Abstract: A pressure regulator is disclosed having a body, a valve seat dividing a cavity of the body into first and second portions, and an end stop movable against a bias to selectively engage the valve seat and isolate the first and second portions. The pressure regulator may also have a first inlet port in the first portion, a first outlet port in the second portion and in fluid communication with the first portion via the valve seat, and a second inlet port in the second portion. The fuel system may also have a valve element in the second portion and movable against a spring bias based on a pressure difference between an open position and a restricted position against the end stop. The fuel system may additionally have an actuator biased to urge the valve element toward the second position and selectively actuated to move away from the valve element.

Abstract: Excess flow shutoff valve comprising a valve body, a valve plug, a partition, and an activation component where the valve plug, the partition, and activation component are disposed within the valve body. A suitable flow restriction is provided to create a pressure difference between the upstream end of the valve plug and the downstream end of the valve plug when fluid flows through the valve body. The pressure difference exceeds a target pressure difference needed to activate the activation component when fluid flow through the valve body is higher than a desired rate, and thereby closes the valve.

Abstract: A drain valve includes an inlet plenum, a first orifice downstream from the inlet plenum, a second orifice downstream from the first orifice, and a fluid passage between the first and second orifices. A piston having a first position and a second position has a first surface area exposed to the fluid passage when the piston is in the first and second positions and a second surface area exposed to the inlet plenum when the piston is in the second position.

Abstract: A flow control device is disclosed. The flow control device includes a solenoid, the solenoid including an armature. Also, a piston connected to the armature. The piston includes a primary orifice. The piston having an open position and a closed position. A piston spring connected to the piston is also includes and at least one secondary orifice. The movement of the piston to the open position at least partially opens the at least one secondary orifice and the movement of the piston to the closed position at least partially closes the at least one secondary orifice. The movement of the armature actuates the piston movement and controls fluid flow from the primary orifice through the at least one secondary orifice.

Abstract: A system for controlling a flow may be provided. The system may comprise a first flow controller and a gas density meter. The gas density meter may be in fluid communication with the first flow controller. The gas density meter may be configured to calculate a gas density for a first gas flowing through the gas density meter. In addition, the gas density meter may be configured to output a first signal configured to cause the first flow controller to alter a first flow rate of the first gas flowing through the first flow controller. Furthermore, the gas density meter may be configured to output a density signal going to the second controller.

Abstract: A fluid supply system includes a fluid supply source, a first valve unit, a second valve unit, a first pressure detector, a second pressure detector, a third pressure detector, and a controller. If the pressure detected by the third pressure detector is less than a shutoff pressure at a timing of starting supply of fluid from the fluid supply source, the controller calculates a pressure equalization time from a timing at which opening of a pilot valve is completed to a timing at which a main valve starts closing, based on the pressures detected by the first pressure detector, the second pressure detector and the third pressure detector, sets a valve-open waiting time based on the pressure equalization time, and controls opening of the second valve unit upon elapse of the valve-open waiting time after controlling opening of the first valve unit.

Abstract: A proportional throttle valve includes a valve piston (2) displaceably guided in the longitudinal direction in a valve housing (3) having a fluid inlet (4) and a fluid outlet (5) and pretensioned by an energy accumulator, in particular in the form a pressure spring, against a stroke stop (6) defining the closure position. A pressure limiting valve (7) is integrated in the proportional throttle valve (1). The side (8) of the valve piston (2) to allow the piston to move away from the stroke stop (6) in opposition to the pretensioning force when a predefinable pressure is exceeded at the fluid inlet (4).

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 manually operable gas regulator includes a knob, an upper cover, a return spring, a movable block, a pressure adjusting spring, a diaphragm assembly, a body, and a lever pivotably mounted to the body. An upper end of the diaphragm assembly abuts a lower end of the pressure adjusting spring whose upper end abuts a lower end of the movable block. An upper end of the movable block abuts a lower end of the movable block securely engaged with the upper cover and the knob. Rotation of the knob causes upward/downward movement of an axle of the diaphragm assembly to pivot the lever. A plug on an end of the lever is moved to accurately control the flow of gas and to accurately close or open an output end of an inlet passage of the body.

