Abstract: Embodiments of an apparatus for sealing a substrate transfer passage in a chamber are provided. In one embodiment, an apparatus for sealing a substrate transfer passage in a chamber includes an elongated door member coupled to an actuator by a ball joint. The ball joint is configured to allow movement of the door member relative to the lever arm around a center of the ball joint. In one embodiment, a sealing face of the elongated door is curved. In another embodiment, the chamber is one of a chemical vapor deposition chamber, a load lock chamber, a metrology chamber, a thermal processing chamber, or a physical vapor disposition chamber, a load lock chamber, a substrate transfer chamber or a vacuum chamber.

Abstract: A valve seat apparatus for use with fluid valves is described. An example valve seat apparatus includes a flexible seal disposed between a cage and a valve body such that an outer seating surface of a closure member slidably coupled to the cage slidingly engages the flexible seal to prevent fluid flow through the valve body when the valve is in a closed position and an end of the closure member is not driven into abutting engagement with another seating surface when the valve is in the closed position.

Abstract: A suction valve including a valve seat and guide assembly with a seat portion and a guide portion. The seat portion has an outer ring and a peripheral flange projecting outwardly from the bottom of the outer ring. The outer ring has an inner surface with a top part sloping downwardly and inwardly toward the center of the outer ring. The outer ring also has an outer surface that slopes upwardly and inwardly from the flange. The guide portion has an inner ring positioned within the outer ring and a number of spaced-apart fins connecting the inner ring to the outer ring. A piston has a head that engages the top part of the seat portion and a stem that extends downwardly from the head and through the inner ring of the guide portion. The stem also has a peripheral groove therein. A valve keeper is fitted upon the stem such that the inner ring is positioned between the top part of the seat portion and the valve keeper. The valve keeper has a recess in the bottom thereof.

Abstract: An expansion valve includes a valve body 1. The valve body 1 includes a first throttle 5 and a second throttle 6 arranged downstream from the first throttle 5. The second throttle 6 includes an outer surface of the second valve portion 16 and an inner surface of the second valve hole 13. A helical groove or a linear groove is formed in the outer surface of the second valve portion 16 or the inner surface of the second valve hole 13. Further, at least either one of the outer surface of the second valve portion 16 and the inner surface of the second valve hole 13 is tapered toward a distal end of a valve member 4.

Abstract: Redundant metal-to-metal seals for use with internal valves are described. A plug having redundant sealing functionality for use with a poppet of an internal valve includes a tapered surface to sealingly engage a seat of the poppet. Additionally, the plug includes a seal adjacent the tapered surface and disposed in a groove defined by the plug to sealingly engage the seat.

Abstract: A piezoelectric microvalve employs a valve element formed of hermetically sealed and opposed plates flexed together by a cross axis piezoelectric element. Large flow modulation with small piezoelectric actuator displacement is obtained by perimeter augmentation of the valve seat which dramatically increases the change in valve flow area for small deflections.

Abstract: A turret for an article processing machine assembly includes a turret main body, a sliding ram assembly, and an air manifold device. The air manifold device is connectable to the turret main body and provides pressurized air through a pressurized air pathway system. The pressurized air pathway system includes a turret air passage extending from the air manifold through the turret body to the sliding ram assembly, and a ram air passage that supplies the pressurized air to an article in the machine assembly. A valve mechanism is positioned between one end of the turret body air passage and a first end of the ram air passage. The valve mechanism includes a slidable disc that seals the connection between the turret body air passage and the ram air passage.

Abstract: A water outlet chamber-type regulating device includes a chamber component having an inlet and an outlet for a fluid to be regulated, and including a member for regulating the flow, the member having a valve component translatingly movable and configured to close a passage cross-section between the inlet and the outlet, and is rigidly fixed to a control shaft. The chamber component includes at least one opening formed in its lateral wall, and the control shaft carries a second closing component, which is integral in translation with the shaft and is positioned on the shaft and has a shape that is configured to regulate the flow of water passing through the opening as a function of the regulation of the flow in the region of the passage cross-section.

Abstract: A valve includes a generally elongate pintle; a spacer having a rounded surface that bears against the pintle; a bulbous tip fixed to the spacer; and a hollow, generally cylindrical collar fixed to the pintle, the collar enclosing the spacer and the tip and including an opening through which a portion of the tip extends, the opening in the collar and interior of the collar being of a size such that the tip floats therein.

