Abstract: A removable valve seat has a peripheral annular flange retained between an annular shoulder in a flow passage and a pair of retainer pins slidably received in bores defined in the valve body. The pins are not threadedly or otherwise engaged in the bores but instead extend beyond the bore termini toward the valve access opening and are prevented from substantial axial displacement by a collar projecting into the access opening from a bonnet. The collar also precludes clapper mounting pins from being dislodged from open hanger recesses disposed in a hanger surface. Removal of the valve seat and other components are readily effected via the access opening by removing the cover, lifting the clapper out from the hanger recess, sliding the retainer pins out from their respective bores and then withdrawing the valve seat out of its flow passage.
Abstract: An intermediate bulk container (I.B.C.) system for handling a flowable material such as a pharmaceutical powder comprises, a discharge station, a transportable station for holding and transporting the powder, and a seal arrangement of the two stations, the seal arrangement being such that seals thereof cooperate one with the other and with the stations, whereby exposure of external surfaces of the system to the powder is obviated during discharge at the discharge station and during transport, so that no powder can escape from the interior to the exterior in use.
Abstract: A flow regulator for high-pressure fluids at elevated temperatures includes a body having a flow passage extending between inlet and outlet openings. First and second orifice members are arranged in the flow passage so at least one of the orifice members can be moved transversely in relation to the flow passage between one operating position where the two orifice openings are aligned for establishing a maximum flow rate of fluids flowing through the flow passage and at least one other operating position in which the two openings are moderately misaligned with one another for establishing a predetermined reduced flow rate of fluids flowing through the flow passage.
April 11, 1990
Date of Patent:
June 4, 1991
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
Abstract: A mounting flange of a thermostat having a seat member including a hard seat and the mounting flange for clamping the thermostat in a counterbore of a thermostat housing has an axial dimension which is less than or equal to the axial dimension of the counterbore. An elastomeric sealing element is interposed between the mounting flange and at least one of the thermostat housing and an engine on which the thermostat housing is mounted.
Abstract: A mixing valve includes a faucet body (1), a control mechanism, a support surface (9a) for a fixed valve plate (18) mounted on this support surface, a seal (16, 17) placed between the fixed plate and the support surface and a movable valve plate (19) connected to the control mechanism and appointed to shift in sliding contact with the fixed plate so as to regulate the flow rate and the mixing proportions. An attachment mechanism (31) connects the fixed plate to the support surface, the seal being compressed between them, by these parts exerting a compressive force. The compression of the seal is therefore made independent of the pressure between the fixed and the movable plates which can then be reduced to render better sliding and working of the valve plates. The attachment mechanism can be fixed or removable, and can work near the center of the fixed plate or along its border or in both positions.
Abstract: A mixing faucet for hot and cold water including a cartridge 40 which contains a fixed valve plate 32 and a movable valve plate 23, both constructed of hard ceramic material, and both constructed to control the proportion of mixing and the flow that comes out of the faucet. In this faucet, the part 25 of the cartridge that has the seat for the fixed valve plate 32 constitutes an element which is separate from the cover 16 of the cartridge. It is mounted in the cover 16 for sealed axial movement and is arranged so that sealed flow can occur from a part of the cavity of the body of the faucet that has a reduced section and in which one of the supply pipes 2 is connected. The seat 25 for the valve plate has some projections 30 which can interact in the passage apertures 32a to laterally affix the plate 32. The cartridge has an annular ring 34 which has some upper teeth 35 that engage with corresponding recesses 33 present peripherally on the work face of the fixed valve plate.
Abstract: A valve for control of fluid flow, the valve including a housing having a valve bore with inlet and outlet ports, a seal cartridge slidingly inserted into the bore and having integrally formed seal rings, in sealing engagement with the bore, and a valve spindle carried in the seal cartridge in sealing engagement with the seal rings with the spindle moveable between valve closed and open positions. A valve having two inlet ports and an outlet port with the seal cartridge being selectively positionable in the housing for controlling flow from a selected one of the inlet ports to the outlet port.
Abstract: A sealing washer for a tap top assembly of the type including an end housing containing a ceramic disc assembly, and for engagement with a valve seat within a tap body with the sealing washer normally engaging said ceramic disc assembly. The sealing washer is comprised of a ring of resilient compressible material surrounded by a sleeve of rigid material positioned whereby, in use, upon excessive compression of said resiliently compressible material a circumferentially extending flange on the sleeve will engage the end of the housing containing the ceramic disc assembly to retransmit the excessive compressive forces to the housing rather than the ceramic disc assembly.
