Abstract: A non-riser valve assembly 30 includes a bonnet or housing 32, a bushing 34, a stem 36, a washer 38 and a stop 40. The assembly 30 further includes a coupling 42, a rotatable or movable disk 44, a fixed disk 46 and a bottom seal 48. In assembly, the bushing 34 and the stem 36 are located within an opening 50 of the housing 32 with the bushing being located between the housing and the stem. One of the stem 36 extends from one end of the opening 50 and the stop 40 is removably attached to the stem to limit the rotational movement of the stem within the housing. The coupling 42 is located in the opening 50 of the housing 32 and is in driving engagement with the opposite end of the stem 36. The movable disk 44 is located with the opening 50 and is coupled to the coupling 42 for rotation therewith. The fixed disk 46 is attached to the housing 32 within the opening 50 and is formed with a surface 224 which is in water-sealing engagement with a surface 162 of the movable disk 44.

Abstract: A rotary fluid valve has a pivotable disk (36) with through slots (38, 39), the disk blocking outer ends of ports (31, 32) in a neutral disk position. When the disk pivots in first or second directions from the neutral position, one of its slots moves into line with one of the ports. This allows pressured air to flow from the now-uncovered port and through the disk slot, and through an upper chamber (46) lying against the upper face of the disk, to allow air to flow between an external fluid coupling (17 or 18) that is coupled to the port, to another external coupling (19, 20) that is coupled to the upper chamber, as to inflate or deflate a vehicle air bag.

Abstract: A fluid control valve is described having a valve housing having first and second valve housing openings for the ingress and egress of fluid through the control valve. Disposed within a void formed by the control valve is a sleeve having at least one sleeve opening to permit the flow of fluid therethrough. A flow restricter travels within the sleeve to progressively block off the sleeve opening and thereby control flow. A fluid passageway is formed between the first valve housing opening and the outer surface of the sleeve. A second fluid passageway is formed between the inside of the sleeve and the second valve housing opening. Neither fluid passageway contains more than one 90.degree. turn. In the preferred embodiment only one of the two fluid passageways contains a 90.degree. turn. In another embodiment, the control valve housing is bifurcated by a control surface having control surface opening disposed therethrough.

Abstract: A non-riser valve assembly 30 includes a bonnet or housing 32, a bushing 34, a stem 36, a washer 38 and a stop 40. The assembly 30 further includes a coupling 42, a rotatable or movable disk 44, a fixed disk 46 and a bottom seal 48. In assembly, the bushing 34 and the stem 36 are located within an opening 50 of the housing 32 with the bushing being located between the housing and the stem. One of the stem 36 extends from one end of the opening 50 and the stop 40 is removably attached to the stem to limit the rotational movement of the stem within the housing. The coupling 42 is located in the opening 50 of the housing 32 and is in driving engagement with the opposite end of the stem 36. The movable disk 44 is located with the opening 50 and is coupled to the coupling 42 for rotation therewith. The fixed disk 46 is attached to the housing 32 within the opening 50 and is formed with a surface 224 which is in water-sealing engagement with a surface 162 of the movable disk 44.

Abstract: An actuator for opening and closing a valve with less resistance. The actuator includes a rotor, a stator, a valve and a shaft. The shaft having a first and second end, and an axis extending longitudinally therethrough. The stator, having an electromagnet mounted thereon, and circumferentially mounted around the shaft that extends therethrough. The rotor, fixedly mounted circumferentially around the first end, and having a permanent magnet mounted adjacent to the electromagnet and spaced a first distance therefrom. The valve including a rotary valve and valve seat. The rotary valve, mounted circumferentially around and near the second end, having a valve opening therein. The valve seat, mounted adjacent the rotary valve, having a seat valve opening therein, and fixedly attached to the stator.

Abstract: A gas range includes a gas distribution system which utilizes a gas manifold that includes a single gas inlet chamber. Communication between the gas inlet chamber and each of the burners is controlled by a respective valve assembly mounted in the gas inlet chamber. One of the valve assemblies is thermostatically controlled in response to a sensed temperature. The length of the gas manifold can be dictated by the spacing of the individual valve assemblies or it can be dictated by the spacing of the burners. The gas distribution system provides additional flexibility to the range designer while reducing costs by eliminating components.

