Abstract: A flow control valve which does not utilize any moving components in the valve is disclosed. In the flow control valve, a valve housing that has a cylindrical-shaped wall is first provided. Inside the valve housing, is then provided a first and a second end plate for sealingly engaging an inner periphery of the valve housing. The first and the second end plate are positioned spaced-apart in a predetermined distance while each of the end plates has at least one aperture therethrough for the passage of a fluid flow to be controlled. Inside a valve cavity formed between the two end plates and the inner periphery of the valve housing is positioned an inflatable bag such that when a fluid is flown into the inflatable bag, the bag inflates to either partially block or completely block the fluid passageway through the valve cavity.

Abstract: A flow control valve which does not utilize any moving components in the valve is disclosed. In the flow control valve, a valve housing that has a cylindrical-shaped wall is first provided. Inside the valve housing, is then provided a first and a second end plate for sealingly engaging an inner periphery of the valve housing. The first and the second end plate are positioned spaced-apart in a predetermined distance while each of the end plates has at least one aperture therethrough for the passage of a fluid flow to be controlled. Inside a valve cavity formed between the two end plates and the inner periphery of the valve housing is positioned an inflatable bag such that when a fluid is flown into the inflatable bag, the bag inflates to either partially block or completely block the fluid passageway through the valve cavity.

Abstract: There is described a pressure regulating valve for a refrigerating plant, having a slider member that can be moved relative to a guide by means of a drive device, with variable throttle resistance being created between the guide and the slider member

Abstract: A mass flow controller (MFC) for controlling the fluid flow in a conduit is configured to include a flow command input for issuing a flow control command, a control unit accepting the flow control command for generating a control signal, a flow-sensing device including a plurality of temperature sensors, a sensor circuit and an amplifier, an actuator being driven by the control unit, and a valve member including a valve being adjusted by the actuator for controlling the fluid flow in the conduit, a distortion controller being distorted in response to the control signal, and an elastic body being distorted in response to an external force resulting from the distortion of the distortion controller for changing the orifice size in the conduit. In addition, the valve can be designed to be fixed instead of being mobile so as to reduce the occurrence of particles resulting from the mutual frictions emerging among the moving parts employed in the valve member.

Abstract: A downhole adjustable choke includes a choke body which is adapted to be lowered into a borehole. The choke body has a bore and an orifice connected to the bore. A sleeve is disposed inside the bore of the choke body. The sleeve has an orifice which is aligned with the orifice in the choke body. An actuator is coupled to move a flow plug inside the sleeve so that the flow area of the orifice in the sleeve is adjustable.

Abstract: A bubbler container assembly particularly adapted for use in vapor generating systems comprising a main outer vessel, an inner bubbler vessel, a carrier gas inlet and a vapor outlet such that the inner bubbler vessel is contained within the main outer vessel and the bubbler container assembly is constructed so as to self-meter an incoming supply of vaporizable liquid during the introduction of a carrier gas and extraction of resulting vapor. Preferably, the system further provides for magnetic induced centering and positioning of the inner buoyant bubbler vessel, fluid temperature sensing and control, connection of a fluid makeup supply, carrier gas inlet supply, and vapor extraction outlet.

Abstract: A stem valve stopper that has a shell (1) intended to be mounted to a faucet (K). An operating stem (8) is mounted for rotation but is axially fixed in the stopper shell (1) and has a lower end that acts as a valve seat surface (12). The stem 8 has an interior section (7) that is threadably engaged with a mobile fitting (6) that is mounted in the shell so that it can be moved axially but cannot be turned or rotated inside the stopper shell. The mobile fitting (6) has an annular lower end surrounding a valve seat (12). A valve sealing member (17) made from elastomeric material is mounted in the lower end of stopper shell (1) and is spring biased downstream toward the valve seat (12). The mobile fitting (6) can be operated to push the sealing member (17) upstream away from valve seat surface (12) and provide flow about the valve seat (12).

Abstract: A flame adjusting device for a gas burning device includes a flame adjusting wheel securely mounted to a disk of a valve on a gas tank and a neck extends from a side of the flame adjusting wheel and a ring is mounted to the neck. A protrusion extends from the ring and is accessible for the users. When shifting the protrusion, the ring and the flame adjusting wheel rotate to adjust the gas released via the valve. When a user wants to change the volume of gas released via the valve, he/she holds the protrusion and rotates the flame adjusting wheel so that the disk of the valve is rotated while the ring is remained still.

