Abstract: A gas delivery system includes a 2-port valve including a first valve located between a first port and a second port. A 4-port valve includes a first node connected to a first port and a second port. A bypass path is located between the third port and the fourth port. A second node is located along the bypass path. A second valve is located between the first node and the second node. A manifold block defines gas flow channels configured to connect the first port of the 4-port valve to a first inlet, configured to connect the second port of the 4-port valve to the first port of the 2-port valve, the third port of the 4-port valve to a second inlet, the second port of the 2-port valve to a first outlet, and the fourth port of the 4-port valve to a second outlet.

Abstract: A device for regulating a throughflow and distributing a fluid in a fluid circuit, in particular a refrigerant. The device has a housing with ports for connecting to fluid lines which are connected to at least one inner volume of the housing designed as a valve chamber via a respective through opening, and at least one valve element arranged in the valve chamber with a drive element for moving the valve element relative to the housing. The at least one valve element is mounted such that it can be displaced in a linear manner in the axial direction along a longitudinal axis such that a passage for the fluid is opened between a first port designed as an inlet and a second port designed as a first outlet and/or a third port designed as a second outlet.

Abstract: A spool valve includes a sleeve with multiple axial ports positioned over the length of the sleeve and an adjustable spool component that couples neighboring ones of the sleeve's ports based on a position of the spool component within the sleeve. The adjustable spool component includes multiple sub-components having positions that are adjustable relative to each other such that the dimensions of the spool component can be tailored to precisely match the corresponding sleeve.

Abstract: An automatic venturi vacuum regulator includes a housing having a pressure inlet port and a vacuum outlet port; a venturi vacuum pump within the housing, the venturi vacuum pump configured to receive compressed air from the pressure inlet port in order to generate suction at the vacuum outlet port; a movable piston configured to seal the pressure inlet port from the venturi vacuum pump responsive to a sufficient pressure differential between the vacuum outlet port and the pressure inlet port; and a check valve configured to seal the vacuum outlet port from the venturi vacuum pump to resist loss of vacuum at the vacuum outlet port.

Abstract: A reversing valve comprising a valve body having an internal cavity therein and an input port, output port and first and second reversing ports. A baffle is located within the internal cavity and is configured to rotate around a pivot point within the internal cavity. At least one electromagnet is coupled to the valve body. The electromagnet is configured to cause the baffle to rotate in one of the clockwise direction or counter-clock wise direction when a voltage is applied to the electromagnet.

Abstract: A fluid delivery device includes a tube coupled to an axial manipulator. The axial manipulator includes an elongate member arranged to move axially in a housing. The tube is in fluid communication with a fluid diverter which is arranged to move axially in the housing upon axial movement of the elongate member. Seals are provided to prevent fluid from leaking out of the housing. A fluid port is in fluid communication with the tube via the fluid diverter, such that fluid can flow in and out of the tube via the fluid port and the fluid diverter.

Abstract: A valve (1) having a valve housing (2) with at least one supply connection (P), a working connection (A) and an outlet opening (T), as well as a valve piston (3) that is arranged and able to move axially within the valve housing (2). The outlet opening (T) provided in the valve housing (2) has at least first and second control edges (4, 5).

Abstract: A pressure regulation servo-valve comprising a body having a utilization port, a feed port, and a return port, a spool mounted as a sliding fit in the body, the spool co-operating with the body to define a pilot chamber connected to the utilization port. The spool and the body together further define a priming chamber connected to the feed port via a second constriction and connected to the nozzle via a third constriction, and in which there exists a priming pressure acting on the spool in the first direction.

Abstract: A slide valve having a valve slide which can be acted on by an actuator in a first direction, and by an impingement device in a second direction which is opposite the first direction, and which may hydraulically connect a first working connection to an inlet connection or to an outlet connection, and a second working connection to the inlet connection or to the outlet connection, with the aid of control sections. A control section associated with the first working connection has a diameter stage and/or an axially extending groove and/or an axially extending flattened portion, so that when the actuator does not act on the valve slide, the first working connection is hydraulically connected to the outlet connection with the aid of the diameter stage and/or the groove and/or the flattened portion.

