Abstract: Devices and methods for compressing thermal insulation material into blocks of insulation are disclosed which include a support surface for the compressed blocks of insulation, a compression device with a compression surface, and a feeding device for feeding thermal insulation material. By adapting the compression device for reciprocal movement between a first position, wherein the feeding device is allowed to feed thermal insulation material to a position on the support surface, and a second position, wherein, during movement from the first position to the second position of the compression device, thermal insulation material fed by the feeding device is compressed, highly compressed blocks of thermal insulation material are obtained that are suitable for use with known shredding devices.

Abstract: A valve includes an inlet and an outlet; a body including a first seat and a second seat; a cavity in the body; a piston positioned in the cavity; and a pilot ball adjacent the piston and that is disposed in a pilot seat, and a rear surface of the piston butts against the pilot seat at a maximum open position of the piston. Each of the first seat and the second seat is a seat that is a mechanical stop that prevents the piston from extending further than the closed position. The piston includes a flat front face that contacts the first seat when in the closed position, and a nose extension that extends outward and away from a center portion of the front face, and the nose extension has an opening through a center of a front surface thereof.

Abstract: An evacuation unit is configured to remove entrapped fluid from a flow control. These configurations may incorporate devices that can passively discharge fluid in response to loss of system pressure. These devices may use gravity or spring-assist as mechanisms to move fluid out of spaces in the device. This feature mitigates risks that the entrapped fluid freezes and expands, which can cause damage to metal components and lead to extensive downtime of process lines. As an added benefit, the features can reduce product costs or complexity because the proposed designs avoid the need for additional, peripheral “accessories,” like pumps or heating elements, resident at the location of the flow control.

Abstract: Methods and systems are provided for a power-generating fluid flow arrangement. In one example, the fluid flow arrangement may include a primary conduit flowing a pressurized fluid and a bypass conduit coupled to the primary conduit. The bypass conduit may divert a portion of the pressurized fluid flow from the primary conduit to drive rotation of a turbine. A dual valve may be arranged in the bypass conduit to control both flow and pressure in the fluid flow arrangement.

Abstract: A spraying system for an agricultural vehicle including a spraying boom and a circuit including a tank, a pump, a pilot-operated pressure regulator and a plurality of spraying sections each including at least one spraying device including at least one spraying nozzle designed to spray treatment liquid on plants to be treated in the field, a first distributor and at least one direct acting pressure limiter, the circuit also including a second distributor and a spraying system a control unit designed to implement a step to prime the spraying system.

Abstract: A cap for a temporary fastener comprises a hollow, cup-shaped body and an inwardly tapered neck. The hollow body fits over a workpiece-engaging portion of the temporary fastener, and the neck extends from the hollow body. The tapered neck terminates in a hollow tip that is sized and configured to fit over aligned holes in the joined workpieces and to contact a minimal surface area of the outermost workpiece to reduce surface damage to the workpieces such that any damage will be removed when the holes are countersunk in the normal course of assembly.

Abstract: A pilot assembly is configured for use with various types of flow controls. These configurations include a manifold with an internal flow network that connects pilot valves and an adjustable orifice. The pilot valves may have a fixed and variable differential pressure. In one implementation, the manifold comprises a pair of separable blocks, one each that includes part of the internal flow network. This construction also permits the manifold to expand with, for example, and additional block for an additional pilot valve. This feature configures the manifold for use in working monitor systems or those systems that deploy multi-stage pressure regulation.

Abstract: A pressure regulator is configured for better accuracy and response times at higher inlet pressures. These configurations may integrate two-path control with a pressure-balanced plug. The two-path control may leverage a pair of pilot valves, one with a fixed differential pressure and the other with a variable differential pressure. In one implementation, the device is plumbed so that downstream pressure is sensed at both the actuator and the variable differential pressure pilot valve.

