Abstract: A fuel supply system for a turbine engine that provides a modulated thrust control malfunction accommodation (TCMA) is disclosed. An example fuel supply system includes a fuel supply line to supply fuel to a combustion engine, a fuel metering valve coupled to the fuel supply line, the fuel metering valve to control a flow of fuel through the fuel supply line to the combustion engine, a throttle valve coupled to the fuel supply line downstream of the fuel metering valve, the throttle valve to bleed off fuel supplied to the combustion engine based on a pressure difference across the fuel metering valve, and a controllable servo coupled to the throttle valve, the controllable servo to control the throttle valve based on a sensor output indicative of the pressure difference.

Abstract: A relay valve module for an electronically controllable pneumatic brake system for actuating wheel brakes of a utility vehicle includes: a reservoir connection for receiving a reservoir pressure; a brake control pressure connection for receiving a brake control pressure; at least one first service brake connection for outputting a service brake pressure; a relay valve with a relay valve reservoir connection, which is connected to the reservoir connection, a relay valve working connection, which is connected to the first service brake connection, a relay valve ventilation connection, and a relay valve control connection; an electropneumatic pilot control unit, which is connected to the reservoir connection, the electropneumatic pilot control unit providing a pilot control pressure; and a shuttle valve with a first shuttle valve inlet, a second shuttle valve inlet, and a shuttle valve outlet. The first shuttle valve inlet is connected to the brake control pressure connection.

Abstract: The protection device has a valve and a valve actuator, able to move the valve to a closed position when a pressure upstream of the valve exceeds a predetermined threshold pressure. The valve actuator includes a biaser, to maintain the valve in an open position; an actuation mechanism, to move the valve to the closed position, the actuation mechanism with a fluid sampling passage to fluidly connect the flow line to a fluid actuated surface of the actuation mechanism. At least a rupture element preventing the passage of fluid from the flow line when the pressure upstream of the rupture element is lower than the threshold pressure, the rupture element being able to break at the threshold pressure.

Abstract: A differential pressure motor comprising two working pistons and a rod that move in a hollow space. Walls defining the hollow space have five openings. A valve piston moves between and against the working pistons and can be driven by the working pistons. The valve piston with the five openings forms a valve with which an alternate impact of a first pressure and a second pressure on the working pistons is controllable when the pressures are applied to three of the five openings such that the working pistons periodically move which drives a periodic movement of the valve piston. Also disclosed are a surgical drive system with, a medical lavage system for the debridement of soft tissue and/or bone tissue having, and a medical device for brushing, rasping or sawing soft tissue and/or bone tissue with such a differential pressure motor, and a method for operating a differential pressure motor.

Abstract: A depressurisation valve for a cooling system including a main chamber having a main valve, a pilot line having a secondary valve and a blowdown line; the main valve being located to seal a path of the coolant system of the nuclear reactor. The main chamber is connected to the cooling circuit via the pilot line allowing coolant to enter the main chamber, and the blowdown line allows coolant to escape from the main chamber, the pilot line having a lower fluid resistance than the blowdown line. The pressure of coolant in the main chamber maintains the main valve in a closed position, and under elevated temperature and/or pressure conditions fluid is prevented from entering the main chamber via a closure of the secondary valve on the pilot line and reduce the pressure from the valve, moving it to its open position.

Abstract: A control system having a first pressure regulator, a downstream fluid control device, first pilot, and second pilot. The first pressure regulator has a fluid inlet, fluid outlet, and actuator assembly with a cavity divided into a first chamber and a second chamber. The downstream fluid control device has a second fluid inlet and a second fluid outlet. The first pilot has a first setpoint and the second pilot has a second setpoint, less than the first setpoint. The first and second pilots fluidly couple the second chamber to the second fluid outlet in a first mode of operation, isolate the second chamber from the second fluid outlet in a second mode of operation, and fluidly couple the second chamber to the fluid inlet in a third mode of operation.