Abstract: A one-way pressure relief valve assembly is provided for venting the lubricant reservoir of a roller-type well drilling bit. The valve assembly is mounted in the cap of the lubricant reservoir, to open outwardly, and is adapted to provide hydrostatic loading of the valve element to its closed position.
Abstract: An eccentric plug valve and method for assembly wherein the valve utilizes a replaceable valve set which is placed against a gasket held in a groove about a rim of a valve opening within the valve body and the valve seat is held in position by means to fasten one side of the insert to the valve body and by a groove in the bottom of the valve cavity and a cam ledge on a valve cover which engage the bottom and top edges of the insert, respectively.
Abstract: There is provided a seat assembly adapted to be received in a spool bore of a valve having a fluid controlling member for controlling the flow of fluid through the valve, with the spool bore having a threaded interior portion. The seat assembly includes a first member having, located towards one end thereof, a grooved ring adapted to receive a tool, and a threaded exterior portion which is adapted to threadedly engage the interior threaded portion of the spool bore. The seat assembly further includes a second member adapted to be received in the first member, with the second member having a seat face adapted to contact the fluid controlling member. The first member threadedly moves the second member between a first position where the seat face contacts the fluid controlling member of the valve to a second position where the seat face is remote from the fluid controlling member of the 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: A high performance butterfly valve utilizing a thin sheet metal annulus to provide sealing between a valve casing and a rotary disc type valving member. The design of the sealing element provides for a self-sealing at all pressures, with augmentation of the sealing action as a result of applied pressure differential. As maximum stresses in the thin metal sealing element are approached, the element becomes supported at an intermediate region, enabling effective performance at both low and high pressure limits.
Abstract: A relief valve for low pressure operation includes a valve body having an enlarged cylindrical bore in alignment with an inlet port and defining a valve chamber. An outlet opens laterally from the valve chamber at a location spaced from the inlet port. An insert member is received in the bore and defines an axially facing raised seat circumferentially about the inlet port at a location closely adjacent the outlet port. A poppet valve with a truncated conical configuration and a maximum outer diameter only slightly less than the inner diameter of the enlarged bore is mounted for engaging the seat and blocking flow through the inlet. A biased stem extends into the valve chamber in axial alignment with the seat insert. The stem has a cylindrical end portion which is received in a cylindrical opening formed axially into the poppet valve on the end thereof opposite the seat insert.
Abstract: A ball check valve assembly for chemical pumps. A fluid conduit terminates at a first surface in a port of circular cross section. Within the conduit, an O ring seat is aligned with the port; an elastomeric O ring is positioned in the seat. Spacer means, radially outward of the O ring seat, extends generally away from the port and has a dimension adjacent the O ring seat greater than the cross sectional diameter of the O ring when unstressed. O ring capture means spaced from the O ring seat limits travel of the O ring away from the port, and provides a central aperture for the valve ball, which has a diameter greater than that of the port. The O ring has an ID less than the diameter of the ball and an OD greater than the diameter of the aperture; the spacer means ID is at least about 1/2% greater than the OD of the O ring.
Abstract: The present invention is an ajustable valve which includes a T-shaped fitting with a first bore, a stem, a bonnet and a valve mechanism with an outlet, a flow nozzle and a flow cone. The outlet is a cylinder with a bore of a first diameter. The outlet has a nozzle ledge and is fixedly coupled to the first bore. The flow nozzle is a cylinder with an inner sidewall and has a first open end and a second closed end. The flow nozzle has a first outer sidewall of the first diameter adjacent to the first open end and a second outer sidewall of a second diameter which is larger than the first diameter adjacent to the second closed end. The flow nozzle is slidably engaged within the outlet. The second outer sidewall has a plurality of orifices extending therethrough and communcating with the inner sidewall of the flow nozzle. The flow cone is a cylinder having an inner sidewall which slidably engages around the second outer sidewall of the flow nozzle.
