Abstract: A rivet-type flapper valve assembly for a fluid device has a main body part defining a valve orifice communicating with the fluid device. The main body part includes a pin or shaft of a rivet spaced adjacent to the valve orifice. The main body part is permanently attached to the fluid device, such as by brazing. A flapper valve is then mounted on the rivet shaft to cover the valve orifice, and the rivet shaft is deformed to retain the flapper valve in place.

Abstract: The present disclosure is directed to a flow control device, such as a regulator, for controlling fluid flow between an inlet port and an outlet port, and having an internal adjustment mechanism for varying the outlet pressure of the device, including the pressure required to close the device. The device may include first and second components, such as a body and a bonnet, demountably attached to form a housing of the device and defining an internal device cavity. A piston is disposed and movable within the device cavity, and in fluid sealing relationship with the inner surface of the device cavity. The components and the piston are configured to define a channel within the device cavity placing the inlet port in fluid communication with the outlet port, and with the piston being movable between a closed position preventing fluid flow and an open position allowing fluid flow to the outlet port.

Abstract: A hydraulic system having at least one hydraulic valve for actuating a component, wherein a control pressure acting on the hydraulic valve can be activated through a supply pressure of a pilot circuit having at least one actuator. At least one pressure reduction apparatus is connected in series with the actuator.

Abstract: There is disclosed a variable metering orifice arrangement for a current divider and current adding device, the metering orifice arrangement including one or more working terminals by each of which a consumer can be supplied with pressure fluid. The metering orifice arrangement includes a metering orifice piston to which control pressure tapped off between two throttles of a pressure divider can be applied, wherein at least one of the throttles is variable.

Abstract: An adsorbent fractionator directional flow control valve assembly includes two inlet check poppet valves, two outlet check poppet valves, and a valve body. The valve assembly controls the directional flow of an influent gas mixture into one of two vertical desiccant tanks of an adsorbent fractionator, or desiccant dryer, and an effluent gas flowing in reverse through the opposite desiccant tank. The valve body is a single unitary piece, which may be a casting, and couples the inlet check poppet valves and the outlet check poppet valves, which may be four identical valve subassemblies, providing flow communication between these and an inlet port, two exit ports, and an outlet port.

Abstract: Methods and systems are provided for predicting internal sound pressure within a flow passage, by measuring a vibration velocity response of a wall of the flow passage, for example, using accelerometers. A radiation model may then be used for predicting externally radiated sound pressure to provide feedback to control a process control system. Methods and systems are also provided for predicting externally radiated sound pressure based on internally-mounted pressure transducer sensor data.

Abstract: A safety valve is positioned in supply plumbing that supplies a fluid medium such as natural gas to a point of use structure such as a home. A mechanical actuator is provided remote from the safety valve but mechanically connected to the safety valve. This allows the actuator to be positioned, for example, directly on the point of use structure, avoiding the need for separate bracing for the valve. The valve can be provided with a tee fitting or can be a separate gate valve. The mechanical actuator can be actuated by seismic disturbance, manually, or by activation by remote sensor or home security system.

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: An animal watering valve has an elastomeric diaphragm disposed in a bore of a housing upstream of a valve seat and having apertures formed therethrough for the passage of water. A valve stem has a head clamped between the diaphragm and the valve seat and a tail that is laterally deflectable to move the valve stem head relative to the diaphragm from a seated position. Upon moving it to an unseated position, the valve stem head pivots relative to the valve seat to permit water to flow out of the valve. At least portions of the flow aperture outlets in the diaphragm are located radially inwardly of and axially upstream of the upstream surface of the valve stem head.

Abstract: A multiple-input gas adjuster includes a case having a chamber therein, an input channel, an output channel communicated with the chamber, a first input bore and a second input bore communicated with the input channel and the chamber. A pressure adjusting mechanism has a film assembly, a movable shaft to be reciprocated by the film assembly, a swing device pivoted in the case with an end thereof connected to the movable shaft and an opposite end for sealing the second input bore, and a driving device received in the first input bore and connected to the movable shaft for reciprocation to seal the first input bore. High pressure gas may flows into the first and second input bores through the input channel for pressure adjusting operation. With the action of the pressure adjusting mechanism, the present invention provides a well pressure reducing and stabilizing performance.

Abstract: An improved bulk fluid distribution for supplying process fluids to semiconductor process tools. The improved system having an alternating pressure vessel engine substantially eliminates pressure fluctuations in the bulk fluid supply line due to head losses from the changing weight of the fluid in the dispensing vessels. The system also enables flexible control of the flow conditions of the fluid in the fluid supply line.