Abstract: A pressure reduction plant including two or more valve assemblies arranged in parallel and including: pressure reducers for fuel gas from the supply pressure to the delivery pressure; pilot valves to transmit a control pressure to the pressure reducers when the delivery pressure reaches the calibration value of the pilot valves; derivation conduits to transmit the delivery pressure to the pressure reducers, the pilot valves and the pressure reducer devices; command lines to transmit the control pressure from the pilot valves to the pressure reducers. One of the pilot valves is configured with a calibration value greater than the calibration value of all the remaining pilot valves and each command line is configured to communicate with a control line.

Abstract: A fuel metering system includes a metering valve having a first inlet fluidly coupled to a source of fluid at a first pressure, a second inlet, a first outlet and a second outlet. The metering valve includes a slot, and a valve body movable to control an amount of fluid supplied to the first and second outlet. The fuel metering system includes a servo valve fluidly coupled to the second inlet and to a second source of fluid at a second pressure. The servo valve is in fluid communication with the second inlet and a body of the servo valve is movable to supply a fluid to move the valve body. The slot is configured to variably restrict the flow of the fluid through the second outlet to balance a force applied by a biasing member. The fuel metering system includes a fixed flow restriction downstream of the second outlet.

Abstract: A pilot relief valve is provided, including: a sleeve, a valve body, a piston, an adjusting member, a support base, a blocking member and an elastic member, all disposed inside the sleeve. The support base includes a head portion and a rod portion, the head portion includes an exhaust channel penetrating the first surface, the rod portion includes an air intake channel communicating with the exhaust channel. The blocking member is disposed on the head portion. As such, the air in the sleeve is discharged through the inside of the support base, and the hydraulic oil fills the sleeve to maintain pressure balance so that the support base and the blocking member will not thrust, the perforation of the valve body and the outlet of the tipping valve remains unblocked, and the pressure of the hydraulic oil is stable when the hydraulic oil enters the hydraulic cylinder.

Abstract: A method of managing a fluid flow within a conduit includes determining a presence of a flow blockage within the conduit, the conduit being equipped with an expandable device, controlling an electric actuator to flow a current to the expandable device to expand the expandable device radially, compacting the flow blockage radially along a length of the expandable device to create a channel adjacent the flow blockage, controlling the electric actuator to terminate a flow of the current to the expandable device to collapse the expandable device radially, and exposing the channel to open the conduit to fluid flow.

Abstract: A fluidic valve may include an inlet, a control port, an additional control port, an outlet, a fluid channel configured to convey fluid from the inlet to the outlet, and a piston that includes (1) a restricting gate transmission element configured to block, when the piston is in a first position, the fluid channel and unblock, when the piston is in a second position, the fluid channel, (2) a controlling gate transmission element configured to interface with a control pressure from the control port that forces the piston towards the first position when applied to the controlling gate transmission element, and (3) an additional controlling gate transmission element configured to interface with an additional control pressure from the additional control port that forces the piston towards the second position when applied to the additional controlling gate transmission element. Various other related devices, systems, and methods are also disclosed.

Abstract: A control line stabilizer includes a body defining an inlet chamber, an outlet chamber, a passageway connecting the inlet chamber and the outlet chamber, a first seat, and a second seat. A disc is disposed in the passageway and is movable between a first closed position, in which the disc engages the first seat, an open position, in which the disc is spaced away from the first seat and the second seat, and a second closed position in which the disc engages the second seat. A first spring is disposed in the outlet chamber and is operatively coupled to the disc. A second spring is disposed in the inlet chamber and is operatively coupled to the disc. The disc restricts fluid flow through the passageway by moving to the first closed position and by moving to the second closed position.

