Abstract: A valve can include a solenoid coil, a plunger having a core configured to respond to a magnetic field generated by the solenoid coil, and a valve disc. The valve disc can be positioned at a head of the core and configured to cushion impact when the valve is closed. A projection can be positioned and configured to cushion impact when the valve is opened. The valve can be used in an air bed system in fluid connection between an air pump and an inflatable air chamber of a mattress.

Abstract: A two-handle automatic faucet includes a faucet body, a solenoid valve core, a controller, and a sensor. The solenoid valve core, the controller and the sensor are mounted to the faucet body. The controller is electrically connected to the solenoid valve core and the sensor. The controller controls action of the solenoid valve core according to a sensor signal of the sensor, so as to correspondingly control water flow of the two-handle automatic faucet. The controller and the solenoid valve core are installed to the faucet body, thus, it is convenient for a user to install the finished product of the two-handle automatic faucet.

Abstract: A flush valve includes a valve housing defining a fluid passageway between a fluid inlet and a fluid outlet. The fluid passageway includes a diaphragm valve seat disposed between the fluid inlet and the fluid outlet. The flush valve additionally includes a diaphragm assembly including a diaphragm and a disc. The diaphragm includes a primary opening and a bypass opening. The primary opening receives the disc therein and the bypass opening allowing water under pressure supplied to the fluid inlet to pass from a fluid inlet side of the diaphragm into a chamber in the fluid passageway. The flush valve additionally includes a relief valve configured to selectively control fluid flow from the chamber to the fluid outlet. The relief valve comprises a stationary valve element and a rotatable valve element each having at least one opening and being rotationally positionable relative to one another to regulate fluid flow.

Abstract: A thermostatic automatic faucet includes a faucet body, a solenoid valve, a human body sensor unit, and a water mixing valve. The water mixing valve is installed in the faucet body. An inlet end of the solenoid valve is in communication with a water mixing outlet of the water mixing valve. An outlet end of the solenoid valve is in communication with a nozzle of the faucet body. The human body sensor unit controls the solenoid valve to be opened and closed. The faucet is controlled to spray water or not by a sensor, and the water temperature can be adjusted. The safety and durability of the product are improved.

Abstract: A lubrication device (1) for applying a lubricant when rolling a rolling material. The lubrication device (1) includes an extruded profile (3), through which run lubricant ducts (41) and at least one carrier medium duct (42), at least one connection block (5, 6) and nozzles (7). The connection block (5, 6) is connected to the extruded profile (3) and has lubricant connection ducts (54) that are each connected to one lubricant duct (41) of the extruded profile (3). The nozzles (7) are connected to the extruded profile (3) and are designed to create and emit a lubricant-carrier medium mixture consisting of lubricant and a carrier medium.

Abstract: An assembly for use with a water meter includes: a housing including a meter portion integrally formed with a valve portion; and a valve positioned in the valve portion and in sealable communication with an inner surface of the housing, the valve defining a valve inlet portion and a valve outlet portion, the valve inlet portion defining a vertical portion and separated from the valve outlet portion by a top edge portion defined in the vertical portion, the valve inlet portion sealable from the valve outlet portion by a diaphragm assembly of the valve, the diaphragm assembly defining a water leak passthrough configured to allow passage of water from a first side of the diaphragm assembly to a second side of the diaphragm assembly opposite from the first side.

Abstract: A fluid-actuated rotary actuator includes a housing having a tubular body extending in an axial direction, in which is provided a drive piston assembly for driving a rotatably mounted output shaft, which extends perpendicular to the axial direction through the tubular body and the axial end of which is routed out of the tubular body at an upper wall section of the tubular body, further including a magnet assembly associated with the axial end of the output shaft and receiving a rotary movement of the output shaft, and further including a position feedback device configured to detect the magnetic field generated by the magnet assembly and to provide, in accordance with the detected magnetic field, a position signal corresponding to a position of the output shaft, wherein the position feedback device is located in a receptacle chamber formed in the upper wall section of the tubular body.