Abstract: A globe valve comprising: a control rod (70) which is movable in translation along a valve axis (XX'), handle means (90) for controlling movements of said rod in translation, a disk (74) fixed to one end of said rod; a body (12) having an inlet passage (14) and an outlet passage (16) therethrough for passing a liquid, said passages giving access to a cavity (18) which is extended via a cylindrical orifice (22) disposed along said valve axis in order to receive said rod; a cage (36) lodged inside said cavity and within which said disk is capable of being moved by axial displacement of said rod; packing (46) surrounding a portion of said rod and disposed within said cylindrical orifice; a seat (28) which is removable from said body for cooperating with said disk in a closure position, said seat having a first face defining a sealing bearing surface for cooperating with said disk and a first annular thrust bearing orifice, and a second face defining a second annular thrust bearing surface; means for defining a t
Abstract: Valve seat structure for an automotive thermostatic fluid control valve device which is adapted to be positioned within a coolant fluid conduit system of an automotive engine. The valve seat structure has a rigid fluid flow control member which includes a cylindrical wall which forms a fluid flow passage. The rigid fluid flow control member also has an annular base which encompasses the cylindrical wall. An elastomeric sealing member resiliently encompasses the cylindrical wall. The elastomeric sealing member has an abutment portion and a clamping portion. Preferably, the abutment portion and the clamping portion are separated by a shoulder. A rigid clamping member has a clamping portion which is in engagement with the clamping portion of the elastomeric sealing member and is adapted to be clampingly engaged by a part of the coolant fluid conduit system. The rigid clamping member also has a shoulder portion which engages the shoulder of the elastomeric sealing member.
Abstract: A wear monitoring device for use in a choke valve. The device includes a wear liner which fits in the flow annulus of the valve. The liner is sealed at either end from the fluid inlet valve and defines an annular void space in fluid communication with a port to the exterior of the valve. Leakage caused by flow cutting through the liner can be observed as fluid discharge from the port.
Abstract: A replaceable discharge valve assembly for a high pressure reciprocating plunger pump including a generally tubular valve seat member having respective cylindrical portions insertable in cooperating valve chamber portions formed in the pump cylinder block. The seat member receives a reciprocating valve closure member having a plurality of radially projecting guide ribs and a closure member disc portion. The seat member and closure member are retained in the cylinder block valve chamber by a cover member which is threaded and includes a cylindrical portion of a third diameter engageable with the valve seat member for holding the valve seat member in the valve chamber.
Abstract: A clutch master cylinder comprises a master cylinder body provided thereon with a fluid reservoir tank and therein with an inlet port in communication with the reservoir tank and an outlet port for connection to a slave cylinder, a piston axially slidably disposed within the cylinder body and arranged to be moved inward by a push-rod, a valve seat arranged between the inlet and outlet ports within the cylinder body to permit fluid flow passing therethrough, a valve body associated with the piston to cooperate with the valve seat in response to inward movement of the piston, a fixed plug mounted on the cylinder body, and an adjusting plug disposed within the cylinder body to adjust an axial space between the valve seat and the valve body, the adjusting plug having an outer end portion adjustably threaded into the fixed plug and fastened in place by a lock nut threaded thereon and being provided at an intermediate portion thereof with an annular flange engageable with the inner end of the fixed plug to restrict
July 26, 1985
Date of Patent:
January 5, 1988
Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha
Abstract: A heater treater apparatus includes a vessel, a burner for heating a material contained in the vessel, an air intake passage for directing air to the burner, a flame arrester operatively associated with the air intake passage for preventing flames from the burner from extending past the flame arrester, and an air damper for controlling a flow rate of intake air drawn through the flame arrester. The air damper includes a fixed circular first plate having a first plurality of circumferentially spaced plate openings therethrough, and a similarly constructed rotatable circular second plate. The second plate may be rotated relative to the first plate from an open first position to a second position wherein the plate openings of the first plate are at least partially blocked by the second plate.
Abstract: A valve for controlling the flow of particulate material through a conduit which may be referred to as a clam shell valve including and arcuate valve plate. The valve includes a seal block having a recess for receiving the leading edge of the valve plate to assure a seal between the conduit and the valve element. The seal block is shaped to inhibit the entrance of material into the seal block and allow for the easy discharge of that material on opening of the valve element. The valve also includes an upper wiper seal element for cleaning the surface of the valve.
Abstract: A ball valve for controlling upstream to downstream fluid flow, for example, from an apertured tank bottom, has a housing body for bolted-on mounting. The housing has a flow passageway therethrough that angles between its upstream and downstream portions and that is controlled by a valve ball rotatably positioned in and sealed-off within its upstream portion. A resilient, L or ladle-shaped annular gasket is positioned upstream at the joint between the valve housing and the tank bottom and in engagement with the ball adjacent an upstream end portion of its open-end flow passage and, in such a manner as to maintain the flow area of such passage.
