Abstract: Disclosed is a magnetic pressure retaining control device, which comprises: a valve seat, a magnetic valve cover, and a trigger magnetic member for repelling the magnetic valve cover; the magnetic valve cover and an open end of the valve seat are movably connected; when the magnetic valve cover is in an open state, the trigger magnetic member is opposite to an end surface of the magnetic valve cover away from an inside of the valve seat. A cylindrical magnet is also arranged in the valve seat. By the magnetic between the trigger magnet and the magnetic valve cover, and the magnetic between the magnetic valve cover and the valve seat, a reliable guarantee for the closure between the magnetic valve cover and the valve seat is provided. The valve seat and the valve cover are tightly closed under different conditions.

Abstract: The present disclosure provides a flow control valve for controlling the flow of a cleaning media, such as controlling the flow of cleaning media to a nozzle positioned to distribute the cleaning media to a vehicle surface. The flow control valve includes a plunger and a flexible diaphragm which operate to open and close the a fluid passage through the valve. Vehicles and systems incorporating a flow control valve are also provided.

Abstract: The invention relates to a tank device (1) for storing a gaseous medium, in particular hydrogen, comprising a valve device (100) and a tank container (200), wherein the valve device (100) comprises a valve housing (102), in which valve housing (102) a pilot valve element (24) that can be moved along a longitudinal axis (101) of the tank container (100) is disposed. The pilot valve element (24) cooperates with a first sealing seat (18) to open and close a passage opening (20) and thus forms a pilot valve (240), wherein the valve device (2) comprises a solenoid coil (32) by means of which solenoid coil (32) the pilot valve element (24) can be moved along the longitudinal axis (101) of the tank device (1).

Abstract: A diaphragm valve is provided, and includes a diaphragm moveable over a range from a first position to a second position, to open and close an outlet. A control bleed hole extends from a first side of the diaphragm to a second side, opposite the first side. A closing member is moveable to open and close the control bleed hole, to modify the pressure on either side of the diaphragm, and to cause the movement the diaphragm over at least part of the range. A mechanical means is arranged to move the closing member to open and close the control bleed hole. The mechanical means is configured to engage the diaphragm and cause movement of the diaphragm over at least part of the range.

Abstract: The present invention discloses a stator assembly with water-isolating sleeve applied to solenoid valve for water and implementation method thereof, the implementation method comprising: forming a coil assembly with a cavity by installing an element including an insert on a coil rack wound with a coil winding; forming a stator assembly by installing an upper magnetic conductive inner sleeve and a lower magnetic conductive inner sleeve at both sides in a holein the coil rack of the coil assembly, and fixing the yoke connecting the upper magnetic conductive inner sleeve and the lower magnetic conductive inner sleeve outside the coil assembly; injecting plastic on the stator assembly to form the stator assembly with water-isolating sleeve.

Abstract: The present invention discloses a solenoid valve for water capable of enhancing a electromagnetic suction force and an implementation method thereof. the method comprises: obtaining a plastic-sealed stator assembly by injecting plastic on a stator assembly, the plastic-sealed stator assembly; assembling the plastic-sealed stator assembly and a valve body assembly comprising a movable iron core together to form the solenoid valve for water; wherein the upper end face of the movable iron core at the initial position is set as not lower than the upper edge of lower magnetic conductive inner sleeve and not higher than ¼ of the distance from the upper edge of lower magnetic conductive inner sleeve to the lower edge of upper magnetic conductive inner sleeve, so as to enhance the electromagnetic suction force of the solenoid valve for water.

Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on a first end side and a second end side of an axial direction of a coil, a first movable iron core and a second movable iron core located therebetween and attracted by the first fixed iron core and the second fixed iron core by passage of current through the coil, respectively, a spring that biases the first movable iron core to the second fixed iron core side, and a leaf spring that regulates movement of the first movable iron core to the second fixed iron core side with respect to the second movable iron core. The movement of the first movable iron core in a direction orthogonal to the axial direction of the coil with respect to the first fixed iron core and the second fixed iron core is regulated.

