is held after assembly of the valve by a holding device such as a seal nut or spring.

Abstract: A plate 36 is press-fitted on the outer peripheral surface of a rod 32 to eliminate a gap between the rod 32 and the plate 36, and further the pressurization produced by the pressure of gas leaking from a gas passage 38 and the load of a washer 26 is caused to act on the rod 32 to thereby positively abut the plate 36 united with the rod 32 against a bush 35.

Abstract: Field removable bonnet assemblies for use with valves are disclosed. An example internal valve includes an internal valve body and a field removable bonnet assembly. The field removable bonnet assembly includes a body that is to be removably coupled to the internal valve body and a shaft to be at least partially positioned within the body. The field removable bonnet assembly also includes an adjuster including a first adjuster portion and a second adjuster portion. The body defines a bore having a first diameter portion and a second diameter portion larger than the first diameter portion. The first diameter portion is to receive a valve packing. The second diameter portion to be threadably engaged by the second adjuster portion. The adjuster is externally accessible to adjust the first adjuster portion within the first diameter portion to change a force exerted by the valve packing on the shaft.

Abstract: The present technique provides a system and for improving control of a needle valve in a spray coating device. An exemplary spray coating device of the present technique has a needle valve assembly that controls entry of a fluid to a fluid delivery tip. The needle valve assembly includes an adjustment element that is at least partially located on an exterior of the spray coating device such that the adjustment element is accessible by an operator. The adjustment element may be actuated to improve a seal around the needle so that fluid does not leak from around the needle valve assembly.

Abstract: Field removable bonnet assemblies for use with valves are described herein. An example field removable bonnet assembly for use with internal valves includes a body that is to be removably coupled to the internal valve. The body defines a bore that is to receive a valve packing. Additionally, the field removable bonnet assembly includes a shaft having a cam assembly that is to rotatably engage a stem of the internal valve. The shaft is rotatably coupled to the body and the shaft is at least partially positioned within the bore. Further, the field removable bonnet assembly includes a removable adjuster that is externally accessible to enable an adjustment of the removable adjuster relative to the body to change a force exerted by the valve packing on the shaft. The removable adjuster is field removable to replace or repair the valve packing.

Abstract: A stemmed control valve having a housing containing a first packing assembly that is compressively loaded externally of the housing, and a second packing assembly that is independently compressively loaded in a fixed manner internally of the housing.

Abstract: A shaft seal packing exhibits high sealability at the time of initial assembly and also exhibits, even after the packing is retightened, excellent sealability by an increased seal surface pressure obtained through an effect of pressing and by self-sealability obtained through an effect of fluid pressure. A shaft seal structure for a valve includes a body for a valve, a valve shaft, a valve disc disposed within the body so as to be rotatable or capable of ascending and descending, a valve shaft seal chamber having the valve shaft axially attached thereto, a shaft seal packing that is attached to the shaft seal chamber and comprises annular packing bodies stacked and substantially V-shaped in cross section, with stacked layer faces on the inner-diameter side of the packing bodies brought into tight contact with one another and stacked layer faces on the outer-diameter side of the packing bodies formed with prescribed gaps between the adjacent stacked layer faces.

Abstract: An actuator (1) is fixed on a valve (2) through a fixing joint (3) which comprises a tubular sleeve (32) on which a tightening nut (30) is screwed; the nut (30) and the sleeve (32) are provided with a conical thread connection (34, 300); by screwing the nut (30), a plurality of longitudinal prolongations (40), arranged in a crown around the axis of the sleeve (32), tightens on a fixing head (20) of the valve (2), firmly fixing the actuator (1) to the valve (2); the joint at issue provides an alternative to a flange connection, equally solid and resistant to unscrewing due to vibrations; by resting against a mechanical stop surface (24) the nut (30), being unscrewed, can act as an extractor that easily removes the joint (3) from the head (20).

Abstract: A valve design that enables a positive shaft seal to be obtained in an inexpensive manner by reducing the need for close tolerances heretofore required in prior art designs. This unique valve design employs a shaft seal that is adapted for transverse and/or angular movement during assembly of the valve for aligning to the shaft at an alignment position in which it is held after assembly of the valve by a holding device such as a seal nut or spring.