Abstract: An air heating, air conditioning and water heating system includes a multi-communicative valve unit, a compressor arranged for compressing the refrigerant in a state of superheated vapor, a condenser communicated with the compressor through the multi-communicative valve unit, a heat exchanger communicated with the condenser through the multi-communicative valve unit, an expansion valve, and a water heater communicated with the heat exchanger and the compressor through the multi-communicative valve unit, wherein the multi-communicative valve unit is arranged to be operated to selectively establish at least an air conditioning route, an air heating route, and a water heating route for the refrigerant so that the air heating, air conditioning and water heating system is capable of selectively providing air conditioning, heating and delivering hot water for a predetermined premises.

Abstract: An air heating, air conditioning and water heating system includes a multi-communicative valve unit, a compressor arranged for compressing the refrigerant in a state of superheated vapor, a condenser communicated with the compressor through the multi-communicative valve unit, a heat exchanger communicated with the condenser through the multi-communicative valve unit, an expansion valve, and a water heater communicated with the heat exchanger and the compressor through the multi-communicative valve unit, wherein the multi-communicative valve unit is arranged to be operated to selectively establish at least an air conditioning route, an air heating route, and a water heating route for the refrigerant so that the air heating, air conditioning and water heating system is capable of selectively providing air conditioning, heating and delivering hot water for a predetermined premises.

Abstract: The present disclosure provides air-tight mechanical valves. In a general embodiment, the valves include a shaft and a segmented sleeve. The shaft includes a plurality of shaft ports distributed around a circumference of the shaft. The sleeve is configured to fit concentrically around the shaft and includes a body having at least two body pieces, at least one internal seal, and at least one set of a plurality of sleeve ports distributed around a circumference of the body. The plurality of sleeve ports cooperates with the plurality of shaft ports to facilitate fluid flow. The valves of the present disclosure advantageously reduce losses of pressure and compressed air during use.

Abstract: An operating device includes: an operating portion provided in a casing so as to be swingable; hydraulic pilot valves and configured to operate by causing the operating portion to swing; and damper portions configured to generate resistance force with respect to a swing operation of the operating portion when the operating portion is caused to swing. Each of the damper portions is configured to generate friction torque in such a manner that a plurality of swing friction plates configured to swing in accordance with the operating portion is pressed by a pressing spring in a direction perpendicular to a swing direction of the operating portion against a plurality of fixed friction plates configured to be prevented from swinging.

Abstract: A double diaphragm pump is provided. The pump includes an inlet manifold, an outlet manifold, an air valve housing, first and second diaphragm housings, and a collar. The inlet manifold has at least one passageway configured to direct fluid from an inlet port on the inlet manifold. The outlet manifold has at least one passageway configured to direct fluid to an outlet port on the outlet manifold. Each of the housings is in selective fluid communication with the inlet and outlet manifolds. The collar is configured to be rotatably attached to the inlet manifold and the pump.

Abstract: A diaphragm sealed, pressure balanced valve assembly includes a valve body and a cartridge connected to the valve body. The cartridge includes a cartridge loading end having a retaining member engaged to the cartridge loading end. A valve member slides coaxial to a longitudinal axis of the valve body. A resilient material first diaphragm is connected to and extends diametrically outward from the valve member having a diaphragm body clasped between the retaining member and the cartridge loading end, creating a first diaphragm fluid pressure boundary. A resilient material second diaphragm is connected to and extends diametrically outward from the valve member at an opposite end of the valve member with respect to the first diaphragm and has a diaphragm body clasped between first and second adjustable retention members, creating a second diaphragm fluid pressure boundary.

Abstract: A filter element for a control valve of a camshaft adjuster. The filter element has an annular filter fabric for extracting particles, and a gripping frame for fastening the annular filter fabric. The gripping frame is designed here for the planar bracing of the annular filter fabric on the control valve. Furthermore, a control valve is disclosed for a camshaft adjuster with a corresponding filter element.

Abstract: A central valve (1) of a camshaft adjuster (9) is provided having a deep drawn housing (2).

Abstract: A valve device is provided for a pneumatic brake system of a commercial vehicle and comprises a pilot piston, radial seals and at least one valve seat, which can be displaced in the direction of motion of the pilot piston.