Abstract: A pressure regulator includes a housing assembly defining a main fluid flow path from an inlet end to an outlet end. A tubular plunger body is supported within the housing assembly for linear movement toward and away from a valve seat in response to fluid pressure at said outlet end. An actuator sleeve is supported within the housing assembly and engaged with the tubular plunger body, and a pressure chamber defined in part by a shut-off diaphragm extends between the housing assembly and the actuator sleeve. A fluid port is arranged to supply pressurized fluid to the pressure chamber to thereby produce linear movement of the actuator sleeve and the tubular plunger body independent of the pressure at said outlet end, moving the tubular plunger body into engagement with the valve seat to shut off the flow path.

Abstract: A pressure-regulating valve for regulating the pressure in a high-pressure fuel accumulator of an internal combustion engine, in particular in common-rail injection systems, with a valve piston (3) which is guided in an axially displaceable manner in a bore (1), is acted upon in the opening direction by the compressive force of a spring (2) and, when a magnet coil (4) is energized, undergoes an axial displacement in the direction of a first valve seat (5) counter to the compressive force of the spring (2) and counter to the pressure prevailing in the high-pressure fuel accumulator, wherein the valve piston acts on a valve-sealing element (6) which interacts with the valve seat (5).

Abstract: A pressure reducer having a high pressure inlet, a low-pressure outlet and a valve having a valve seat and a cooperating movable piston valve. With displacement of the piston valve away from the valve seat, a path between the high pressure inlet and the low pressure outlet is opened. In addition, a closing force caused by a low pressure acts on the piston valve towards the valve seat during operation of the pressure reducer. A spring is also provided for the purpose of exerting an actuating force on the piston valve to move away from the valve seat in the valve opening direction. A solenoid coil is configured to exercise a magnetic force superimposed on the closing force or the actuation force acting on the valve piston.

Abstract: A pressure regulator includes a housing assembly defining a fluid flow path from an inlet end to an outlet end; a plunger having a tubular plunger body supported within the housing assembly for linear movement toward and away from a valve seat in response to fluid pressure at the outlet end. A sleeve is supported within the housing assembly and is engageable with the tubular plunger body, and an actuator collar is supported externally of the housing assembly and operatively attached to the sleeve such that rotation of the actuator collar in one direction from an open position to a closed position produces linear movement of the tubular plunger body, independent of the pressure at the outlet end, into engagement with the valve seat to thereby shut off the flow path within the regulator.

Abstract: A quick-acting valve 1 having metering relief is used in particular for oxygen lances, wherein the actual sealing body 10 inside the valve tube 2 has a two-part design and accommodates the valve spring 8 with the housing parts 16 and 17 of the spring. The gas is conducted around the sealing body 10, so that the gas pressure cannot have an effect on the actuation by way of the hand lever 3. The rear housing part 17, which is located behind the front housing part 16 can be displaced inside the front housing part 16, and has a flow-promoting design, being displaced against the force of the valve spring 8, and specifically with the help of the hand lever 3, so that it now can be actuated independently of the gas pressure with precise metering control.

Abstract: Method and drill string valve for closing a conduit through which a high pressure fluid flows.

Abstract: A fluid pressure regulating apparatus is provided. The apparatus includes a chamber having a first bore diameter, a second bore diameter, a fluid inlet for receiving fluid at an unregulated pressure, and a fluid outlet for discharging fluid at a regulated pressure. A shuttle assembly is located in the chamber, the shuttle assembly including a valve that is in fluid communication with both the fluid inlet and the fluid outlet, and a first sealing member located at an upper portion of the shuttle assembly and a second sealing member located at a lower portion of the shuttle assembly. An unregulated pressure zone communicates with the fluid inlet, a regulated pressure zone communicates with the fluid outlet and a fluid pressure control zone communicates with a portion of the shuttle assembly, the fluid pressure control zone controlling the regulated pressure at the fluid outlet.