Abstract: A valve in which durability of a sealing member made from an elastic material can be increased and sealing capability can be advantageously maintained over a wide range from a large differential pressure to a low differential pressure. A valve (100), in which a valve disc (1) and a valve seat (2) are brought into close contact via a sealing member (5) composed of an elastic material and provided at the valve disc (1) or valve seat (2), comprises a throttle section (30) defined by the shape of at least one of the valve disc (1) and valve seat (2). The throttle section (30) narrows a flow passage formed between the valve disc (1) and valve seat (2) and is provided near the sealing member (5). The flow passage narrowed by the throttle section (30) is so set that narrowing preferentially proceeds in the flow passage in close proximity to the sealing member (5) during the closing operation of the valve disc (1).

Abstract: A piston, which is displaceable by pilot air, is provided in a main body. A valve plug, which is composed of a resin material, is connected to an end of a shaft connected to the piston. The valve plug is seated on a valve seat section of a sub-body connected to the main body, and thus the flow of the paint to a flow passage is cut off. A seating section of the valve plug, which is to be seated on the valve seat section, is formed to be substantially spherical. Further, the surface of the valve seat section is recessed and substantially spherical corresponding to the seating section.

Abstract: A thermal deburring apparatus has a pressure-tight closeable deburring chamber connected to an environment via a ventilation passage having a passage direction; a ventilation valve closing said ventilation passage and having a stationary valve seat encompassing said ventilation passage, a valve tappet that is movable in said passage direction, and a seal affixed to said valve tappet.

Abstract: The valve sealing system for a reagent package includes an annular cylindrical gasket seated in a channel formed in the package. A rocker valve on the package pivots relative to the annular cylindrical gasket which surrounds an opening to the chamber of the reagent package. The annular channel includes a radially inner peripheral channel sidewall, a radially outer peripheral channel sidewall, and a bottom portion. An inclined peripheral wall portion of the channel intersects one of the channel sidewalls at an obtuse angle and the bottom portion of the channel. When the rocker valve is in a valve closed position it engages the annular cylindrical gasket to provide a substantially leak-tight seal.

Abstract: A valve assembly has a valve body having an upper portion defining an upper chamber having an upper valve seat, and a lower portion defining a lower chamber having a lower valve seat, with an intermediate seat region between the upper valve seat and the lower valve seat. An upper valve stem is movable between a closed position seated against the upper valve seat and an open position spaced apart from the upper valve seat, and a lower valve stem is movable between a closed position seated against the lower valve seat and an open position spaced apart from the lower valve seat. A blocking ring is disposed in between the upper valve stem and the lower valve stem, and in contact with the intermediate valve seat. When the upper valve stem is open and the lower valve stem is closed, fluid escaping the upper chamber impinges on the blocking ring. When the upper valve stem is closed and the lower valve stem is open, fluid escaping the lower chamber impinges on the blocking ring.

Abstract: The invention relates to an expansion valve, in particular for a vehicle air-conditioning system operated with cooling medium, with a valve seat (37) and a valve-closing element (39), which closes a passage opening (44) between a cooling medium inlet opening (14) and a cooling medium outlet opening (16), and with an actuating device (46) which acts on the valve-closing element (39) and opens and closes the passage opening (44), a shortened maximum working lift for opening the valve-closing element (39) out of the valve seat (37) being provided, at which a ball seat cross section formed between valve-closing element (39) and valve seat (37) is designed to be smaller than an annular gap cross section formed between a transmission pin (47) of the actuating device (46) and a passage opening (44).

Abstract: An apparatus for controlling medium flow, especially for controlling dilution liquid flow in connection with the headbox of a paper-making machine or a cardboard-manufacturing machine, which apparatus comprises a valve which controls dilution flow, which valve consists of a valve housing, a stem part and a flow channel between an inlet and an outlet of the valve. The stem part is movable in the housing between at least two positions, a first position in which the flow path between the inlet and the outlet is open, and a second position in which the flow path is closed, and the stem part and/or housing is designed to direct the medium flow at least in the vicinity of the outlet opening.

Abstract: A ball seat valve, use thereof, and method for controlling a valve assembly comprising a ball seat valve, wherein the valve body has a chamber and a plurality of inlet openings in the chamber. The inlet openings together have an inflow area leading into the chamber through which a medium can flow, and wherein the medium flows through said openings simultaneously as these are connected to one another in parallel. The valve has a seat with an outlet opening leading out of the chamber through the valve body, and wherein the outlet opening has an outflow area leading out of the chamber through which the medium can flow. Additionally, the valve has a ball which is situated in the chamber so as to be displaceable to open up or block the outlet opening. It is advantageous that the plurality of inlet openings comprise more than 10, especially more than 50, individual such inlet openings, resulting in a decrease in pressure between the inflowing medium outside and that inside the chamber.