Abstract: A MEMS fluid control system is provided having a micro-electro-mechanical system. The system includes a plurality of ports, a cavity, a valve, an actuator, and a pair of electrical contacts. The plurality of ports are in communication with the cavity, the valve is disposed in the cavity, and the valve is connected to the actuator. The system further includes a hydraulic circuit having a pressure supply line in communication with a first of the plurality of ports, a control line in communication with a second of the plurality of ports, and an exhaust line in communication with a third of the plurality of ports. The valve includes an elongated portion and a blocking portion, the blocking portion includes a first, a second, and a third portions.

Abstract: A double action directional fluid flow valve includes a stepped piston connected with a poppet valve and moveable by a controller between open and closed positions by applying a continuous pressure to a small diameter piston face and selectively applying and removing pressure from a large diameter piston face to move the poppet valve between an open position and a closed position.

Abstract: A flow path switching valve includes a tube body including one or more inlets opened to communicate with a fluid supplying source and supplying fluid into an inside of the tube body, outlets opened at opposite sides to the respective inlets and selectively alternately discharging fluid from the inside of the tube body, drains opened at opposite ends and discharging operating fluid introduced through the outlet, and seat units respectively protrude on an inner circumference of the tube body between the inlet(s), outlets and drains. An operating rod, coaxially mounted in the tube body, includes spaced apart projection units and is connected to an operating unit at one end so as to reciprocate axially within the tube body responsive to the operating unit. Valve bodies are movably disposed on an outer circumference of the operating rod and are arranged between the respective projection units to face respective seat units.

Abstract: A control valve for controlling pressure medium flows, including: a valve housing having a hollow construction and having at least one feed connection, at least two working connections, and at least one discharge connection; a control piston held displaceably inside the valve housing, through which, dependent on position, the feed connection can be connected via at least one pressure medium line to the one or to the other working connection, while the respectively other working connection is connected via at least one second pressure medium line to the discharge connection. The control piston has a piston cavity and the first pressure medium line includes a feed opening allocated to the feed connection and a discharge opening allocated to the working connections, with each of these openings opening into the piston cavity.

Abstract: A control valve (1) of a device (2) for changing the relative angular position of a camshaft (3) with respect to a crankshaft of an internal combustion engine, wherein, in a region (4) facing the camshaft (3), the control valve (1) includes a fluid line (5) for supplying fluid under pressure and wherein, in an axial central region (6), the control valve (1) includes two fluid lines (7, 8) for supplying and removing fluid under pressure to at least two hydraulic chambers. The hydraulic chambers are operatively arranged between a drive element (9) and the camshaft (3) in order to set a defined relative rotational position between the drive element (9) and the camshaft (3). In a region (10) facing away from the camshaft (3) the control valve (1) has a fluid line (11) for removal of fluid to a tank.

Abstract: A solenoid valve has a linear solenoid, a common cylindrical sleeve, one axial end of which is fixed to the linear solenoid, and a common spool movably accommodated in the sleeve, and a return spring. The solenoid valve further has a first three-way valve formed by a first portion of the sleeve and a first portion of the spool for operating as a normally-closed type valve, and a second three-way valve formed by a second portion of the sleeve and a second portion of the spool for operating as a normally-opened type valve.

Abstract: A relief valve for an oil pump can prevent a main gallery from being damaged by largely decreasing peak pressure of an oil pump by using bypass flow according to oil pressure of the main gallery in cold start of an engine, and can control the discharging pressure of the oil pump at the optimum level when the engine is warmed up, by defining a housing chamber communicating with the main gallery of the engine and a plunger chamber bypassing some of oil flowing to the main gallery to the oil pump or an oil pan in accordance with oil pressure in the housing chamber using a plunger chamber, and by changing a modulus of elasticity of a coil spring elastically supporting the plunger in accordance with the oil pressure produced in the main gallery, by using a substance that is expanded by temperature.

Abstract: An electromagnetic valve comprising casing, a coil and a mobile nucleus, sliding axially across the entire extension of the coil, between two operative positions wherein there is an interface with a powering body and a discharging body. The configuration of the electromagnetic valve guarantees a precise guide of the mobile nucleus free from sticking and enables speed and precision in the assembly of the electromagnetic valve.