Abstract: A gas range includes a gas distribution system which incorporates a multi-chambered gas manifold. The gas manifold includes a single gas inlet chamber and a plurality of gas outlet chambers. Communication between the gas inlet chamber and each gas outlet chamber is controlled by a respective rotating disc element which controls the flow of gas between the two chambers. The length of the gas manifold can be dictated by the spacing of the individual disc elements or it can be dictated by the spacing of the burners. The gas distribution system provides additional flexibility to the range designer while reducing costs by eliminating components.

Abstract: A water valve for a sanitary fitting having a valve body containing a metal half, preferably made of brass, which contains a bearing arrangement for a spindle and a plastic half which contains two ceramic packing discs and a driving element, an inlet seal packing opposite one of the ceramic packing discs and water outlet holes. The plastic half is latched into position with the metal half whereby the metal half has a threaded surface on the lower rim of its external surface when assembled.

Abstract: An apparatus for controlling the flow of fluids between a main conduit and a plurality of secondary conduits includes a valve body having a wall defining a cylindrical bore, the wall having a plurality of ports in respective flow communications with the main conduit and the secondary conduits, and a valve element rotatably disposed within the cylindrical bore of the valve body. The valve element body has internal flow paths with openings flush with a peripheral surface of the valve element body and a channel in flow communication with one of the flow paths, the channel having an opening extending from one of the openings of one of the internal flow paths. In addition, one of the internal flow paths has an enlarged opening to accommodate flow through the channel. The valve element and valve body cooperate to permit fluid flow between the main conduit and a selected one of the secondary conduits by rotating the valve element to align the openings of the channel and the flow paths relative to the ports.

Abstract: This invention generally relates to fluid valves and, more particularly, to water supply hydrants. The hydrant (40) according to the invention comprises a handle assembly (60) which is operationally mounted to a valve (100) which, in turn, is fluidly interconnected to a source of pressurized fluid. The handle assembly is configured so that a limited amount of rotation of the handle assembly actuates the valve. In one embodiment, the handle assembly is provided with an axial conduit which is adapted to dispense fluid delivered from the valve. In another embodiment, a flexible conduit is located between the handle assembly and a body portion of the hydrant so that the fluid dispensed from the hydrant can be aimed in a particular direction.

Abstract: A valve for a faucet includes a housing having two retainers and one stop extended upward from the upper peripheral edge. A control stem may control the water flowing in and out of the housing. A cap has two orifices for engaging with the retainers and includes a radially extended annular flange having a notch for engaging with the stop and for solidly securing the cap to the housing. A sealing ring is engaged between the cap and the housing for making a water tight seal between the cap and the housing and for preventing water from flowing out of the housing.

Abstract: A water saving device comprising a plate member which is sandwiched within and maintained within a joint portion of a tap water line and divides the tap water line across the line of water flow. A main body block is bolted to one side of the plate member along the axis of and positioned in the middle of tap water line. The plate and the main body block each has a plurality of water saving holes arranged circumferentially so that the number of opposing holes in the plate and the main body block which are aligned to allow water flow therethrough can be changed by relative rotation of the plate member with the main body block around bolt 13.

Abstract: A control valve is provided for a water conditioning system having a mineral tank. The control valve includes a housing having an upper body portion and a lower body portion. The housing defines a chamber located between the upper and lower body portions. The upper body portion includes a first upper port, a second upper port, and a third upper port. The lower body portion includes a first lower port, second lower port, and a third lower port which provide fluid communication with the tank. A cylindrical disk is located within the chamber and is selectively rotatable about a central axis. The disk includes an upper face having a generally centrally located aperture and a peripherally located aperture. The disk also includes a spaced apart lower face having a first peripherally located aperture and a second peripherally located aperture. A first fluid passage extends through the disk between the centrally located aperture in the upper face and the first peripherally located aperture in the lower face.