Abstract: A diaphragm membrane (212) is disclosed that has a shape that spring loads a diaphragm during assembly to provide a default position for the diaphragm. The diaphragm membrane (212) is made from a resilient material. The diaphragm is spring loaded during assembly to provide a force that returns the diaphragm to the default position.

Abstract: A valve body substantially symmetrical about a longitudinal axis has at least one internal space and comprises guide means and two separately formed portions joined by at least one cylindrical web. One or more passages spaced apart from the longitudinal axis allow fluid communication between at least one internal space and space external to the valve body. At least one internal space may be substantially filled with a substantially incompressible flowable substance to facilitate pressure equalization across the valve body. Forging or casting valve body portions to near-net-shape prior to joining minimizes machining necessary to achieve a final desired shape. Increased valve durability and reduced metal wear arise from reduced valve body weight and correspondingly reduced impact loading as the valve body moves to seal against a valve seat. Valve sealing may be aided by an elastomeric seal in a peripheral integral seal retention groove of the valve body.

Abstract: A bit assembly is for a percussive drill that includes a casing with an interior chamber and includes a bit connectable with the casing and having a longitudinal bore and an axis through the bore. The bore has a retainer portion with one or more generally. conical inner surfaces extending circumferentially about and facing generally toward the axis. A generally cylindrical valve has a longitudinal passage with an inlet fluidly connectable with the casing chamber and an outlet fluidly connectable with the bit central bore and an axis through the passage. An engagement portion with at least one generally conical outer surface extends circumferentially about and faces generally away from the valve axis. The valve engagement portion is disposable within the bit bore retainer portion such that the valve conical outer surface is disposed within and against the bit conical inner surface to retain the valve coupled with the bit.

Abstract: A method of designing a minute flow rate controller that is capable of accurately controlling the minute flow rate of a fluid and realizing desired valve characteristics without inducing any unsteadiness of fluid flow and has a simple configuration with respect to a throttle groove for controlling the fluid flow rate.

Abstract: A valve for a compressed gas container, with a longitudinal valve housing, which is held in a valve disc at one end and surrounds a channel for the medium which is to be discharged, a valve member, which is partly arranged in the channel of the valve housing and projects from the valve housing at the held end thereof, a sealing element, which sealingly encloses the valve member and whose position on the valve housing is fixed, wherein the valve member features an outlet channel, which can be brought into connection with the channel of the valve housing via at least one cross bore, wherein the outlet channel features a bore on its bottom, via which the outlet channel of the valve member is in connection with the channel of the valve housing, wherein the bore is closed by a spring prestressed valve body, which is lifted from the bore against the spring force upon a predetermined pressure in the channel of the valve housing and unblocks a direct connection between the channel of the valve housing and the outlet

Abstract: The present invention relates to a porous adaptive membrane structure that has movable membranes. The structure can be made to change its gas, liquid or particulate permeability in response to surrounding environmental conditions. The application of this invention is includes protective apparel that is comfortable to wear wherein the level of protection provided is based on conditions in the environment. Hence, the protective apparel is highly breathable and comfortable in a non-hazardous environment but impermeable or only semipermeable in a hazardous environment.

Abstract: A valve for controlling fluid flow comprising a body (100) provided with a fluid passageway having an inlet (10) an outlet (90), a valve member for inhibiting fluid flow through the passageway, and means for moving the valve member (40, 50) so as to provide for controlled flow of fluid from the inlet to the outlet, wherein the valve member is in the form of a blade, one end of which is mounted at a location (41, 51) remote from the passageway; and wherein the means (60) of moving the valve member is arranged to act on the other end of the blade whereby to control fluid flow through the passageway.

Abstract: A valve in which durability of a sealing member made from an elastic material can be increased and sealing capability can be advantageously maintained over a wide range from a large differential pressure to a low differential pressure. A valve (100), in which a valve disc (1) and a valve seat (2) are brought into close contact via a sealing member (5) composed of an elastic material and provided at the valve disc (1) or valve seat (2), comprises a throttle section (30) defined by the shape of at least one of the valve disc (1) and valve seat (2). The throttle section (30) narrows a flow passage formed between the valve disc (1) and valve seat (2) and is provided near the sealing member (5). The flow passage narrowed by the throttle section (30) is so set that narrowing preferentially proceeds in the flow passage in close proximity to the sealing member (5) during the closing operation of the valve disc (1).