Abstract: A fluidic control system (1) for controlling a vehicle, which includes a controller (2) and a closed fluidic circuit. The circuit includes a pump (3) for pressurizing fluid in the circuit, valve means (40, 50, 60), an actuator (4, 5, 6) and a precharge accumulator (7). The valve means (40, 50, 60) is fluidly connected to the inlet and outlet of the pump (3) and the actuator (4, 6) is fluidly connected to the valve means (40, 50, 60) for selectively receiving pressurized fluid therefrom. The precharge accumulator (7) includes a movable member (73, FIG. 2) that describes a variable volume (71) fluidly connected to the circuit between the valve means (40, 50, 60) and the inlet of the pump (3). The system (1) also includes a sensor (70) for determining the position of the movable member (73) for estimating the quantity of fluid and/or detecting an abnormal pressure variation within the circuit.

Abstract: A valve includes a first inline compartment to attach to a first return line exiting a processing chamber and a second inline compartment to attach to a second return line entering a coolant source. A flow compartment is attached between the first inline compartment and the second inline compartment and through which a coolant is to return to the coolant source. A first inlet orifice and a second inlet orifice positioned between the first inline compartment and the flow compartment. A plunger has a tip to variably open and close the second inlet orifice. A shape memory alloy (SMA) spring is positioned on the plunger and attached to the tip, the SMA spring to variably increase or decrease a flow rate of the coolant through the second inlet orifice according to a temperature of the coolant.

Abstract: A flow arrangement for a pressure relief valve assembly can include a bypass flow path extending from a pressure source to a dome of a relief valve. The bypass flow path can include a valve that is configured to open and close the bypass flow path based on pressure at the pressure source or the dome, or a pressure difference between the pressure source and the dome.

Abstract: A flow arrangement for a control valve can include a plurality of flow-control components that are movable relative to each other and that define at least part of a flow path from a pressure source to a dome of a pressure relief valve. The flow-control components can be movable relative to each other in response to system pressure to selectively increase or decrease the flow capacity of the flow path. In some cases, flow capacity can be increased or decreased during initial loading of the dome, at low pressures, or at higher pressures.

Abstract: An system for emptying at least one reservoir containing a pressurized fluid, including, for each reservoir, a vent for discharging the fluid out of the reservoir and a discharge valve for connecting the reservoir to the vent, the emptying system additionally including, for each discharge valve, a return member for returning the discharge valve to its closed configuration, and a fluid control system for controlling the movement of each discharge valve to its open configuration by action of an operating fluid on the discharge valve, the control system including an operating station arranged outside a danger zone around each reservoir, and, for each discharge valve, a fluid pipe fluidically connecting the operating station to the discharge valve, the operating station including at least one reversible free connection for connecting to each fluid pipe of a device for supplying the control system with operating fluid.

Abstract: A fuel extraction system for extracting a gaseous fuel from a fuel tank. The fuel extraction system includes a conveying device which is configured to convey gaseous fuel and to bring it from a first pressure level to a second pressure level, a first line which is configured to connect the conveying device fluidically to the interior of the fuel tank, a buffer tank which is configured to store the fuel at the second pressure level, and which has a first outlet and a second outlet, at least one valve with a pneumatic actuating device, and a second line which is connected to the first outlet of the buffer tank and is configured to conduct a part of the fuel at the second pressure level to the pneumatic actuating device of the at least one valve. Furthermore, a fuel tank apparatus and a fuel cell system are described.

Abstract: Method for diagnosing a pneumatic control valve by using a positioner model includes: establishing relational expression for outputting valve stem displacement according to control pressure, the relational expression including parameters for the characteristics of a positioner, an actuator, and a valve, determining initial parameter value by adjusting the values of the parameters until the difference between a measured value for a normal operation of the pneumatic control valve and output value obtained by the relational expression is smaller than predetermined error limit, determining diagnostic parameter value by adjusting the values of the parameters until the difference between a measured value for a diagnostic operation of the pneumatic control valve and an output value obtained by the relational expression is smaller than a predetermined error limit, and comparing the initial parameter value and the diagnostic parameter value so as to determine whether the pneumatic control valve has abnormality.