Abstract: An adjustable oil metering valve for a compressed air lubricator includes a lower, fixed member (20) having a central, downwardly extending oil delivery nozzle (30) and a peripherally ramped upper surface (29) in communication with the nozzle (30). Seated on the surface (29), and rotatable relative thereto, is a valve member (21) that includes a lower disc portion (31) having a radial channel (35) formed in its lower surface. The lower surface of the rotatable disc portion (31) and the upper surface (29) of the fixed member (20) thereby define between them a peripheral gap (H) of progressively varying height into which the oil is fed whence it flows to the nozzle (30) via the channel (35). The rate of flow of oil to the nozzle (30) is substantially proportional to the height of the gap (H) at the angular location of the outer end of the channel (35) which may be selectively varied by rotating the valve member (21).

Abstract: An adjustable valve is inserted in a tubular connection extending between an inlet lien and overflow pipe in the flush tank of a flush toilet. By adjusting the rate of flow through the valve, the level of water standing in the toilet is determined.

Abstract: A valve assembly has a fixed disk and a movable disk. The fixed valve disk has a flat face centered on an axis and is formed to one side of the axis with an axially throughgoing aperture. The normally rotary movable valve disk has a flat face bearing on the fixed-disk face and formed to one side of the axis with an axially throughgoing aperture. Thus on rotation of the rotary disk about the axis relative to the fixed disk the apertures are moved between an aligned position in which fluid can pass through the apertures and a nonaligned position in which each disk at least partially blocks the aperture of the other disk. One of the disks is formed at the respective face to the other side of the axis with an inwardly open recess positioned so as to be exposed by the aperture of the other disk in the nonaligned position.

Abstract: An air flow rate regulation apparatus is used for regulating a flow rate of discharge air of an air pump used for breeding aquarium fishes. The apparatus includes a cylindrical control member having a hollow chamber defined thereinside and a regulation hole formed in the outer peripheral surface thereof and a cylindrical regulation member having a regulation recess overlapping with the regulation hole and made of a flexible material. The regulation member is rotatably fitted over the outer peripheral surface of the control member so as to adjustably cover the regulation hole, and the overlapped area of the regulation hole and the regulation recess is increased or decreased by rotating the control member and the regulation member relative to each other so that the overlap area can be continuously increased or decreased over a broad range of the rotating angle, 90.degree. or larger, of the control member and the regulation member.

Abstract: A disk valve for a fluid under pressure, inside a housing (10), and comprising one, fixed plate cam (26), which has one port (32). A second, rotatable plate cam (34) which also has a port (36) is mounted above the fixed disk cam (26). The ports (32, 36) are eccentric to the axis of rotation of the rotating disk cam (34) such that they can be brought from an aligned open position into a misaligned closed position by rotating the rotating plate cam (34). A pressure relief surface (44, Ae), concentric to the axis of rotation, is provided on the rotating plate cam (34) and this surface is in contact with the outlet pressure of the fluid, in the closed position at least.

Abstract: A valve and method for adjusting the flow of a valve and for forming a turbulence in the flow. The flow is led tangentially from the inlet passage (2) into the space inside the valve body (1) in such a way that a turbulent flow is formed inside the valve body, outside the closure member. The flow volume is adjusted before the flow is brought into turbulence.

Abstract: A hot water tempering system tempers the output of a hot water storage tank by mixing that output with a cold water flow in a defined ratio to produce a flow of water at a steady intermediate temperature. The system comprises a bypass line connectable between an inlet line and an outlet line of the storage tank, and a proportional flow controller for controlling the relative water flow rates through the tank and through the bypass line. The flow controller may be positioned on the inlet line and the bypass line, or on the outlet line and the bypass line. The tempering system allows the temperature of water in the storage tank to be maintained near the boiling point for killing organisms, but at the same time ensures that water leaves the system at a temperature sufficiently low to be safe for human use.

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: An air-flow meter for milking machines, comprising an enclosed housing with a connection to a line that is to be tested for flow and pressure and with an air-intake mechanism with a variable cross-section. The air-intake mechanism is an air intake with a slot-shaped cross-section. A rotating cylinder is accommodated inside the housing and operates in conjunction with the slotted intake. The cylinder has a breach that tapers out along a considerable length of its circumference. The longitudinal axis of the intake parallels the axis the cylinder rotates around, the free cross-section of the intake is only a fraction of length of the breach along the circumference of the cylinder, and any area of the breach can be aligned with the air intake by rotating the cylinder.

