Abstract: A heat exchanger includes a first regenerator core and a second regenerator core and a four-way valve coupled to a cold section of the first regenerator core and to a cold section of the second regenerator core. The four-way valve directs input air to the first regenerator core or to the second regenerator core. A high-temperature passive check valve is coupled to a hot section of the first regenerator core and to a hot section of the second regenerator core. The high-temperature passive check valve comprises an inlet header coupled to the hot section of the first regenerator core or the second regenerator core, a valve poppet coupled to a valve stem and a valve seat located on a surface parallel to a surface of the valve poppet. Air entering the inlet header moves the valve poppet away from the valve seat, creating an opening through which air passes.

Abstract: A fluid delivery system having a rotating reservoir insert and a cartridge body. The rotating reservoir insert having a plurality of reservoirs in communication with ports on the external surface of the insert. The ports are positioned such that upon rotation the port is in-line with a fluid extracting device, such as a syringe, capable of extracting fluid from the reservoir.

Abstract: A device is described for fitting and removing a closing means (27, 29) on an end portion (13) of a tubular element (3), comprising: a container (1) defining an internal chamber (18); a rotating platform (19) inside said chamber at the bottom (16) thereof; a receiving housing (26) that is able to receive and hold a first closing means (27) from said end portion of tubular element; and a releasing housing (28) that is able to contain and release a second closing means (29), in said end portion of tubular element; said receiving and releasing housings provided with an opening for passage of the closing means, being fixed on said rotating platform with said opening turned towards said perimeter walls (17) of the container. The device can be used as a connector for peritoneal dialysis and minimizes or eliminates the risks of contamination, also of pathogens, and the risks of peritonitis.

Abstract: A rotary valve (1) includes a valve body (2) formed with a chamber communication passage (24) for flowing a main fluid and a vent communication passage (25) for discharging the main fluid and a cylindrical valve member (3) rotatably held in the valve body (2) and formed with a main passage (31) for flowing the main fluid. The cylindrical valve member (3) is rotated to switch the connection of the main passage (31) between the chamber communication passage (24) and the vent communication passage (25). The rotary switching valve (1) further includes a purge gas passage for passing purge gas in a clearance (11) between the valve body (2) and the cylindrical valve member (3), the purge gas being supplied to the clearance (11) to prevent the main fluid from leaking out of the main passage (31).

Abstract: A valve system for collection and removal of condensation from a gas-pressurized fluid system. In one embodiment a single valve is used, having inlet, outlet and condensate collection ports and a valve body capable of movement between a position which connects the inlet port to the condensate collection port and a position which connects the condensate collection port to the outlet port. The valve is formed such that the inlet port is not connected to the outlet port while the valve is moved between the two positions, so that the pressurized system is not depressurized. A second embodiment uses two coupled valves replacing the single valve.

Abstract: The Invention relates to an upwardly and downwardly discharged faucet for comfortable use, comprising a main handle and a main valve body. The main valve body is provided with a diverting valve with dual ports. The diverting valve comprises a valve seat mounted on the main valve body. On the bottom side wall of the valve seat are disposed a left inlet and right inlet which are in communication with a main conduit, respectively. Within a chamber is disposed a diverting valve core, in which an upper water conduit and a lower water conduit are disposed. The upper water conduit is in adjustable communication with the right inlet; and the lower water conduit is in adjustable communication with the left inlet. The outlet of the lower water conduit is in communication with the bottom of the chamber. On the upper end of the diverting valve core is provided a rotary valve stem.

Abstract: A selector valve assembly for use in conjunction with an eductor dispensing system which reduces the incidence of product carry-over when the valve is moved from one position to another. The selector valve assembly also reduces the incidence of improper dispensing. In a preferred manner, the selector valve assembly has a single valve member and accommodates four product inlet lines for selectively passing chemical concentrate to two eductors. The selector valve assembly is composed of a minimum of ports, thereby reducing maintenance and cost.