Abstract: In the direct-acting valve of the present invention, no flange is formed in the valve box and the piping is achieved by interposing the valve box between pipe flanges. The direct acting valve includes: a driving section that operates by sensing a primary pressure or a secondary pressure; and a valve body communicating with the driving section to open and close a flow path. A valve box of the valve is positioned between pipe flanges tightened by bolts and nuts. Connecting end portions to be mated with pipe flanges respectively have an inlet and an outlet of the flow path, and each of the end portions is formed to have a smaller diameter than that of the pipe flange. A cover flange neck is extended upward from the valve box is formed so as to be interposed between the bolts B and B1 which are provided between the pipe flanges and adjacent to each other on the circumference of the pipe flanges.

Abstract: The present invention provides devices and methods for micro-scale simulated moving bed chromatography (SMB) for continuous preparation of analytic quantities of highly pure fractions of target molecules. The present apparatus and method of the invention is adapted in a preferred embodiment to separations by affinity chromatography involving three discontinuous liquid flow loops. An alternative embodiment of affinity chromatography utilizes standard SMB operating under isocratic conditions.

Abstract: Disclosed is an electrically controllable valve accommodating in its valve housing (4) a second valve member (6) that is operable by the first valve member (2) in order to be able to variably adjust a second valve opening cross-section (A2) that is arranged in series to the first valve opening cross-section (A1), and a third valve opening cross-section (A3) that is releasable by means of the first valve member (2) is positioned in series arrangement to the first valve opening cross-section (A1) in order to limit the hydraulic pressure to a mechanically preset value.

Abstract: A one-piece gas pressure regulator, comprising a main body having a first threaded port at the bottom thereof for a threaded connection with a high-pressure gas bottle. An admission passage is formed above the first threaded port and extended to a hollow pressure chamber within the main body. The hollow pressure chamber has an escape channel for ejecting the gas via an output control element, wherein the main body includes a second threaded port having a greater diameter and is positioned above the hollow pressure chamber. The second threaded port is adapted to receive a cylindrical body. The inside of the cylindrical body is divided by a partition into an upper and a lower chamber. The partition has a through hole in the middle thereof. The upper chamber is adapted to receive a pressure detector while the lower chamber is used to receive a pressure-adjusting element. The through hole is formed in such a way that a connecting head of a pressure detector is extended into the through hole.

Abstract: A gas supply facility includes a plurality of pressure type flow controllers connected in parallel, and a first controller to control operation of the plurality of pressure type flow controllers so as to supply a desired gas exhausted by a vacuum pump to a chamber while controlling its flow rate, one of the pressure type flow controllers operates as a second controller to control the gas flow rate range up to 10% of the maximum flow rate supplied to the chamber, while the remaining pressure type flow controllers are made to be ones that control the rest of the gas flow rate range. Furthermore, pressure inside the chamber is controlled by installing a pressure detector in the chamber, inputting the value detected by the detector to the controller, and by adjusting a control signal to the pressure type flow controllers.

Abstract: Apparatus for establishing and controlling a low pressure gas mixture in a vacuum enclosure (8) comprises at least one secondary pump (9) of the molecular, turbomolecular, or hybrid type, followed by at least one primary pump (10), with first control and adjustment means (22) such as a regulation valve (24) for controlling and adjusting the total gas pressure of the mixture of gases in the vacuum enclosure (8) as a function of a total pressure setpoint (27). The apparatus further comprises second control and adjustment means (28) such as a second regulation valve (29a) downstream from the secondary pump (9). The second regulation valve (29a) is controlled as a function of a delivery pressure setpoint (32) to modify the delivery pressure of the secondary pump (9) and thus to adapt its pumping capacity in selective manner.

Abstract: The invention concerns a hydraulic connector (140) forming a distributor or manifold for a hydraulic circuit of a fluid purification system (100) having a purified fluid inlet (142) and three outlets (143, 144, 145), characterized in that the inlet (142) is connected directly to a first outlet (143) of the three outlets by a pipe and in that a second pipe (141) is hydraulically connected to the first pipe between said inlet (142) and said first outlet (143) and to a third pipe having two ends forming the other two outlets (144, 145) of the connector.

Abstract: A coupler for a faucet is disclosed which couples a first waterway component and a second waterway component, the coupler being an overmold component.

Abstract: A decouple check-relief valve for use in a hydraulic fluid circuit is provided that has a cylinder guide housing which travels during the check function of the valve. The cylindrical guide housing has a clearance parameter, allowing for the selection of an optimal check response time. A dampening disk is provided inside the cylindrical guide housing, traveling within the guide during the relief function of the valve. The dampening disk has a separate clearance parameter, allowing for the selection of an optimal dampening capacity and fluid circuit stability. As such, the check and relief clearance parameters are independent of each other to allow both the check and relief functions of the valve to be optimized.