Abstract: Flow restrictor apparatus utilizes a pair of relatively movable disks. One disk includes an output bore communicating with a groove cut into one face of the disk. The groove is generally circular in configuration. The other disk includes an input bore which communicates with the groove in the opposite disk when the two disks are assembled together. Varying the location of the input bore relative to the groove varies the flow of fluid through the apparatus. A pair of O-rings seal the groove and the two disk elements. A second embodiment utilizes a metering disk disposed between two fixed disks. The fixed disks include aligned bores for input and output, and the metering disk includes aligned grooves on the surfaces which face the fixed disks and a bore through the metering disk joining the aligned grooves.

Abstract: A water proportioning device for steam irons, has a valve (52) arranged between a water reservoir (1) and a steam-generating chamber (2). The valve includes a valve member (5) having a valve opening (7) and a valve pin (9) in sealing engagement within the valve opening (7) and provided with a longitudinal groove (15). The valve pin (9) is rotatable within the valve opening (7) and movable from a closed position into an open position and vice versa by a rotary motion. The valve member (5) includes a skirt (6) encompassing the valve pin (9) and having a radial opening (18). In the closed position, one end of the longitudinal groove (15) is within the skirt (6), while in the open position the end of the longitudinal groove (15) is in communication with the opening (18) in the skirt (6).

Abstract: A relief valve for regulating the operation of a surgical suction device comprises a plunger adjustably screwable into a fluid escape channel. A conical tip at the end of the plunger is shaped and dimensioned to progressively obstruct an escape port. Longitudinal grooves along the threaded walls of the plunger provide a passage for the fluid from or toward the escape port.

Abstract: A method and a metering valve for metering a fluid by incrementally adjusting a position of a flow control element that directly varies a flow area of a flow port opening in a valve housing. The flow control element is adjustably mounted with respect to the valve housing. The metering valve maintains an approximately constant percentage variation of a mass flow rate of a fluid with respect to the current total flow rate flowing through the flow port opening, for each incremental adjustment of the flow control element position, throughout the metering range of the metering valve yielding an exponentially varying mass flow rate as a result of linearly varying the flow control element position.

Abstract: There is disclosed a pressure-compensated mixing valve of the diaphragm and reciprocating piston type, wherein a flexible connection between the diaphragm and the pistons is provided. This flexible connection affords a self-alignment of the pistons in water inlet passages. In a preferred manner, this is used with a mixing valve providing alignment of a ported ring member that also provides in part an internal stop feature.

Abstract: A reciprocatory piston type compressor having a compressor body in which a low pressure suction chamber for the refrigerant before compression, a discharge chamber for the refrigerant after compression, and a plurality of axial cylinder bores receiving a corresponding number of reciprocatory pistons are provided therein, and a rotating plate suction valve capable of mechanically and forcibly opening suction ports in synchronism with the suction stroke of the reciprocatory pistons to thereby permit the refrigerant gas before compression to be drawn into the cylinder bores without time delay. A discharge valve capable of mechanically and forcibly open the discharge ports in synchronism with the discharge stroke of the pistons is also provided in the compressor body.

Abstract: A variable flow rate expansion valve designed for in-line installation in a fluid conveying conduit such as between the high pressure condenser and lower pressure evaporator of a refrigeration system includes an integrally defined restrictor disc and a closure disc for controlling the flow of fluid through the valve. The restrictor disc has a first set of flow apertures and the closure disc a second set of flow apertures. The closure disc is rotatably coupled to the restrictor device in a plane parallel to the plane of the restrictor disc and perpendicular to refrigerant flow. A stepper motor is coupled to the closure disc through a linear actuator. Movement of the linear actuator causes the closure disc to rotate relative to the restrictor disc such that the flow apertures of the closure disc are selectively brought into and out of registry with the apertures of the restrictor disc.