Abstract: A cooling circuit comprises a cylinder block and a cylinder head block, these blocks each including cooling elements the form of integrated portions of circuit. The cooling circuit also includes at least a first, a second and a third separate external loops for external recirculation or reinjection mounted in parallel and looped on the integrated cooling elements. A circulating pump is connected fluidically to the integrated cooling element and to the three recirculation loops causing the fluid to circulate in the integrated cooling element and in the three recirculation loops. The at least three recirculation loops offer at least one common fluid node and are at least partially overlapping. A single actuator controls the flow of liquid circulating in the at least three recirculation loops.

Abstract: An exemplary embodiment of a diverter valve system includes a valve body defining an internal chamber having at least first, second and third ports, and a first valve seat associated with the first port and a second valve seat associated with the second port. A valve shaft structure includes an internal shaft portion positioned within the internal chamber, the valve shaft structure configured for rotation about a valve axis through a range of motion.

Abstract: A separated-control valve device includes a valve seat having a space defined therein. An inner lower periphery of the space has two inlets and two outlets are defined therein and communicated with the space. A control assembly is partially and pivotably received in the space in the valve seat. The control assembly has a first valve and a second valve for respectively adjusting water flowing from the inlet to the outlet. A limiter is mounted on the valve seat for confining the control assembly received in the space.

Abstract: A diverter valve (10) for selectively controlling the flow of fluid from a fluid source to one of several fluid outlets (132, 136) includes a fixed ceramic disk (14) fixed to a housing (12) and a rotating ceramic disk (16) retained in the housing against the fixed disk by a retainer (24). An accessory mount (20) is adhered to the rotating ceramic disk to facilitate connection to accessories and to direct fluid from the valve. Flow passages (88, 90, 104, 106, 108, 110, 112) in the disks cooperate with flow passages (54, 64, 66, 68) in the housing and flow passages (116, 118, 122) in the accessory mount to balance the pressure of fluid flow within the valve against the disks to minimize leaks and prolong durability.

Abstract: A ball valve having improved sealing between the valve member and the valve body is presented. Improved sealing is realized by providing a sealing member that is allowed to float on the outer surface of the valve member in the closed position. By being able to float on the outer surface, the sealing member can compensate for any variations in the valve member as a result of machining tolerances or variations in position of the valve member due to changes in pressure within the valve, thereby providing dynamic sealing The dynamic sealing is also provided by configuring the valve member such that it causes the sealing member to be exposed to a higher biasing force in the closed position than in the open position.

Abstract: A flow control device is configured to facilitate the addition and removal of fluid to and from a cooling system using a rotatable valve member. The rotatable valve member is positioned within an opening in a base member. The rotatable member is movable within the opening between a first position and a second position. When the rotatable member is in the first position, at least two user ports are in fluid communication with one another via at least one passageway of the rotatable member. When the rotatable member is in the second position, two user ports and two external ports are in fluid communication with one another via the at least one passageway of the rotatable member.

Abstract: A shear valve, for use in a high performance liquid chromatography system, comprises a first shear valve member and a second shear valve member. At least one of the first and second shear valve members is adapted to be moved with respect to the other. One of the first and second shear valve members comprises a plurality of ports, and the other comprises at least one fluid path for fluidly coupling respective ones of the ports in dependency on a relative movement position of the first and second shear valve members with respect to each other. The first shear valve member is at least partially coated with or comprised of silicon carbide.

Abstract: A rotary valve (10) for distributing a flow of a fluid is provided, the valve comprising a stator (11) and a rotor (12). Furthermore a chromatography system, comprising such a rotary valve and three different components or component groups connected to the valve is provided. With this rotary valve according to the invention the flow direction is kept constant through one of the three components or component groups while the flow direction through the other two component or component groups can be changed.

Abstract: The invention relates to a valve for controlling volumetric flows in a heating and/or cooling system of a motor vehicle, comprising a valve housing (10), from which at least one inlet channel (18) and at least one outlet channel (20, 22) branch, in addition to at least one disc-type valve body (28) for controlling the flow, said body being located in the valve housing (10) so that it can rotate about the axis (31) of a driven shaft (30). According to the invention, the valve comprises means for compensating an imbalance, said means ensuring a uniform distribution of mass about the rotational axis (31) of the valve body (28). The invention also relates to a heating and/or cooling circuit (110) of motor vehicle, comprising at least one coolant control valve (131) of this type.

