Abstract: A check valve includes a housing formed with a valve hole through which fluid flows, a valve seat formed on the peripheral wall of the valve hole, a valve element disposed in the valve hole to be movable between a valve closed position where the valve element makes close contact with the valve seat to close the valve hole and a valve open position where the valve element moves away from the valve seat in the downstream direction to open the valve hole, a coil spring for biasing the valve element toward the valve closed position wherein the coil spring is larger in outer diameter than valve element, and a pressure acting portion provided to the coil spring so as to undergo the pressure of fluid.

Abstract: A generally cylindrical restrictor insert for containing an axially movable, apertured restrictive member, housed in a flow control distributor housing of an orifice expansion device used for bi-directionally-flowing pressurized fluid, with a housing passageway being closed off via an annular adaptor flange also having an internal filter, the restrictor insert having a central axial through bore with a plurality of adjoining bore portions defining a central bore cavity, the restrictor insert also having a leading portion, with a frusto-conical front end surface, and intermediate and trailing portions, the latter having a shoulder portion and an annular end face, the restrictive member being located and axially freely movable within a distributor housing central bore cavity, with the restrictor insert, in turn being located, via slip-fit insertion, in a distributor housing central passageway.

Abstract: A fluid flow control system that includes a fluid inlet to receive a flow of process fluid and a plurality of fluid outlets. The plurality of fluid outlets include a first fluid outlet and at least one second fluid outlet. The first fluid outlet provides a first predetermined portion of the flow of process fluid, and the at least one second fluid outlet provides the remaining portion of the flow of process fluid. In one embodiment, the control system includes a pressure transducer, first and second multipliers, and first and second flow controllers. The first multiplier multiplies a pressure signal received from the pressure transducer by a first setpoint to control a first flow controller that provides the first predetermined portion of the flow of process fluid. The second multiplier multiplies the pressure signal by a second setpoint to control a second flow controller that provides the remaining portion.

Abstract: The invention relates to a releasable non-return valve, in which a connection between a working chamber and a connector chamber may be closed by a non-return piston and opened by the opening movement of a release piston which may be pressurized with a release pressure. The non-return piston, discharge piston and release piston are arranged concentric to each other with the release shaft in the common valve axis. The valve has a cartridge embodiment with a non-return valve cartridge which may be inserted in the valve housing and a discharge valve cartridge independent of the non-return valve cartridge. The release shaft extends through the non-return piston with a sliding seal and engages behind the piston base by means of a stepped diameter for opening. The discharge piston is pressure compensated on both sides by pressurization with the working pressure.

Abstract: Provided is a relative pressure control system has a simple configuration, but enables accurate regulation of a division ratio of an operation gas, and concurrently makes it possible to securely drain the operation gas from an operation gas pipeline in case of emergency. The system includes a plurality of air operated valves of a normally open type that are connected to an operation gas pipeline supplied with an operation gas; pressure sensors that are series connected to the respective air operated valves and that detect output pressures of the respective air operated valves; a controller that controls operation pressures of the respective air operated valves in accordance with the pressures detected by the pressure sensors; and a hard interlock solenoid valve that correlates the plurality of air operated valves to one another so that at least one of the plurality of air operated valves is normally opened.

Abstract: A one-way valve allows air to be drawn from a collapsible, flexible, airtight bag using a vacuum source. When the vacuum source is removed, the one-way valve prevents air from re-entering the bag. The valve assembly comprises a base, a valve element supported by the base, and a cap fitted onto an end of the base that is disposed in the exterior of the bag. The base comprises a flange that is disposed in the interior of the bag and is joined to a peripheral area surrounding a hole in one wall of the bag. One surface of the flange has a series of concentric heat-concentrating circular beads for speeding up the conduction heat sealing operation by which the valve assembly is attached to the bag. The valve cap is provided with a circular wall that presses the diaphragm of the valve element against a circular bead on an annular seat formed on the base for supporting the valve element.