Abstract: A leak-proof structure of an oil pipe connector includes: a connector cylinder, being a hollow housing, and having an oil inlet at a front end, and an oil outlet at a rear end, and a switch base interconnected to a shaft hole in the connector cylinder; a control device, installed in the connector cylinder; a switch device, having a transmission shaft, inserted into the shaft hole and linked with the control device, and a switch handle coupled to the top of the transmission shaft; a leak-proof device, having a bearing slot below the shaft hole, and a first leak-proof slot, a circular latch slot and a second leak-proof slot above the leak-proof device, and a bearing being disposed below the bearing slot, and a first O-ring, and a latch ring, a second O-ring for achieving a leak-proof effect.

Abstract: A valve assembly includes: a valve body defining an annular shoulder that is formed with an annular shoulder groove; a hollow ball member disposed in the valve body; a sealing unit including an O-ring received in the shoulder groove and protruding outwardly of the shoulder groove; a stem extending into the valve body to connect with the ball member and formed with an annular flange seated on the O-ring; an annular packing seated on the annular flange; and an annular pressing member defining an annular neck that cooperates with the annular shoulder to sandwich the annular flange, the O-ring and the annular packing therebetween. The pressing member is coupled adjustably to the valve body, and is adjustable to move toward and away from the O-ring.

Abstract: The invention relates to a drainage assembly of the type having an upward opening for the draining opening of a new or existing chemical reactor, particularly of the enameled type, characterized in that the outer outlet opening (6) for the drainage is provided in the lower portion thereof with a removable seat part in the form of a planar annual seal (11) having an upper portion with at least one recess (21) used as a seat for the under-face of the head (10) of the valve and as a full flow ramp. The invention is particularly intended for the manufacturers and users of chemical reactors, in particular of the enameled type.

Abstract: A biasing apparatus includes a first spring seat that has a first seating surface and a first protruding member extending a predetermined distance from the first seating surface and a second spring seat that has a second seating surface and a second protruding member extending a predetermined distance from the second seating surface. The first and second protruding members engage to slidably couple the first and the second spring seats.

Abstract: A valve assembly for use in a piping system includes a valve having an inlet and outlet arranged for connection to the piping system, and further includes a valve body, a control element disposed in a flow passage, and a shiftable valve stem operatively coupled to the control element. Valve packing is disposed about the valve stem and is secured by a retainer assembly. An adapter plate is provided and is attached to the valve body by a plurality of gland bolts, with the adapter plate and the gland bolts cooperating to secure the retainer assembly. An actuator bracket is provided and includes a first portion and a second portion, with the first portion secured to the adapter plate by a plurality of fasteners, and an actuator is secured to the second portion of the actuator bracket by a plurality of fasteners, with the actuator having a control rod operatively coupled to the valve stem.

Abstract: A valve shaft 8 and a drive shaft 11 of an EGR valve 1 are butted to each other; protrusions 26a, 26b, 27a, and 27b formed on the inner sides of cotter members 24, 25 of a cotter 23 are engaged with grooves 21, 22 respectively formed on the outer peripheral surfaces of the ends of the shafts 8, 11; the urging force of a spring 28 for exerting an urging force in the closing direction of valve disks 6, 7 on the cotter 23 is applied to the cotter 23 through a spring holder 30 to press the protrusions 26a, 26b, 27a, and 27b to the grooves 21, 22.

Abstract: A packing nut assembly for a control valve having a valve body and a valve stem includes a packing box arranged for operative coupling to the valve body and having a primary bore sized to receive the valve stem and first and second counterbores. The first counterbore is sized to receive valve packing and the second counterbore includes internal threads. A packing nut having a central bore is sized to receive the valve stem and includes a threaded outer surface positioned to engage the second counterbore of the packing box. The packing nut includes an adjustment surface positioned to face the first counterbore, and includes an adjustment head having a plurality of tool-receiving apertures sized to receive an adjustment tool.