Abstract: A device for restricting flow of fluids and reducing noise that minimizes filling losses and muffles the vent noise, for example, while gravity filling cryogenic cylinders from a storage tank. The filling loss reducer part of this device is comprised of valve body, rotor, valve seat, o-ring, springs, and ball bearings. The noise muffler is comprised of a cylinder with tubes inside it. The loss reducer and muffler are assembled together to form the device. In operation, when filling cryogenic cylinders, for example, the device is screwed on to the vent valve of the cryogenic cylinder being filled. During the fill process, vent gases from the cryogenic cylinder pass through an orifice in the device. The size of the orifice can be changed to any one of the multiple discrete sizes by manually turning the rotor. This manipulation of the orifice size changes the pressure difference between the storage tank and the cryogenic cylinder.

Abstract: A top entry flow control valve having a body with an inlet port, an outlet port and an access opening. The body has a cavity connected with the access opening and communicating with the inlet port and outlet port to allow fluid flow through the valve body. A pair of discs with orifices are positioned within the cavity to control flow into the outlet port by rotating one of the discs to change the degree of alignment between the disc orifices. A sleeve, a wear sleeve and a rotatable cylinder are located within the cavity to control flow from the inlet port. The sleeve and the cylinder both have side walls with a set orifices. One disc is secured within the open end of the rotatable cylinder and the other disc is secured to the wear sleeve. By rotating the cylinder, the alignments of the sleeve orifices with the cylinder orifices and of the orifices of the two discs are changed to control flow through the valve.

Abstract: A flow-control valve has a housing having a chamber into which opens a port, a ceramic valve plate fixed in the chamber over the port, formed with a throughgoing aperture aligned with the port, and having a substantially planar face, and a ceramic control plate having a substantially planar face lying flatly on the valve-plate face and formed with a throughgoing aperture. The control plate can be pivoted relative to the valve plate about an axis substantially perpendicular to and traversing the surfaces between an open position with the control-plate aperture overlapping the valve-plate aperture and a closed position with the control-plate aperture aligned axially with a portion of the valve-plate face and offset angularly from the valve-plate aperture and with the valve-plate aperture aligned axially with a portion of the control-plate face and offset angularly from the control-plate aperture.

Abstract: A magnetic control-type flow control valve includes a driven magnet ring disposed rotatably in a metal tube unit, a rotatable circular valve piece connected to a bottom end of the driven magnet ring and formed with first openings, a stationary circular valve piece secured in the metal tube unit and in tight contact with the rotatable valve piece, and a driving magnet ring sleeved on the metal tube unit and rotatable to rotate the driven magnet ring therewith so as to rotate correspondingly the rotatable valve piece in order to cover selectively second openings formed in the stationary valve piece.

Abstract: A fluid flow regulating valve adapted to prevent the operation of the valve from violent pressure change, namely the hydraulic ram effect, in the fluid, particularly during closing and opening of the valve, the valve comprising a casing that houses a regulating plate slidably mounted within the casing. The plate has a regulating orifice having a variable fluid pass section which decreases from an end to another end of the orifice. The orifice is adapted to be aligned, through its different sections, with inlet and outlet ports provided in the casing, whereby the inlet and outlet ports communicate to each other through the orifice and the fluid flow can be regulated by those different sections of the orifice.

Abstract: A device, in particular for controlling a throttle cross-section in an operating fluid carrying line of an internal combustion engine, has a housing provided with a bore and a throttle aperture, an inlet connecting piece associated with the housing, a rotary valve acting as a throttling organ and being centrally arranged so as to be rotatable in the housing and closing the throttle aperture to a greater or a lesser extent, so that a fluid to be controlled passes through the inlet connection piece directly via the throttle opening. The rotary valve has a shaft with an axis, and also has a control edge and a rear edge which is opposite to the control edge. The control edge and the rear edge both extend obliquely relative to the axis of the shaft of the rotary valve.