Abstract: A valve device includes: valves configured to control a flow of processing gases supplied to a process vessel; a housing in which first flow paths through which the processing gases flow are formed; a heat diffuser configured to cover the housing and diffuse heat of the housing; a heating part configured to cover the housing covered with the heat diffuser and heat the housing via the heat diffuser; a supply configured to supply a coolant to a second flow path formed between the housing and the heat diffuser; and a controller configure to control the heating part to heat the housing to a first temperature when a predetermined process is performed on a target substrate, and before a start of a cleaning process of the process vessel, control the heating part to stop heating of the housing and control the supply to supply the coolant to the second flow path.

Abstract: A surge relief angle valve (SRA) is disclosed. The surge relief angle valve is held normally-closed by one or more compression spring(s). In certain embodiments the surge relief angle valve includes a body containing a disc and disc seat; a piston and shaft, the piston and shaft in communication with the disc and disc seat; and a spring providing a force against the piston; wherein the spring is enclosed within a housing and wherein the surge relief valve has a closed self-contained hydraulic system containing the piston and shaft, and providing a dampening force against the spring force.

Abstract: A control system having a pressure regulator, first pilot, and second pilot. The pressure regulator has a fluid inlet, fluid outlet, and actuator assembly with a cavity divided into a first chamber in fluid communication with the fluid outlet and a second chamber. The first pilot has a first setpoint and the second pilot has a second setpoint, less than the first setpoint. The first and second pilots fluidly couple the second chamber to the fluid outlet and isolate the second chamber from the fluid inlet in a first mode of operation, isolate the second chamber from the fluid outlet and fluid inlet in a second mode of operation, and fluidly couple the second chamber to the fluid inlet in a third mode of operation.

Abstract: A fluidic logic and actuator system for outputting a displacement having a fluidic logic circuitry layer including a fluidic control input and a plurality of fluidic latching memory units. At least some of the plurality of fluidic latching memory units are configured to perform combinatorial and sequential logic functions and output a fluid response. A fluid actuator layer is provided having a plurality of fluid actuators, wherein each of the plurality of fluid actuators being movable in response to the fluid response of a corresponding one of the plurality of fluidic latching memory units.

Abstract: A vaporized fuel treatment device includes a sealing valve disposed in a vapor passage between a fuel tank and a canister. An ECU is programmed to decrease an internal pressure of the fuel tank by a pump via the canister so as to diagnose whether leakage occurs in the vapor passage in a state where the communication between the canister and the atmosphere is cut off and the sealing valve is opened. The ECU is programmed to execute a learning of a valve opening start position of the sealing valve based on a change in the internal pressure of the fuel tank when changing an axial distance between valve element and a valve seat when the internal pressure of the fuel tank is equal to or smaller than a predetermined value after a diagnosis of leakage in the vapor passage.

Abstract: A pressure-type flow rate control device includes a control valve; a pressure sensor provided downstream of the control valve; an orifice-built-in valve provided downstream of the pressure sensor; and a control unit connected to the control valve and pressure sensor. The built-in orifice valve has a valve mechanism comprising a valve seat body and a valve element for opening/closing a flow path; a drive mechanism for driving the valve mechanism, and an orifice member provided in the vicinity of the valve mechanism. The pressure-type flow rate control device further includes an opening/closing-detection mechanism for detecting the open/closed state of the valve mechanism, the control unit being configured to receive a detection signal from the opening/closing-detection mechanism.

Abstract: A piston pump includes a perforated disk as a throttle, in a central hole of which an outlet valve is arranged and its inner edge is fixed externally on a cylinder sleeve base of the piston pump and an outer edge of which lies with prestress on an annular support. Brake fluid displaced out of the piston pump lifts the perforated disk-shaped throttle off from the annular support, with which a dynamic throttle is formed. A throttle channel which negotiates the annular support in the perforated disk-shaped throttle also enables a throughflow in the case of a throttle lying on the annular support.