Abstract: A pressure regulating valve for an air supply system of a utility vehicle includes a housing having at least one compressed air connection communicating with at least one first pressure regulating chamber. The pressure regulating chamber has a variable volume delimited by at least one wall section of the housing and a first active pneumatic surface of a pressure regulating piston. In first position of the pressure regulating piston a first regulating channel is not connected to the pressure regulating chamber, and a second position of the pressure regulating piston is connected to the pressure regulating chamber. The pressure regulating piston includes a pin which rises out of the first active pneumatic surface of the pressure regulating piston. A second active pneumatic surface is located on an end of the pin. The pin is movably guided through the wall section in a pneumatically sealed manner.

Abstract: Setting device for a pressure regulator includes a tubular casing developing according to a longitudinal axis (X) and in which there are a movable body, a sliding setting plate and a spring interposed between them; an adjusting unit suited to adjust the position of the setting plate and having a first rotating shaft connected to the setting plate through a screw mechanism which converts opposite rotations of the first shaft into corresponding opposite movements of the setting plate along the longitudinal axis (X), and an electric motor powered by a control device and provided with a second shaft constrained to the first shaft. The control device includes two different input lines to receive corresponding electric signals and an output line to supply power to the electric motor and is configured to transmit an electric pulse emitted by any of the input lines to the output line with polarity depending on the input line which emitted the electric pulse.

Abstract: A vacuum large-capacity electrically controlled proportional valve includes a main body having a valve bottom seat, a middle valve seat, and a guide seat and has a vacuum pressure chamber, in which a main diaphragm is arranged with an elastic element provided thereon to connect with the guide seat. A pilot discharge straight rod is fit to a center of the main diaphragm. The main body includes a master channel connected to a guide channel and a feedback channel Provided above the guide seat are a vacuum pressure electromagnetic valve, an atmospheric pressure electromagnetic valve, and a sensor. The guide seat includes a regulation channel connected to the vacuum pressure chamber. A pilot atmosphere channel is connected to a space under the main diaphragm. A first and a second vacuum destruction valve gates are provided and driven by an external atmospheric pressure for speeding up decrease of interior vacuum level.

Abstract: A vacuum electrically controlled proportional valve includes a valve seat coupled to a guide seat. The guide seat is connected, at a top thereof, to a vacuum pressure electromagnetic valve, an atmospheric pressure electromagnetic valve, and a sensor. A main diaphragm is sandwich between the seat valve and the guide seat to define a vacuum pressure chamber. A pilot discharge straight rod that is provided with a vacuum valve gate assembly is fit to a center of the main diaphragm. A master channel through which a primary-side pressure and a secondary-side pressure flow is provided. A regulation channel is provided and controlled by the vacuum pressure electromagnetic valve and the atmospheric pressure electromagnetic valve. A pilot atmosphere channel is connected to a space under the main diaphragm. A first and a second vacuum destruction valve gates are provided for adjusting, in stage-wise manner, the level of vacuum pressure.

Abstract: A pilot type switching valve includes: a housing bore formed in a valve body, the housing bore having an opening end; a spool slidably housed in the housing bore, the spool being configured to allow or block a flow of the working fluid to a first relief valve; a pilot chamber to which pilot pressure biasing the spool in the valve opening direction is guided; and a spring configured to bias the spool in the valve closing direction. The spool has a bottom surface on which the pilot pressure acts in such a manner that the spool is biased in the valve opening direction, and the area of the bottom surface is smaller than the sectional area of the housing bore.

Abstract: Pressure relief valves may be tapped into high-pressure flow lines. The pressure relief valve is normally shut and is adapted to open at a threshold fluid pressure. It comprises a body, a passage, a valve seat, a ball, and a linear actuator. The passage is defined in the body and has a valve inlet and a valve outlet. The valve seat is in the passage. The ball is adapted to engage the valve seat to block flow through the passage. The linear actuator is mounted for linear movement in response to detection of the threshold pressure a from a normally extended position to a retracted position. In the extended position the ball engages the valve seat to close the passage, thereby shutting the valve. In the retracted position the ball can be flushed out of the valve by fluid flowing through the passage, thereby opening the valve.