Abstract: The disclosure relates to a solenoid valve comprising a housing body made of a thermoplastic, a coil, and a metal yoke which is at least partly arranged about the coil, wherein the housing body is designed as an injection molded part which surrounds the coil, and electrically insulating additives are added to the thermoplastic in order to increase the thermal conductivity thereof. The housing body is formed with grooves on the housing body exterior, and the metal yoke is designed as a component which partly surrounds the housing body and is mechanically connected to same.

Abstract: An electrically-operated ON/OFF valve for a high pressure hydrogen tank for an automotive fuel cell system has a valve body, a solenoid group, a first gate that achieves a first-stage seal, and a sealing element provided with a main sealing surface to achieve a second-stage seal. The first-stage seal and the second-stage seal are both achieved by the sealing element.

Abstract: A sanitary valve (1) for use in a fitting (2), including a valve housing (3), a main valve (4) which has a movable diaphragm (5), and a pilot valve (6), by which the main valve (4) can be actuated. The position of the diaphragm (5) can be specified by the position of a valve tappet (7) of the pilot valve (6), and a tube securing element (9) which is paired with an inlet opening (8) of the valve housing (3) is formed on the valve housing (3) and/or a mouthpiece securing element (11) or a jet regulator securing element which is paired with an outlet opening (10) of the valve housing (3) is formed on the valve housing (3) and/or the sanitary valve (1) has a clamping device (12), by which the valve housing (3) and an adjustment device part (13) can be rigidly connected together or are rigidly connected together.

Abstract: In one aspect, an agricultural row unit is provided an includes a frame, an opener disc rotatably coupled to the frame and configured to open a seed trench, and an applicator assembly coupled to the frame and configured to apply a liquid. The applicator assembly including a housing and a valve coupled to the housing and configured to be in fluid communication with a fluid source. The valve is electronically powered to move to an open condition, in which fluid is configured to pass through and emit from the valve, and electronically powered to move to a closed condition, in which fluid is inhibited from passing through and emitting from the valve. The agricultural row unit also includes a closing wheel coupled to the frame and configured to close the seed trench.

Abstract: A pilot actuated valve assembly includes a valve body having an inlet and an outlet, and includes a main valve, a pilot valve, and a pilot cavity which is at a pilot cavity pressure. A tube houses parts of the pilot valve, and a sleeve engages a portion of the tube, with both being secured to the body by a valve bonnet. The main and pilot valves are coaxial. A solenoid actuator or other suitable actuator is operatively coupled to a shaft of the pilot valve and shifts the pilot valve between the positions. Consequently, the main valve shifts between the closed and open positions in response to shifting of the pilot valve between the closed and open positions.

Abstract: Turbo or super charged intake tract diverter valve system, upstream of a throttle valve, includes a closure means (10) for a diversion aperture (4.1) in the intake tract (3) to vent pressurised gases within to a bypass path or atmosphere; the closure means having a transfer aperture (12) facilitating a net force due to a pressure differential on its opposite sides of the closure means (10) so as to close or keep closed the diversion aperture (4.1). When gas pressure on opposite sides of the closure means is equal, and when an upstream side (10.1) of the closure means (10) has a pressure greater than a downstream side (5.1), then it will open the diversion aperture (4.1). An actuation means opens a control aperture (6) to create the necessary pressure differential on the closure means (10) to thereby cause same to open the diversion aperture (4.1).

Abstract: A hybrid rocket engine with a vortex flow field injection system that produces a high-speed sustained vortex flow field is described. The hybrid rocket engine includes a generally cylindrical injection chamber with an inner circumference to comprise an outer edge of a solid propellant grain in the hybrid rocket engine. The engine also includes an injection system that has a throttle valve and an injector that injects injection fluid into the engine and produces a vortex flow-field for the injected fluid. The injector includes at least one primary feed line that distributes the injection fluid throughout a pre-swirl chamber and multiple orifices along an inner edge of the injection chamber. The pre-swirl chamber connects to the injection chamber and at least one of the primary feed lines and redirects a primary fluid flow of the injected fluid from a primary axial direction to a centrifugal direction.