Abstract: A valve assembly for insertion into a valve body. The valve assembly includes a valve insert adapted to be positioned axially within the valve body. The valve insert has a longitudinally extending fluid passageway therethrough including an inlet opening at one end in communication with a source of fluid under pressure and an outlet opening at the other end remote from the fluid source and includes a seal disposed between the valve insert and the valve body to only permit flow of the fluid through the fluid passageway. In addition, the valve insert includes a sealing surface extending about the outlet opening. The valve assembly also includes a valve stem adapted to be in axially positioned alignment with the valve insert.
Abstract: A sealing arrangement, which can be inserted into a recess formed in a valve housing, to effectively provide a fluid pressure seal between at least one input chamber and one output chamber, and in which a slide piston is movably-disposed in the recess. The sealing arrangement includes a first gasket and a second gasket, which are disposed in coaxial relationship to one another, and which are concentric to the recess of the valve housing. The two gaskets are connected to one another by means of elastic annular connecting pieces. The connecting pieces of the two gaskets are located between a plurality of apertured retaining elements, which have a portion of the end surfaces of projections in contact with the connecting pieces. A plurality of rivet members pass through the apertured retaining elements and the connection pieces to hold them in the form of a sealing cartridge.
Abstract: A combination valve for relieving excess pressure while also stopping downstream gas flow. A pull-type valve core is mounted within the gas flow passage of a valve body. It includes an actuating plunger operatively connected to a poppet that overlies the valve core and sealingly reciprocates against an upper portion of the valve body. The poppet includes a head portion with a central orifice. The poppet seats against an inner surface of a vented housing which encloses the poppet, valve core and valve body. A spring biases the poppet to its seated position allowing normal gas flow through the central orifice and valve core. Excessive gas pressure will overcome the spring force and allow the excess to vent out the housing. Unseating of the poppet also allows the actuating plunger to close the valve core and stop gas flow to downstream equipment.
Abstract: A ball valve seat is provided which comprises two separate reinforcement members, preferably of metal, embedded in an annular resilient body. The interior of the resilient body defines at one end a part-hemispherical ball valve seat and at its other end, of greater wall thickness, an outlet controlled by the ball valve. One of the reinforcing members has a flared skirt extending into the narrower wall thickness end of the resilient body and a narrower neck located in the wider wall thickness end of the resilient body, where it is received in an annular groove in the second reinforcement member. A portion of the second reinforcement member extends within the wider wall thickness end of the resilient body radially of the first reinforcement member over its skirt portion.
Abstract: A top-entry ball valve 10 comprising a valve body 12 having a chamber 13, flow passages 14, 15, a ball 20 rotatably mounted in the chamber for movement between open and closed positions relative to the passages, and a pair of seat assemblies 50 at opposed sides of the ball which may be loaded into engagement with the ball or disengaged therefrom. Each seat assembly 50 comprises a seat ring 51 having a rear portion 51a, a larger diameter portion 51b which forms a shoulder 51c, and a face seal 59. Three pins 65 in the seat ring 51 in equiangular spaced relation project from the shoulder 51c. A spacer ring 53 sleeved about the rear 51a of the seat ring 51 is provided with recesses 68 adapted to receive the pins 65. The spacer 53 is mounted for movement between a first position where it is engaged by the tips of pins 65 and a second position wherein the pins 65 are in the recesses 68.
Abstract: A bidirectional valve useful at all temperatures from cryogenic to extreme fire temperatures. The sealing means for the bidirectional valve comprises a metallic sealing element having a pair of spaced sealing lobes defined thereon which are coated with a Teflon compound. A third sealing lobe is defined on the metallic sealing element between the pair of sealing lobes and is constructed solely of metal. A pair of coated sealing lobes further function as wipers to prevent sand, dirt or similar foreign particles from becoming crushed between the valve disc and metallic sealing lobe during the final closing of the valve. When the valve is exposed to fire conditions, the Teflon coated sealing lobes melt out leaving the metallic lobe as the fire safe sealing lobe.
Abstract: A recessed seat retainer for a valve is secured in an annular recess on the face of a valve body by a totally internally disposed key system which does not create an external leak path. An annular keyway is formed in the cylindrical sidewall of a seat retainer. A key extends from the cylindrical sidewall of an annular recess formed in an axial face of the valve body. The key is received in the keyway and locks the retainer against axial dislodgement from the valve body.