Abstract: The invention is a shared gas valve which has a valve body with a valve core therein. The valve body has inlet for gas a, the valve core has a gas passage therein with an inlet for gas a and an inlet for gas b on each side. The inlet for gas a and inlet for gas b can connect with said gas passage separately. The valve core has another opening of supplementary inlet for gas a. The valve body has a primary gasway and a supplementary gasway therein and each gasway has a outlet nozzle. The primary gasway is connected with gas passage directly and the supplementary gasway can connect with the a supplementary gas inlet. This invention overcomes the shortages of traditional valve in structure for that there is no need to replace any component or part when changing the gas. It is safe and convenient for use. At the same time, waste could be reduced and the risk of incurring disastrous accident is lessened and thus benefit mankind.

Abstract: A water control valve, which has one valve cartridge to control the temperature and flow rate of hot water, cold water or a mix of hot and cold water only through rotating motions, is disclosed. The valve cartridge (100) has a first fixed disk (120) to guide hot and cold water into the valve cartridge, a rotary disk (130) to control the flow rate of hot and cold water from the first fixed disk, thus controlling the temperature of water, a second fixed disk (140) to guide controlled water in the cartridge, a temperature control unit (170) to rotate the rotary disk during rotation of a temperature control lever, the moving unit (150) to linearly move toward or away from the second fixed disk, thus controlling the flow rate of discharged water, and a flow rate control unit (160) to cause linear movement of the moving unit by rotation.

Abstract: The invention relates to a device for the controlled guidance of a polymer melt. Said device comprises a housing (1) having an inlet channel (5) and an outlet channel (6) for the polymer melt in which housing a control element can be displaced between the exits of the inlet channel (5) and the outlet channel (6) perpendicular to the inlet channel (5) and the outlet channel (6) in a sealing manner. A rotatable pin (2, 15) is used as the control element and has a flow channel (3, 16) for the polymer melt to flow through and can be rotated from a first to a second position by means of a rotary arm (9). The aim of the invention is to provide a device of the above type which is compact, inexpensive and allows various functions to be carried out with few different components. For this purpose, the flow channel (3, 16) is eccentric in relation to the rotatable pin (2, 15).

Abstract: A rotary valve unit which reduces the torque required to turn the valve disc, and the amount of wear dust that is blown into the cold head, using differential gas forces to keep the valve disc in contact with the valve seat, and which enables larger diameter valve discs to be utilized for multi-ported pulse tubes that have less force on the face of the valve disc, resulting in reduced torque and reduced wear rate.

Abstract: The present invention is for dissolving a metal complex and a low-pressure additive gas in a supercritical fluid and supplying the same continuously to a reaction vessel, aiming to provide a method and an apparatus for adding a low-pressure gas to a high-pressure supercritical fluid continuously, so that a gas which should be handled with care, such as a combustible gas, can be added to a supercritical fluid without compression. The method for continuously adding a low-pressure gas to a supercritical fluid comprises supplying a reactant gas to a supercritical fluid or a subcritical fluid by repeating, in an alternate manner, a step of storing a reactant gas midway through a piping in a low-pressure state and a step of carrying the reactant gas toward a reaction vessel with the supercritical fluid or the subcritical fluid, so that the reactant gas is continuously charged in the reaction vessel.

Abstract: A splitter for faucets includes a body in which a control unit is received. The control unit includes a collar in which a ceramic disk is received. The ceramic disk has a plurality of through holes and a number of the through holes is equal to a number of the outlets of the body. A ceramic plate is connected to the ceramic disk so as to cover some of the through holes in the ceramic disk. The ceramic disk is connected with a control shaft which has a resilient member on a radial portion thereof. An end member is mounted to radial portion and includes a plurality of gaps so that when the control shaft is rotated, the protrusion on the resilient member is removably engaged with one of the gaps so as to generate a sound.