Abstract: A multifunction relief valve includes a relief chamber having an introduction port and a relief port for introducing and relieving pressure fluid; a back pressure chamber formed on one end side of the relief chamber; a piston which is movably provided in the back pressure chamber and divides the back pressure chamber into a first back pressure chamber and a second back pressure chamber; a first spring which is provided in the first back pressure chamber and exerts a biasing force in a direction in which the relief port is closed; a second spring which is provided in the second back pressure chamber and biases the piston in the direction in which the relief port is closed; and a pilot pressure supply port formed in the first back pressure chamber. The pressure fluid introduced into the first back pressure chamber via the pilot pressure supply port changes the relief pressure.

Abstract: A valve assembly for a fluid system is provided. The valve assembly includes a damping component to reduce undesired pressure fluctuations within the system. The valve assembly includes a valve guide member and a valve member at least partially situated around the valve guide member. The valve member may be slidable relative to the valve guide member. The valve member is configured to move between a first valve member position that substantially permits fluid flow from the fluid system through the valve assembly, and a second valve member position that substantially prevents fluid flow from the fluid system through the valve assembly. A metering hole is formed on the valve member and adapted to dampen the motion of the valve member from the first valve member position to the second valve member position.

Abstract: A control valve comprises a valve housing (1) having an inlet side (17) and an outlet side (18). The control valve also has a pressure maintaining arrangement for maintaining a constant differential pressure between the inlet and outlet sides, as well as an amount control arrangement for setting the maximum flow through the valve. A pair of cylinder shells located in the flow path have cooperating recesses which provide an uncovered area forming an opening (25). One cylinder shell is rotatable relative to the other cylinder shell by a rotatable handle (13), whereby a larger or smaller opening (25) between the cooperating cylinder shells may be provided. Both cylinder shells are axially displaceable within a seat hole (8), resulting in an increase or a decrease of the opening (25).

Abstract: A valve system enables use of a standard single line faucet with a water treatment system. The valve system may include a housing having ports for receiving untreated supply water, supplying water to a water treatment system, receiving treated water from the water treatment system and supplying treated water to a dispenser. The valve system includes an automatic shutoff device that prevents water from flowing into the water treatment system when the dispensing faucet is closed and allows water to flow into the water treatment system when the faucet is open. The valve system may include a pressure relief mechanism that removes pressure from the water treatment system when the faucet is closed and a check valve for maintaining a desired amount of pressure within the valve system.

Abstract: Disclosed are a fluid control system and method of controlling operating pressures within a fluid system, where the fluid control system includes a choke assembly, a pressure generating device, and a linear motor. The choke assembly may include a housing and a choke member adapted for movement in the housing, controlling the flow of a fluid from an inlet passage to an outlet passage. The fluid applies a force on a first end of the choke member. The pressure generating device may be fluidly connected to a chamber and may contain a control fluid that applies a first force on a second end of the choke member. The linear motor may apply a second force on the second end of the choke member. The difference between the forces applied to the first and second ends of the choke member may affect the movement of the choke member in the housing.

Abstract: A valve system enables use of a standard single line faucet with a water treatment system, protects water treatment systems and other fluid flow devices from unnecessary fluid pressure, and regulates or prevents fluid flow to a dispenser or outlet in response to a particular event, such as a leak. The valve system includes a housing having ports for: (1) receiving a supply fluid, (2) supplying the fluid to a device, such as a water treatment system, (3) receiving the fluid from the device and (4) supplying fluid to a dispenser. The valve system also includes an automatic shutoff device within the housing that prevents water from flowing into the housing and the water treatment system when the dispensing outlet is closed and that allows water to flow through the housing and into the water treatment system when the outlet is open. The valve system may also include a second actuator connected to the automatic shutoff that is capable of moving the automatic shutoff to a partially or fully closed position.