Abstract: A method and apparatus of filing beer for craft breweries combines pressurized beer delivery (rather than gravity feed) with variable pressure control of the beer flow into the can. By modulating beer flow and especially beer pressure, it is possible to fill a can's widget (gas reservoir) with gas with a shorter set of fill steps. In addition, the speed of beer filling can be dramatically increased compared to small scale systems normally used by craft brewers. Unlike known large scale pressure systems, the beer bowl may be located beneath the rest of the apparatus and modulated pressure may be used, making for a smaller and more portable unit.

Abstract: A system and method for detecting a fluid leak in a turbomachine. The turbomachine includes a high temperature fluid source, at least one fluid distribution pipe adapted to distribute the fluid to different parts of the turbomachine and/or an aircraft which is to be equipped with the turbomachine, a turbomachine compartment in which the distribution pipe is at least partly accommodated, the compartment having in operation a low temperature relative to the high temperature of the fluid supplied by the fluid source. The method includes measuring a temperature variation in the compartment between two instants to obtain a temperature gradient, and detecting a fluid leak when the temperature gradient is greater than or equal to a threshold temperature gradient.

Abstract: A flow control valve including a main valve and a pilot valve for controlling a piston of the main valve. The valve maybe controlled through a control system based on measured pressures or temperatures in a system supplied or controlled by the valve. The valve may be operated as a pressure independent control valve, using pressure measurement from a supply line and exit line or return line of a hydronic HVAC system as inputs to the control system, which is operable to maintain a constant pressure drop across the system, or the valve may be operated as a temperature independent control valve, using temperature measurements from a supply line and exit line or return line of a hydronic HVAC system as inputs to the control system which is operable to maintain a constant temperature drop across the system.

Abstract: A method of monitoring a gas turbine engine start system includes monitoring a pressure in a starter air duct in communication with a starter air valve which is in communication with an air turbine starter (ATS); identifying an expected transient pressure response in the starter air duct; and identifying the starter air valve as degraded if the expected transient pressure response does not occur after an open command to the starter air valve.

Abstract: An operating control line is in communication with an operating piston for the safety valve as well as an equalizing piston such that pressure in the operating control line opens the safety valve and holds the equalizer valve closed. A balance chamber receives fluid from an operating piston in the safety valve when the valve opens to displace a floating piston to the open position. Operating control line pressure reduction allows valve closure and opposite floating piston movement to the closed position. If the floating piston is forced by a tubing seal leak against the open position travel stop, pressure in a balance control line against the equalizing valve member moves it from a seat to then equalize pressure on opposed ends of the floating piston allowing a bias force to move the floating piston off the open position stop so the safety valve can open despite the tubing leak.

Abstract: A combination light and pressure relief vent (10) is disclosed which includes a housing (11), a valve assembly (12), and a light assembly (13). The housing include a valve body (16), port tube (17), and an outside louver (18). The valve body has a low pressure intake port (25), a high pressure intake port (26), and a low pressure exhaust port (27). The valve assembly includes a low pressure intake valve (40), a high pressure intake valve (42), and a low pressure exhaust valve (44). The light assembly includes a heat sink casing (51) which partially defines a heat chamber (52). The casing has a front wall (55) to which is mounted an LED module (57). A lens cover (61) is coupled to the front surface of the casing. Heat generated by the LED module is transferred through the casing to the heat chamber to warm the valve assembly.

Abstract: Provided is a valve assembly system including a flowbody including a channel formed at an inner surface thereof, a butterfly plate disposed within the channel and rotatably mounted within the flowbody. The system also includes a pair of dual-sided pistons that receive differential pressure at an input side and an output side of the valve assembly system. A spring is controlled for biasing against at least one of the dual-sided pistons based on the differential pressure, and to rotate the butterfly plate to regulate the differential pressure and the valve assembly system to a predetermined output pressure.

Abstract: An air flow control assembly moves a pressurized air stream to a cyclical application, such as a molding machine, with air pressure at the cyclical application returned to the air flow control assembly to modulate the rate at which the air stream is delivered to the cyclical application.

