Abstract: A method and apparatus are provided for late-customization of a valve body having an initial valve body configuration having a first end connection and a second end connection. The method includes receiving a selection of (i) a generic valve body, (ii) a first end connection, and (iii) a second end connection. The method further includes adjoining the first and second end connections to the valve body using an iterative welding process. The apparatus is configured to receive a generic valve body having an initial end configuration and to receive a different end configuration. Ends are connected to the valve body subject to an initial bias and a comparison between actual results and predicted results, and first end connection is iteratively welded.

Abstract: In a flow control valve which comprises a valve seat comprising an inner cylindrical part with a contact surface formed in its upper end part and an outer cylindrical part higher than the inner cylindrical member and a valve body that carries out an opening and closing action in a direction perpendicular to the contact surface of the valve seat, an inner cylindrical member and an outer cylindrical member, which are separate members, are airtightly fitted with each other to constitute the inner cylindrical part and the outer cylindrical part. As a result, by processing the contact surface of the inner cylindrical part to be smooth, the flow control valve can control flow rate of gas in a small flow rate range more accurately than before.

Abstract: A solenoid operated valve includes a valve block defining a valve lumen, a poppet slidably disposed within the valve lumen, a solenoid including a core defining a core lumen aligned with the valve lumen, and an armature assembly. The armature assembly includes an armature disc, an armature guide having a hollow cylindrical body defining an armature guide passage, and an armature stud disposed within the armature guide passage. The armature stud is in communication with the poppet so that axial movement of one is translated into axial movement of the other. The valve further includes a coil cover enclosing the solenoid, and a guard disposed to prevent contact between the armature assembly and an adjacent component of the valve. A method of assembling a solenoid operated valve includes placing a shim between the armature disc and the core, and pressurizing and energizing the valve.

Abstract: A solenoid operated valve includes a valve block defining a valve lumen, a poppet slidably disposed within the valve lumen, a solenoid including a core defining a core lumen aligned with the valve lumen, and an armature assembly. The armature assembly includes an armature disc, an armature guide having a hollow cylindrical body defining an armature guide passage, and an armature stud disposed within the armature guide passage. The armature stud is in communication with the poppet so that axial movement of one is translated into axial movement of the other. The valve further includes a coil cover enclosing the solenoid, and a guard disposed to prevent contact between the armature assembly and an adjacent component of the valve. A method of assembling a solenoid operated valve includes placing a shim between the armature disc and the core, and pressurizing and energizing the valve.

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: A diaphragm valve and a seat holder unit for the diaphragm valve which allows easy replacement of a seat is provided. The diaphragm valve includes a retainer configured to hold a seat holder. The seat holder is demountably arranged on a body to hold a seat. The retainer has a substantially cylindrical shape and includes an inward flange portion receiving the outer peripheral edge portion of the seat holder, and is demountably mounted on the diaphragm holding members in a state of holding the seat holder.

Abstract: Valve seat apparatus having positive retention for use with fluid control devices are described herein. An example valve seat apparatus includes a metallic ring and an elastomeric ring coupled to the metallic ring and having a sealing surface to sealingly engage a flow control member of the fluid control device. At least a portion of an outer surface of the elastomeric ring includes an annular lip to sealingly engage an annular recess of a body of the fluid control device.

Abstract: Disclosed is a butterfly valve capable of controlling a flow of a fluid according to a rotation of a disk. The butterfly valve includes a body provided with an inner space having two open ends; a disk unit having a disk rotatably installed at the inner space, and configured to selectively open and close the inner space according to a rotation of the disk; a first seat portion protruding from an outer circumferential surface of the disk; a second seat portion protruding from an inner circumferential surface of the body, and arranged to face the first seat portion; and a sealing unit mounted to the body, and formed to contact the first and second seat portions such that a gap between the outer circumferential surface of the disk and the inner circumferential surface of the body is sealed. Under this configuration, the butterfly valve may have an enhanced reliability under low and high temperatures and a high pressure.