Abstract: A fluid pressure regulating apparatus is provided. The apparatus includes a chamber having a first bore diameter, a second bore diameter, a fluid inlet for receiving fluid at an unregulated pressure, and a fluid outlet for discharging fluid at a regulated pressure. A shuttle assembly is located in the chamber, the shuttle assembly including a valve that is in fluid communication with both the fluid inlet and the fluid outlet, and a first sealing member located at an upper portion of the shuttle assembly and a second sealing member located at a lower portion of the shuttle assembly. An unregulated pressure zone communicates with the fluid inlet, a regulated pressure zone communicates with the fluid outlet and a fluid pressure control zone communicates with a portion of the shuttle assembly, the fluid pressure control zone controlling the regulated pressure at the fluid outlet.

Abstract: Disclosed are apparatus and methodology for remotely shutting off gas flow at a consumer location. A gas pressure regulator is configured to respond to communication signals from a central facility via a communications infrastructure to override normal pressure regulation functions such that the gas pressure regulator outlet pressure is reduced to zero.

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

Abstract: A gas control valve is configured to controllably supply propellant gas to a thruster so that the thruster may produce thrust over a relatively wide range, and so that the thruster exhibits relatively fine minimum impulse bit (MIB) performance. The gas control valve includes a pilot stage having a pilot valve, and a main stage having a main valve. The gas control valve responds to control signals supplied to the pilot stage and is configured such that for commands of relatively short duration, only the pilot valve responds. Conversely, for commands of relatively longer duration, the pilot valve and main valve both respond.

Abstract: A solenoid valve for controlling a fluid has a first housing part (2), an axial guide (3), facing inwards, for an armature (4) which can be displaced in the axial guide (3) under the effect of a solenoid (5) that at least partially surrounds the exterior of the first housing part (2), a return spring (6) and a closing element (27) impacting a valve closing element (7), and a second housing part (9) which is arranged coaxially to the first housing part (2). The solenoid valve according to the invention is characterized in that the first housing part (2) has a reduced wall portion (17) which faces inwards towards the armature (4) and the second housing part (9) and which effects a magnetic separation of the two housing parts (2, 9) to at least some extent.

Abstract: A regulator valve includes a duct, a valve element, and an actuator. The duct has an inner surface defining a flow passage. The valve element is movably disposed within the flow passage between an open position, in which fluid is permitted to flow through the flow passage, and a closed position, in which fluid is restricted from flowing through the flow passage. The actuator is coupled to the valve element and at least facilitates movement thereof between the closed and open positions and locking of the valve element in an intermediate position therebetween. The actuator comprises a shaft and a locking system. The shaft is coupled to the valve element and moves therewith. The locking system is coupled to the shaft and is activated when the valve element is in the intermediate position, to thereby at least inhibit movement of the shaft and the valve element.

Abstract: A fluid flow regulator of the present invention comprises in combination a stationary hollow duct housing having a first end and a second end through which fluid flows. The device also incorporates a movable member aligned concentric with the duct having an end essentially similarly shaped and sized to the first end of the housing. The member may be spaced apart from the duct so that fluid can enter the duct housing through an opening defined by the space between the end of the member and the first end of the duct, with the movement of the member serving to change the size of opening. The movement of the member is controlled by the movement of a float located within the duct.

Abstract: A valve unit for controlling the delivery of a combustible gas, in particular for delivery via a gas metering apparatus including a main gas through-flow pipe (2), the unit comprising a servovalve with a first valve seat (3) provided on the pipe and associated with a respective first shutter (6) with diaphragm control (7) for the opening of the seat (3) in opposition to a first return spring (22), an operating chamber (10) for controlling the servovalve, the chamber being in communication with an inlet section (4) of the main pipe (2), upstream of the first valve seat (3), one side (7a) of the diaphragm (7) being subjected to the pressure prevailing in the chamber (10), the other side (7b) being subjected to the pressure prevailing downstream of the first valve seat, in the region of an outlet section (5) of the pipe (2), the operating chamber (10) being in communication with the outlet section (5) via a second valve seat (9) co-operating with a second shutter (8).