Abstract: The disclosure relates to an apparatus for injecting slurry/liquid into the ground comprising a chassis (11, 12), a plurality of injectors (39) mounted on the chassis for penetrating and delivering slurry into the ground and means (55) mounted on the chassis for feeding the ground injectors from a slurry supply. The feeding means comprises an annular chamber (60) having an axially positioned inlet (68) and a plurality of outlets (62) spaced around the chamber axis and connected to the respective ground injectors (39) and a diametrically extending rotary distribution valve (86) in the chamber having a throughway in communication with the inlet and an outlet orifices (90) which sweep over the chamber outlets with rotation of the valve to deliver a quantity of slurry to each outlet.

Abstract: A supply valve and an arrangement for supplying, testing and draining a fire suppression water sprinkler system includes a supply valve which has a valve member with at least first, second and third ports. The selective rotation of the valve member varies communication between the inlet of the valve and one or more outlets for the valve. A sensor for detecting a flow of water through the supply valve is provided within valve member and has a member which is generally aligned with a turning axis of the valve member. The flow sensor arrangement may be provided in a valve of general utility.

Abstract: A gasoline blending and dispensing system delivers a predetermined blend of low and high octane gasoline from low and high octane gasoline supply tanks to a nozzle for dispensing from the system. The system includes a valve responsive to valve control signals produced by a valve control for regulating the flows of the low and high octane gasolines for dispensing the predetermined blend.

Abstract: An orifice assembly for use in sealed fluid connection between a gas inlet and gas outlet in a gas flow meter includes a rotor positioned for rotatable movement in fluid connection with both the gas inlet and gas outlet. The rotor includes a plurality of bores in a first circular plate and a matching number of gas passageways in a second circular plate, the passageways being aligned with the bores. The rotor also includes an annular groove separating the first and second circular plates and in fluid communication with the gas inlet for introducing gas into the gas passageways. A plug is adjustably positioned in each bore and axially movable toward the corresponding gas passageway to partially block gas flow from the inlet toward the outlet.

Abstract: A rotary servo or throttle valve comprises a housing defining a chamber and discharge port in fluid communication with the chamber, a rotary valve spool for delivering fluid into the chamber, and a system for delivering pressurized fluid passing from the outlet opening of the valve in the chamber to the discharge port in the housing in which non-cavitating technology can be readily incorporated. The outlet opening of the valve spool is a wedge shaped groove formed in its periphery, the groove having opposed, arcuately diverging sidewalls. The diffusing system comprises an elongated member which may be rotated in the chamber to align a plurality of flow paths with the discharge port and the outlet opening. The elongated member and valve spool may be rotated independently in opposite directions to obtain faster flow rate changes.

Abstract: A brake cylinder pressure retainer valve device for a railway car having a "direct" exhaust position, a "slow direct" exhaust position, and a "high pressure" retention position. A cavity in the retainer valve body has a central pedestal on which a rotary type disc valve is mounted. The disc valve has different sized ports via which pressure is connected from an inlet port (in the retainer valve body) to an outlet port depending upon the position of a manually operated handle to which the disc valve is connected. One such port is associated with a spring loaded check valve to provide the "high pressure" retention of the brake cylinder exhaust pressure. A laterally flexible sidewall of the disc valve member is formed with 180.degree.

Abstract: A valve apparatus, in particular a rotatable valve comprising an upper part (10) and a lower part (6) which are demountably attached to each other. The valve's lower part (6) is mainly U-formed with sealing surfaces (17,18) arranged on the outwardly facing side faces, which sealing surfaces, in the case of closed valve bear against at least one valve seat on the valve housing's inlet and/or outlet end, and upper part's (10) external face is designed for totally or partly supporting bearing against lower part's (6) internal face and comprising a passage (34) designed to accommodate equipment, for example controlling or metering instruments in the upper part (10) can, in the case of closed valve, be lifted out of the valve housing (1) for maintenance.

Abstract: A top entry flow control valve having a body with an inlet port, an outlet port and an access opening. The body has a cavity connected with the access opening and communicating with the inlet port and outlet port to allow fluid flow through the valve body. A pair of discs with orifices are positioned within the cavity to control flow into the outlet port by rotating one of the discs to change the degree of alignment between the disc orifices. A sleeve and rotatable cylinder are located within the cavity to control flow from the inlet port. The sleeve has a bore which receives the cylinder and a side wall with orifices extending into the bore. The cylinder has an open end which extends into the cylinder to form a chamber and a side wall with orifices penetrating into the chamber. The open end of the cylinder is attached to the rotatable disc. By rotating the cylinder, the alignment of the sleeve orifices with the cylinder orifices is changed to control flow from the inlet port into the chamber.