Abstract: A cooling apparatus includes: an evaporator in which a coolant is housed and that evaporates the coolant; a condenser that condenses the coolant evaporated by the evaporator; a pathway section that includes a vapor path and a liquid path each placing the inside of the evaporator and the inside of the condenser in communication with each other, and that circulates the coolant between the evaporator and the condenser; a valve that is provided to at least one path out of the vapor path or the liquid path; and a pressure regulation section that increases an opening amount of the valve according to an increase in pressure inside the evaporator.

Abstract: A method for monitoring the change in state of a valve in a start up circuit of a turbo-engine following a command to change the state of the valve includes measuring the air pressure under a fan cowl of the turbo-engine before the change state command, measuring the air pressure under the fan cowl after the change state command, comparing the measured values of the air pressure, and determining whether or not the valve has actually changed state. An aircraft turbo-engine includes a unit that monitors the change in the valve using such a method.

Abstract: Aircraft and air scoop systems are provided. An aircraft includes an interior compartment, an outer skin, an air scoop, it movable element, and a passive pneumatic actuator. The interior compartment encloses a substantially constant interior air mass at a cabin pressure during flight and the outer skin at least partially defines a ventilated cavity. The air scoop is disposed on the outer skin and communicates air between the ventilated cavity and an external environment in which the aircraft is located. The movable element is movable between an open position and a closed position over the air scoop to define an air flow area through the air scoop. The passive pneumatic actuator is operatively coupled with the movable element and moves the movable element towards the closed position in response to an increasing altitude of the aircraft based on a differential pressure between the interior air mass and the external environment.

Abstract: A diaphragm-type control valve (10) having a valve body (12) holding a diaphragm (100) and an expansion member (150) is provided preferably for use in the separation of and fluid control between a fluid source and a pressurized gas volume. An inner surface of the valve body defines a chamber having an inlet (14) and an outlet (16) in communication with the chamber, and an elongated seat member (26). The expansion member (150) biases the diaphragm (100) to a seated position within the valve.

Abstract: A safety valve control system may include a remotely operable control assembly, a first transducer, a valve assembly, and a compressor assembly in communication with the control assembly. The control assembly is operable to actuate the pump and valve assemblies to supply fluid to actuate the safety valve into open and closed positions, in response to one or more signals received from the first transducer. A method of operation may include maintaining the safety valve in an open or closed position while sensing a physical property with the control system; communicating a signal corresponding to the sensed physical property to the control system; and automatically closing or opening the safety valve in response to a comparison of the sensed physical property to a pre-set condition.

Abstract: Disclosed is a pressure determining unit configured for determining a pressure of a fluid. The pressure determining unit comprises a body structure and a deformation detector. The body structure has a fluidic path configured for conducting the fluid, wherein the body structure has a first surface in a first dimension and in a second dimension, and a thickness in a third dimension. The deformation detector is configured for responding to an elongation into the second dimension of the first surface of the body structure by generating a signal indicative of a value of the pressure of the fluid in the body structure. The fluidic path of the body structure comprises one or more first channel segments, each first channel segment having a height into the third dimension being at least twice of its width into the second dimension.

Abstract: Control systems include various combinations of pressure regulators, pilots, and pressure stabilizers to provide systems with adjustable deadbands for over pressure protection, adjustable deadbands for under pressure protection, adjustable deadbands for both over pressure and under pressure protection, pressure assisted closure for over pressure protection, pressure assisted closure for under pressure protection, pressure assisted closure for both over pressure and under pressure protection, or spring assisted closure for over pressure and under pressure protection.

Abstract: A damping valve includes a main valve opening and closing a main passage, and a pilot passage reducing a pressure of the upstream of the main passage by a throttle to guide as a back-pressure biasing the main valve to the closing direction. A pressure control valve being disposed on the downstream of the throttle and including a seating portion controlling the back-pressure, and a switching valve including a circular depressed portion opening and closing the pilot passage are integrated and controlled by a single solenoid. The damping valve includes fail passages being branched from the downstream of the throttle to bypass the main valve, and a fail valve opening and closing the fail passage. The switching valve is arranged on the upstream of the pressure control valve in the pilot passage. The fail passages are branched from the upstream of the switching valve of the pilot passage.