Abstract: A variable orifice flow device controls the flow of a fluid between a volute casing and a compressor motor casing in a compressor. The variable orifice flow device may be a shuttling valve, with positions controlled by, for example, valves controlling the flow of the fluid into a space opposite a side within the shuttling valve assembly. The variable orifice flow device may have one or more orifices through which a fluid can enter the compressor motor casing, and the surface area of the orifices may be controlled by the position of the shuttling valve.

Abstract: An apparatus is described for controlling a flow of a fluid therethrough while the apparatus is connected to a source of control fluid. The apparatus includes an input, a valve seat, a diaphragm, an output, and a diaphragm control space. The diaphragm control space is partially defined by the diaphragm, and includes a control fluid inlet and a control fluid outlet. The apparatus is operative to independently control a flow of control fluid into the diaphragm control space through the control fluid inlet and a flow of control fluid out of the diaphragm control space through the control fluid outlet. A deflection of the diaphragm in relation to the valve seat is responsive to a pressure of the control fluid in the diaphragm control space. The deflection of the diaphragm in relation to the valve seat is operative to control a fluidic flow resistance between the input and the output.

Abstract: A solenoid valve includes a valve seat provided in a main flow passage, a main valve body configured to open or close the main flow passage, a pilot passage that branches from the main flow passage, an orifice provided in the pilot passage, a back-pressure chamber connected to the pilot passage downstream from the orifice to bias the main valve body to a closing direction by virtue of an internal pressure, a pilot valve disposed in the pilot passage downstream from a connection point to the back-pressure chamber to control an internal pressure of the back-pressure chamber, a solenoid configured to control a valve opening pressure of the pilot valve, and a second orifice provided between the back-pressure chamber and the pilot valve.

Abstract: A hydraulic drive system includes an oil supply device, an oil return device and a hydraulic cylinder circuit component. The circuit component includes a hydraulic cylinder, a first and a second two-position two-way electromagnetic directional valves. The cylinder includes a first chamber and a second chamber that has a piston rod. A first port of the first valve connects with the first chamber and a first port of the second valve connects with the second chamber. When the oil supply device connects to a second port of the first valve and a second port of the second valve connects to the oil return device, the piston rod is extended outwards. When the oil supply device connects to the second port of the second valve and the second port of the first valve connects to the oil return device, the piston rod is retracted.

Abstract: A pilot type solenoid valve includes a pilot valve unit and a passage block unit. The passage block unit has a rectangular parallelepiped shape including a pair of wide opposite surfaces, and four side surfaces surrounding the wide opposite surfaces. The four side surfaces include a first surface on which the pilot valve unit is attached, and a second surface formed with at least either an input port or an output port. A valve element is a diaphragm valve and arranged in parallel to the pair of wide opposite surfaces. The passage block unit includes a block body forming a valve chamber around a valve seat, and a flat cover. The flat cover includes a recess forming the back chamber of the diaphragm valve, and the flat cover has a flat cover communication path formed to provide communication between the recess and a common path of the pilot valve unit.

Abstract: A flush valve system is provided having an inlet and an outlet, and a main valve element adapted for transition between a closed position and an open position is disclosed. The flush valve further includes a control chamber in communication with the inlet, and a vent outlet in communication with the outlet. The system includes a solenoid for establishing communication between the control chamber and the vent outlet to establish a pressure differential across a portion of the main valve element. The system also includes a power supply for energizing the solenoid, a deployable actuator in communication with the power supply, and a microprocessor in electrical communication with the main valve element. The microprocessor is adapted to determine a valve opening time, calculate fluid pressure based on the valve opening time, and deliver a predetermined quantity of fluid through the valve based on fluid pressure.

Abstract: A composite valve has a communication path, a second valve port and a pilot passage. First and second valve bodies are arranged to be moved up and down in the same direction, and are away from each other only at a predetermined distance. In the case that a lift amount of the second valve body for a small flow rate control is equal to or less than a predetermined amount, said pilot passage and a first valve port are respectively closed by a pilot valve body and the first valve body, thereby taking a small flow rate control state. In the case that the lift amount of said second valve body goes beyond said predetermined amount, said pilot valve body is moved up by the upward movement of a valve shaft to open said pilot passage, thereby taking a large flow rate control state.