Abstract: A device in a valve (1) includes a valve housing (2) with at least a first (3) and a second (4) fluid port. A closure element (5) including a sealing portion (15) and diaphragm (30) is arranged in the valve housing (2). The sealing portion (15) is movable between an open position and a closed position. The closure element (5) and valve housing (2) form a flow passage (11) which communicates with the fluid ports when the sealing portion (15) leaves the closed position. A second sealing portion (14) is arranged in contact with a support portion (25) of the valve housing (2). An abutment element (16) is arranged in contact with the second sealing portion (14). The abutment element (16) transmits a force via the second sealing portion (14) toward the support portion (25) to provide a seal. The force is at least partly exerted by a spring element.

Abstract: An intake controller includes a casing defining an intake passage that communicates with a combustion chamber of an engine, a valve received in the casing to open/close the passage, a rotational shaft that changes an opening degree of the valve, an actuator having a gear that drives the valve through the shaft, a gear retaining member retaining the gear, a sensor including a magnet that rotates according to rotation of the shaft and a magnetic detection element that detects magnetic flux generated from the magnet, and a sensor retaining member retaining the sensor. The sensor detects the opening degree of the valve based on a change of density of the magnetic flux passing through the element. One of the gear and the gear retaining member, and one of the sensor and the sensor retaining member are separately fixed on the shaft.

Abstract: A replaceable valve shaft sealing system is disclosed that enables the operator to greatly reduce the maintenance needs of valves where rotational movement of a shaft, that is connected to the actual metering apparatus of the valve, actuates the opening or closing of the valve thereby regulating fluid flow. The design of the shaft enables the user to replace the valve stem and associated sealing rings or to re-lubricate the shaft, while the valve is connected to the line, by simply removing the packing nut. There are no-preloaded sealing devices that require re-construction. Prior art designs use O-rings to prevent the seepage of fluid into the valve body and though the rotating shaft, but the disclosed shaft prevents contamination of the lubrication into the fluid flow and eliminates any of the axial loads that can cause O-rings to fail using the prior art designs.

Abstract: Disclosed is a seal structure of a high-pressure tank capable of properly securing seal efficiency. The seal structure of the high-pressure tank includes a plurality of seal members that have mutually different seal properties and that are installed between a ferrule of the high-pressure tank and a valve body attached to the ferrule. One of the plurality of seal members has low temperature resistance, and the other has high temperature resistance. A first seal member is an O-ring formed of butyl rubber or silicone. A second seal member is an O-ring formed of EPDM. Furthermore, the two O-rings are different in gas permeability from each other. This seal structure can be applied between the ferrule and the valve body, in addition, between the ferrule and a liner, between the ferrule and a shell, and between the valve body and the shell.

Abstract: A control valve includes a valve body, a valve stem, and a control element. The valve body receives the stem and includes a packing box housing a packing set. A packing follower includes a bore sized to receive the stem and includes an upper portion, a lower portion, and a bearing surface, the lower portion sized to extend into the valve bonnet to engage the packing set to apply a first compressive force to the packing set, the upper portion including threads and having an upper counterbore housing a secondary seal ring. A nut operatively engages the threads of the upper portion of the packing follower, the nut positioned to apply a second compressive force to the secondary seal ring, and a spring is positioned between the packing flange and the bearing surface of the packing follower, wherein the first compressive force is independent of the second compressive force.

Abstract: A valve packing assembly for a control valve includes a seal assembly, a loading assembly, and a packing retainer. The seal assembly has a seal component to provide a fluid seal around a valve stem and an anti-extrusion component to substantially prevent extrusion of the seal component about the valve stem. The loading assembly is configured to advantageously provide a predetermined packing stress to the seal assembly that is in the same direction as a process stress applied to the seal assembly by a process fluid, thereby substantially reducing packing friction and packing wear in the control valve assembly.