Abstract: A service port connector for connecting to a service port of a pressurized system is described. The connector includes a valve opening member for opening a valve within the port. The position of the valve opening member within the connector is adjustable. The adjustable valve opening member allows the valve in the service port to be opened fully by the connector over a range of valve positions within the port. The connector can attach to a service device for servicing the pressurized system. The system can be an air conditioning or refrigeration system.

Abstract: An improved modulating expansion valve includes a housing having a high pressure side, a low pressure side and a piston reciprocally mounted in a portion positioned centrally therebetween. A manifold is sealingly mounted above the piston, and a high pressure control passageway extends from the valve inlets, through the manifold, to a chamber on top of the piston. A low pressure passageway extends from the chamber through the manifold to the valve outlet. A pair of electrically operated solenoids open and close the high and low pressure passageways to operate the valve. Substantially infinite control of the solenoids provide for modulating control of the valve in a semi-hermetically sealed expansion valve.

Abstract: A solenoid valve for an anti-lock brake system is disclosed which has two orifices and oil passages formed a magnetic core so that at the slip mode the amount of hydraulic oil transmitted to a wheel sylinder can be varied, its structure is simplified and its manufacture is facilitated. The solenoid valve includes a magnetic core 130 inserted into a bore 101 in a modulator 100 which has an inlet and outlet passages 300 and 310 and an invariable orifice 320, a plunger 140 installed in the magnetic core 130, and a piston 200A installed in the inlet passage 300. The piston 200A has an eccentric hole 202 formed vertically passing through its interior and a groove 203 on its top surface, thus forming a variable orifice 340 along with a lower end of the invariable orifice 320. The magnetic core 130 has a through hole 330 formed slanting upward. A lip seal 400 is formed between the outer periphery of the magnetic core 130 and the bore 101.

Abstract: A volume adjusting faucet includes a body with an outlet, a switch and an adjust valve, and a rod portion. The rod portion has a through hole at a proper location and vertical to a passageway for containing the adjust valve, which has a valve body and a valve cap both provided with an annular groove for a O-shaped ring to fit therein. The valve body has a small neck portion with a vertical hole. Then the valve body is inserted in the through hole from one side, and the valve cap is inserted in the through hole from the other side to screw with the valve body together. If the adjust valve is rotated by the switch, the angle between the through hole and the passageway is altered to alter the volume of water flowing out. Further, the small neck portion enables water to flow with the minimum volume even if the through hole and the passageway form 90 degrees, achieving the function of water saving.

Abstract: A sleeve valve comprises a sleeve and a gate. The sleeve includes an intake, a discharge nozzle section, and a clean-out section. The discharge nozzle section includes a plurality of nozzles. The sleeve is adapted for fluid flow from the intake through a fluid passage and out the nozzles. The clean-out section includes at least one access port. The gate is adapted for sliding within the sleeve in sliding sealing engagement with the interior surface of the sleeve between closed, throttling, open, and clean positions. The gate and sleeve are configured so that the gate, when in the closed position, prevents fluid within the fluid passage from flowing out the nozzles and the access port. The gate and sleeve, when in the throttling position, permits fluid within the fluid passage to flow out some of the nozzles but prevents fluid within the fluid passage from flowing out the access port of the clean-out section and others of the nozzles.

Abstract: In a vacuum pressure control system constituted of a vacuum vessel, a vacuum pump sucking gas in the vacuum vessel, a vacuum proportional opening and closing valve disposed on a pipe connecting the vacuum vessel and the vacuum pump, the vacuum proportional opening and closing valve changing its opening to change the vacuum pressure in the vacuum vessel, a pressure sensor to measure the vacuum pressure in the vacuum vessel and a vacuum pressure control device to control the opening of the vacuum proportional opening and closing valve based on the output of the pressure sensor, the vacuum proportional opening and closing valve is provided with a valve seat, a valve member with a tapered surface in its outer periphery and a pilot valve, the valve member being movable along a center line of the valve seat to change a clearance area between the valve seat and the tapered surface, and the vacuum pressure control device controls a servo valve to change the pressure of air to be supplied to the pilot valve based on t

Abstract: An apparatus for adjusting an operating speed of a pneumatic valve 1 by means of a solenoid valve 2 including a disk-shaped orifice block 5 having a plurality of orifices 22-25 of different aperture sizes formed therein, and the orifice block is arranged rotatably between a sub-base 3 of the solenoid valve 2 and a main block 6. By rotating the orifice block 5, any one of said plurality of orifices formed in the orifice block 5 can be selectively inserted into the fluid passage between the pneumatic valve 1 and the solenoid valve 2. The operating speed of the pneumatic valve 1 can be easily adjusted in a digital manner, and the water hammer phenomenon can be effectively prevented.