Abstract: A multi-way valve suitable for use with large particle abrasive slurries. The valve has a housing and a seat piece affixed to the housing that defines a chamber. The seat piece has a conical valve seat. A rotor defines a conical base end that is received in the conical valve seat. A spring member biases the conical base end of the rotor against the conical valve seat to center the rotor and to allow the rotor to glide over large particles and for compensating for wear of the rotor over the lifetime of said rotor. The rotor has a first fluid path that is over a top of the rotor and a second fluid path that is through a bridge passageway in the rotor, thereby pressure balancing said rotor. The first fluid path provides continual flushing of particles from the chamber.

Abstract: A method for operating a multi-track rotary valve having plural tracks for the separate introduction to vessels of at least 3 feed streams and the separate recovery from the vessels of at least 3 product streams and for simultaneous change of the flow paths of the streams. At least one stream is selected and maintained at lower pressure than the other streams so that any leakage flows from the other streams to the at least one selected stream.

Abstract: The present utility model relates to an oil and gas collection and transmission system for petroleum, chemical industry and so on. A multi-way valve with fan-shaped flow channel sealing pair measures in turn the production of an individual well to obtain the dynamic production data of an oil well. The multi-way valve with fan-shaped flow channel sealing pair is characterized in that: a floating gating ring that is applied with contact specific pressure by an elastic component and an upper porous plane body form a gating plane sealing pair; a plurality of fan-shaped flow channel oil inlet holes are annularly and uniformly distributed on a mating surface of the upper porous plane body; the floating gating ring is configured such that it changes gradually from the upper fan-shaped flow channel to the lower round-shaped flow channel; and the inner part of the middle rotary spool is used as a public flow-guide passage.

Abstract: A shear valve assembly that includes a stator element having a body, a stator face and at least a first stator passage and a second stator passage extending through the stator body. The first passage and the second passage terminate at the stator face at a respective first stator port and a respective second stator port. The valve further includes a rotor element that defines a rotor face configured for fluid-tight contact against the stator face at a rotor/stator interface. The rotor face defines a first rotor port and a spaced second rotor port, and a rotor body thereof defines a first subterranean passage extending fully beneath the plane of the rotor face. One end of the subterranean passage terminates at the first rotor port at the rotor face surface, while an opposite end thereof terminates at the second rotor port at the rotor face. The rotor face and the stator face is rotatable about a rotation axis relative one another between a first position and a second position.

Abstract: A stepping motor valve is provided for a refrigerator. The stepping motor valve includes a catching part and a valve body provided at an outer rim portion and a central portion of a bottom surface of a rotator of a stepping motor, respectively. A valve housing and a port support are installed below the stepping motor, and a protrusion is provided on a top surface of the port support. An input port and first and second output ports are provided penetrating through the port support and the protrusion, respectively. Meanwhile, a wire, which protrudes from the interior of the port support and is wrapped around the side surface of the protrusion, is bent at one end thereof in the form of a hook to form a stopper. The stopper formed out of the wire is prevented from being worn, thereby ensuring the operational reliability of the product.

Abstract: A pinion valve body and a vehicle pinion valve assembly with the valve body are disclosed. The pinion valve body has a lower sleeve integrally formed by a sintering process along with upper splines to block an oil leakage and thus there are no needs any more for the conventional separate lower sleeve as well as the associated machining of sleeve fitting areas on the valve body and the process of press-fitting such sleeve all together, thereby effectively reducing the general manufacturing steps and their cost.

Abstract: The present invention is an exhaust gas recirculation (EGR) valve for an engine having an exhaust gas recirculation cooler operable for receiving exhaust gas from an exhaust, and delivering the exhaust gas to an intake. The present invention also includes an exhaust gas recirculation bypass passage operable for receiving exhaust gas from an exhaust, bypassing the exhaust gas recirculation cooler, and delivering the exhaust gas to an intake, as well as a single valve operably associated with the exhaust gas recirculation cooler and the exhaust gas recirculation bypass passage. The single valve is selectively operable for opening or closing flow from the exhaust to the exhaust gas recirculation cooler, the exhaust gas recirculation bypass passage, or both, the single valve also operable for metering flow therebetween.