Abstract: A micro-power generator is integrated in a pneumatic valve controller, such that the micro-power generator is powered by the same compressed air supply used to operate the valve. The micro-power generator includes a micro-turbine connected to a DC power generator, and a source of compressed air is used to drive the micro-turbine to generate power via the generator. The system may include a valve controller pneumatically connected to the compressed air supply. The valve controller may include electronics for displaying a condition of the controller. The system can include an electronic field device in communication with the valve controller for displaying a condition of the valve controller. The micro-turbine generator can be electrically connected to the field device to provide power to the electronic field device. Other embodiments are disclosed and claimed.

Abstract: A restrictor mechanism is provided in a pilot operated solenoid valve that restricts the pilot flow to the actuating piston of the valve if the pressure differences within the valve are great. This reduces the actuating forces allowing the valve to open or close softly. As the pressures within the valve start to balance, the restrictor device opens, allowing full pilot flow to hold the valve in position.

Abstract: A valve system has a main body including a valve element that controls flow of fluid between a plurality of ports and an operation unit capable of being detachably attached to the main body. The main body includes; a driving element that is operated from the outside by a magnetic force and directly or indirectly drives the valve element; and a first housing that houses the valve element and the driving element and is watertight in a state where pipes are connected to the plurality of ports. The operation unit includes: an operation element that generates a magnetic field that operates the driving element; and a second housing that houses the operation element, when attached to the first housing, the operation element and the driving element being in a facing state via part of a wall of the first housing and part of a wall of the second housing.

Abstract: A variable flow rate valve system adjusts flow rate using the flow medium itself by creating differential pressures that determine a position of a valve member in relation to an associated valve seat. The valve system includes a diaphragm that divides a valve chamber into a control chamber and a flow chamber connected with an inlet. A valve body is connected with the diaphragm and cooperates with a valve seat to modulate flow from the inlet to an outlet and through the flow chamber. A first pilot valve in a first bypass extends between the outlet and the control chamber, and a second pilot valve in a second bypass extends between the inlet and the control chamber. The valves are controlled to selectively open or close respective bypasses to vary the flow through the flow chamber between a fully open and a fully closed condition in response to a control signal.

Abstract: A check valve comprising a valve housing, which comprises an inlet, an outlet, and a valve channel. The valve channel connects the inlet to the outlet and has a valve seat. The check valve further comprises a closure part, which cooperates with the valve seat, and a tappet bearing the closure part. An end of the tappet which is remote from the closure part bears a control piston, which together with a cylinder wall defines a control chamber, which is connected a control connection. The control chamber is connected to the valve channel by means of a connection channel.

Abstract: A stepper-motor gas valve control is disclosed that includes a main diaphragm in a chamber that controllably displaces a valve relative to an opening in response to changes in pressure, to adjust fuel flow through the valve. A servo-regulator diaphragm is provided to regulate flow to the main diaphragm, to thereby control the rate of fuel flow. A stepper motor is configured to move in a stepwise manner to displace the servo-regulator diaphragm, to control fluid flow to the main diaphragm. A controller mounted on the stepper-motor regulated gas valve control receives and converts an input control signal from a heating system to a reference value between 0 and 5 volts, and selects a corresponding motor step value. The control responsively moves the stepper-motor in a step wise manner to displace the servo-regulator diaphragm and thereby regulates the rate of fuel flow through the valve.

Abstract: A pinch-type isolation valve (10) is provided having an integrated, on-board reservoir (42) for storing a pressurized fluid capable of effecting the collapse of an internal sleeve (32) upon actuation of the valve. Valve (10) comprises an outer wall 16 and an inner wall (30) which define the pressurized gas reservoir (42). An actuator assembly (14) is provided to cause and direct a flow of pressurized gas from the reservoir (42) into a gas-receiving chamber (39) defined between the inner wall (30) and sleeve (32).

Abstract: The thruster pod that is made of a pump plate; a valve plate affixed to the pump plate, and a diaphragm mounted between the pump plate and the valve plate. The pump plate has juxtaposed pressure cavity and outlet cavity, and a partition separating the pressure cavity from the outlet cavity. The pressure cavity communicates with a source of water under pressure and the outlet cavity communicates with an outlet port. The valve plate has a control chamber facing the juxtaposed pressure and outlet cavities. The diaphragm is mounted between the juxtaposed pressure and outlet cavities and the control chamber for movement between a first position and a second position upon a change in pressure in the control chamber. A control valve is mounted in the valve plate for selectively changing a pressure in the control chamber and operating a diaphragm valve.