Abstract: Turbo or super charged intake tract diverter valve system, upstream of a throttle valve, includes a closure means (10) for a diversion aperture (4.1) in the intake tract (3) to vent pressurised gases within to a bypass path or atmosphere; the closure means having a transfer aperture (12) facilitating a net three due to a pressure differential on its opposite sides of the closure means (10) so as to close or keep closed the diversion aperture (4.1). When gas pressure on opposite sides of the closure means is equal, and when an upstream side (10.1) of the closure means (10) has a pressure greater than a downstream side (5.1), then it will open the diversion aperture (4.1). An actuation means opens a control aperture (6) to create the necessary pressure differential on the closure means (10) to thereby cause same to open the diversion aperture (4.1).

Abstract: A diaphragm having an outer surface of a bottom wall that closes a cylindrical circumferential wall constituting a main valve disc part forms a contact surface to be in contact with a valve seat. An annular groove is formed in an inner circumferential portion of a membrane part protruding from the circumferential wall. The groove is concaved to the other axial side from the one axial side, and a sectional shape of the groove is arcuate. A surface of the inner circumferential portion and a surface of the outer circumferential portion in the membrane part are coplanar, the surfaces facing the other axial side. An axial thickness of the outer circumferential portion is ?-? an axial thickness of the main valve disc part, and a minimum axial thickness of the inner circumferential portion is ¼-? the axial thickness of the outer circumferential portion.

Abstract: A valve device that can be activated by pilot air of comparatively low pressure though the size of such valve device is small and provides a valve device that is excellent in durability. The valve device comprises a pilot port which pilot air is supplied to activate a piston part, and a biasing means to press the piston part in the opposite direction to supply and discharge the pilot air, thus controlling the opening and closing of the valve. A first magnetic member is provided on a valve rod; a second magnetic member is provided on a housing. Magnetic attraction is generated between both magnetic members to activate the piston part in the first direction, thus increasing such magnetic attraction by the approach of both magnetic members. An arrangement-relation facing each magnetic member through an air gap is set even when making its closest approach.

Abstract: A solenoid valve for irrigation systems may comprise a gardening tube, a plastic valve piece, a cover and a magnetic member. The gardening tube has a water inlet channel and a water outlet channel which are communicated, and a valve tube vertically extending from the gardening tube has a valve chamber. The valve piece is positioned in the valve chamber. A second connecting tube vertically protruding from the cover has a housing communicated with the valve chamber, and a solenoid coil and a metal ring are respectively disposed on the second connecting tube. The magnetic member has a magnet installed therein, and the magnet has a first magnetic surface and a second magnetic surface at two ends thereof.

Abstract: The present disclosure relates to a switch valve unit, a fluid switch, and a fluid switch assembly. The switch valve unit comprises a valve seat which defines a valve cavity having an open bottom end port; an at least partially axially deformable diaphragm member which is mounted in the valve cavity to divide the valve cavity into an upper cavity portion and a lower cavity portion, and provided with a first hole and a second hole spaced from each other and providing fluid communication between the upper cavity portion and the lower cavity portion; a button axially movably mounted on the valve seat; and a valve rod assembly connected to the button so as to follow the movement of the button, extending through the valve seat and into the upper cavity portion, and having a first position to seal the first hole and a second position to depart from the second first hole.

Abstract: A fluid control valve includes a cylindrical housing with at least one opening through a housing wall, a cylindrical main valve axially movably arranged inside the housing for controlling a fluid flow through the at least one opening and a main valve spring member acting on the main valve. The main valve includes a base wall defining a fluid control volume and fluid main volume in the cylindrical housing. The base wall includes an opening for fluidly connecting the fluid control volume with the fluid main volume. The fluid control valve further includes a pilot valve positioned at the base wall opening, which pilot valve is moveably arranged for controlling a fluid flow through the base wall opening, and an electro-mechanical actuator configured to act on the pilot valve for controlling the main valve via the pilot valve. A method for adjusting the axial position of a cylindrical main valve of a fluid control valve is also provided.