Abstract: A vacuum regulator has a vacuum range controller and a manifold including an inlet opening, a vacuum source connection, and a bleed orifice. The vacuum range controller includes a regulator stem having a metering tip, a stem body, and an adjustment rod. The metering tip is selectively positioned against the bleed orifice. The vacuum range controller further includes a vacuum adjuster having an adjustment collar and a resilient member which are coaxially disposed on a portion of the regulator stem. An adjustment knob engages the adjustment rod for concurrent rotational movement therewith.

Abstract: A diverter valve assembly is used in a material handling system and may include a diverter valve, an actuator, a chute, and a material handling line. The diverter valve has a body that defines an inlet bore and a pair of outlet bores. A rotor is located within the body and rotates, depending on factors, between the pair of outlet bores. The actuator is connected to the rotor in a way that it can rotate the rotor. The chute communicates with the inlet bore. And a material handling line communicates with each of the pair of outlet bores.

Abstract: A valve for switching over liquid paths, particularly for pressure exchanger installations with tubular pressure exchanger chambers (3) through which an alternating flow occurs, in which a rotatable control element (10, 10.1) having a plurality of flow paths is mounted in a housing (11), which in turn comprises a plurality of connection opening (12, 16, 17, 46) connected to a first pipe system and to an end of at least one pressure exchanger. Another end of the pressure exchanger is connected to a second pipe system through a valve. A motorized drive shaft (50) rotates the control element so as to alternately connect the control element flow paths to openings inside housing (11). Oncoming flow to the control element may come from an axial direction or from a radial direction, and outgoing flow from the control element occurs in the axial direction.

Abstract: A regulator valve includes an inlet coupled for receiving a spray solution delivered by a fixed displacement pump coupled to a solution tank. Located in the valve body so as to divide the solution received at the inlet between a bypass or tank port of the regulator valve, and a boom port is a ball valve in the form of a hollow sphere having a first circular opening in register with said inlet, a second circular opening in register with said boom port and an elongate, wedge-shaped opening in register with said bypass port. The ball valve is mounted for rotation about an axis which is coaxial with the first circular opening and includes a stem coupled to an electric motor for actuating the valve, the motor being coupled for receiving a control signal for causing the motor to position the ball for dividing the flow so as to achieve a desired solution application rate.

Abstract: The creation discloses a changeover unit for a fuel gas pressure reducer comprising at least two pressure reducers applicable for various kinds of fuel gases, and a changeover valve for connecting a gas source to the pressure reducers. Said changeover valve further comprises a valve body accommodating groove, and a valve core mounted within the valve body accommodating groove. The pressure reducers for various kinds of fuel gases are connected by the valve body accommodating groove of the changeover valve, and are applicable for at least two or more kinds of fuel gases by switching the valve core. Users can adjust or change the pressure reducer which matches the kind of fuel gas by themselves in accordance with the kind of fuel gas.

Abstract: A changeover valve assembled with an air compressor includes a valve base, a positioning base, a positioning plate, a shaft, a cover and a rotating knob, a first conduit and a second conduit. The valve base has a chamber communicating with two rooms respectively. The valve base has three connectors; the middle one is connected with an outlet tube of the air compressor and the other two ones are respectively connected with a conduit. The positioning base and the positioning plate have their outer walls fixed with insertion blocks. The shaft has a forcing block fitted in the positioning base. With the rotating knob turned rightward or leftward, the forcing block can be eccentrically whirled to push the positioning base to move aside in the chamber to keep one passage sealed and the other passage unsealed, so air can inflate a tire or pump tire sealant into the tire.

Abstract: A flow path switching valve is provided, in which an impact due to the pressure change when a flow path is switched is prevented from being generated. (A) A rotor slot 1c allows an analysis infusion pump 11 to be connected to an analytical column 13, so as to form a flow path (condensing procedure). (B) The rotor of the flow path switching valve 1 is rotated clockwise for 30 degrees, the rotor slot 1c allows the analysis infusion pump 11, the analytical column 13, and a trap column 5 be connected. After the pressure in the trap column 5 is raised to the same pressure level as that of the analytical column 13, the pressure is stabilized, and the pressure difference between the two columns 5 and 13 is counteracted (high-pressure procedure).