Abstract: A shunt valve assembly includes an electromechanical brake mechanism that locks a position of a pressure setting mechanism within a shunt valve assembly. The electromechanical brake can maintain the position of the pressure setting mechanism in the presence of a relatively strong magnetic field to maintain a set pressure differential within the shunt valve assembly. In certain cases, the shunt valve requires repositioning of the pressure setting mechanism within the shunt valve assembly to adjust a fluid flow rate through the shunt valve assembly. A clinician can activate an external controller to transmit a signal to the shunt valve assembly through magnetically coupled antennas between the controller and the shunt valve. The shunt valve assembly utilizes the signal to activate the braking mechanism and unlock the pressure setting mechanism. The clinician then operates the controller to non-invasively reposition the pressure setting mechanism and adjust the pressure at which the shunt valve opens.

Abstract: Provided is apparatus for controlling flow rate of gases used in semiconductor device by differential pressure by generating differential pressure in a fluid path. A differential pressure generation element generates pressure difference in the fluid path of gases used in semiconductor device fabrication, a pressure, sensor which is installed at a bypass of the fluid path detects the pressure difference, and a central processing unit (CPU) measures and controls a flow rate of the gases, thereby the present invention is capable of controlling the flow rate precisely and rapidly, and enhancing the degree of purity of the gases by the filtering function of the differential pressure generation element itself.

Abstract: A single lever faucet with spray, wherein two cold and hot water inlet holes, a water outlet hole and a through hole are defined in the bottom of the faucet body, and the water outlet hole is connected to a hollow threaded tube, and the through hole is connected to a connecting tube. One side of the peripheral of the faucet body is defined with a chamber and a controlling device, and in the top surface of the faucet body is formed an inserting groove that is connected to the through hole for inserting a discharging base. A tee joint member is mounted between the hollow threaded tube and the connecting tube, a valve room is defined in the tee joint member for installing a diverter valve, and the middle section of the tee joint member is connected to the hollow threaded tube, and the ends are connected to a spray gun and a guiding tube respectively. Therefore, by opening and closing the spray gun, the water that supplied to the spray gun and the water outlet tube can be changed automatically.

Abstract: To protect hydraulic assemblies, in particular to protect hydraulic brace systems, pressure relief valves 1 are used, the closing part 10 of which is formed by a piston 15, which is connected to the connection 4, and the valve spring retainer 12, which comprises said piston, is arranged displaceably thereon and accordingly has a cylindrical design. Between the connection 4, which is equipped with a blind hole 5 and radial bores 6, 7, and the displaceable closing part 10 and/or the correspondingly shaped valve spring retainer 12 a damping chamber 20 is formed, which is directly connected to the blind hole 5 and hence to the system pressure.

Abstract: Apparatus and method for delivery of dilute active fluid, e.g., to a downstream active fluid-consuming process unit of a semiconductor manufacturing plant. The delivery system includes an active fluid source, a diluent fluid source, a fluid flow metering device for dispensing of the active fluid at a predetermined flow rate, a mixer arranged to mix active gas from the active fluid source that is dispensed at such predetermined flow rate by the fluid flow metering device, with diluent fluid to form a diluted active fluid mixture, and a monitor arranged to measure concentration of active fluid in the diluted active fluid mixture, and responsively adjust the fluid flow metering device, to control the dispensing rate of the active fluid, and maintain a predetermined concentration of active fluid in the diluted active fluid mixture.

Abstract: A pressure loaded pilot valve system and method for a regulator valve is provided. The system includes a regulator valve connecting an inlet line to an outlet line, a servo control valve assembly, and a pilot valve assembly. A supply line is connected to the servo control valve, and a pilot loading pressure line connects the servo control valve to the pilot valve assembly An exhaust line connects the servo control valve to the outlet line, thereby avoiding waste, pollution, etc. associated with bleeding excess pilot pressure to the atmosphere.

Abstract: An exhaust system and a mini-exhaust static pressure controlling apparatus thereof for controlling a process area. The mini-exhaust static pressure controlling apparatus has an exhaust chamber and an auto release damping device. The exhaust chamber has an air inlet connected to the process area receiving air exhaust from the process area, and an air outlet venting the air exhaust. The auto release damping device has a diaphragm pre-stressed in an arc shape with a coefficient of elasticity and an adjusting device for applying a stress on the diaphragm to maintain the arc shape of the diaphragm, and is disposed on the exhaust chamber to control static pressure of the air exhaust in the exhaust chamber.