Abstract: A hydraulic fluid supply system includes an active pressure regulator or feed limit valve with a flow cut-off which may be used with dual clutch transmission hydraulic control systems. The supply system includes a pump, a filter, pressure relief and filter bypass valves, an accumulator, a system pressure sensor and the active feed limit valve. The active feed limit and flow cut-off valve includes an on-off solenoid valve and a spool or logic valve having an inlet port, an outlet port, a control port, a feedback port and an exhaust port. The inlet port is supplied with pressurized hydraulic fluid and the control port is supplied with hydraulic fluid from the solenoid control valve when it is energized. A valve spool having a pair of spaced-apart lands is biased toward the control port. One side of a check valve is in fluid communication with the feedback port.

Abstract: An assembly is for extremely fast opened lids systems, where compressed gases or liquids or oils are used. Mainly, the removable lid is comprised of a lid, a lid platform, a dynamic hinging mechanism, and a releasing mechanism. A final action could be via means of mechanical or electrical via an action of a solenoid.

Abstract: A bi-modal bleed valve assembly is provided. In one embodiment, the bi-modal bleed valve assembly includes a housing assembly having a bleed inlet, a bleed outlet, a control servo port, and a control chamber therein. A main flow control valve is fluidly coupled to the control chamber and configured to move between an open position and a closed position to regulate fluid flow from the bleed inlet to the bleed outlet. The main flow control valve is configured to move from an open position to a closed position when the pressure within the control chamber surpasses a predetermined threshold. A switching valve is fluidly coupled between the bleed inlet, the servo control port, and the control chamber. The switching valve is configured to route fluid flow into the control chamber from: (i) the bleed inlet in an autonomous mode, and (ii) the servo control port in a servo-controlled mode.

Abstract: Disclosed is a cylindrical, single-component two-stage regulator for controlling a pressure and a flow rate of a gas. The regulator includes a housing for holding the two stages having an ingress adapted for connection to a source of gas at a high input pressure and an egress adapted for supplying gas at a lower output pressure than the high input pressure; a first stage for reducing the pressure of the gas from the high input pressure to a fixed intermediate pressure; and a second stage for reducing the pressure of the gas from the fixed intermediate pressure to the lower output pressure and regulating the flow rate of the gas out of the egress. One application of the present invention is for use in scuba (Self-Contained Under-water Breathing Apparatus) applications, where it replaces the traditional two-component user-adjustable regulator. The regulator may be made out of stainless steel, and is small enough to fit into a user's mouthpiece.

Abstract: Disclosed is a cylindrical, single-component two-stage regulator for controlling a pressure and a flow rate of a gas. The regulator includes a housing for holding the two stages having an ingress adapted for connection to a source of gas at a high input pressure and an egress adapted for supplying gas at a lower output pressure than the high input pressure; a first stage for reducing the pressure of the gas from the high input pressure to a fixed intermediate pressure; and a second stage for reducing the pressure of the gas from the fixed intermediate pressure to the lower output pressure and regulating the flow rate of the gas out of the egress. One application of the present invention is for use in SCUBA (Self-Contained Underwater Breathing Apparatus) applications, where it replaces the traditional two-component user-adjustable regulator. The regulator may be made out of stainless steel, and is small enough to fit into a user's mouthpiece.

Abstract: A constant flow regulating valve of the type described in U.S. Pat. Nos. 6,026,850 and 6,209,578 includes a closure mechanism configured and arranged to override the modulating mode of the valve and to close the valve at fluid inlet pressures both below and above the valve's threshold level. The closure mechanism may be selectively deactivated to thereby allow the valve to assume its normal pressure responsive regulating functions. Embodiments of the regulating valve incorporate pressure relief devices and vent seals, with configurations suitable for incorporation into the trigger assemblies of portable sprayers.