Abstract: A flush valve for a waste water system comprises a valve including a fluid inlet, a fluid outlet and a main valve element adapted for movement to allow fluid flow between the fluid inlet and the fluid outlet based on a pressure differential across a portion of the main valve element. The valve also includes a vent system comprising a control chamber in flow communication with the fluid inlet of the valve and a vent outlet in flow communication with the fluid outlet of the valve, and a solenoid for venting fluid venting fluid from the control chamber to the fluid outlet. A pressure sensor, such as an electronic pressure transducer, senses the fluid pressure of fluid within the vent system. When a predetermined pressure threshold is reached or exceeded, the solenoid can be energized to release fluid from the control chamber.

Abstract: A positioner operating mode identifying function is provided in a calculating unit. A pressure value of an amplified pneumatic pressure signal, from a single-mode pilot relay, is detected by a pressure sensor and sent to the calculating unit. The calculating unit, through the positioner operating mode identifying function, monitors a change in the amplified pneumatic pressure signal corresponding to a change in the control signal, and if the direction of change in the control output and the direction of change of the amplified pneumatic pressure signal are the identical direction, identifies the operating mode of the positioner as the positive operating mode. The operating mode of the positioner is identified as the negative operating mode if the direction of change in the control output and the direction of change of the amplified pneumatic pressure signal are the opposite directions. The identification results displayed on a screen of a display unit.

Abstract: The invention relates to a valve comprising a valve housing having a valve inlet and outlet, a valve seat arranged in the direction of flow of the fluid between the valve inlet and outlet, a closure means which is movably arranged in the valve housing, and has a first side and a second side, wherein the closure means closes off the valve seat tightly when the valve is in the closed state, a balancing opening for producing a pressure compensation between the first side and the second side of the closure means, and at least one control actuator, wherein the control actuator closes off the balancing opening of the closure means in a closed position and frees the balancing opening of the closure means in an open position so that the closure means frees the valve seat as a result of a pressure compensation via the balancing opening.

Abstract: An improved microvalve is described. The microvalve includes a corresponding actuation aperture in an actuation aperture layer. A control fluid flows through the actuation aperture. The flow of the control fluid is controlled by an electric field typically applied via a charge distribution near an actuation aperture layer. In one embodiment, the electric field may adjust the opening and closing of the actuation aperture thereby controlling the flow of the control fluid. In a second embodiment, the control fluid is an electrorheological fluid where the electric field controls the viscosity of the ER fluid thereby controlling fluid flow through the actuation aperture. In both embodiments the flow of the control fluid controls stretching of a flexible membrane formed along the wall of a conduit through which a fluid to be controlled flows. The stretching of the flexible membrane controlling the flow of the main fluid to be controlled.

Abstract: A magnetic control valve is to block an outlet end of a water inflow passage and an inlet end of a water outflow passage of a connection pipe by using a rubber ring. A valve of the rubber ring is opened or closed by a magnetic control switch. The magnetic control switch mainly takes a valve rod carrying permanent magnetic force that completely controls direction of electromagnetic pole as a power source for moving. When a valve plug at an end of the valve rod seals the valve, a metal plate capable of being sucked by magnetic force is combined with the rubber ring to allow both to generate magnetic sucking effect, thereby firmly closing.

Abstract: An adjustable damping valve device, for a vibration damper, includes a first valve and emergency operation valve, both of which are actuated by a shared solenoid. The emergency operation valve carries out a relative movement relative to the first valve when passing from the emergency operation position into normal operation. A magnetic flux guiding element is arranged in the magnetic flux between the first valve and the emergency operation valve and determines the magnetic flux for the emergency operation valve and for the first valve.