Abstract: A safety valve includes a housing defining first and secondary piston bores in fluid communication with each other via a port. A first piston is movably arranged within the first piston bore and has a first piston rod extending longitudinally from the first piston and coupled to a flow tube. A second piston is movably arranged within the secondary piston bore and has a secondary piston rod extending longitudinally from the second piston and axially engageable with the flow tube. Hydraulic fluid pressure acts on the first piston until the first piston axially moves and exposes the port, whereby the hydraulic fluid pressure is then able to enter the secondary piston bore and also act on the second piston.

Abstract: A water pressure regenerated type water softener including: a timer control valve having a valve control unit rotated by a timer spring and into which raw water is supplied; a plurality of conduits into which the raw water selectively flows under the control of the timer control valve; a regeneration tank communicating with a regeneration tank inlet conduit of the conduits; and a resin tank unit receiving regeneration water flowing from the regeneration tank and containing an ion exchange resin therein. The water softener can be operated in one of stop mode, soft water mode, raw water mode and regeneration mode under the control of the valve control unit. When regeneration mode is selected, the valve control unit rotates to stop mode by the timer spring after a preset amount of time has elapsed.

Abstract: A fluid controller includes an automatic opening-and-closing device configured to move a valve rod upward and downward, and a manual opening-and-closing device configured to move the valve rod upward and downward by a manual operation. The manual opening-and-closing device includes a cylindrical handle supported by a casing so as to be rotatable and not to move upward and downward, and a cylindrical operating member screwed into a female screw of the handle and configured to move upward and downward with a rotation of the handle. The operating member is apart from a piston of the automatic opening-and-closing device in a vertical direction in an automatic operation. The piston is moved by the operating member which moves upward in association with the rotating operation of the handle in a manual operation in an opposite direction from the opening state brought by the automatic opening-and-closing device.

Abstract: A butterfly valve with a housing having a bypass passage located within the housing of the valve. The passage extends from the normal flow path through the valve, either side of the butterfly valve plate so as to provide an alternative flow path. A cavity is located between distal ends of the passage. A valve head, located in the cavity is configured and arranged to be movable within the cavity between a closed position in which, the distal ends of the passage are fluidly disconnected through the passage and an open position in which the distal ends of the passage are fluidly connected through the passage.

Abstract: A pneumatically controlled assembly, system, method and device for the regulation of pressure of a gas as it flows in a pressurized line and including at least one loading valve which is set to respond to variations in pressure in conjunction with a pneumatically actuated process control valve so as to effectively regulate and maintain pressure of the gas in the pressurized line.

Abstract: In order to achieve an ionization method of high robustness with a small carry-over or less crosstalk, an ionization method is disclosed. A method includes the steps of: joining an ionization unit to a tube; sucking the sample from a sample container into a sample holder of the ionization unit to hold the sample; moving the ionization unit holding the sample to near the ionization unit using an ionization unit drive unit; and applying a voltage to the ionization unit using a power supply to ionize the sample by electrostatically spraying the sample from the holding unit.

Abstract: A module for producing extreme ultraviolet radiation, including an extreme ultraviolet radiation-emitting source, the source being provided with a supply configured to supply a fluid of an ignition material to a predetermined target ignition position and a target-igniting mechanism constructed and arranged to produce a plasma from the ignition material at the target ignition position, the plasma emitting the extreme ultraviolet radiation; a collector mirror constructed and arranged to focus radiation emitted by the plasma at a focal point; and a heat sink having a thermal energy-diverting surface constructed and arranged to divert thermal energy away from the target ignition position, wherein the heat sink is located at a position proximate the target ignition position.

Abstract: The invention allows securing greater discharge pressure and flow rate at high revolutions of an engine in order to secure lubrication and cooling, while reducing discharge pressure and flow rate at low and medium revolutions of the engine in order to improve efficiency. The invention includes a housing; a relief valve; a valve passage; a main discharge flow channel; a main relief flow channel; an auxiliary relief flow channel; a solenoid valve mounted on the auxiliary relief flow channel; and a spring. The solenoid valve is controlled so as to switch between communication and shut-off between the auxiliary relief flow channel and the large-diameter passage section in accordance with an increase or decrease in engine revolutions, and oil in the large-diameter passage section is discharged when the shut-off is implemented.