Abstract: The present invention is directed to reduce the dead volume in a flow path with trap functions. A flow path switching valve 1 is provided, which includes a rotor, i.e., rotor 3, and a housing top 9 having four ports 7a-7d connected to external flow paths, wherein two ports used for a mobile phase for analyzing are an inlet port 7a and an outlet port 7b, and the other two ports used for a mobile phase for condensing are an inlet port 7c and an outlet port 7d. In the rotor 3, two circular arc-shaped rotor trenches 11a, 11b for communicating two ports are formed at positions corresponding to the ports 7a-7d. The rotor trench 11b is filled with an adsorbent.

Abstract: A multi valve two-stage pulse tube type GM refrigerator having a rotary valve that comprises one track for flow to the regenerator and two tracks for flow to the pulse tubes where the valve has two high pressure ports to the pulse tubes located on a single track and two low pressure ports from the pulse tubes located on a separate single track and where there are two cooling cycles per revolution of the rotary face valve.

Abstract: A multi-functional flow control valve for a water treatment system includes a valve body having a water inlet port, a water outlet port and an effluent outlet. A valve core connected with a valve rod is placed inside the valve body. The valve body defines a flow channel therein for connecting with an inside and an outside of a filter element of the water treatment system, respectively. The valve core includes a moving valve disk and a fixed valve disk whose head faces are aligned hermetically rotationally. The moving valve disk is connected to the valve rod. The fixed valve disk defines a plurality of through holes which are connected to the water inlet port, the water outlet port and the effluent outlet, respectively. The moving valve disk defines a through hole and two blind recesses therein.

Abstract: A control disk insert for a one lever mixer valve (20) contains two preferably, planar disks, whereof one fixed control disk (24) has at least one opening zone for hot water and at least one opening zone for cold water. The movable control disk (22) facing the fixed control disk (24) and movable with two degrees of freedom can both completely close and continuously completely open the opening zones in the fixed control disk (24). The opening zones of the fixed control disk (24) and the opening zones of the moveable control disk (22) are constructed in such a way that the control disk (22) can be positioned to divert a non-contaminated fluid stream to a separate outlet for connection to various devices. Or, the opening zones of the fixed control disk (24) and the opening zones of the moveable control disk (22) are constructed in such a way that the control disk (22) can be positioned to send a pressure signal or pressure relief signal to an appliance.

Abstract: A multi-port rotary disc valve adapted to allow fluid flow from at least one fluid source to a plurality of destinations, comprises a stator with fluid flow ports including a plurality of individual ports and at least one common port. Each of the individual ports is adapted for fluid communication with at least one of the destinations, and the one common port is adapted for fluid communication with the source. The individual ports are arranged in spaced apart relationship within an individual ports' stator sector having a stator sector angular length. The valve further comprises a rotor having at least a first, a second and a third rotor sector with channels arranged therein, being opened to the atmosphere or adapted to connect the fluid flow ports of the stator between them in a plurality of predetermined combinations.

Abstract: A water outlet device includes a hollow main body having a middle body part surrounding an axis, a water inlet pipe part fluidly communicated with the middle body part, and first and second water outlet pipe parts fluidly communicated with the middle body part via first and second water outlet holes, respectively. The water outlet device further includes a rotatable plug disposed in the middle body part and formed with a water conduit section, and a spring-loaded valve unit mounted to the rotatable plug and angularly spaced apart from the water conduit section relative to the axis. The water outlet device is operable to permit fluid communication between the water inlet pipe part and one of the first and second water outlet pipe parts by blocking one of the first and second water outlet holes that corresponds to the other one of the first and second water outlet pipe parts.