Abstract: The valve (100) comprises a valve body (101), a valve seat insert (103) assembled to the valve body (101), and a valve seal member (120) compressively assembled to and sealing to both the valve body (101) and the valve seat insert (103), with the valve seal member (120) including one or more port apertures (202).

Abstract: A relief valve for an oil pump, may include a housing defining a relief space, a plunger slidably disposed in the relief space and dividing the relief space into a housing chamber and a plunger chamber, an elastic member elastically supporting the plunger and being compressed by oil pressure of the main gallery, wherein the oil pressure of the main gallery may be relatively lower than an oil pressure under a warm-up state of the engine, a locator disposed under the plunger and supporting the elastic member, a plug coupled to a lower portion of the housing under the relief space and supporting the locator such that a modulus of elasticity in the elastic member may be changed by a change in seat position of the elastic member, and a negative pressure supplier selectively generating negative vacuum pressure in the locator such that a height of the locator changes.

Abstract: A twin power valve assembly (10) for a hydraulic braking system having a single body (16) with twin power valve arrangements, each having a spool (36, 36?) with a longitudinally extending passageway (36D, 36D?) for providing a modulation of the pressure applied to the brakes, and an integral balance piston (60, 60?) contained within the body (10) that equalizes the pressure applied to the left and right hand brakes when both brakes are applied.

Abstract: A pressure balanced solenoid operated valve includes a solenoid portion having a coil in a coil retainer. A valve member portion defines a body connected to the solenoid portion. A slidable valve member in the body has opposed first and second ends and a shoulder between the ends. The first end with the coil energized is magnetically drawn toward the coil retainer moving the valve member between a valve closed and a valve open position. A pressure equalizing passage extends in the valve member from the second end. An inlet passage communicates a pressurized fluid at a valve inlet port to the pressure equalizing passage. A connecting passage communicates between the pressure equalizing passage and the shoulder. The pressurized fluid in the pressure equalizing passage acts against the second end and equally and oppositely against both the shoulder and the first end in both the open and closed positions.

Abstract: A fluid flow control system includes a fluid inlet, a central chamber, a first nozzle extending from a first side of the central chamber and comprising a first throat, a second nozzle extending from a second side of the central chamber opposite the first side and comprising a second throat, and a flow control shuttle. The flow control shuttle includes a first needle having a first tapered portion positioned within the first throat for controlling flow through the first nozzle and a second needle having a second tapered portion positioned within the second throat for controlling flow through the second nozzle.

Abstract: A hydraulic directional control valve which has a valve housing and a control piston that is arranged therein in a displaceable manner. The valve housing has at least one outflow connection, at least one inflow connection and a working connection. The control piston has a main body and at least one control section. The control section controls a pressure medium flow from the inflow connection to the working connection and/or a pressure medium flow from the working connection to the outflow connection, and the control section is made separately from the main body and is fastened thereon.

Abstract: A hydraulic system with a pressure reducing valve having at an inlet side a tank connection, a system pressure connection, and an outlet side working pressure connection that is connected to the system pressure connection or to the tank connection through the pressure reducing valve. The pressure reducing valve has a first and a second system pressure connection, wherein the second system pressure connection is pressurized at a significantly higher pressure than the first system pressure connection, and is connected to the working pressure connection through the pressure reducing valve.

Abstract: A traction valve is provided for use in combination with a relay valve. The traction valve includes a body configured for connection to a housing of the relay valve and defining inlet, outlet and traction supply ports. A first fluid control valve used for traction control is supported on the body and includes a valve member that alternately permits and prevents fluid communication between the traction supply and outlet ports in the body. The body and the first fluid control valve are configured to receive any of a plurality of interchangeable second fluid control valves between the inlet port in the body and the first fluid control valve. Each of the plurality of interchangeable second fluid control valves is configured to perform a different function such that the traction valve assumes different configurations upon assembly of the various second fluid control valves with the body and the first fluid control valve.