Abstract: A gas pressure regulator comprises a main body having a first, gas inlet pipe and a second, gas outlet pipe, a calibrated gas passage through which gas flows from the first pipe to the second pipe, a shutter housed at least partially in the main body and mobile lengthwise along a first defined line to adjust the opening of the calibrated passage, a device for actuating the shutter and a regulator spring unit opposing the movement of the shutter.

Abstract: A grill that includes a base and, residing thereupon, a cooking surface in the form of a grate for supporting food to be cooked by the grill. A first removable drawer is positionable beneath the grate having at least one burner. A source of combustible fuel, such as a pressurized gas, is contained within a tank located within the base of the grill. A fuel line emanating from the pressurized tank terminates at a control valve having a first gas transmitting position facilitating the combustible fuel fed to the at least one burner and a second gas blocking position preventing the combustible fuel to be fed to the at least one burner. The control valve is capable of assuming the first gas transmitting position only if the first removable drawer has been fully positioned beneath the cooking surface. When an alternative drawer, such as one containing charcoal is employed, fuel from the pressurized tank is blocked from emanating from the tank.

Abstract: A method of controlling one or more operating pressures within a subterranean borehole that includes a choke assembly is disclosed. The choke assembly may include a housing having an inlet passage, an axial bore, and a chamber, wherein a portion of the axial bore forms an outlet passage, and a choke member adapted for movement in the housing to control the flow of a fluid from the inlet passage to the outlet passage. The method may include applying a closing force to move the choke member toward a closed position, and applying a bias force to the choke member when in the closed position to reduce an overpressure required to initiate movement of the choke member from the closed position.

Abstract: A device for regulating the delivery pressure of gases includes a valve unit having at least one valve seat and a respective closure element displaceable along an axis with respect to the valve seat which is controlled by a diaphragm. The device further includes a first spring which acts on the diaphragm in order to subject it to a preselected resilient load. A second spring is selectively activated to exert an additional resilient load on the diaphragm. The device includes a handle associated with the first and second springs in order to impose selectively the desired delivery pressure value, between a minimum value and a maximum value of pre-calibration, the pressure value being proportionally correlated with a predetermined resilient load exerted on the diaphragm.

Abstract: The invention relates to the metering of fluids at low flow rates. More particularly, the invention provides a flow regulator for flows as low as about ½ ml per hour, provided with locking means for any set value within its range. The flow regulator comprises: an inner non-revolving core element, an outer housing, having a hollow base section and being revolvably supported co-axially with the core element, first and second chambers disposed between the core element and the outer housing, each chamber having an inlet and an outlet, the outlet of the first chamber and the inlet of the second chamber being connected by a flow restriction path, a diaphragm separating the two chambers and sealing an inlet to a discharge tube when pressure in the first chamber is higher than pressure in the second chamber, and a circular spring placed in the secondary chamber below the diaphragm and around the discharge tube.

Abstract: A temperature-controlled valve allows the flow of water to be terminated automatically when the water flowing through the device reaches a specific temperature. The flow may thereafter be released automatically or manually, depending upon the application. The technology may be used in a variety of contexts, including, for example, stand-alone consumer or commercial valves, embedded applications, and custom-designed valves.

Abstract: Pressure regulator with partial volumes for regulating the operating pressure of fluids, in particular adhesives, at the inlet of a consuming device, the first partial volume (14) being connectable to a fluid source and the second partial volume (24) being connectable to the fluid inlet of the consuming device, wherein the second partial volume (24) has a cylindrical section(24a) of variable size, a connecting channel (22) connecting the first (14) and the second (24) partial volumes, a valve disposed in the first partial volume for opening and closing the connecting channel, said valve having an insert (23) and a movable sealing piston (32), the front end of which forms a sealing body (34) for closing the connecting channel and the rear end of which is sealed against the first partial volume.