April 2, 1984
Date of Patent:
March 11, 1986
Bernd Krause, Wayne L. Hoelscher, William F. Scroggin
Abstract: A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat fusible ring assemblies for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and an improved metal-to-metal gate seat.
March 7, 1983
Date of Patent:
February 4, 1986
Alfred P. Regitz, Stephen P. Barrett, Charles E. Jennings, Kendall E. Keene, Bashir M. Koleilat, John N. McIntyre, Ronald L. Riess, Michael R. Williams
Abstract: Valve seat structure for an automotive thermostatic fluid control valve device. The valve seat structure comprises a rigid fluid flow control member which includes a cylindrical wall which forms a fluid flow passage and an annular base which encompasses the cylindrical wall. An elastomeric sealing member or engagement member resiliently encompasses the cylindrical wall and is clamped between two portions of a fluid conduit to position the valve seat structure within the fluid conduit. The elastomeric sealing member is also engageable by a movable valve member to control fluid flow through the fluid flow passage. The cylindrical wall extends beyond the elastomeric sealing member and protects the elastomeric sealing member against the forces of fluid flow.
Abstract: A high pressure ball valve including a valve body with inlet and outlet ports, a ball having a passageway therethrough disposed between the ports, and seats between the ball and the ports guidably supporting the ball. Each seat includes a core of polyethersulphone having a ball engaging face with the same radius as the ball, a metal reinforcing ring, and elastomeric seals bonded to the ball engaging face and the face that seats in the valve body.
Abstract: An improved valve-strainer body or housing is disclosed wherein a single structure is adapted for use as both a valve housing for globe valves, gate valves, check valves and the like, and also utilized as a casing for a strainer. The housing is sized such that the single housing may be utilized in differing sized pipeline systems from approximately 1/4 inch IPS to 1 inch IPS. The invention also discloses superior means of using the valve body casing in connection with not only threaded pipe systems, but also brazed pipe systems and welded pipe systems. Finally, improvements in the valve assembly structure is also disclosed.
Abstract: A pressure-reducing valve is secured to a proportional magnet by resiliently connecting the valve sleeve of the valve receiving the piston to the housing of the proportional magnet, thus avoiding possible deformations of the valve sleeve resulting from mounting. Furthermore, the operational safety of the valve is improved by abutments limiting the stroke of the valve piston and by a control edge which is additionally provided at the valve sleeve.
Abstract: A valve ring arrangement is disclosed in which the corrosion sensitive parts of shut-off valves, control valves and condensate-removal devices are kept out of contact with condensate accumulations. Also disclosed are float and bucket-type condensate-removal devices which are protected against shutdown corrosion by means of automatically draining them during shutdowns.
Abstract: There is disclosed an expanding gate valve having seats which are press-fitted into annular recesses in the valve body on opposite sides of the gate, each seat including a ring having at least one annular rib on its outer end which is of a harder material than that of the inner end of the recess and embedded therein to form a pressure barrier between the seat and recess.
Abstract: A hydraulic choking device for use in controlling fluid flow from an oil or gas well, having an improved valve chamber and valve design to reduce parts' wear and facilitate repairs, wherein the chamber is provided with a cavity within the chamber passageway sidewall to which the fluids are initially directed and wherein a ball nose plug is utilized as the valve gate to seal the valve.
Abstract: An improved faucet device with a swivel spout and an inline valve cartridge, comprising a valve body consisting of two substantially identical molded plastic parts and including a molded plastic sleeve valve member and a pair of combination valve seat and seal members secured inside the valve body to provide a seal with the movable sleeve valve member.
Abstract: A valve seat structure adapted to be positioned within each annular seat pocket (37, 36) which is formed about the flow passage (12, 13) adjacent the valve chamber on both the upstream and downstream sides of the gate element of a gate valve. The valve seat structure comprises a metallic seat ring (40) which fits snugly within the seat pocket (36, 37) but has an axial dimension which exceeds the depth of the pocket. The seat ring is formed with an annular notch (49, 50) in the outer corner of the ring at its rear face (48) for accommodating a resilient O-ring (66) therein. In its front face (47) the seat ring is provided with an annular groove (51) coaxial with the ring axis and provided with serrated side walls (51a, 51b). A plurality of passages (55) are formed in the ring with equiangular spacing and extend from the face groove (51) to the corner notch (49, 50).