Abstract: A self-aligning poppet valve assembly is disclosed. The self-aligning poppet valve assembly is disposed within the inner wall of a conduit and comprises a movable sealing member having a poppet guide, a seat portion comprising an inner receptacle adapted to receive the moveable sealing member, a sealing flange adapted to contact the moveable sealing member, thereby selectively inhibiting fluid flow past the moveable sealing member, and a guide receiving portion coupled the poppet guide, and a sealing device surrounding the seat portion and adapted to maintain a seal between the seat portion and the inner wall of the conduit.

Abstract: An air discharge valve for a bedclothes compressing-and-storing bag includes a lower main body having an air passage and a packing-receiving groove. An upper body is coupled to the lower main body to define an internal space. The upper body has a plurality of air discharge holes and a central guide opening. A valve body positioned in the internal space and slidably inserted into the guide opening of the upper body for movement between an open position and a closed position. A packing is fitted to the packing-receiving groove of the lower main body, the packing provided with an outer flange portion and an inner flange portion. A top cover is fitted to the valve body for movement together with the valve body, the top cover shaped and sized to close off the air discharge holes of the upper body when the valve body is in the closed position.

Abstract: A valve body and seal assembly comprises a valve body having one or more circumferential seal retention grooves and a dual-durometer elastomeric seal cast-in-place in at least one groove. Each seal comprises first and second sections in contact along a substantially non-planar intra-seal interface. First seal sections typically comprise polyurethane having a higher modulus than the polyurethane typically comprising second seal sections. Residual elastomer shrinkage stress present after curing of a cast-in-place dual-durometer elastomeric seal is redistributed within the seal sections to maintain beneficial preload. Seal configurations described herein are also associated with decreased shear-related elastomer fatigue and extrusion damage associated with repeated valve seat impact. Valve service life is increased by beneficial preload maintained by the synergistic interaction of first and second seal sections.

Abstract: Apparatus to align a closure member and valve stem for use with valves are described. An example valve includes a stem and a closure member having a first aperture to receive at least a portion of the stem. The example valve further includes a positioning member that has a first portion and a second portion. The first portion has a first cross-section and the second portion has a second cross-section that is greater than the first cross-section and an area between the first portion and the second portion forms a positioning surface to engage the first aperture of the closure member to align the stem and the closure member. A fastening member couples the stem to the closure member.

Abstract: Hot-isostatic-pressure (HIP) is used to make substantially nonporous cemented carbide inlays on metal substrates. A radiused shell preform typically comprising at least one metal carbide and at least one nonvolatile cement is shaped as a rigid frusto-conical shell having a substantially uniform thickness and a predetermined radius on every edge. HIP pressure is applied via a conforming adjustable sliding element to compress the preform against a conforming substrate. Surfaces of the conforming adjustable sliding element and conforming substrate, and/or the radiused shell preform, may in certain embodiments be coated substantially uniformly with at least one nonvolatile cement. Space around a radiused shell preform is evacuated without the need to totally enclose the radiused shell preform and its substrate in a can. Certain embodiments provide for leak testing of welded seals prior to application of HIP, and other embodiments make the use of welded seals unnecessary.

Abstract: Embodiments of the invention are directed to a valve. In one embodiment, the valve includes a body having a first biasing member and a sealing member configured to axially move inside the body against the first biasing member to provide a path for fluid to flow from an interior region of the body to an exterior region of the body at a first predetermined pressure difference across the sealing member.

Abstract: A compact flow control valve with high flow stability is arranged to comprises: a valve body made of resin including; a first passage formed in the valve body; a valve port communicating with the first passage; and a valve seat formed around the valve port; a valve element movable into contact with and away from the valve seat; a valve chamber formed around the valve seat; a second passage communicating with the valve chamber; and a flow adjustment rod for adjusting a flow rate of a fluid allowed to flow in the valve chamber, wherein the flow adjustment rod is adjustable in position to change an opening degree of the valve element relative to the valve seat for adjusting the flow rate, and the flow control valve further comprises an annular recess formed in an inner periphery of the valve seat formed surrounding the valve port and configured to prevent radial deformation of the valve port when the valve element is moved into contact with the valve seat.