Abstract: An image forming apparatus is disclosed that includes the pressure adjusting valve including a movable member movably disposed in the pressure adjusting valve, a first throttling part; and a second throttling part, wherein the second throttling part is formed as a gap between an internal wall of the frame of the pressure adjusting valve and the movable member, an internal fluid resistance of the pressure adjusting valve varies in response to the flow rate of the liquid, and when the liquid is discharged from the nozzle, the liquid is fed from the liquid tank to the recording head by the liquid feeding unit in a state where the recording head is in fluid communication with the liquid tank via the pressure adjusting valve.

Abstract: An operating mode of an electro-pneumatic converting unit is stored in advance in an electro-pneumatic converting unit operating mode storing unit. A blockage location identifying function is provided in a calculating unit. The operating unit monitors the magnitude of shift and the direction of shift of the control output, relative to the nozzle back pressure, through the blockage location identifying function, and identifies whether a blockage has occurred in the fixed orifice or the nozzle/flapper mechanism based on the magnitude of shift and direction of shift of the control output, relative to the nozzle back pressure, and based on the operating mode of the electro-pneumatic converting unit, stored in the electro-pneumatic converting unit operating mode storing unit.

Abstract: A solenoid operated pilot valve utilizes an offset pilot opening and a lever arm to provide a mechanical advantage to multiply the opening force of the solenoid, thereby allowing the solenoid size to be reduced. The lever arm used to position the pilot valving member is mechanically positioned via a solenoid driven plunger in one embodiment, and is positioned by magnetic force alone in an alternative, plungerless embodiment. The lever arm pivots via a fixed fulcrum point, a profiled fulcrum providing continuously variable mechanical advantage, or a stepped fulcrum providing discreet different mechanical advantages as the pilot valving member is moved from its fully closed to its fully opened position.

Abstract: The present invention provides an air discharge implement for a portable pressurized sprayer comprising a cylindrical main body of discharging duct, an external hood jacket, a conical moving plug and a compression spring. Wherein the main body of hollow discharging duct includes a cylinder bore, a cylindrical discharging mount for containing conical moving plug, and an air passage interposed between hollow discharge chamber and cylinder bore. The external hood jacket is a hollow holder to contain compression spring. The conical moving plug includes a top cone and a planar base with plural footing legs so that a water flow gap is created between the planar base and the air passage at the cylinder bore. If the present invention is properly connected to a water outtake hose of a portable pressurized sprayer, either no air or certain air mingled in the compressed water, it can achieve the air-discharging effect completely.

Abstract: A stepper-motor gas valve control is disclosed that includes a main diaphragm in a chamber that controllably displaces a valve relative to an opening in response to changes in pressure, to adjust fuel flow through the valve. A servo-regulator diaphragm is provided to regulate flow to the main diaphragm, to thereby control the rate of fuel flow. A stepper motor is configured to move in a stepwise manner to displace the servo-regulator diaphragm, to control fluid flow to the main diaphragm. A controller mounted on the stepper-motor regulated gas valve control receives and converts an input control signal from a heating system to a reference value between 0 and 5 volts, and selects a corresponding motor step value. The control responsively moves the stepper-motor in a step wise manner to displace the servo-regulator diaphragm and thereby regulates the rate of fuel flow through the valve.

Abstract: A blow-off valve for a turbo blower 1000 has a body part 100 which includes a cylinder part 110, a valve-guide plate 130 on the cylinder part 110 and a head part 150 covering the valve-guide plate 130. In the cylinder part 110, a blow-connection opening 1038 connected with a blow opening 2500 of the turbo blower 2000 and a blow-off opening 1058 to blow off the emission air from the turbo blower 2000. A spool valve 300 is provided and a blow-pressure spool 380 is located at space connected with the blow-connection opening 1038 and a blow-pressure opposing spool 330 is located between the valve-guide plate 130 and the head part 150 and a stem of the spool valve penetrates the valve-guide plate 130 and is supported thereby. A three-way solenoid valve 20 is mounted on the head part 150.