Abstract: A breathing regulator having a non-linear positive pressure spring is provided for use in an air supplied respirator. The regulator includes a housing formed from a regulator body and a cover sub-assembly, a diaphragm assembly, and the non-linear spring. The spring holds the diaphragm assembly closed and resists the force applied by air pressure during exhalation by the user, but collapses once a sufficient amount of force has been applied, thereby permitting the user to exhale freely.

Abstract: A hydraulic control arrangement is disclosed for the load-independent control of a consumer with a continuously adjustable distribution valve having a pressure compensator down the line. According to the invention, the pressure compensator has a single-sided damping such that the movement in the opening direction is damped and the movement in the closing direction is substantially undamped. Furthermore, a control arrangement is disclosed in which a load-holding function is integrated in the pressure compensator.

Abstract: A temperature-type expansion valve 1 includes a valve housing 110 having a first passage 121 into which a high pressure refrigerant flows, a second passage 122 through which a low pressure refrigerant flowing to an evaporator 5 flows, and a throttle passage 125 communicating the first passage 121 with the second passage 122; a valve body 130 having a valve member 131 varying a sectional area of the throttle passage 125; and an operation rod 135 for driving the valve body 130 in the interlocking arrangement with a displacement member 160 undergoing displacement in accordance with a pressure difference between a saturation pressure corresponding to an outlet temperature of the refrigerant of the evaporator 5 and an evaporation pressure of the evaporator; wherein a slide hole 124 communicating with the throttle passage 125 and accommodating the valve body 130 is formed in the valve housing 110; and the valve member 131 moves inside the slide hole 124 in the interlocking arrangement with the operation rod 135 to

Abstract: In an electromagnetic valve, a valve member is slidably installed in a housing to open and close a valve hole. A moving core is slidably installed in the housing, and a coil generates a magnetomotive force to attract the moving core to one side when it is energized. The valve shaft links a motion of the moving core with a motion of the valve member. A bellows surrounds the valve shaft to form a cylindrical inner space between the valve shaft and itself. The bellows is subjected to both positive and negative pressures to extend and shrink in accordance with the motions of the valve member and the moving core. An inner volume of the inner space increasing and decreasing in accordance with extending and shrinking operations of the cylindrical bellows portion. The opening of the bellows and the valve shaft form a narrow opening passage.

Abstract: A one-way flow valve is provided wherein the one-way flow valve may comprise a first section and a second section of a housing. A valve member may be disposed between the first and second sections of the housing that permit fluid flow through one direction of the one-way flow valve but prevents fluid from flowing in the reverse direction. The opening pressure (i.e., the pressure differential across the valve member) to permit flow through the one-way flow valve may be increased or decreased by inserting (e.g., threadably engaging) the second section of the housing deeper into the first section of the housing or withdrawing (e.g., threadably disengaging) the second section of the housing from the first section of the housing.

Abstract: Modulating gas valves and systems for modulating gas flow to gas-fired appliances are disclosed. An illustrative modulating gas valve can include at least one main valve adapted to regulate the flow of gas through a main gas conduit, at least one regulator for regulating the gas pressure outputted by each main valve between a first gas pressure and a second gas pressure, and a modulator adapted to variably modulate the gas outputted by the gas valve at a pressure between the first and second gas pressures. The modulator can be used to modulate the main gas valve or valves between an infinite or discrete number of positions.

Abstract: An orifice assembly includes a sleeve and a rod. The sleeve has a first axial end, a second axial end, an outer surface, and a bore that extends through the first and second axial ends. The second axial end defines a first opening and a second opening that extend from the outer surface into the bore. The rod includes a first portion and a second portion that is adapted for linear sliding movement in the bore of the sleeve. The second portion includes an end that cooperates with the first and second openings in the sleeve to define a first variable orifice and a second variable orifice.