Abstract: A float or a near neutral buoyancy weight operated liquid pressure control valve includes a body which together with an end cap form a cavity and retain a diaphragm therein. A back-pressure chamber is formed between the end cap and the diaphragm and the diaphragm includes a seal section which seats on an inlet port. The diaphragm seal also separates the inlet from an outlet formed in the body. A float support arm reciprocally operates a valve opening and closing control pin mounted in an associated bleed passage formed longitudinally through a control pin mounting. In an open mode the bleed passage vents the chamber. In a closed mode the pressure in the chamber displaces the diaphragm to close the valve. A slide is coupled to the diaphragm so as to be displaced therewith and prevent excessive pressure to distort the diaphragm once the seal closes on port.

Abstract: A system for adjusting water in a domestic water diffuser, in particular for opening and closing water in a shower or bathroom or kitchen sink and for adjusting the flow rate, is described. The system comprises a shutter with at least one metal part slidable inside a cylindrical chamber with a diameter substantially equal to the diameter of the shutter; the system also comprises a pushbutton comprising a magnet; the pushbutton is configured to be operated by means of a finger to mechanically displace the shutter by means of the magnet along an axis of the cylindrical chamber, into two different positions, corresponding to opening of the flow or closing of the flow of water from a diffuser, the pushbutton being also rotatable about the axis, to vary the open position of the shutter along the axis and a corresponding flowrate.

Abstract: An expansion valve according to one embodiment includes a body having an internal passage through which the working fluid flows, a valve hole provided in the internal passage, a driven member that opens and closes a valve section by touching and leaving the valve hole, a guide member that slidably supports the driven member inserted along the guide member, and a shield wall, provided in the driven member, which closes one end opening of the spacing between the driven member and the guide member when the valve section is fully opened.

Abstract: A pressure compensating device for compensating fluid pressure within a sealed enclosure comprises a cylinder divided into a first chamber and a second chamber by a piston, wherein: the first chamber communicates with the enclosure and the second chamber communicates with the environment; the piston is arranged to adjust the relative volumes of the first and second chambers in response to a difference in pressure between the said chambers by moving within the cylinder; and the piston is arranged to allow fluid communication between the enclosure and the environment when the piston is in at least one position within the cylinder.

Abstract: A trip cock device includes a housing, a cam dog, a handle engaging the cam dog, a piston assembly at least partially received within the housing, and a fault detection valve secured to the piston assembly. The piston assembly includes a piston and the fault detection valve is configured to open and close. The fault detection valve engages the cam dog when closed.

Abstract: There are provided a latch valve consuming less power, having a simpler structure, and guaranteeing reliable valve operation, there is provided a flow control device comprising a plurality of latch valves connected in series, and the second to the last latch valves, among the latch valves connected in series, include an additional outflow path constantly communicating with a space part between a support body and a plunger, respectively, to allow water from an inlet to constantly flow out to the additional outflow paths.

Abstract: A safety valve includes a cylinder having an open end and a plug for closing the open end with a hermetic seal. The interior of the cylinder communicates with a high-pressure gas passage. The cylinder is deformed as a function of gas pressure in the high-pressure gas passage to widen the open end. This allows gas in the high-pressure gas passage to escape and thus prevents the gas pressure from increasing beyond an acceptable level.

Abstract: A handle assembly for providing dual flush functionality to a flush valve. The handle assembly comprising a handle and a plunger engagable with each other. The plunger axially slidable in a bush disposed between the handle and the flush valve. The bushing having a passage for receiving the plunger. The plunger having a first and a second axis along which the plunger may travel through the passage. Movement of the handle moves the plunger from first axis to the second axis wherein actuation of the flush valve by the plunger along the first axis results in a different flush volume than actuation along the second axis.

Abstract: A fluid flow valve is disclosed which includes a fluid flow assembly, a piston diaphragm assembly, and a reset plunger pin assembly. These three assemblies are configured to engage one another such that, when used in conjunction with a pressurized water source, they will split the pressurized water source into two portions, the one portion defining a main fluid flow pathway through the valve and, a much smaller proportion, defining a metered fluid flow pathway through the valve. The piston diaphragm assembly has a diaphragm or other equivalent structure for defining a metered fluid flow chamber, which metered fluid flow chamber is fluidly engaged to a pressurized water source through a metering channel in a piston. A reset plunger meter pin assembly engages the metered fluid flow or piston chamber of the piston diaphragm assembly and can initiate a timed flow of water or other fluid into the metered fluid flow chamber, which timed flow controls the flow of fluid or water flowing through the fill valve.