Abstract: A seal used in a valve includes a ring-shaped cartridge. The cartridge has a first portion and a second portion. The first and second portions hold a sealing portion, and the first and second portions have respective first and second curved surfaces adjacent to a sealing surface of the sealing portion. Radii of curvature of the curved surfaces enable an initial point of contact between a flow control member and the cartridge to be on the sealing surface when the flow control member moves to a closed position.

Abstract: A fluid control electromagnetic valve includes a fixed core, a movable valving element, a resin body, a valve seat member, a first sealing member, and a second sealing member. The valve seat member is formed from a material having a smaller linear expansion coefficient than the resin body. The first sealing member is accommodated in the resin body in an elastic compression state to seal a fluid passage and is positioned around the fixed core. The second sealing member is accommodated in the resin body in an elastic compression state to seal the fluid passage. The valve seat member is clamped between the second sealing member and the first sealing member in an axial direction. Elastic restoring force applied by the second sealing member to the valve seat member is larger than elastic restoring force applied by the first sealing member to the valve seat member.

Abstract: A valve is disclosed and can include a valve body having a central bore for passage of fluid there through and a longitudinal axis. The valve can also include a seal installed within the valve body along the central bore. The seal can include a first seal member having an annular ring portion and a hub portion extending from the annular ring portion. The seal can also include a second seal member including an annular ring configured to engage a distal end of the hub portion and create a sealing engagement between the hub portion and the annular ring when a compressive force is applied to the first and the second seal members.

Abstract: A gate valve assembly having metallic valve seats that are axially resilient and maintain a static sealing interface between the valve seat and a body pocket and a sliding dynamic sealing interface between the valve seat and a gate in the valve assembly. The valve seats are annular members having slots formed radially through the valve seats from the inner and outer circumferences. Sleeves may be provided that are coaxial to the valve seats; the sleeves may be on the inner surface of the valve seats, outer surface of the valve seats, or both. Shims may optionally be set in the slots.

Abstract: The invention relates to a magnet valve having a valve body, in which at least one inlet conduit and/or at least one outlet conduit of the magnet valve is provided in at least some regions in the valve body. The inlet conduit and/or outlet conduit are in fluidic communication with a valve seat of the magnet valve. According to the invention in the valve body, a receptacle region is provided, in which an insert part having or embodying the inlet conduit and/or the outlet conduit in at least some regions is disposed. The invention further relates to a driver assistance system having such a magnet valve.

Abstract: The invention relates to a magnet valve having a valve body, in which at least one inlet conduit and/or at least one outlet conduit of the magnet valve is provided in at least some regions in the valve body. The inlet conduit and/or outlet conduit are in fluidic communication with a valve seat of the magnet valve. According to the invention, the valve body is provided with a receptacle region, in which an insert part embodying the valve seat is disposed. The invention also relates to a driver assistance system having such a magnet valve.

Abstract: A powder metal component (34) has an outer diameter that is inserted in a bore of another component (18) during assembly with an interference fit between the two components. Ribs (30) are formed on the outer diameter of the component (34) during compaction and sintering of the component. The ribs (30) have a surface that has been compressed to a greater density than a surface (31) of the outer diameter between the ribs to produce a major diameter and effective roundness defined by high points of the ribs.

Abstract: The closing and sealing device for use in air admittance valves includes a valve housing (10) designed to be connected to the waste water pipe system, an upper cap (14) and a valve closing and sealing device which includes a fixed valve seat (22) and a movable closing member (24). The housing (10) includes at least one passageway (16) in communication with the surrounding atmospheric air, and at least one passageway (18) in connection with the inner space (19) of the sewage system, each of the passageways being in contact with the movable closing member (24).