Abstract: A valve including an elastically deformable component is disclosed, wherein the elastically deformable component is disposed in one of a valve head and a valve body, and wherein the elastically deformable component is elastically deformed when the valve is in a closed position to facilitate a substantially fluid tight seal between the valve head and the valve body.

Abstract: A steam valve 1 includes: a valve seat 9 being accommodated in a steam flow path of a casing 2 provided with a steam inlet pipe 14 and a steam outlet pipe 15; and a valve body 22, 27 capable of contacting the valve seat 9, the valve body 22, 27 being accommodated in the steam flow path of the casing 2. An expansion part 10 that smoothly projects toward an inside of the steam outlet pipe 15 is disposed at a downstream side on a contact surface of the valve seat 9.

Abstract: A valve structure includes a valve opening diaphragm and a valve diaphragm. The valve opening diaphragm provides a central valve opening with a plurality of wave shaped projections at the circumference of the valve opening. The valve diaphragm stacks on the valve opening diaphragm and providing at least a pair of elongated circular grooves. The pair of circular grooves is symmetrically disposed with respect to the center of the valve diaphragm and an area enclosed by the pair of circular grooves covers the valve opening.

Abstract: A valve body and seal assembly comprising a valve body having one or more peripheral integral seal retention grooves and one or more peripheral single-durometer and/or dual-durometer elastomeric seals, each seal being cast-in-place in an integral seal retention groove having adhesion-inhibiting surfaces and offset circular serrations of predetermined height on opposing groove walls. Adhesion-inhibiting surfaces reduce or eliminate internal elastomer stress due to curing of cast-in-place elastomeric seals. Serrations on each of the opposing groove walls are offset to accommodate differing stress concentrations in the walls. Opposing groove walls diverge peripherally. Offset serrations result in decreased metal fatigue from impact and bending stress. Offset serrations also improve valve sealing and increase valve service life by maintaining correct seal position on the valve body while minimizing background stress in the seal elastomer(s).

Abstract: Embodiments of an apparatus for sealing a substrate transfer passage in a chamber are provided. In one embodiment, an apparatus for sealing a substrate transfer passage in a chamber includes an elongated door member having a concave sealing face coupled to an actuator by a flexible coupling. The flexible coupling configured to allow movement of the door member relative to the lever arm in at least two planes.

Abstract: The invention relates to a fuel injection valve for fuel injection systems of self-igniting air-compression internal combustion engines. The fuel injection valve comprises an actuator, housed in a valve chamber, and a valve closing element that is actuated by the actuator by means of a valve needle. The valve closing element interacts with a valve face to give a sealing seat. The valve also comprises a transition piece that is attached to the actuator, and an expandable hose encompasses the periphery of the actuator and a part of the transition piece. The expandable hose is connected to the transition piece in an area of fastening.

Abstract: A self-cleaning valve assembly is provided, such as for use in a vacuum cleaner such as a particularly advantageous vacuum cleaner system that has at least two filters and self-cleans its filters via back-flushing, without needing to stop normal operation to self-clean. Also, a vacuum cleaner is provided that uses permanent, self-cleaning filters, and does not need disposable filters or filter bags, and advantageously can use inexpensive plastic bags. In another vacuum cleaner system, waste is collected in an ordinary plastic bag without any special preparation or modification of the bag being needed. Further, an inventive self-cleaning X-valve assembly cleans itself and is useable in the vacuum cleaner system.

Abstract: Means for attenuating the seating force of a cam-actuated poppet valve such as an exhaust gas recirculation valve in an internal combustion engine including a shock-absorber disposed between the valve stem and valve head. In a currently preferred embodiment, the shock-absorber is a wave washer disposed around the valve stem and captured between the valve stem and the valve head, between which axial motion is allowed. After the valve head engages the valve seat to close the valve, any further travel of the actuator cam and valve stem is absorbed by compression of the wave washer, thus attenuating additional force on elements of the valve actuation train. In opening the valve, the reverse occurs, in that initial motion of the actuator cam and valve stem serves to relieve compression of the wave washer, followed by removal of the valve head from the valve seat.

Abstract: A diaphragm valve includes a valve body defining a passageway constructed to form a valve seat, and a diaphragm. A compressor moves the diaphragm between a closing position in which a flow of fluid through the passageway is barred as the diaphragm is caused by the compressor to seal the valve seat, and an open position in which at least part of a cross section of the passageway is bounded by the diaphragm to thereby enable a flow of fluid through the passageway substantially without narrowing the cross section of the passageway.