Abstract: A method of influencing a flow of waste water in the waste water system of a housing development, in particular for reducing peak flows in these waste water systems. Reservoirs in the waste water system are activated in a surface-covering manner in order to delay discharge.

Abstract: A cap assembly for providing continuous drip to a faucet exposed to freezing temperatures such as a faucet located outside a house. The cap assembly includes a cap member adapted to be mounted over the end of a faucet, which cap member includes a cylindrical wall portion and a closed end portion having an opening therein. The cap assembly includes an internal annular ridge which is adapted to receive a flow disc within the ridge, which flow disc includes an opening which is non-aligned with the opening in the closed end portion of the cap in order to create a dripping action. A rubber washer is positioned in sealing engagement with the internal annular ridge and the flow disc. A filter member is located within the rubber washer such that, upon mounting of the cap assembly over the end portion of a faucet, a continuous dripping flow through the cap assembly may be provided in order to prevent water within the faucet or within piping leading to the faucet from freezing.

Abstract: An apparatus for helping to protect a vehicle occupant in the event of a collision comprises an inflatable vehicle occupant protection device 12. An inflator 14 having a source of inflation fluid 48 for inflating the protection device 12 includes a passage 30 through which the inflation fluid 48 flows from the inflator 14 into the protection device 12. A member 60 for regulating the flow of the inflation fluid 48 through the passage 30 defines a first orifice 68, through which inflation fluid 48 flows, of a first fluid flow area when no electric current is applied to the member 60 and defines a second orifice 68a, through which inflation fluid 48 flows, of second fluid flow area larger than the first fluid flow area when electric current is applied to the member 60.

Abstract: A cartridge for a mixing valve of the so-called sequential type, which includes:--an envelope intended for being inserted in a valve body;--a bottom member which closes at bottom the envelope, has outer connections intended to sealingly cooperate with passageways for inlet of hot and cold water, present in the valve body, and has an inner seat for sealingly receiving a fixed hard material control plate;--and a rotationally movable member arranged for internally housing a movable hard material control plate and having a portion intended for protruding out of the valve body with a device for receiving a maneuver member; wherein the fixed control plate has a pair of passageways situated near its periphery for the inlet of cold and hot water, and a substantially central passageway for the outlet of mixed water, the movable control plate has an inlet passageway situated near its periphery and a central outlet passageway, and the movable plate is sealingly installed in said movable member in such a way as to delimi

Abstract: A fuel injection valve in particular an injection valve for fuel injection systems of internal combustion engines has a valve closing body connected to a valve needle and a valve seat body. A valve closing surface that cooperates with a valve seat surface configured on valve seat body to form valve seat on valve closing body. Furthermore, the fuel injection valve has at least one fuel channel provided in the area of the valve seat body upstream from the valve seat for supplying fuel to the fuel seat. A throttle point, whose opening cross section can be varied from outside the fuel injection valve, is arranged in each fuel channel.

Abstract: A smooth vent valve in which an on-off valve and a flow control valve are provided in series and arranged to be capable of being operated by respective actuating mechanisms, thereby accurately performing the on-off operation of the on-off valve and the flow rate control of the flow control valve. The smooth vent valve (11) has an on-off valve (8) and a flow control valve (9), which are coaxially provided between an inlet port (18) and outlet port (19) of a valve body (13 to 15). The on-off valve (8) and the flow control valve (9) are placed in series. An actuating mechanism for the on-off valve (8) and an actuating mechanism for the flow control valve (9) are formed separately from each other. When the on-off valve is in an open position, the flow control valve can be switched between a throttling position and an open position while continuously changing the flow rate.