Abstract: A fluid supply system is provided, especially for delivering liquid hydrocarbon to a fuel-operated vehicle heater or to a reformer. The system includes a fluid reservoir (12), a first fluid line (28) from the fluid reservoir (12) to an on-off valve (30), a second fluid line (32) from the on-off valve (30) to a first system area (14) to be fed with fluid, and a third fluid line (34) from the on-off valve (30) to the reservoir (12). The on-off valve (30) establishes a connection between the first fluid line (28) and the second fluid line (32) in a first valve position and establishes a connection between the second fluid line (32) and the third fluid line (34) in a second valve position. A first fluid delivery arrangement (26) is provided for delivering fluid from the reservoir (12) into the second fluid line (12). A second fluid delivery arrangement (20, 24) is provided for delivering fluid from the third fluid line (34) into the reservoir (12).

Abstract: A double action directional fluid flow valve includes a stepped piston connected with a poppet valve and moveable by a controller between open and closed positions by applying a continuous pressure to a small diameter piston face and selectively applying and removing pressure from a large diameter piston face to move the poppet valve between an open position and a closed position.

Abstract: A railway brake cylinder includes a body (11?); a piston (13?) mobile relative to the body (11?) to act on a brake linkage and delimiting with the body (11?) a pressure chamber (10?) adapted to be supplied by a pneumatic pressure agent source; an auxiliary actuating member (26?) mobile relative to the body (11?) and the piston (13?), mechanically connected to manual operating elements to cause it to occupy either a rest position in which it is away from the piston (13?) or a pushing position in which it is in contact with the piston (13?); two orifices (73?, 51?) in fluid communication with the chamber (10?) and the atmosphere, respectively; and selective connecting elements (28?) between the two orifices (73?, 51?), the elements (28?) being mechanically connected to the auxiliary actuating member.

Abstract: The invention relates to a slide vane (20) for a hydraulic power steering of automotive vehicles with a tubular control sleeve (24). Said control sleeve is connected to an output shaft (28) and comprises first control grooves (32) in its inner surface (34). Further, there is provided a tubular sliding sleeve (26) that is disposed at least in portions within said control sleeve (24). On its outer surface (38), the sliding sleeve (26) comprises second control grooves (36) that may be brought to coincide with the first control grooves (32) of the control sleeve (24), said first control grooves (32) being disposed substantially in the circumferential direction of the tubular control sleeve (24) and said second control grooves (36) substantially in the circumferential direction of said tubular sliding sleeve (26). The relative position of said control sleeve (24) and of said sliding sleeve (26) being relatively variable in the axial direction.

Abstract: A pressure control valve assembly including a valve body with a valving cavity, a metal insert, a member and ball, a plastic internal ball guide, and a plug. The metal insert, which is received within the valving cavity, includes an exhaust port, a pressure control port, a supply port, and a plug-receiving end. The plastic internal ball guide is included within a portion of the metal insert. The member extends within a portion of the insert and is movable with respect to the exhaust port, the member moving a ball with respect to a supply port. In an embodiment, a plug is received within the plug-receiving end of the insert. A method for making a valve body for a valve assembly is also disclosed.

Abstract: A valve assembly includes a solenoid can having an internal coil. A valve body connected to the solenoid can includes an inlet port and a first valve seat. An axially adjustable retainer threadably connected to the valve body includes an end portion defining a second valve seat. A homogenous valve member/armature slidably disposed in the valve body moves in the presence of a coil generated magnetic flux between valve closed and valve open positions. A valve member/armature first surface area is in fluid communication with a pressurized fluid through the inlet port. A valve member/armature second surface area is in fluid communication with the pressurized fluid in the valve closed position. The first surface area is equal to the second surface area and the pressurized fluid acts equally on the first and second surface areas defining a pressure balanced condition in the valve closed position.

Abstract: A hydraulic rock breaking device, a protection valve and a method of operating a hydraulic rock breaking device. The rock breaking device comprises a percussion device to which pressure fluid is fed along an inlet channel. The inlet channel is provided with a protection valve arranged to monitor the volume flow of pressure fluid flowing through it. If the flow is larger than what has been preset, the protection valve closes, at least partly, the connection through it, protecting thus the percussion device against too high an input power. The protection valve comprises a throttle which generates a pressure difference the magnitude of which is dependent on the fed volume flow. Information on the pressure difference is utilized in controlling the protection valve.