Abstract: A rotary cylinder valve comprises a valve body, a valve cylinder rotationally mounted within the valve body, and first, second, third and fourth valve seats coupled to the valve body. The valve cylinder has a first position in which dual independent flow paths connect the first valve seat with the second valve seat, and connect the third valve seat with the fourth valve seat. The valve cylinder is rotatable to a second position in which the dual independent flow paths connect the first valve seat with the fourth valve seat, and connect the third valve seat with the second valve seat. The valve seats form seals against the valve cylinder, such that no flow path connects the first valve seat with the third valve seat.

Abstract: A flow control valve for selectively routing a coolant in a dual-zone heater system is provided. The flow control valve includes a housing and a flow control device. The housing includes an inlet port, a bypass outlet, a front heater outlet, and a rear heater outlet communicating through an internal cavity. The flow control device, which can be a cylinder, sphere, etc., is rotatably positioned in the internal cavity. The flow control device has an axial channel and generally radial aperture. The axial channel transports the coolant received from the inlet port through the flow control device, and the aperture delivers the coolant to one or more of the bypass outlet, the front heater outlet, and the rear heater outlet as the flow control device is rotated. In this way the circuit is not deadheaded.

Abstract: The present invention provides an improved structure of a water diverter, which includes a housing, a brake axle, a drive seat, a rotary valve, a fixed valve, a base and water inlet/water outlet. The water inlet is placed centrally onto the fixed valve and base, so that one end of the through-flow slot of rotary valve is normally linked to the water inlet. The other end is adapted to different water outlets depending upon the rotation angle of the rotary valve. The water inlet and outlet of the water diverter are incorporated into the bottom of the water diverter, and water flow within fixed valve and rotary valve of ceramic materials is separated from other structural members. Thus, water quality is maintained, and the service life of the water diverter is extended.

Abstract: There is provided a rotary valve for fluid analytical systems. The present valve provides improved characteristics such as an extended lifetime. The valve can fulfil different fluid analytical functions and can be a multi-ports and/or multi-positions valve. The valve is provided with extra recesses in the rotor and extra ports in the stator. These recesses allow to cancel the effect of any possible leaks by evacuating them. Such a valve then prevents cross-port leaks and can advantageously be used in highly critical applications. Moreover, the present valve can be used in an analytical system which is advantageously self-diagnostic.

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

Abstract: Rotary valve comprising (a) a rotor having a rotor face rotatable about an axis perpendicular to the rotor face, a plurality of openings, and at least one passage connecting at least one pair of the plurality of openings; (b) a stator having a stator face in sealing contact with the rotor face to form a planar rotary valve seal with an outer periphery, a plurality of openings in the stator face that are connected to respective passages through the stator, and wherein at least one of the passages through the stator is a stator vacuum passage directly connected to a vacuum pump; (c) a sealed valve chamber having an interior volume contiguous with the outer periphery of the rotary valve seal, which chamber is sealed from the atmosphere surrounding the rotary valve; and (d) a vacuum vent passage connected to the sealed valve chamber.

Abstract: An air current distributing apparatus includes: a cylinder having a first air port communicated with a supply source of an air current and also having a second, a third, a fourth and a fifth air port respectively communicated with an injection port of the air current; a main rotor rotated in the cylinder; and a subrotor rotated in the cylinder, wherein the main rotor has a cutout portion for selectively communicating the first air port with at least one of the second and the third air port according to the rotary position, and the subrotor has a cutout portion for selectively communicating the first air port with at least one of the fourth and the fifth air port according to the rotary position. When the air current distributing apparatus is used, a plurality of air currents are formed by one blower.

Abstract: A valve including a body delimiting an inlet duct opening into a first and second outlet duct. The body includes a first butterfly valve element and a second butterfly valve element. The first butterfly valve element is mounted on a first transmission gearwheel connected to a drive motor and is movable into two closed positions on either side of an open position of the first duct. The first transmission gearwheel is connected to a second transmission gearwheel, on which the second butterfly valve element is connected by a one-way positive drive element. When the first butterfly valve element is moved from an open position to one of the two closed positions in the first duct, the second butterfly valve element is driven from a closed position to an open position of the second duct. The valve includes a member for returning the second butterfly valve element to the closed position.