Abstract: Systems and methods for using a dual-path fluid routing system that uses a flow restriction device to enhance temperature and pressure control of fluid are provided. Systems and methods for using a setpoint pressure control system to accurately control the setpoint pressure of a regulator are also provided.

Abstract: A valve apparatus is small, and regulates a fuel amount by restricting a lift amount of a valve. A columnar portion is formed on a pump body. The columnar portion is inserted into a check valve and a washer formed with a protruding portion which protrudes outward from a flange portion, and the check valve and washer are attached or fixed to the pump body by subjecting a tip end of the columnar portion to thermal caulking or the like. An outer diameter of the protruding portion is set to be relatively smaller than an outer diameter of the flange portion such that when the check valve is sandwiched between the protruding portion and pump body, the check valve contacts an outer peripheral edge of the flange portion when the check valve opens. As a result, a lift amount of the valve can be restricted, and a flow rate of fuel passing through a passage can be maintained at a constant level.

Abstract: A pressure relief device is provided. The pressure relief device includes a sealing member and a low-pressure support member that is adapted to provide support to the sealing member when the sealing member is subject to a certain pressure differential. The low pressure support member includes an annular flange and at least one supporting projection. A cutting element is adapted to puncture the sealing member when the sealing member is subject to a predetermined pressure differential. The pressure relief device may further include a high pressure support member and safety heads forming a pre-torqued assembly. The supporting projection may optionally include an area of weakness either wholly within or on the periphery thereof.

Abstract: An umbrella valve includes an umbrella-valve body having a stem, a flexible umbrella, and a flange. The umbrella and the flange are each attached to, and extend radially outward from, the stem. The flange has at least one fluid passage. The umbrella valve can be placed in a valve housing having a sealing-surface portion. The umbrella, when the umbrella-valve body is placed in the valve housing, is pushed away from the sealing-surface portion under a forward fluid flow and is pushed against the sealing-surface portion under a reverse fluid flow. An umbrella-valve assembly includes the umbrella valve and the valve housing.

Abstract: A pressure relief valve (12) for relieving air pressure from a passenger compartment (14) of a vehicle (10) includes a base (18) having a peripheral portion (30). A central opening (42) extends through the peripheral portion (30). The pressure relief valve (12) also includes a plurality of flaps (74) for closing the central opening (42) of the base (18). Each flap (74) has an outer end (82) connected with the peripheral portion (30) of the base (18) and an inner end (80) that is movable relative to the peripheral portion (30) and the other flaps (74) for enabling airflow through the central opening (42). Each flap (74) has opposite surfaces (76 and 78) against which air pressure acts. Differential air pressure acts on the opposite surfaces (76 and 78) causing the flap (74) to move to enable airflow through the central opening (42).

Abstract: A low-power, wireless, inflatable bladder damper device for controlling the flow of air through an airflow channel, and a method of operation for the same. Rather than requiring power supply and/or control wiring for operation of a wireless damper device, a low-power inflatable bladder damper device that requires no external wiring for operation can be used. A completely wireless damper device can reduce the cost of installation of damping devices in airflow channels, as well as the complexity of installation, while at the same time providing improved control of airflow throughout an airflow system.

Abstract: A surge relief valve comprising a main valve body having a dome port and an inlet port. The inlet port is in fluid communication with a first fluid. The invention further includes a dome reservoir connected to the main valve body via the dome port and arranged to hold a second fluid, a piston located in the main valve body, the piston in fluid communication with the reservoir, and a dampening ring positioned around the circumference of the piston operatively arranged to dampen the piston, wherein the first fluid exerts an upward force on the piston, the second fluid exerts a downward force on the piston, and the piston is arranged to move in response to a differential in the upward and downward forces, wherein the first and second fluids are isolated from one another.