Abstract: A cyclic flow valve (20) for cyclically controlling the flow of combustants into a combustion furnace. The cyclic flow valve includes a valve housing (26) having a chamber (30), an inlet (36), and an outlet (46). The cyclic flow valve also includes an aperture plate (52) rigidly fixed within the chamber of the valve housing. The aperture plate has first and second apertures (68a and 68b) extending through the plate. A rotor member (54) is rotatably secured within the chamber. The rotor member is held in spaced disposition from the aperture plate. The space defines a low flow gap (92) of predetermined width between the rotor member (54) and the aperture plate (52).

Abstract: In a vacuum pressure control system constituted of a vacuum vessel, a vacuum pump sucking gas in the vacuum vessel, a vacuum proportional opening and closing valve disposed on a pipe connecting the vacuum vessel and the vacuum pump, the vacuum proportional opening and closing valve changing its opening to change the vacuum pressure in the vacuum vessel, a pressure sensor to measure the vacuum pressure in the vacuum vessel and a vacuum pressure control device to control the opening of the vacuum proportional opening and closing valve based on the output of the pressure sensor, the vacuum proportional opening and closing valve is provided with a valve seat, a valve member with a tapered surface in its outer periphery and a pilot valve, the valve member being movable along a center line of the valve seat to change a clearance area between the valve seat and the tapered surface, and the vacuum pressure control device controls a servo valve to change the pressure of air to be supplied to the pilot valve based on t

Abstract: An internal diffuser on a diffuser stem is disposed in a bore of a rotary control valve for attenuating vibration in gas service or cavitation in liquid service. The valve has a valve body and a valve element, and the valve element is rotatable with respect to the internal diffuser. The internal diffuser can be rotatable or non-rotatable with respect to the valve body. The valve element has a valve stem, and the internal diffuser can be arranged coaxially with the valve stem, but this is not a necessary requirement. In one embodiment the internal diffuser is positioned in the bore of the valve element, and the diffuser stem is parallel with the valve stem and spaced laterally apart from it. In another embodiment the internal diffuser is located in the bore of the valve outside of the valve element in either an inlet or an outlet passage of the valve body. The diffuser stem has an axis which can be nonparallel with respect to the axis of the valve stem.

Abstract: A valve apparatus comprises a valve body, a piston disposed within the valve body, and a rolling diaphragm poppet that is attached the piston to regulates fluid flow through the valve via interaction with a valve seat within the valve body. The valve body has a chamber extending therethrough that includes a valve seat at one chamber end that defines a fluid inlet passage into chamber. The piston disposed within the chamber and is adapted for axial displacement therein by an actuating means. The rolling diaphragm poppet is attached to an end of the piston and is of a one-piece construction. The poppet includes a head that has a circular radial cross section, and that has a frontside surface that is adapted to interface with the valve seat in the chamber to control fluid flow therethrough. The head also has a backside surface that is adapted to accommodate attachment with an end of the piston.

Abstract: A control valve having a sliding valve member body movable into valve closing position against a valve seat in an outflow conduit. The body has a conical outer end for controlling the flow through the valve and a plurality of fins extending radially from the outer end into engagement with the outflow conduit to guide the body.

Abstract: An adjustable height fill valve assembly for controlling water level in a storage tank, comprises a lower riser assembly comprising concentrically disposed inlet riser and an outer riser housing, each having an upper end and a lower end, the inlet riser and the riser housing connected together at the lower ends, the inlet riser being adapted for mounting in a hole in a flush tank, an upper riser assembly comprising concentrically disposed inner supply tube and an outer tubular valve housing, each having an upper end and a lower end, a main valve seat at the upper end of the inner supply tube, the upper riser assembly telescopically mounted on the lower riser assembly, a latch between the riser housing and the tubular valve housing for latching the upper and the lower riser assemblies in selected extended and retracted positions, the latch disengageable upon rotation of the upper riser assembly in either direction from a central position, a valve housing cap having a bayonet lock connection for quick connect d

Abstract: A valve with a Laval nozzle, a valve needle movable axially in the Laval nozzle, and an inlet chamber which receives the valve needle foot, in which chamber a radially extended inlet opening terminates. The inlet chamber is separated axially from the inlet plane of the Laval nozzle by a flow channel located therebetween. The inlet chamber is delimited by the valve needle on one side and by one of the valve needle housing sections surrounding the valve needle on the other side. This valve can be used in particular as a metering valve for metering a process gas for a reaction process in a motor vehicle operated by a fuel cell.