Abstract: An example valve includes: (i) a housing defining a first longitudinal cavity therein; (ii) a sleeve disposed in the first longitudinal cavity coaxial with the housing, where the sleeve defines (a) a first port at an end of the sleeve, (b) a second port disposed on an exterior peripheral surface of the sleeve, and (c) a second longitudinal cavity therein, where an interior peripheral surface of the sleeve defines a first portion that is tapered at a particular angle and a second portion adjacent to the first portion, where the second portion has two edges forming a corner that defines a seat; and (iii) a poppet mounted within the second longitudinal cavity and configured to move axially therein.

Abstract: Provided is a relief valve with an inlet, and outlet, and a backside of a poppet fluidly connected to an input pressure to increasingly close the poppet as a function of input pressure until a prescribed pressure condition is reached. Upon the prescribed pressure condition being reached, the relief valve decreases pressure on the backside of the poppet to open the poppet and allow fluid flow from the inlet to the outlet. Increasingly closing the poppet allows the relief valve to operate under high pressure conditions and repeatedly open and close to reliable seal without significant leakage after thousands of cycles.

Abstract: A method of stopping an engine of a rotorcraft in overspeed, the engine comprising a gas generator and a power assembly. When the engine is in operation, a relationship is established giving a limit derivative that varies as a function of the speed of rotation of the power assembly. The speed of rotation, referred to as the “current speed”, reached by the power assembly is measured and the time derivative of the speed of rotation is determined and referred to as the “current derivative”. The engine is stopped automatically when the limit derivative corresponding to the current speed as determined by the relationship is less than or equal to the current derivative.

Abstract: A method for piloting a pressure regulator for an operative gas, the pressure regulator having a flow duct for the operative gas; a shutter causing a pressure drop in the operative gas, from a feeding pressure to a delivery pressure; a motorisation chamber delimited by a first movable wall associated with the shutter so that an increase in the delivery pressure causes a narrowing of the shutter; an elastic element exerting on a first movable wall a force directed to counteract the pressure force exerted by the operative gas on the first movable wall and widening the shutter; a compensation chamber housing a compensation gas and at least partially delimited by a second movable wall connected to the shutter to enable transferring on it the pressure force of the compensation gas, the method including the operation of regulating, moment by moment, the pressure of the compensation gas as a function of the delivery pressure.

Abstract: A valve includes a housing, in which a first valve body is accommodated so that it is moveable in a direction of a longitudinal axis, a first valve seat configured to be closed by the first valve body and arranged on the housing, a first fluid flow path extending from a first connection via the first valve seat to a second connection, a second valve seat closeable by a moveable second valve body, the second valve body formed separately from the first valve body, a second fluid flow path extending from the first connection via a bypass duct in the first valve body, onwards via the second valve seat to the second connection, so that pressure at the first connection is limited upwardly by the first and the second valve body in that hydraulic fluid is led to the second connection via the first fluid flow path.

Abstract: A fluid pressure control device includes a first control valve that switches to supply a working fluid to the pressure chamber of a cylinder on which a load pressure by the load acts so as to control the extension operation of the cylinder, a second control valve that switches to discharge the working fluid in the pressure chamber so as to control the contraction operation of the cylinder, an operate check valve that is interposed between the pressure chamber and the second control valve and that interrupts the discharge of the working fluid from the pressure chamber when the operate check valve is switched to a closed state and a pilot valve that performs, with a pilot pressure, a pilot operation on the second control valve and that switches, with the pilot pressure, the operate check valve to an opened state.