Abstract: An image forming apparatus includes a recording head, a liquid tank, a first fluid flow path supplying liquid to the recording head, a second fluid flow path being in communication with the liquid tank, a pressure adjusting valve allowing fluid communication between the first and the second fluid flow paths, a cap member covering a nozzle surface of the recording head, and a suction unit being in communication with the cap member. The pressure adjusting valve includes a movable member movably disposed in the internal fluid flow path, wherein the movable member includes a sealing unit that seals the communication between the first and the second fluid flow paths when the cap member covers the nozzle surface of the recording head and a negative pressure is generated in a cap-member space formed between the cap member and the nozzle surface by driving the suction unit.

Abstract: An evacuation valve for a metering device for a liquid medium is disclosed. The valve includes a seal holder having a chamber formed therein and a seal. An elastomeric material fills the chamber to form the seal. The seal includes a smooth, flat sealing surface located above the seal holder. The inclusion of a lip in the chamber retains the seal; a non-circular lip prevents rotation of the seal.

Abstract: A gas thruster is configured to supply thrust over a relatively wide range, from a relatively low value to a relatively high thrust value, and exhibits relatively fine minimum impulse bit (MIB) performance. The gas thruster includes a thrust nozzle, a main stage, a main valve element, and a pilot valve. The gas thruster responds to thruster control signals supplied to the pilot valve and is configured such that for commands of relatively short duration, only the pilot valve responds and relatively low thrust is produced. Conversely, for command or relatively longer duration, the pilot valve and main valve element both respond and relatively higher thrust is produced.

Abstract: A dual position pilot operated valve assembly having a main piston, with a valve member, reciprocable within a valve body, wherein the valve body is adapted for sealingly mating with a valve seat and passage located intermediate the valve body inlet and outlet ports, the valve body having a cylindrical adapter secured to an open end thereof and housing a secondary piston, reciprocable therein, with an axial stem depending from the second piston bottom surface and extending through the adaptor to the first piston cavity for intermittent contact therewith; and an end cap secured to and closing the adapter and having an inlet port interconnected with a source of high pressure control gas and respective first and second conduits leading to the main and secondary piston bore cavities, with an adjustment mechanism controlling the degree of opening/closing of the valve assembly. Several methods of operation are also set forth.

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 flush valve for a waste water system comprises a valve including a fluid inlet, a fluid outlet and a main valve element adapted for movement to allow fluid flow between the fluid inlet and the fluid outlet based on a pressure differential across a portion of the main valve element. The valve also includes a vent system comprising a control chamber in flow communication with the fluid inlet of the valve and a vent outlet in flow communication with the fluid outlet of the valve, and a solenoid for venting fluid venting fluid from the control chamber to the fluid outlet. A pressure sensor, such as an electronic pressure transducer, senses the fluid pressure of fluid within the vent system. When a predetermined pressure threshold is reached or exceeded, the solenoid can be energized to release fluid from the control chamber.

Abstract: A dual position pilot operated valve assembly having a main piston, with a valve member, reciprocable within a valve body, wherein the valve body is adapted for sealingly mating with a valve seat and passage located intermediate the valve body inlet and outlet ports, the valve body having a cylindrical adapter secured to an open end thereof and housing a secondary piston, reciprocable therein, with an axial stem depending from the second piston bottom surface and extending through the adaptor to the first piston cavity for intermittent contact therewith; and an end cap secured to and closing the adapter and having an inlet port interconnected with a source of high pressure control gas and respective first and second conduits leading to the main and secondary piston bore cavities, with an adjustment mechanism controlling the degree of opening/closing of the valve assembly. Several methods of operation are also set forth.

Abstract: A master valve and at least one slave valve are connected via a network, wherein upon broadcast of a position setpoint of the master valve the at least one slave valve achieves a corresponding position within a shortened period of time, such network being a dedicated network or high speed shared network with position setpoint priority.

Abstract: A valve includes a valve body and a free floating poppet. The valve body includes an inlet, an outlet, and a fluid flow passage therebetween. The free floating poppet is disposed in the valve body, and is moveable between at least a closed position, in which the free floating poppet at least substantially restricts fluid from flowing through the fluid flow passage, and an open position, in which fluid is allowed to flow through the fluid flow passage. The free floating poppet includes a base section and a cutback section. The base section has a first cross sectional area. The cutback section has a second cross sectional area that is less than the first cross sectional area.