Abstract: To prevent formation of a gap between the upper surface of a packing gland and the lower surface of a yoke sleeve even when the packing gland is lowered. A valve stem is journaled in a journaling portion of a valve box in an upwardly and downwardly movable manner; a packing is interposed between the journaling portion of the valve box and the valve stem; a packing gland which presses the packing is arranged above the packing; a yoke sleeve inserted into a yoke portion of the valve box and screwed into the valve stem is provided above the packing gland; and a valve seat in the valve box is opened and closed with a valve element provided at the lower end of the valve stem by rotating a handle fitted into the yoke sleeve to move the valve stem upward and downward. A protective tube formed integrally with the packing gland is provided between the packing gland and the yoke sleeve around the valve stem.

Abstract: The present invention is directed toward an anti-contamination arrangement for a valve having a valve housing, a bushing positioned in the valve housing, a valve member including a valve shaft and a valving portion operable for engaging a valve seat, slidably disposed through the bushing, and a supply port operably associated with the valve member. The valve also includes a control chamber controlled by the valving portion, and a valve seat positioned between the supply port and the control chamber. The valve member is operably associated with the valve seat for controlling the flow of fluid from the supply port to the control chamber upon the movement of the valve member in relation to the valve seat. There is also an anti-contamination arrangement positioned between the bushing and the valve shaft for collecting and removing contamination from the valve member.

Abstract: Methods and apparatus for adjusting a spring load in an actuator are described. An example actuator includes a housing and a plate. Further, the example actuator includes one or more springs disposed in the housing to apply a force to the plate. Additionally, the example actuator includes a spring load adjuster having a collar extending through and movably engaged to the plate to enable an adjustment of the position of the collar relative to the plate to change a load provided by the one or more springs.

Abstract: Shaft retaining assemblies for use with fluid valves are described. In a described example, a bonnet assembly for use with a fluid valve includes a bonnet defining a passage to receive at least a portion of a shaft of the fluid valve. The bonnet is to be removably coupled to the fluid valve. Additionally, the example bonnet assembly includes a retaining assembly mounted in the bonnet to be substantially not exposed to a flow of fluid through the fluid valve. The retaining assembly is to control an amount of movement of the shaft along a longitudinal axis of the shaft to enable an alignment of a sealing element coupled to an end of the shaft relative to a seating surface of the fluid valve.

Abstract: A gasket for a valve in an internal combustion engine is provided with a support element having a tubular configuration according to an axis and coaxially mounted on the valve. An elastically deformable element is interposed between the support element and the valve. The support element includes a first portion elongated according to the above mentioned axis, and a second portion extending from the first portion in a direction transversal to the axis, at least partially housed in an annular seat of the elastically deformable element and having its radially outermost end connected to the first portion itself. The support element comprises a third portion extending from the radially innermost end of the second portion and folded on the second portion itself so as to generate, in the folding area, a rounded edge cooperating with the annular seat of the elastically deformable element.

Abstract: In a flow amount control valve, a rod is inserted through the interior of a housing, and first and second connecting members are connected coaxially to both ends of the rod. A first bellows and a second bellows, each having a bellows portion, are provided on the rod, for preventing leakage of fluid that is introduced into the interior of the housing. In addition, the first bellows and the second bellows are expanded and contracted by displacement of the rod along the axial direction, which is caused by driving an actuator, such that a valve element of the rod approaches and separates with respect to a valve seat, and a gap between the valve element and the valve seat changes so that a flow amount of the fluid is controlled.

Abstract: A seal for a vessel is disclosed which militates against a leakage of fluid during expansion and contraction of the vessel due to changes pressure and temperature. Inner sealing surfaces of the seal form substantially fluid-tight seals in response to at least one of temperatures below a predetermined temperature and pressures below a predetermined pressure and outer sealing surfaces of the seal form substantially fluid-tight seals in response to at least one of temperatures above the predetermined temperature and pressures above the predetermined pressure.

Abstract: A miniature needle valve having an improved internal body-to-bonnet metal-to-metal seal. The body seal incorporates a novel dovetail feature that improves the metal-to-metal contact forces as pressures increase. The space requirements of the seal are minimized in order to fit within a miniature valve body. The valve body can use dual outlet passageways to further minimize space requirements and improve the valve's flow characteristics. The body-to-bonnet seal improvements increase the pressure limits of the valve beyond similar-sized miniature needle valves of the prior art.