Abstract: A pilot operated safety relief valve (14) has a main piston valve member (60) mounted for reciprocal movement between open and closed positions. The lower end of piston valve member (60) has a seat retainer (87) to retain an annular seat (89) therein. An interchangeable plug (93) is removably connected by bolt (97) to seat retainer (87) and piston valve member (60). Plug (93) extends within the inlet (50) to form a restriction within the inlet (50) defining an angular orifice (99) in the open position of the piston value member (60) for controlling discharge fluid flow. Different size plugs (93, 93A, 93B) as shown in FIG. 4 may be utilized in order to provide the desired orifice size for annular orifice 99 as illustrated in FIG. 4.

Abstract: A flush valve includes a body with an inlet, an outlet, a valve seat at the outlet, and a piston movable in the body toward and away from the valve seat to control flow through the outlet. The piston has a chamber and there is a refill orifice in the piston connecting the chamber with the body inlet. Pressure in the chamber maintains the piston closed upon the valve seat. A relief valve in the piston vents the chamber to the outlet to permit the piston to move away from the valve seat to open flow from the inlet to the body outlet. The piston has a guide portion which extends downstream of the valve seat when the piston is in the closed position. The guide portion of the piston has a plurality of outwardly extending axial ribs, the outer surface of which is radially in alignment with the path of flow through said valve seat.

Abstract: A tri-stable, solenoid-operated valve defines an internal chamber communicating with an outlet passageway and an inlet passageway, with a valve seat surrounding the outlet passageway. A first piston reciprocates toward and away from the valve seat and supports a closure adapted to close the valve when the first piston is in a first position, and to be spaced away from the valve when the first piston is in a second position. A second piston is mounted to the first piston and can reciprocate toward and away from the valve seat. The second piston has a portion which projects into the outlet causing partial occlusion when the first piston is in its second position and the second piston is in its first position. The portion of the second position causing the outlet to be occluded is substantially withdrawn when both pistons are at their respective second positions.

Abstract: A direct contact steam injection heater allows shear to be adjusted without taking the process off-line to relieve pressure within the heater. A stud is mounted to an adjustable combining tube within the heater. The stud extends through an opening in the heater body into a sealed housing. An adjusting mechanism exerts force on the combining tube stud within the sealed housing to move the combining tube longitudinally within the body to adjust the shear within the heater. The position of the combining tube is indicated by an analog revolution counter. The adjusting mechanism can be driven manually or by a motor. The motorized embodiment of the invention can be used with feedback control to automatically optimize shear.

Abstract: A gas control valve includes a bore and a room formed in the upper portion and lower portion and includes a valve seat formed between the hole and the room, and includes an inlet and an outlet pathway. A plate is slidably engaged in the room and has two posts slidably engaged in the body. A ball member is supported on the plate for engaging with the valve seat so as to block the passagewayu from the room to the bore. A rod is slidably engaged in the bore for disengaging the ball member from the valve seat. The ball member is forced to engage with the valve seat in order to block the gas passageway so as to prevent the gas from flowing through the outlet pathway when the gas has a pressure large enough to force the ball member to engage with the valve seat. The plate may be adjusted relative to the valve seat in order to adjust the distance between the ball member and the valve seat.

Abstract: A variable orifice ball valve includes an external housing with a longitual fluid bore formed therethrough. A ball member is rotatably positioned within the external housing. The ball member can include first and second ball portions, with the longitudinal fluid bore formed through the ball member and a pressure port formed through the ball member. An elastically expansible sleeve member is secured to an inner wall of the ball member, the elastically expansible sleeve member including opposing end portions and a middle section. The end portions are secured to an inner wall of the ball member, the elastically expansible sleeve member defining an expansible chamber between the inner wall of the ball member and the elastically expansible sleeve member, such that a variable sized fluid port is formed on the inner surface of the elastically expansible sleeve member for restricting fluid flow by expanding the sleeve member upon introduction of a pressurized fluid through the fluid bore and pressure port.

Abstract: A ball valve assembly and method in which a ball valve is rotatable in a conduit section to and from an open position in which at least a portion of a bore in the valve registers with the inlet and the outlet of the conduit section to permit the flow of the fluid through the conduit section. An insert is disposed in the bore and has a plurality of through passages formed therein for reducing the noise caused by the fluid flow though the ball valve and is operable over a relatively wide range of pressure drops and flow rates.