Abstract: A thermostat assembly including a flow blocking sleeve and a seat between which is defined a flow passage through which a fluid can flow and wherein the sleeve has an end opposing a bearing surface of the seat which extends perpendicular to an axis of the sleeve, and wherein the sleeve and the seat are movable relative to one another by movement of a piston of a thermostatic member to thereby control flow through the flow passage which is radial to the axis and wherein a gasket is crimped within a housing formed between a lateral wall adjacent the end of the sleeve and a ring so as to be secured to be normally engaged with the bearing surface to prevent flow through the flow passage unless the passage is opened by separation of the gasket from the bearing surface by movement of the piston in response to the thermostatic member being activated.

Abstract: The invention relates to a valve cartridge for a solenoid valve, having a capsule, a valve insert that is inserted by a first end into the capsule and on its other end receives a valve body with a main valve seat. A lower valve part is axially braced on the valve insert, and a flat filter for filtering out dirt particles is connected via a retaining element to the lower valve part. According to the invention, the retaining element includes at least one component on the flat filter side and at least one corresponding component on the lower valve part side, which makes at least one partial clamping connection between the flat filter and the lower valve part. The invention further relates to a solenoid valve having such a valve cartridge.

Abstract: A valve manifold has at least one valve receptacle for threadlessly receiving and seating a cartridge valve. A threadless valve nose engages the cartridge valve with the manifold to provide an increased diameter central orifice for improved fluid flow.

Abstract: A valve is disclosed and can include a valve body having a central bore for passage of fluid there through and a longitudinal axis. The valve can also include a seal installed within the valve body along the central bore. The seal can include a first seal member having an annular ring portion and a hub portion extending from the annular ring portion. The seal can also include a second seal member including an annular ring configured to engage a distal end of the hub portion and create a sealing engagement between the hub portion and the annular ring when a compressive force is applied to the first and the second seal members.

Abstract: A cartridge valve and valve manifold assembly having a valve manifold with at least one valve receptacle for threadlessly receiving and seating a cartridge valve. A threadless valve nose engages the cartridge valve with the manifold to provide an increased diameter central orifice for improved fluid flow.

Abstract: A high pressure diaphragm gas valve comprises a removable seat assembly (32), including a mounting ring (34) and a synthetic seat ring (36), which is fitted in a central seat hole of a mounting ring (34). A nozzle (60) penetrates in a sealed way into a central through hole (38) of the synthetic seat ring (36). A first gas port (28) is arranged in a front face (62) of the nozzle (60). A second gas port is formed by a gas collecting ring channel (30) incorporated into the valve body (12), wherein it surrounds a nozzle shoulder surface (64) of the nozzle (60) and is itself surrounded by an outer shoulder surface (102) of the valve body (12). The mounting ring (34) is supported with an inner ring flange (82) on the nozzle shoulder surface (64) and with an outer ring flange (84) on the outer shoulder surface (102), so that peripheral gas passages (86) open into the ring channel (30).

Abstract: A control device includes a valve body, a seat ring, and an actuator. The valve body defines a flow-path for a fluid. The seat ring is disposed within the flow-path. The actuator is coupled to the valve body and includes a control member. The control member is adapted for displacement relative to the seat ring for regulating a flow of the fluid through the flow-path. The control member includes a scaling disk adapted to sealingly engage the seat ring and close the flow-path. The seat ring includes an orifice disposed within the flow-path such that the seat ring prevents at least a portion of the flow of the fluid from substantially perpendicularly impacting the sealing disk.

Abstract: An apparatus and method for a diaphragm valve includes a valve body having a chamber in fluid communication with a first channel and a second channel. A diaphragm is disposed in the chamber, and a tapered seat member is at least partially disposed in the first channel. A sleeve is compressively disposed in the seat member between the seat member and the first channel to maintain a fluid tight seal between the seat member and the first channel. A valve member is movable to controllably urge the diaphragm into and out of engagement with the seat member to control flow of fluid between the first the first and second channel.

Abstract: A valve comprises a valve seat and a movable diaphragm. The valve seat defines a fluid orifice and is formed at least partially of polybenzimidazole. The diaphragm is sized and configured to bear against the fluid orifice to substantially block fluid flow through the orifice. The valve is advantageously used in a hot zone of a semiconductor processing system.