Abstract: In a subsurface positive displacement pump used in the petroleum industry for pumping crudes characterized by a high degree of suspended solid particles, a ball check valve comprising a valve ball and a valve seat assembly wherein the valve seat assembly comprises a hollow cylindrical body defining an orifice through which pumped fluid passes, the hollow cylindrical body being provided with a recess on the surface facing the valve ball in the region defining the orifice wherein an insert which forms the actual valve seat for the ball valve is secured in the recess. The insert is formed of a material having a hardness greater than the hardness of the material from which the valve ball is formed which material in turn is characterized by a hardness greater than that of the hollow cylindrical body.
Abstract: A check valve having a removable seat portion with integral flapper (valving means) is disclosed. The seat portion can be removed through a port in the valve body without breaking any connection of the valve body to the associated fluid flow lines. The seat portion can comprise two sections that secure between them sealing means (e.g., an O-ring) for creating a fluid tight seal when the valving member of the check valve is closed against the seat portion. A fluid tight seal is created between the valve seat portion and valve body by tapers on the valve seat that cam against corresponding recesses of the valve body to force the valve seat portion against the valve body.
Abstract: A valve has an externally threaded valve seat sleeve being axially slidably received in a cavity of the valve housing. The sleeve has an end face forming a seat for a valve head and is surrounded by a seal assembly which has a sealing ring being in circumferential engagement with the valve seat sleeve and a part of the housing walls; an abutment mounted on the valve seat sleeve for abutting the sealing ring to prevent an axial displacement thereof in one direction relative to the valve seat sleeve; and an internally threaded sleeve surrounding and threadedly engaging the valve seat sleeve. The internally threaded sleeve has an annular part cooperating with the sealing ring. There is further provided a force transmitting arrangement for applying a torque to the internally threaded sleeve in response to a force applied externally of the valve for rotating the internally threaded sleeve with respect to the valve seat sleeve to axially press the internally threaded sleeve against the sealing ring.
Abstract: A pressure regulator system for providing controlled reduction of fluid pressure from a relatively high pressure fluid source to a relatively low regulated fluid pressure output. The pressure regulator includes a pressure reduction regulator designed for stable flow under transonic conditions, and an improved solenoid valve assembly for switching the reduction regulator to an operational condition.
Abstract: A hydraulic choking device for use in controlling fluid flow from an oil or gas well comprising choke body assembly and a choke actuator assembly having a choke actuator assembly with improved sealing means and choke plug construction, as well as a unique choke actuator drive means.
Abstract: A valve seat (28) having a generally saddle-shaped, eccentric surface (52); a groove (50) of constant depth and width formed in the eccentric surface, having sidewalls (70) perpendicular to the eccentric surface and a base (72) parallel to the eccentric surface; and a flexible O-ring (54) retained by friction within the groove. The groove sidewalls and base have a surface finish in the range of about 32 to 125, which provides sufficient smoothness to retain the O-ring in the required non-planar shape.The valve seat groove (50) can be produced according to the disclosed method, which is preferably implemented in a numerically controlled four-axis horizontal milling tool system. The valve seat part (100) is mounted in a fixture (102) on a rotary table (104) such that the part axis (56) is aligned with the longitudinal axis (Z) of the tool (106).
Abstract: A multiway slide valve having a housing provided with a graduated cylindrical guide bore, a pressure inlet port, and a pair of pressure outlets ports. A preassembled valve seat unit including a plurality of annular spacers which carry sealing rings having respective diameters corresponding to the graduations of the guide bore so that damage to the sealing rings is prevented when inserted into the graduated cylindrical guide bore. A slide spool and jacket inserted into the guide bore. A cover attached to the housing for depressing the jacket which causes deformation of the sealing rings to provide a tight seal between the graduations of the guide bore and the slide spool.
February 9, 1984
Date of Patent:
January 1, 1985
WABCO Steuerungstechnik GmbH
Hans-Friedrich Meyer, Wolfgang Thiele, Hermann Kosmalski, Klaus Meurer, Hans Kruppa, Helmut Gottling, Ernst-August Meyer
Abstract: A fluid valve suitable for use in slush pumps is disclosed. The valve includes an elastomeric seal and a metal wear ring held in place on a valve body by a retaining ring. Thrust of the valve body against a valve seat is absorbed by the wear ring which is held against a shoulder on the valve body. The elastomeric seal is held between the valve body and the wear ring. A second seal is disposed between the inside diameter of the wear ring and the valve body to prevent fluid leakage behind the wear ring. The structure of the valve provides for replacement of the wear ring.