Abstract: A flush valve has a valve body having an inlet and an outlet, a piston disposed in the valve body between the inlet and the outlet, a cartridge disposed in the outlet and a plurality of check valves disposed serially within the cartridge for preventing backflow through the outlet and wherein vacuum effects are minimized.

Abstract: A main valve seat surface for engaging the piston, an outer sidewall, and an inner sidewall defining a flow passage with a first opening and an second opening, the flow passage having a reduced diameter portion.

Abstract: A proportional valve is provided comprising a valve (1) comprising a housing (2) having an inlet (3) and an outlet (4), a valve element (5) being positioned between said inlet (3) and said outlet (4), said valve element (5) being moveable in said housing (2), said valve element (5) having a pilot valve opening (7), a first pressure chamber (16), a pressure in said first pressure chamber (16) acting on said valve element (5) in a first direction, a second pressure chamber (17), a pressure in said pressure chamber (17) acting on said valve element (5) in a second direction opposite to said first direction, a pilot valve element (6) cooperating with said pilot valve opening (7) to form a pilot valve, said pilot valve element (6) being actuated by drive means (8), wherein a flow resistance between said inlet (3) and said first pressure chamber (16) is smaller than a flow resistance between said inlet (3) and said second pressure chamber (17).

Abstract: An automate fluid flow control system includes a relief valve for being sealedly disposed within a fluid chamber in an immovable manner to seal a flow of fluid flowing from a fluid inlet to a fluid outlet, and an actuator. The relief valve has a fluid passage for controlling a flow rate of the fluid passing from the fluid chamber to the fluid outlet, and a valve stopper sealedly closing the fluid passage for controlling the fluid flowing from the fluid chamber to the fluid outlet, wherein the valve stopper is driven to move between a closed position that the valve stopper is sealedly retained to close the fluid passage for blocking said fluid passing to the fluid outlet, and an opened position that the valve stopper is moved to unseal the fluid passage for allowing the fluid passing to the fluid outlet through the fluid passage.

Abstract: An automate fluid flow control system includes a valve member for being sealedly disposed within a fluid chamber to seal a flow of fluid flowing from a fluid inlet to a fluid outlet, a relief valve having a fluid passage extended along the valve member for communicating the fluid chamber with the fluid outlet and including a valve stopper sitting on a top opening of the fluid passage to sealedly close the fluid passage, and a powering assembly including an actuator to move the relief valve between a closed position that the valve stopper is sealedly retained to close the fluid passage and an opened position that the actuator drives the valve stopper to unseal the fluid passage for releasing a pressure within the fluid chamber to allow the fluid passing to the fluid outlet.

Abstract: A valve includes a body, a cage, a plug, a stem, a stop ring, and a pilot plug. The cage includes at least one cage port there through allowing fluid communication between the fluid inlet and the fluid outlet. The plug is movable linearly within the cage to allow fluid communication between the fluid inlet and the fluid outlet when the valve is open. The pilot plug is adapted to transfer downward force from the stem to the plug by contacting the stop ring of the plug and thereby urging the plug downward through the cage when the stem moves linearly downward to adjust the valve from the closed position to the open position. In an alternative embodiment, the stem includes a collar adapted to contact the plug and adjust the valve from the closed position to an open position.

Abstract: A bypass valve for internal combustion engines for connecting the pressure side to the intake side of a supercharging device. The bypass valve includes an electromagnetic actuator and a valve housing in which a closing component is movably accommodated. The closing component has a valve body, acted upon by pressure and movable in a flow channel, and a switchable sealing element.

Abstract: A handle assembly for providing dual flush functionality to a flush valve. The handle assembly comprising a handle and a plunger engagable with each other. The plunger axially slidable in a bush disposed between the handle and the flush valve. The bushing having a passage for receiving the plunger. The plunger having a first and a second axis along which the plunger may travel through the passage. Movement of the handle moves the plunger from first axis to the second axis wherein actuation of the flush valve by the plunger along the first axis results in a different flush volume than actuation along the second axis.