Abstract: An assembly of valve sections includes an inlet section, an outlet section, a working section, and a working section. The working section is a conventional pressure compensated working section. The working section includes a directional control valve, a pressure compensator valve, and a pressure limiter valve. The valves are of integral construction, such that each is an essential part to complete the other. The pressure compensator valve includes a pressure compensator spool movable between an opened position and a closed position in response to a pressure differential across the spool. The pressure limiter valve includes a pressure limiter spool that moves to an open position to change the pressure differential and close the pressure compensator valve when a selected limit pressure is reached.

Abstract: A positioner includes a shift magnitude calculating portion that calculates a shift magnitude from the equilibrium state of a pilot relay, from an input air pressure that is inputted into the pilot relay and an output air pressure that is outputted from the pilot relay. A control calculating portion determines a control signal from an actual opening signal, an opening setting value, and the shift magnitude from the equilibrium state of the pilot relay that is calculated by the shift magnitude calculating portion, and outputs it to the electropneumatic converter.

Abstract: A pilot valve (2) for controlling operation of a hydraulically-actuated pressure reducing valve, the pilot valve including a housing (4), and a first valve member (15) mounted in the housing for longitudinal movement along an axis relative to the housing and to a second valve member (22) in response to the outlet pressure of the pressure reducing valve. The first valve member is provided with an aperture (20) and the second valve member comprises a closure portion which varies the effective flow cross section of the aperture in accordance with relative longitudinal movement between the first and second valve members. An adjuster (26) controls the relative rotational position of the first and second valve members, the closure portion having a profile such that relative rotation between the first and second valve members causes the closure portion to vary the effective flow cross section of the aperture (20).

Abstract: A pressure regulator, including a housing; a piston axially movably disposed in the housing; a high-pressure chamber; a low-pressure chamber; a regulated-pressure chamber whose pressure biases the piston in a first direction in an axial direction of the housing; a first pilot chamber whose pressure biases the piston in a second direction opposite to the first direction; a second pilot chamber whose pressure biases the piston in the second direction; and a valve mechanism configured such that, by a movement of the piston in the second direction, communication between the regulated-pressure chamber and the high-pressure chamber is permitted while communication between the regulated-pressure chamber and the low-pressure chamber is shut off and such that, by a movement of the piston in the first direction, the communication between the regulated-pressure chamber and the high-pressure chamber is shut off while the communication between the regulated-pressure chamber and the low-pressure chamber is permitted.

Abstract: A pilot type pressure regulator has: a primary port to which air is supplied from the outside; and a secondary port discharging air regulated by a main valve body provided to a main valve shaft. A main valve diaphragm abutting on an abutting end surface of the main valve shaft partitions an inner space into a secondary pressure chamber communicating with the secondary port and a pilot pressure chamber to which pilot pressure is supplied. This pressure regulator has an exhaust mechanism exhausting air from the secondary pressure chamber to the outside when pressure of the secondary port exceeds a set value. In the exhaust mechanism, a stopper holding a sealing material in a guide hole is inserted from the side close to a main valve hole, that is, an inner end portion.

Abstract: A lubrication system for a tool powered by a drive fluid is provided. The lubrication system includes a reservoir configured to deliver a lubricant and a plunger disposed within the reservoir. The plunger is configured to selectively generate a pilot signal based on a level of the lubricant. The lubrication system further includes a valve having a housing. The housing includes a drive fluid inlet and a drive fluid outlet. The valve also includes a pilot spool configured to move from a neutral position to an actuated position in response to the pilot signal. The valve further includes a main spool selectively actuated by a pressure of the drive fluid to move from a first position to a second position in response to the movement of the pilot spool such that in the second position the drive fluid inlet is in fluid communication with the drive fluid outlet.