Abstract: Gas control and dispensing assembly comprising a lower unit (1) which is mounted on a gas tank (4) and houses a regulator (10, 9) and an upper unit (5) which is mounted on the lower unit (1) via a threaded ring (24) and houses an indexed flowmeter valve (14, 43) upstream of a low pressure gas outlet (19). The invention is suitable for transportable gas tanks and vehicle-body integrated gas tanks.

Abstract: A variable-split blowdown coal feed system supplies two streams of air entrained pulverized coal in a uniform, well-metered steady state manner. Splitter dampers control a split of a coal and air mixture into two streams which are fed to respective cyclones operated in the blowdown mode. The cyclone's exhausts are connected in common to a manifold through which a blowdown damper controls the air-to-coal ratio in the air entrained pulverized coal streams that are expressed from each cyclone's discharge.

Abstract: In a hydraulic device including at least two actuators both adapted to be operated by a single pump, one of the actuators having priority over the other actuator, a control valve for the one actuator including a load hold check valve adapted to assign a variable priority function to the one actuator over the other actuator, the load hold check valve including a valve body provided with a pair of ports respectively communicating with the actuators and a parallel fluid passage communicating with the pump, the parallel fluid passage also communicating with a selected actuator port in an opened state thereof, a poppet disposed in the valve body and adapted to fully open the parallel fluid passage at a full stroke thereof and partially opening the parallel fluid passage at a limited stroke thereof, and a pressure setting spring adapted to always urge the poppet toward the initial position for closing the parallel fluid passage.

Abstract: A valve is provided for accurately controlling the flow of cryogenic fluids such as liquid nitrogen. The valve comprises a combination of disc and needle valves affixed to a valve stem in such a manner that the disc and needle are free to rotate about the stem, but are constrained in lateral and vertical movements. This arrangement provides accurate and precise fluid flow control and positive fluid isolation.

Abstract: A valve with presetting facility has a valve housing with a rotatable sleeve. To form a present throttle, a control opening at the base of the sleeve co-operates with a control opening at a base face of the valve housing. The control opening in the base face is formed by an eccentric bore. The control opening in the end face of the base is formed by a channel which extends over a circular arc of less than 360.degree. , is connected at one end by way of an eccentric bore to the inner space of the sleeve and has a cross section that reduces towards the other end. That allows presetting to be very precise and manufacture to be inexpensive.

Abstract: The present invention provides an air valve (10) for inflating and deflating an inflatable. The air valve (10) includes a housing floor (16) with air ports (36, 38), and a slide bar (12) with an air passageway (54) formed therein. The slide bar (12) is supported on the floor (16) by seal rings (92) surrounding the ports (36, 38) and is biased into a center position by a spring (94) positioned in a spring well (28) in the slide bar (12) or the floor (16). Pins (50, 52) project into the spring well (28) and engage opposite ends of the spring (94). A stem extends from a tilt button (66) into a socket (48) on the slide bar (12). When the button (66) is tilted, it moves the slide bar (12), compressing the spring (94) and aligning the ports (36, 38) and the passageway (54) to allow air to pass through the valve (10). The slide bar (12) is prevented from tilting by a stabilizer frame (82) or housing shoulders (220).

Abstract: A valve which is formed by a face of a valve body and the outlet area of an opening in a counterpart is disclosed. An extension dipping into the opening to ensure smooth evolution of the beginning of opening operation is known. The opening behavior achieved in this manner is not sufficient for all applications. In order to further smooth the evolution of the beginning of the opening operation, a clearance fit is provided between the extension and the opening which is interrupted by a countersink in the extension or in the opening. The countersink is formed and placed in such a manner that it comprises the counterpart of the clearance fit and at least one inclined control edge and, thereby, an adjustable choke which can be controlled in series with the valve. The countersink can take the form of a groove. Valve arrangements for compressed-air systems in motor vehicles represent a special area of application for the invention.

Abstract: A flush mechanism is provided for a urinal, wherein the working components are provided within a two-part, sealed housing. A button is provided on the cap portion of the housing to flush the urinal. Depression of the flush button signals a battery-powered solenoid to open for a preset amount of time, allowing water into the mechanism from a supply line. The flow of water in each flush is further regulated by an adjustable flow-control valve. All working components can be accessed for replacement or maintenance with only a minimum of disassembly of the flush mechanism.