Abstract: A fluid regulating device includes a regulator valve, an actuator and a pilot regulator valve assembly. The pilot regulator valve assembly provides a pressure load to a surface of a diaphragm of the actuator in response to changes in downstream pressure being applied to the opposite surface of the diaphragm. An upper cavity of the pilot regulator valve assembly is in fluid communication with a control cavity of the actuator, allowing both the actuator diaphragm and the pilot regulator valve assembly diaphragm to simultaneously sense pressure variations within the cavities. As the downstream pressure varies, the diaphragms of both the actuator and the pilot regulator valve assembly displace to regulate the downstream pressure and the pilot regulator valve assembly maintains a load pressure. The regulator further includes a balanced regulator valve applying a balancing force to offset a force of upstream pressure on a balanced valve plug.

Abstract: A system and method for automatically performing start-up and overpressure relief functions in association with a primary fluid carrier such as, for example, a liquid handling pipeline or tank. The system includes a main valve for primarily exhausting air from the system as it fills with a liquid. A start-up pilot device is also provided for exhausting air from the system upon start-up, but prior to the main valve opening. Finally, an overpressure pilot device is provided to relieve overpressure situations during normal operation.

Abstract: A modular hydraulic control valve assembly for use in a pilot-operated hydraulic control system comprises, in one embodiment, a control valve including a valve body defining a main flow passage from an inlet on a high pressure side of the control valve to an outlet on a low pressure side of the control valve, a valve member arranged in the flow passage and separating the high pressure side from the low pressure side, a control chamber comprising means for hydraulic actuation of the valve member by applying a control pressure to the control chamber so as to position the valve member between an open position and a closed position thereby adjusting a main flow through the main flow passage in response to the control pressure, a feed port for feeding fluid to the control chamber to increase the control pressure therein, a bleed port for bleeding fluid from the control chamber to decrease the control pressure therein, and a valve bonnet closing the control chamber.

Abstract: A heater assembly can be used with a gas appliance. The gas appliance can be a dual fuel appliance for use with one of a first fuel type or a second fuel type different than the first. The heater assembly can include a fuel regulator valve including a main pressure regulator to regulate the fuel pressure, at least one auxiliary pressure regulator, a first fuel source connection for connecting the first fuel type to the heater assembly, and a second fuel source connection for connecting the second fuel type to the heater assembly. The one or more auxiliary pressure regulators introduce a backline pressure to the main pressure regulator, thereby adjusting the fuel pressure to fall within a predetermined range.

Abstract: A bypass valve assembly for use with a multi-speed pool pump is disclosed. The bypass valve assembly includes a housing having a inlet port, a high-pressure (HP) with a HP canal opening between the inlet port and the HP port, and a low-pressure (LP) port with a LP canal opening between the inlet port and the LP port. The bypass valve assembly also includes a HP valve assembly within the housing. The HP valve assembly includes a high-pressure seal movable between a HP sealed position responsive to a LP head and a HP open position responsive to a LP head. The bypass valve assembly also includes a LP valve assembly comprising a LP seal movable between a LP sealed position that seals the LP canal opening responsive to a HP head and a LP open position responsive to a LP head.

Abstract: A valve assembly for an air flow system, where the air flow system has a turbocharger unit and a venturi valve member for receiving a portion of the pressurized air from the turbocharger unit, and generating back pressure. The valve assembly includes a bypass switching valve and a bypass check valve. During a first mode of operation, the valve assembly is exposed to vacuum pressure, and the bypass check valve is exposed to the vacuum pressure such that the bypass check valve is placed in a closed position. During a second mode of operation the turbocharger unit is activated, pressurized air flows through the bypass switching valve, and places the bypass check valve in an open position, and the back pressure generated by the venturi valve member and the pressurized air from the turbocharger unit creates a pressure differential in the bypass check valve.

Abstract: A valve assembly includes a valve including an inlet and an outlet, and a soft start valve in a normally closed position and located upstream of the valve. The soft start valve opens when a percentage of an outlet pressure at the outlet of the valve to an inlet pressure of the inlet of the valve reaches a predetermined percentage to allow fluid to flow through the soft start valve to the valve.