Abstract: An air supply system and valve is disclosed which provides a reverse pulse of air for cleaning a filter element located in a filter house. A valve is also disclosed for use in the air supply system. The system includes a pressure vessel adapted to contain a volume of compressed air to be used for supplying the reverse pulse, the pressure vessel having a wall with at least one outlet aperture therein. The valve is mounted to the wall around the aperture to control the flow of air from the pressure vessel, the valve means comprising a valve body having an inlet, an outlet and a flow passage connecting the inlet and outlet, the inlet, the outlet and the flow passage generally extending axially through the valve body, a valve seat surrounding the flow passage, and a valve closure member movable towards and away from the valve seat into closed and open positions to thereby close or open the flow passage, and operating means for moving the valve closure member between the closed and open positions.

Abstract: A sliding seal arrangement in particular for a valve having an anodised aluminium coating in contact with the seal. The coating is produced so that inclusions in the surface of the coating are substantially aligned. The direction of motion of the sliding seal in use is then substantially aligned with the direction of the inclusions resulting in greatly reduced wear on the seal.

Abstract: A high temperature valve for controlling gas flow includes an outer vessel, a valve housing, and a valve element. The valve housing is disposed at least partially within, and is at least partially surrounded by, a propellant gas flow passageway that is formed in the outer vessel, and the valve element is disposed within the valve housing. Because the gas flow passageway at least partially surrounds the valve housing, when gas is supplied to the gas flow passageway a compressive force, rather than a tensile force, is exerted on the valve housings.

Abstract: A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the outlet. The valve assembly includes a valve member movable with respect to a valve seat providing a sealing action based on applied pressure on the valve assembly. The bathroom flusher also includes an external cover designed for enclosing an electronic control module comprising a battery, a sensor, and an actuator for controlling operation of the flush valve, wherein the external cover includes at least two cover parts separately removable, and wherein the external cover is attachable with respect to the valve body in a manner also allowing removable attachment of the control module.

Abstract: Methods and devices for shutting off flow in fluid lines by an automated remote sensor signal, when leakage is detected, are disclosed. A shutoff valve has an inlet for connection to the upstream end of the pressurized fluid line, an outlet for connection to the downstream end of the pressurized fluid line, and a springless actuator for driving a valve between open and closed positions. A normally closed solenoid valve is connected between the upstream end of the pressurized fluid line and the springless actuator. A two-position fluid reset switch is also connected to the springless actuator. The shutoff valve further comprises a region of reduced pressure downstream of the actuator but prior to the outlet for connection to the downstream end of the pressurized fluid line. The region of reduced pressure is connected through the fluid reset switch to the springless actuator.

Abstract: A speed governor for a pneumatic rotation motor having a pressure air inlet passage (15, 15?), an inlet valve (16; 56) including a flow controlling valve element (18; 58) located in the inlet passage (15, 15?), and a speed responsive activating device (24; 54) operatively connected to the inlet valve (16; 56), wherein the activating device (24, 54) comprises a pilot circuit with an activating surface (20; 70) on the valve element (18; 58), a restricted air supply opening (21, 72) communicating with the activating surface (20; 70), a bleed-off valve (24; 54) which communicates with the activating surface (20; 70) and which comprises an electromagnet actuator (27; 76), and a generator (30) driven by the motor and delivering to the actuator (27; 76) a voltage of a magnitude responsive to the actual motor speed to thereby make the bleed-off valve (24; 54) operate in response to the output voltage of the generator (30) and the actual motor speed.

Abstract: A two-stage valve for controlling the flow of fluid from a pressurized fluid supply with an upper main body including a cavity with a contoured inner surface; a lower main body with at least one flow exhaust passage forming a primary flow path through the two-stage valve; a pre-stressed diaphragm sandwiched between the upper and lower main bodies, and pressure control capability for controlling the pressure in the cavity. A first valve opens and closes the flow of gas from the pressurized gas supply to the cavity. A second valve allows the pressure in the cavity to exhaust to the environment. Raising and lowering of the pressure in the cavity causes the pre-stressed diaphragm to open and close the flow of gas from the pressurized gas supply through the primary flow path of the two-stage valve. The design is suitable as a microvalve using Micro-Electro-Mechanical Systems (MEMS) concepts.