Abstract: A valve apparatus for controlling fluid flow between a fluid passage and a fluid delivery conduit therein includes a valve housing having first and second housing ports spaced therealong, and a driven member driveable toward and away from the first housing port. A closure member having a port is coupled to the driven member and slidable therealong. The driven member and closure member close and open the closure member port during movement of the driven member toward and away from the first port to induce and relieve a pressure differential, exerted on the closure member by fluid entering the housing, acting to slide the closure member along the driven member to close the first housing port. An inductive coil extends about an open end of the housing to receive a coil-equipped end of a probe therein to communicate the probe with monitoring and control systems across the valve.

Abstract: A control valve includes a main poppet that moves in response to pressure in a primary control chamber and thereby controls the flow of fluid through a valve seat between first and second ports. A passageway extends between the second port and the primary control chamber and includes a variable flow restriction that decreases as the main poppet moves away from the valve seat. An electrohydraulic pilot valve has a pilot poppet which controls fluid flow from the primary control chamber to the first port in response to pressure in a pilot control chamber. A sub-pilot valve selectively releases pressure in the pilot control chamber to operate the pilot poppet to open and close a path between the inlet and the outlet. Using an electrohydraulic pilot valve enables the main poppet to operate quickly in controlling large fluid flow rates. Unidirectional and bidirectional versions of the control valve are described.

Abstract: A dual mode flush valve includes a handle assembly having a handle, a bushing and a plunger. The bushing has a sleeve with a passage therethrough for mounting the plunger for sliding and tilting. The passage is defined by first and second partially overlapping bores that coincide at the inner end of the sleeve and are spaced one above the other at the outer end of the sleeve. The bores define a horizontal plunger travel axis and an angled plunger travel axis. Depending on which direction the user actuates the handle the plunger will travel along one of these axes. Travel along the angled axis will lower the plunger tip, allowing earlier clearance of a relief valve and a reduced flow through the flush valve compared to actuation with the plunger travel along the horizontal axis.

Abstract: Tilting of a main valve assembly under high inlet pressure conditions is prevented by supporting the main valve assembly with housing rib engaging a skirt on the main valve guide tube. Pilot valve opening results from contact of an enlargement on the pilot valve stem with the push rod as the pilot valve begins its upward movement. An off center baffle compensates for the pressure pattern resulting from the side entry inlet. Throttling structure provided by a skirt on the guide tube cooperating with a shoulder in the outlet passage provides a desirable large flush flow. The inlet and handle openings in the valve body include bosses adjacent thereto an internal to the housing.

Abstract: A diaphragm assembly for use in conventional diaphragm-type flush valves includes a flexible diaphragm body having a first side and a second side and a bypass orifice filter insert defined in the diaphragm body. The second side of the diaphragm body includes an annular protrusion and a plurality of protruding ribs, wherein a recess area is defined between the rib and the protrusion. When a pressure difference is applied across the diaphragm body, the second side of the diaphragm body is concave and the first side of the diaphragm body is convex, whereby a distance between the rib and the protrusion decreases in order to prevent the diaphragm body from closing two quickly against a valve seat of a flush valve. A method for controlling pressure differences across the diaphragm body is also disclosed.

Abstract: Tilting of a main valve assembly in unison with the head portion of a pilot valve under high inlet pressure conditions is prevented by supporting the main valve assembly with housing rib engaging a skirt on the main valve guide tube opposed to the handle actuated push rod. A positive, toggle like pilot valve opening results from contact of an enlargement on the pilot valve stem with the push rod as the pilot valve begins its upward movement. An off center baffle in the inlet passage compensates for the non uniform pressure pattern resulting from the side entry inlet. The pilot valve head includes an easily replaceable cup shaped seal having a reentrant rim engaging the pilot valve surface in the main valve member and having an upper central portion engaging an abutment with a valve rotator configuration is the full open position. A secondary throttling structure provided by a skirt on the guide tube cooperating with a shoulder in the outlet passage provides a desirable large flush flow for siphon fixtures.