Abstract: A valve for enabling communication between a first pressure and a second pressure including a piston member arranged in a housing. The piston member is movable between an open configuration and a closed configuration for selectively enabling communication between the first and second pressures. A control assembly is included for moving the valve to the open configuration. A first net pressure area is exposed to the first pressure and operatively arranged to urge the valve in a closing direction in response to the first pressure when the valve is in a closed configuration. A second net pressure area is exposed to the second pressure and operatively arranged to urge the valve in the closing direction in response to the second pressure when the valve is in a closed configuration. A method of operating a valve system is also included.

Abstract: Valve module for influencing a fluid supply of a fluid-operated load, comprising a valve housing with a valve chamber being connected to an inlet port and an outlet port and a pilot chamber being connected to an operating port, comprising a valve member which is movably adjustable between a blocking position and a release position and further comprising an actuator which is motion-coupled to the valve member, wherein a position of the actuator and the valve member can be set as a function of a pressure applied to the pilot chamber, and further comprising a sensor device for detecting a position of the valve member and/or the actuator along a movement axis, and the sensor device comprises an electric coil arrangement which forms a ring around at least one fluid port from the group comprising the operating port, the inlet port and the outlet port.

Abstract: An internal pilot type pressure regulator 10 reduces a pressure of compressed air supplied to a primary port 11 and causes it to flow out to a secondary port 12. The pressure of air which flows into the secondary port 12 is set by rotating a handle 61 so as to adjust a spring force which is added to a pilot diaphragm 49. When a bonnet 47, into which the pilot diaphragm 49 and a pressure regulating member 59 are incorporated, is inserted in a pressure regulating adapter 28 and then rotated, an outward projecting portion 71 abuts on an inward projecting portion 73 and is mounted. When a lock member 77 is inserted between the outward projecting portion 71 and the inward projecting portion 73, the pressure regulating adapter 28 is locked.

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 fuel metering unit (FMU) comprising a metering valve operable to control the supply of fuel to a delivery chamber of a pressure raising valve (PRV), the PRV including a valve member movable under the influence of the pressure within the delivery chamber between a closed position and an open position in which fuel is able to flow from the delivery chamber to an outlet port, and a push piston movable under the influence of the pressure within a control chamber to urge the valve member towards its open position, wherein the control chamber communicates with a valve control port.

Abstract: A pilot operated pressure relief valve includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. A valve plug may be disposed within the fluid passageway, the valve plug cooperating with a valve seat to control fluid flow through the fluid passageway. An actuator may be connected to the valve plug, the regulator biasing the valve plug towards the valve seat. A pilot assembly may include a first pilot valve and a second pilot valve, wherein the pilot assembly directs fluid pressure upstream of the valve plug to one of the first and second pilot valves. When the upstream fluid pressure exceeds a predetermined level, the valve plug moves away from the valve seat allowing fluid to flow through the fluid passageway.

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

Abstract: A system can include one or more valve arrangements with a working chamber to receive a working fluid at a first pressure, and a control chamber to receive fluid at a second pressure. A dynamic seal can be disposed on a land of a valve element. The valve arrangement may include a sleeve against which the dynamic seal is slidably engaged. The valve element may include a check stem. A pressure compensating system may be in communication with bores formed in with the valve element. A pressure system to monitor dynamic seal wear may be in communication with the control chamber of the valve arrangement.

Abstract: A system can include one or more valve arrangements with a working chamber to receive a working fluid at a first pressure, and a control chamber to receive fluid at a second pressure. A dynamic seal can be disposed on a land of a valve element. A supply passage can be in communication between the control chamber and a tank and can include a check valve. A relief valve can be disposed between the check valve and the control chamber. A pilot pump and another relief valve may be disposed upstream of the check valve. The relief valve downstream of the check valve can have a higher pressure limit than the downstream one. A pressure sensor may be disposed between the check valve and the control chamber and used to warn the operator of a high pressure in the control chamber.