Abstract: A nozzle clamping nut for an injection valve comprises two sections in the longitudinal direction, having different-sized free inner diameters (D1, D2). A shoulder forms a bearing surface (9) in a transition region between the first and second sections, extending in a circular manner perpendicularly to the longitudinal direction. The nozzle clamping nut has a large bearing surface with low stress concentration. The nozzle clamping nut consists of an inner tube (3) and an outer tube (1) which have different-sized inner diameters (D1, D2), which fit inside each other and which are connected to each other in a fixed manner, and the bearing surface (9) is formed by the annular front surface of the inner tube (3).

Abstract: A control valve that reduces noise and controls flow includes a slotted cylindrical skirt and/or a tapered metal ring. The metal ring has a tapered external surface for engaging a matching tapered bore within a valve housing. One embodiment is directed to a control valve including a housing defining a central orifice in fluid in communication with an inlet port and an outlet port, and a movable valve plug assembly having a skirt portion slidably engaged within the central orifice to control fluid flowing through the housing. The skirt portion defines a plurality of openings, which can be slots, to gradually control the flow of fluid through the housing while reducing cavitation. A method of controlling fluid flow in a process includes receiving fluids via an inlet port of a control valve, and controlling the flow of the fluid via a movable skirted valve plug with a plurality of tapered slots.

Abstract: The injection valve has a housing, a nozzle body and a clamping nut connected to the housing that contacts the nozzle body with first contact surface (9) acting on a second contact surface (10), whereby the clamping nut clamps the nozzle body against the housing. The first or second contact surface has a curvature (24) towards the second or first contact surface and the both contact surfaces are in contact in the area of the curvature.

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 fuel injection nozzle is proposed, in which an inner nozzle needle and an outer nozzle needle can be actuated independently of one another. Upon opening of the outer nozzle needle, a stream of fuel is injected into the combustion chamber in the direction of the longitudinal axis of the fuel injection nozzle, while upon opening of the inner nozzle needle, the fuel is injected laterally into the combustion chamber.

Abstract: The injection valve has a housing, a nozzle body and a clamping nut connected to the housing that contacts the nozzle body with first contact surface (9) acting on a second contact surface (10), whereby the clamping nut clamps the nozzle body against the housing. The first or second contact surface has a curvature (24) towards the second or first contact surface and the both contact surfaces are in contact in the area of the curvature.

Abstract: The injection valve has a housing, a nozzle body and a clamping nut connected to the housing that contacts the nozzle body with first contact surface (9) acting on a second contact surface (10), whereby the clamping nut clamps the nozzle body against the housing. The first or second contact surface has a curvature (24) towards the second or first contact surface and the both contact surfaces are in contact in the area of the curvature.

Abstract: A diaphragm valve assembly comprising a body defining a valve chamber and first and second passageways through said, a removable, annular valve seat installed in the valve chamber around of said passageways, seat holding means comprising a seat holder shaped to surround said valve seat, a flexibly resilient diaphragm having a valve closing portion and means for holding the diaphragm in position in the valve chamber. The resilience of the diaphragm urges said valve closing portion away from the valve seat. Selectively operable driving means drive the valve closing portion of the diaphragm into contact with the valve seat for closing the valve. A protruding, cylindrical rim portion around said one passageway, and said seat holder define an annular recess adapted to receive the valve seat such that said valve seat is held between said seat holder and said rim portion.

Abstract: The invention relates to a valve, comprising a valve body for controlling a medium flowing through the valve, a valve housing (3), in which the valve body (1), which has at least one gasket (4) for sealing cooperation with the valve housing (3) or where appropriate with a cage (5) arranged in the valve housing, is axially displaceable by a spindle (6) in the direction towards and from a valve seating (7) in the valve. The gasket (4) extends peripherally around the circumference of the valve body (1) and is expandable in the radial direction to tight abutment against the valve housing (3) or the cage (5) arranged in the latter through axial pressing of at least one press member (9′) acting on the gasket (4) when the valve body (1) is just before and/or in its closing position.