Abstract: A filler spout comprising a tubular body having a transverse partition pierced by an opening forming a valve seat which is associated with a main valve member that is connected to a piston extending in a pilot cavity connected to an exhaust orifice and to a pilot duct having a pilot orifice provided with a controlled pilot valve member, the pilot duct opening out to a face of the piston that causes the main valve member to move towards an open position when the pilot duct is fed with a liquid under pressure.

Abstract: A pilot operated valve has a main poppet that selectively controls flow of fluid between first and second ports in response to pressure in a control chamber on one side of the main poppet. The main poppet has an aperture extending between the control chamber and the first port. A pilot piston slides within the aperture and has the pilot passage with a pilot orifice and a first disk spring biases the pilot piston with respect to the main poppet. A pilot valve element selectively engages the pilot orifice to open and close the pilot passage and thereby controls motion of the main poppet. Forces from the first disk spring and a pressure differential between control and pilot chambers alter a position of the pilot valve seat with respect to the main poppet. The change in position compensates for effects on valve operation due to variation of the pressure at the two ports.

Abstract: A switching valve assembly 32 for use in a mixing faucet is disclosed. The switching valve assembly comprises a switching valve assembly 32 for use in a mixing faucet, which comprises a manual operation member 36 adapted to be moved in response to a pressing operation by a user, a push rod 35 having a base end joined to the manual operation member, a pilot valve 40 disposed relative to a distal end of the push rod, a coil spring 42 interposed between the pilot valve and the distal end of the push rod, a diaphragm main valve 46 having a pilot-valve port designed such that the pilot valve is selectively brought into contact therewith and separated therefrom, a pressure chamber 48 formed on the side of a back surface of the main valve to contain a part of the push rod, the pilot valve and the coil spring, and a valve seat 52 designed such that a front surface of the main valve is selectively seated thereon and unseated therefrom.

Abstract: An improved relief valve for use in a diaphragm flush valve is constructed having a sealing member provided with an exteriorly threaded shaft extending down into the diaphragm flush valve with a smaller diameter metal stem extending from the bottom of the shaft, a sleeve member slidable along the metal stem and having a vertically aligned slit in its side wall, and a retaining member adjustably vertically positioned on the threaded sealing member shaft, wherein the retaining member having a stop element extendable into the vertical slit to prevent the sleeve member from dropping further than a predetermined distance from the bottom of the threaded shaft.

Abstract: An electromagnetic shuttle valve with two valve passages (5, 6) provides an increased cross-section of the second valve passage (6) by increasing the diameter of the second valve closure member (8). To this end, a compression spring (17) which biases the second valve closure member towards the first valve closure member (7) is arranged inside the second valve closure member (8) and the second valve seat (27). It abuts a radial projection formed on the housing sleeve (1) below the second valve seat (27). In order to provide an even larger cross-section of the second valve passage (6), the housing sleeve diameter can increase around the second valve seat (27). In this case, the housing sleeve can include a bulged collar 9 to provide a stop for axial movement during assembly.

Abstract: A valve assembly having a valve body, a piston, a modulating plug, a valve cover adjoining the valve body, and a throttling member. The valve body has an inlet and outlet port, a partition with a valve seat separating the valve body into a first and second flow passage. The piston has a throughbore including an orifice, reciprocably mounted in the valve body and movable between a first and second position. The modulating plug, in abutting contact with the piston and reciprocably mounted in the valve body, gradually moves between an open position, permitting a main fluid flow, and a closed position engaging the valve seat, blocking the main fluid flow. The throttling member is adapted to insure a gradual alteration of the cross-section of the orifice upon piston movement. A method of gradually opening the valve assembly modulating plug is also set forth.

Abstract: The device comprises: a solenoid valve of the bistable type controlled by means of an operating winding; a control circuit coupled for operation to a power supply source and capable of supplying to the operating winding of the solenoid valve a first and a second current pulse, for opening and closing the solenoid valve respectively; and a detecting and operating device associated with the said solenoid valve, capable of detecting a predetermined dangerous operating condition thereof, and of causing, in such a case, the automatic reclosing of the valve for cutting off the flow of the fluid.