Abstract: A gas supply system includes a receiver assembly, a gas storage vessel coupled to the receiver assembly, a main poppet positioned at an end of the gas storage vessel and sealing the gas storage vessel when the main poppet is closed, a pilot poppet positioned in the main poppet and sealing the gas storage vessel when the pilot poppet is closed, and a chamber positioned behind the main poppet, wherein when the pilot poppet opens, gas from the gas storage vessel is released into the chamber to exert pressure on the main poppet to open the main poppet.

Abstract: A diaphragm-type control valve having a diaphragm and a valve body is provided preferably for use in the separation of and fluid control between a fluid source and a pressurized gas volume. The diaphragm element and a port in the body together form an intermediate chamber that eliminates the need for a check-valve downstream of the valve. In one preferred embodiment, an inner surface of the valve body defines a chamber having an inlet and an outlet in communication with the chamber, and an elongated seat member defining a groove in communication with the port. A diaphragm member having upper and lower surfaces is disposed within the chamber. The lower surface preferably includes a pair of spaced apart elongated members defining a channel therebetween. The diaphragm member engages the seat member placing the channel in communication with the groove to define an air seat in communication with the port.

Abstract: A high temperature servo valve to control a valve actuator for a valve body in a valve passage includes a plurality of high temperature wires to deliver a voltage; an actuator block of piezo ceramic material connected to the plurality of high temperature wires to move when it receives the voltage; a pressure supply line connecting the servo valve to the valve passage to supply air to the servo valve; a pressure vent line to vent pressure from the servo valve; and a pressure servo line connecting to the valve actuator to control the pressure in the valve actuator.

Abstract: A hydraulic control system includes an oil control valve to control oil flow within a valvetrain. The control valve varies the flow rate to actuate an engine component from a first position to a second position based upon fluid pressure from the control valve. Varying the flow rate through the control valve includes increasing the flow rate through the control valve to increase the pressure to a first level to actuate the engine component to the first position. After the engine component is actuated, the flow rate through the control valve is maintained at a level sufficient to maintain the engine component in the first position. To actuate the engine component to the second position the flow rate through the control valve is then decreased. The fluid flow rate through the control valve is then maintained at a level sufficient to maintain the engine component in the second position.

Abstract: An apparatus for regulating the flow of a fluid from a source to a target location comprises a housing defining a fluid inlet configured to communicate with a fluid source and a fluid outlet configured to communicate with a target location, and a flow path extending between the fluid inlet and fluid outlet. An inlet valve assembly is mounted in the flow path and comprises a valve seat and a valve member configured to cooperate with the valve seat to regulate flow through the flow path. A balance arrangement is provided and is configured to balance the effect of fluid pressure acting on the inlet valve assembly.

Abstract: A valve assembly is provided that is suitable for use as an air release valve. The valve mechanism is actuated by liquid forced through an orifice by a diaphragm under pressure from the main discharge and is less prone to valve chatter under varying pressure conditions. The use of an externally adjustable orifice and/or regulator allows the valve assembly to operate satisfactorily in a wide range of pressures. The mode of operation of the valve mechanism is externally visible.

Abstract: Provided is a flow control valve including a valve body including a flow path, a first poppet fixed in the valve body including an inlet through which a fluid flows in, and an outflow hole through which the fluid flows out to the flow path of the valve body, a second poppet fixed in the valve body including an outlet through which the fluid flows out, and an inflow hole through which the fluid flows in from the flow path of the valve body, a sleeve to adjust an area of the outflow hole, a spool formed to slide along an external surface of the second poppet, and bellows of which one end is coupled with the first poppet and the other end is coupled with the spool.

Abstract: An adjustable hydraulically operated pressure management control pilot assembly has first and second diaphragm assemblies which define two fluid pressure chambers. Varying the pressure between these two fluid chambers modulates the control pilot assembly between adjusted low and high set points, which can be used to control high and low pressures downstream of a pressure reducing valve of a water supply system.