Abstract: A simple, low cost, and reliable, normally cyclic, fluid control valve that in preferred configuration includes one or more rotary valve elements where such valve elements have openings that align with each other and/or with a flow passageway thus forming an aperture for fluid flow during valve cycles. Rotary valve elements may be oriented in different directions to connecting ducts and may have a variety of shapes with a preferred shape being cylindrical. Simple motors drive rotary valve elements such that a rate of valve cycling and/or amount of aperture can be easily controlled by a controller such as a microprocessor. Easy valve servicing and installation are other features. Dynamic sealing of the fluids is preferably accomplished by use of simple low cost labyrinth seals.

Abstract: Valve top, in particular for water fittings, with a spindle rotatable in a head-piece and a sealed grease chamber in the head-piece. The lower end of the spindle is mounted and supported in the head-piece by means of a bearing element of plastic, the bearing and supporting faces being arranged inside the sealed grease chamber. Preferably the bearing element is made in one piece with a damping element of plastic.

Abstract: In a "half-turn" type two-disc tap, the two discs are superposed and in contact to adjust the flow rate of a liquid. Each disc has first and second openings situated on respective sides of a predetermined diameter of the disc. The first opening is situated in the central part of the disc and the second opening is situated at the periphery of the disc so that in the closed position of the tap is openings of each disc are separated from the openings of the other disc and in the maximum open position of the tap the first and second openings are respectively and conjointly superposed over an angle just less than 360.degree..

Abstract: This selector valve (20) may be used to control flow from a chemical supply (22) and a proportioner (14) attached to a faucet (12). The valve includes a valve body (30) having a central passage (32) receiving a rotatable stem assembly (38) having a stem (40) provided with interior passages (94, 96). The stem passages (94, 96) selectively communicate between an inlet line (18) and any one of a plurality of transverse intermediate passages (44, 46 and 48), or a transverse outlet passage (50), and an outlet line (16) depending on the rotational position of said stem (40). Each intermediate passage (44, 46 and 48) includes a metering adaptor (54, 56 and 58) and the outlet passage (50) also includes a metering adaptor (60). When the stem passages (96) is aligned with the metering adaptor (54, 56 and 58) of an intermediate passage (44, 46 and 48) fluid flows through that adaptor by way of connecting passages (102, 100, 104 and 87) to the outlet line (16).

Abstract: A disc orifice valve for providing a constant volume of fluid flowing through a high pressure fluid line is formed by a valve body having in-line inlet and outlet ports. Dual bores in the valve body transversely intersecting the fluid flow passageway between the inlet and outlet ports respectively receive multiple orifice discs for controlling the volume of fluid entering the valve and a poppet valve assembly controlled by a diaphragm fluid pressure balanced on its opposite sides maintaining the poppet valve in an open position in accordance with the volume of fluid at the inlet port and biased open by spring pressure.

Abstract: The invention relates to a pair of overlapping ceramic disks for the opening and closing of screw type valves, where there is a fixed disk (11) with lateral slots inside the valve body and another disk (12) which rests on top of the fixed one (11) and where the fixed disk (11;31) has at least one segment like slot (11a;31a) closed at the perimeter and the movable disk (12;32) has at least one lateral opening (12;32a) which is open both at the bottom towards the fixed disk and radially towards the lateral slots (13a) of the valve body, and closed at the top by a spoked surface so as to improve the water flow conditions.

Abstract: A piezoelectric on-off value for air conditioning comprises a bendable metal plate fixed at one end thereof; a valve member mounted on the other end of the metal plate along a ceiling plate, the value member having vent holes corresponding to vent holes in the ceiling plate, and the valve member changing the relative closure of the vent holes when the metal plate is deformed by application of voltage to the piezoelectric ceramic.