Abstract: A pressure relief valve has a gasketed main body fastened to a vessel wall adjacent to a vent port, the body having a recess surrounding the port which receives a plastic insert removably coupled to the body by a retaining ring fastened to the main body. The insert defines a passage communicating with the port and a valve seat engageable by a seal assembly for closing the valve. The seal assembly includes an annular retainer for a seal O-ring and a plug receivable through the retainer and into a socket in a valve stem, which is spring-biased against the retainer and is guided in a guide assembly removably mounted on the main body. The insert is formed of plastic and the retainer and plug may also be formed of plastic and can be readily field-removable by simply unbolting the housing from the vessel and unfastening the retaining ring. The guide and bias assemblies need not be disassembled.

Abstract: An inline check valve having a piston member and a seat in a valve body having a larger diameter at the end thereof away from the piston. The seat is retained within a groove by a seat retainer which prevents removal of the seat from the groove without deformation of the seat.

Abstract: A balanced fluid pressure regulator of the disclosed embodiment comprises a balancing bellows inside a sensing bellows to minimize the supply pressure effect for improved performance while reducing the size and weight of the regulator in comparison to a conventional regulator. A sensing duct communicates the enclosed space between the bellows with the fluid passage of the regulator downstream from a poppet valve. The cross-sectional area of the fluid passage is reduced in the vicinity of the sensing duct for decreasing the pressure in the enclosed space at high gas flow rates. The valve seat in the regulator is supported so it is free to move during assembly of the regulator to self-align the seat with the poppet valve.

Abstract: A proportional variable bleed solenoid valve that includes magnetic force adjustments to provide magnetic calibration. The control valve includes a housing defining a chamber, where an electromagnetic coil is wound on a bobbin and is coaxially mounted within the housing. A movable armature is coaxially positioned within the bobbin in the chamber and has an armature poppet valve extending form a bottom end of the armature. An armature spring is in contact with an upper end of the armature and a top wall of the bobbin, where the spring positions the armature in an initial position when the coil is not energized and where the armature moves to a second position in conjunction with the bias of the armature spring when the coil is energized. A pole piece is mounted to the housing and is positioned adjacent to the lower end of the armature to define an air gap between the pole piece and the armature.

Abstract: A regulator for adjusting the pressure of a pressurized fluid wherein when a valve seat is fitted with a seat holder in a compressed state wherein excessive deformation of the valve seat due to a compressing reaction force is eliminated by the provision of a recessed groove is formed in the outer periphery of the valve seat. A compressing force by the seat holder is absorbed by compression deformation of the valve seat in the recessed groove portion of the valve seat.

Abstract: A valve seat arrangement that uses a TEFLON valve seat. The seat is held in place and kept from cold flowing in undesired ways by an outlet guide and a retainer. The valve seat arrangement is assembled using interference fits to avoid damage to the TEFLON seat. To overcome technical difficulties associated with the interference fit, a particular method of assembly is used. Specifically, the seat is heated and mounted on the outlet guide. Once the guide/seat assembly returns to ambient temperature, it is immersed in liquid nitrogen to force it to shrink. After removing the guide/seat assembly from the liquid nitrogen, the retainer is mounted thereon and the assembly is allowed to return to ambient temperature, thereby achieving another interference fit. If the retainer were heated to force it to expand, its temperature upon mounting on the seat would damage or destroy the seat, causing leakage through the seat.

Abstract: An appliance water valve assembly includes a valve body and an armature which is movable within the valve body. The armature includes an armature tip. The appliance water valve also has a valve seat which includes a valve seat orifice. The valve seat is positioned in cooperation with the armature tip such that the armature tip contacts the valve seat orifice when the appliance water valve is in a closed position and the armature tip is spaced apart from the valve seat orifice when the valve is an open position. The valve seat further includes a cylindrical ring which is positioned around the valve seat orifice. This cylindrical ring protects the valve seat orifice from damage.