Abstract: A fluid control valve comprises a diaphragm formed of a plurality of circular thin metal plates laminated one on another, the diaphragm being placed to be movable into or out of contact with a valve seat for closing and opening the valve. Each thin metal plate has a warp in a predetermined direction due to rolling anisotropy, and the thin metal plates are laminated with the directions of respective warps coinciding with one another in such a manner that variations in lift amount of the diaphragm are decreased.

Abstract: In order to reduce the wear at the spring ends of the valve spring arranged in a spring cup to the greatest possible extent and to increase the lifetime, in particular of the valve springs, the invention proposes to form the internal contour 22 of the spring cup 17 so as to open in the shape of a calotte.

Abstract: A rubber (elastic substance) is attached by vulcanization and an annular sealing member 4 is formed in an annular groove 3 having a step and provided in the bottom wall of a body 2 of a valve disc 1. The sealing member 4 has an annular portion 41 and an annular portion 42. Most of the annular portions 41, 42 are located in a deep groove portion 31 and a shallow groove portion 32, respectively, and the volume of the annular portion 41 is larger than the volume of the annular portion 42. Furthermore, an annular protrusion 43, which protrudes downward, is provided in the boundary region between the annular portions 41, 42. An inclined section that is inclined at the prescribed inner angle Q is also formed in the boundary region.

Abstract: The invention relates to a ball poppet valve having a valve body, a cylindrical valve bore disposed in the valve body, a ball poppet for closing the valve bore and a movable control stem intruding into the valve bore. The control stem acts on the ball poppet, and the control stem has a diameter (d) that at least approximately becomes larger and larger in the direction towards the ball poppet.

Abstract: A valve assembly including a valve body having a bore and a port extending to the bore, an orifice member received in the bore and having an end wall and a side wall, and wherein the end wall defines an orifice providing fluid communication with the port of the body. A valve member is received in the orifice member and is movable along an axis with respect to the orifice, and a flat spring is secured to the side wall of the orifice member and has arms secured to the valve member. A valve seat is secured to the end wall and defines an opening over the orifice, and a plug is secured to an end of the valve member opposite the valve seat such that, when the valve member is moved along the axis towards the orifice, the plug contacts the seat to seal the opening.

Abstract: A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number of vertical passages each of which intersect one of the horizontal passages and contains a suction valve at its bottom and a discharge valve at its top. A suction manifold is hingedly attached to the bottom of body to provide a flow of fluid into the body via the suction valves. A discharge passage intersects the vertical passages and receives fluid pressurized by the plungers via discharge valves and ports such from the fluid end.

Abstract: A pump comprising a piston in communication with a valve chamber provided with a first valve seat and a second valve seat, and a resilient valve element comprising a first tapered portion, a second tapered portion and a flange portion extending from a periphery of the first tapered portion, in which the flange portion co-operates with the first valve seat to form an inlet valve, and the second tapered portion co-operates with the second valve seat to form an outlet valve, and in which negative pressure applied to the flange portion by the pressure means in use lifts it from the first valve seat, and positive pressure applied to the first tapered portion by the piston in use lifts the second tapered portion from the second valve seat.

Abstract: Methods and apparatus for sealing an aperture that provides fluid communication between a second and first chamber of a dual chamber orifice fitting. A sealing assembly comprises a closure member that is rotatably moveable between an open and closed position relative to the aperture. A secondary seal is disposed within a recessed portion on a sealing face of the closure member. The recessed portion has a perimeter defined by a shoulder A primary seal is disposed within a groove formed between the shoulder and the secondary seal.

Abstract: A solenoid valve includes a poppet formed by a valve body and a supporting plate, the supporting plate having a front surface which the valve body is firmly fixed and a rear surface contacting a tip surface of a plunger. The solenoid valve further includes a cap having: a cylindrical portion which is fitted to an outer circumference of the plunger; an inward projecting portion which projects inwardly from the cylindrical portion so as to abut an outer circumferential portion of the front surface of the supporting plate; and an outward projecting portion which projects outwardly from the cylindrical portion so as to be engaged with a spring member. The poppet is press-inserted into the cap such that the inward projecting portion of the cap and the outer circumferential portion of the front surface of the supporting plate abut each other, and the cap is press-inserted into a tip portion of the plunger such that the poppet is attached on the tip surface of the plunger.