Abstract: A flow control valve having a bypass valve section that opens when a main valve section has approached a closed state has a bypass start point that can be easily varied and adjusted, even after installation of the flow control valve. Further, cavitation is not generated in the valve. The flow control valve comprises a cylindrical body having a bypass valve seat and a plurality of protrusions on an inner peripheral surface to form bypass flow passages therebetween. A bypass opening and closing body has a bypass valve element formed at its front end portion and a plurality of slit holes formed on its outer peripheral surface so as to open and close the bypass flow passages between the respective protrusions, and is disposed in an axially movable manner. A piston is disposed in an axially movable manner in the bypass opening and closing body and has an enlarged outer diameter section formed on its rear portion and a communication hole penetrating therethrough in the axial direction.

Abstract: A fluid flow control valve actuated by a solenoid to selectively position the valve by balancing electromagnetic forces, spring forces and fluid forces within the valve. The valve includes a plurality of flow control orifices in series that provide flexible dual slope flow performance characteristics, precise flow control and high flow capability directed to use as a vehicle's evaporative emission control system purge valve.

Abstract: For a shaft seal for a pump, a barrier fluid flow and pressure control method, system, and apparatus providing a manifold having oppositely axially arranged flow and pressure control valves, the control valves having open-ended valve cylinders reciprocally adjustable within flow channels of the manifold, the valve cylinders having elongate flow orifices selectively positionable within the flow channel with said orifice in selective registry with a respective outlet. The extent of registry of the elongate orifice with the respective outlet controls the rate of flow through the valve. The pressure control valve sets the barrier fluid pressure while the flow control valve sets a minimum flow required for the barrier fluid operation.

Abstract: In a preferred embodiment, a fluid flow valve, including: an elongate body having an axially extending cavity defined therethrough and having fluid inlet and outlet ports; a hollow seat assembly disposed in the body for the passage therethrough of a fluid; a shaped first aperture defined through a wall portion of the seat assembly; and a plug selectively axially moveable in the hollow seat assembly and along the shaped first aperture such that the fluid flows into the hollow seat assembly, upwards past the plug into the first aperture, through the first aperture, downwards past the plug, and out of the hollow seat assembly, the position of the plug along the aperture determining rate of flow of the fluid through the valve.

Abstract: Control valve for high pressure drop, which includes:(1) Seat ring with an extension on the lower side formed by a drilled cylinder(2) Cylinder which guides the plug and is also drilled in its lower side(3) Plug, with diameter decreasing in steps from the upper to the lower side, these plug diameters combined with the inside diameters of cylinder and seat ring, create inner chambers or intermediate stages, which divide the total pressure drop of the fluid across the valve in several smaller pressure drops, in a preferred design as shown in FIG. 1, there are 3 inner stages.(4) A lower ring chamber in between diameter of the plug (3) and the inner diameter of the seat ring (1).(5) A cylinder chamber, inside the plug (3) which is hollow, and(6) An upper ring chamber formed by the intermediate plug (3) diameter and the inner diameter of the cylinder (2).Chamber (4) and (6) are also balancing chambers in that the pressure around the plug is the same all around.

Abstract: Fluid pressure changes are imposed on selected interior surfaces of a plug passageway of a plug valve to create torque. In one embodiment perturbations are provided in selected flow surfaces of the valve plug to create turbulent boundary layer flow along such surfaces which generates a beneficial stabilizing torque tending to reduce or eliminate holding forces conventionally provided by mechanical parts such as detent mechanisms. In another embodiment, pilot holds between interior and exterior plug surfaces are used to alter the fluid pressure at diagonally opposite locations relative to the plug rotation axis to produce the stabilizing torque.

Abstract: A poppet valve has a flow restrictor downstream of the poppet which is externally adjustable by rotation of the poppet valve stem. The restrictor is in the form of a throttle ring threadedly mounted on a valve guide and the throttle ring has a diameter less than that of the valve port sealed by the poppet so that the assembly of the throttle ring is removable through the valve port while inadvertent removable is prevented by projecting cap screws on the throttle ring extending to a diameter greater than that of the valve port. The valve poppet is also provided with a contour area adjacent the seat which provide a restriction after initial opening movement of the poppet to minimize erosive wear on the poppet sealing surfaces when the pressure drop occurs adjacent these surfaces.