Abstract: A proportional variable bleed solenoid valve that includes magnetic force adjustments to provide magnetic calibration. The control valve includes a housing defining a chamber, where an electromagnetic coil is wound on a bobbin and is coaxially mounted within the housing. A movable armature is coaxially positioned within the bobbin in the chamber and has an armature poppet valve extending form a bottom end of the armature. An armature spring is in contact with an upper end of the armature and a top wall of the bobbin, where the spring positions the armature in an initial position when the coil is not energized and where the armature moves to a second position in conjunction with the bias of the armature spring when the coil is energized. A pole piece is mounted to the housing and is positioned adjacent to the lower end of the armature to define an air gap between the pole piece and the armature.

Abstract: The present disclosure relates generally to a valve assembly including a valve body and a poppet member for controlling flow through the valve body. The valve assembly also includes a valve seat adapted to interface with the poppet member to provide a fluid seal, and seat retaining member adapted to be compressed against the valve seat. Additionally, the valve assembly includes a deformable elastic spacer arranged and configured to axially compress the valve body and the seat retaining member together such that relative movement between such components is inhibited.

Abstract: A cylinder head in an internal combustion engine has a number of valve seat insert bores with a thermally conductive paste applied to an inner surface thereof. A valve seat insert is fitted into each cylinder head bore and the paste fills voids, or air gaps, along the contact surface between the inserts and the bores. The paste is made from a metal powder and a binder material which aggressively bonds to the metal powder, to the inserts and to the bores to form a thermally conductive solid material therebetween.

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

Abstract: The present invention relates to a ball and seat valve having an improved design that increase the reliability and fracture resistance of the seat. The fracture resistance of the seat is increased by providing the seat with a beveled edge. When a force is exerted on the seat along its central axis, the beveled edge creaes a compressive component of force on the inside of the seat. The ball and seat valve is particularly useful when the seat is fabricated from a ceramic material. The ball and seat valve is useful in industries where it is subjected to a highly corrosive environment, such as the oil pumping industry.

Abstract: A pressure relief valve (14, 14A) has a reciprocable valve member (34, 34A) for seating on an annular seat face (66,66A) of a nozzle assembly (38,38A). The nozzle assembly (38,38A) has an inner seat ring (40,40A), a radially outer anchor ring (42,42A), and a flexible connecting member (44,44A) extending in a generally radial direction between the outer peripheral surface (64) of the seat ring (40,40A) and the inner peripheral surface of the anchor ring (42,42A). Upon seating or reseating of the valve member, (34,34A), seal face (36,36A) contacts the seat face (66,66A) of seat ring (40,40A) and flexible connecting member (44,44A) flexes upon relative movement of the seat ring (40,40A) after initial contact of the valve member (34,34A) against the seating ring (40,40A) thereby to act as a shock absorber for absorbing impact forces.

Abstract: The invention relates to a rotary gate valve arrangement with a gate valve housing, a rotatably mounted gate valve rotor arranged therein at right angles to the material flow direction and having a part-cylindrical sliding part which co-operates with a sealing arrangement containing a cassette-like rectangular sealing frame with a sealing element running around it, the sealing frame being received in the receiving channel formed in the housing in such a way that through flow of material is unimpeded and the sealing frame can be simply and quickly inserted and withdrawn without the removal of essential parts of the rotary gate valve.

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

Abstract: An electromagnetically actuated appliance water inlet valve having an elastomeric valve seat with molded in reinforcement stiffener to minimize distortion at assembly and upon exposure to high water line pressures. Lugs on the electromagnetic armature guide engage the periphery of the reinforcement to create a subassembly of armature, return spring, valve seat and guide for ease and economies of assembly. One embodiment of the reinforcement comprises an apertured disc. Other embodiments comprise an annular ring having "C" shaped and "U" shaped transverse sections. Tabs provided in the base of the ferromagnetic pole frame are deformed over a recess in the valve body to provide positive retention of the pole frame to the body.