Abstract: A microvalve device for controlling the supply of pressurized fluid to a load in a fluid circuit, and having multiple internal fluid conduits for providing pressure feedback.

Abstract: A sleeve has an input port, an output port, an insertion hole, and only one discharge port. A spool is axially slidable through the insertion hole to communicate among the input port, the output port, and the discharge port. An electric actuator is provided to one end of the sleeve and has a variable volume chamber, which communicates with the discharge port through an axial through hole and a spool breathing hole in the spool. The spool has a communication through hole to lead fluid from the output port to the discharge port through the axial through hole. A passage partition member is in the axial through hole to define an in-spool breathing passage communicating with the spool breathing hole.

Abstract: A spool valve includes a housing defining a bore that extends along a longitudinal axis. A spool is disposed within the bore and is moveable between a first position for directing a hydraulic fluid along a first flow path and a second position for directing the hydraulic fluid along a second flow path. The spool includes a supply portion disposed between a first land portion and a second land portion. The supply portion includes an outer surface that defines a truncated pseudosphere for smoothly directing the flow of the hydraulic fluid across the surface of the spool.

Abstract: A hydraulic valve includes a valve body, a valve spool that is movable relative to the valve body for controlling fluid flow through the valve body, and a spool return assembly for biasing the valve spool into a centered position relative to the valve body. The hydraulic valve further includes a position sensor assembly having a sensor portion affixed relative to the valve body and a movable portion that is movable relative to the sensor portion in response to movement of the valve spool. The sensor portion is responsive to a position of the movable portion for outputting a signal indicative of the position of the valve spool relative to the valve body. The movable portion of the position sensor assembly is biased into engagement with the spool return assembly.

Abstract: A three-port control valve assembly comprising a valve body having two valve seats facing in a common direction and disposed along a central bore terminating in an exhaust port and communicating with a supply port and a common port. A pintle shaft connected to a solenoid actuator extends into the central bore. A first valve head mounted on the pintle shaft mates with the first valve seat to connect the supply port to the common port. While the solenoid is de-energized, supply pressure keeps the first valve closed. A second valve head mates with the second valve seat to connect the common port to the exhaust port. Opening of the first valve closes the second valve via supply oil pressure. When the first valve closes, the second valve is opened by a spring disposed between the second valve head and the exhaust port.

Abstract: An outfeed gate includes a fixed plate and a sliding plate, wherein bearing strips protect the fixed and sliding plates from excessive wear as they slide over each other. The outfeed gate safely accepts material from a high temperature and pressure environment to an ambient environment, and deposits the material in a material exit apparatus.

Abstract: A cartridge valve assembly includes a body having a central bore, a first port, a second port, and a third port fluidly connected to the central bore. The cartridge valve assembly further includes a main spool positioned within the central bore and being movable between at least a first position and a second position. The main spool forms, within the central bore, a first chamber, and a second chamber, and a control chamber. The cartridge valve assembly also includes a first passage fluidly communicating the first chamber with the second chamber, and an actuator adapted to apply a force to a first end of the main spool. The cartridge valve assembly further includes a feedback spool having an end exposed to a feedback chamber formed within the body, and a second passage fluidly communicating the control chamber with the feedback chamber.

Abstract: A 4-way 3-position direct acting tandem center neutral valve has two 3-way, 2-position poppet valves configured so as to provide 4-way, 3-position tandem center neutral valve functions so that it is direct acting and essentially zero leak.

Abstract: A one piece double membrane diaphragm is disclosed. The double membrane diaphragm has an upper (308) and lower diaphragm membrane (310) joined together by a central section (312). The upper diaphragm membrane (308) is configured to seal against a top sealing surface (222) when the diaphragm is in a first position. The lower diaphragm membrane (310) is configured to seal against a bottom sealing surface (224) when the diaphragm is in a second position. An upper rim (318) may be attached to the upper diaphragm membrane (308) where the upper rim (318) is configured to hold the upper diaphragm membrane (308) into the valve. A lower rim (320) may be attached to the lower diaphragm membrane (310) where the lower rim (320) is configured to hold the lower diaphragm membrane (320) into the valve. The diaphragm may also be made from a resilient material and shaped ia such a way as to create a spring force holding the diaphragm into a default position in the valve.