Abstract: A system for component interconnection for use in liquid chromatography includes a first switching valve and a second switching valve. A first connecting line fluidly connects the first switching valve to the second switching valve. A second connecting line fluidly connects the first switching valve to the second switching valve. A metering device is located in the first connecting line.

Abstract: An air delivery device (ADD) for applying fluid pressure pulses (FPP) to the mouth cavity of a patient at a predetermined frequency according to a protocol The ADD, comprises: a) an air blower for blowing air into a pressure chamber via a first opening (inlet); b) airflow occluding means (AOM) provided in fluid communication with said pressure chamber; said AOM located between said first opening and a second opening (outlet) of said pressure chamber; c) a patient mouthpiece or Face Mask, in fluid communication with said second opening (outlet); and, d) means for controlling AOM, adapted to interrupt and release said airflow at a predetermined frequency and pressure, thereby applying said FPPs to the mouth cavity of a patient according to a predetermined protocol during operation.

Abstract: A control valve (32) that has a valve (34) that moves in relation to a rigid pressure balancing component (33). The pressure balancing component (33) and the valve (34) are connected by a valve insert (47). The control valve (32) has a pressure balancing component (33) in order for a similar pressure to be applied to both the pressure balancing component (33) and the valve (32). Use of a rigid material will increase the durability of the pressure balancing component (33). The pressure balancing component (33) is formed as part of the actuator (31) or part of the armature (45).

Abstract: A mixed water control valve for a faucet includes a valve housing, a control unit, and a balance unit. The valve housing has a mounting seat which has a receiving chamber and two water inlet holes. The balance unit includes a fixed sleeve secured in the receiving chamber, a pressure regulating sleeve movably mounted in the fixed sleeve, a balance baffle mounted in the pressure regulating sleeve, and two elastic members each mounted in the pressure regulating sleeve and each biased between the balance baffle and the mounting seat. Thus, the balance baffle is compressed between the elastic members which provide a buffering force to counteract a larger pressure applied on the balance baffle, so that the pressure regulating sleeve is moved smoothly and stably without producing resonant noise in the faucet.

Abstract: A microvalve device for controlling the supply of pressurized fluid to a load in a fluid circuit, and having multiple internal fluid conduits for providing pressure feedback.

Abstract: A balance-plug cage style control valve has substantially reduced body-bonnet bolt loading with an elastic seal. The elastic seal assembly includes an annular seal having an elastic region, a compression surface, and at least one sealing surface positioned in a channel within a valve cage mounted inside the valve body. At least one shoulder on the valve bonnet engages the elastic seal to deform the elastic region to place the sealing surface of the seal in contact with at least one of the valve bonnet or the valve cage to form a fluid seal.

Abstract: In a direct injection type automatic sampler, a sampling needle having a liquid sample collected from a sample vessel by using suction force of a pump is inserted into an injection port. Then, a flow path-switching valve is rotated to switch a flow path to make a flow of mobile phase liquid pass through a loop to thereby introduce the collected sample into a column. The injection port is directly incorporated in the flow path-switching valve.

Abstract: A balance-plug cage style control valve has substantially reduced body-bonnet bolt loading with an elastic seal. The elastic seal assembly includes an annular seal having an elastic region, a compression surface, and at least one sealing surface positioned in a channel within a valve cage mounted inside the valve body. At least one shoulder on the valve bonnet engages the elastic seal to deform the elastic region to place the sealing surface of the seal in contact with at least one of the valve bonnet or the valve cage to form a fluid seal.

Abstract: A microvalve having a generally planar plate valve body defining a chamber and a plate valve member movable in the chamber about a pivot axis that is perpendicular to the valve body to control the flow of a fluid through the valve body. The plate valve member defines a pair of opposite faces, a first duct therethrough provides fluid communication between the opposite faces to equalize fluid pressures acting on the opposite faces in the region of the first duct. The plate valve member also has a second duct therethrough that provides fluid communication between the opposite faces to equalize fluid pressures acting on the opposite faces in the region of the second duct. The first duct and the second duct are equidistant from the pivot axis.

Abstract: A proportional pressure control valve (1) for controlling the pressure level in a hydraulic circuit having a push rod (5) as a connection between a control element (13) arranged in the hydraulic circuit and a proportional magnet located in a housing (10), which comprises a magnetic core (2), a magnetic anchor (3), and a magnetic coil (4), the magnetic coil (4) and the magnetic core (2) are securely connected to the housing (10), and the magnetic anchor (3) can be moved axially back and forth between two end positions by means of a magnetic force. At least one part of the magnetic anchor (3, 3?) is arranged so as to be movable relative to the anchor rod (6) in dependence upon the magnetic flow, so that in this way either the gaps (11, 14) are enlarged and/or an additional second gap (8) is produced.

Abstract: A balance-plug cage style control valve has substantially reduced body-bonnet bolt loading with an elastic seal. The elastic seal assembly includes an annular seal having an elastic region, a compression surface, and at least one sealing surface positioned in a channel within a valve cage mounted inside the valve body. At least one shoulder on the valve bonnet engages the elastic seal to deform the elastic region to place the sealing surface of the seal in contact with at least one of the valve bonnet or the valve cage to form a fluid seal.

Abstract: An injection pump assembly 10 in a chemical delivery system for simultaneously delivering reagents into a combinatorial reactor system having multiple injectors. The assembly 10 has a plurality of injectors 12, each injector 12 being in fluid communication with one of the multiple reactors. Each injector 12 has (1) a pump 14 in which a plunger 18 sealingly moves to ingest, store and discharge a flushing solvent 20; (2) a pipette assembly 22 for loading, storing, and discharging one or more reagents into one of the reactors in the combinatorial reactor system, first and second reservoirs for retaining some of the reagents; (3) one or more hollow needles 32, each for selectively delivering a reagent 24 to the first 28 or the second 24 reservoir; (4) a first valve 34 positioned downstream of the first 28 reservoir; and (5) a second valve 36 positioned downstream of the second 30 reservoir. When each valve 34, 36 is in a closed position, the reagents 24, 48 can be stored in isolation from each other.

Abstract: A binary balance seal assembly for use in a balanced pressure valve having a valve housing and a valve plug movable within the housing between an open position and a closed position. The seal assembly comprises an annular primary seal which is adapted to be retained within the valve housing. The primary seal is deformable into sealed engagement with the outer surface of the valve plug when pressure is applied to the primary seal as occurs upon the movement of the valve plug from its closed position toward its open position. In addition to the primary seal, the seal assembly includes an annular secondary seal which is adapted to be retained within the valve plug itself. The secondary seal is movable into sealed engagement with a portion of the valve housing when the valve plug is moved to its closed position so as to prevent upstream pressure from causing fluid to leak downstream of the valve plug.

Abstract: A pressure compensating element (8) for a control valve (3) for controlling an overflow of a medium from a first pressure space (1) into a second pressure space (2) has a diaphragm (9) separating the pressure spaces (1, 2) from one another. The pressure compensating element (8) compensates forces acting on a valve body (5) of the control valve (3) and generated by pressure differences in the pressure spaces (1, 2). However, an overflow of a medium from one pressure space (1) into the other pressure space (2) takes place solely in the region of the control valve (3).

Abstract: A control system for a subsurface safety valve (SSV) comprising of a control line from the surface in fluid communication with the top side of an actuating piston which moves a flow tube downwardly to open the SSV. A balance line runs from the surface to the bottom side of the same actuating piston to put the actuating piston in pressure balance. A buildup of pressure in the control line overcomes a return spring to open the valve, while removal of pressure from the control line allows the return spring to close the valve. Seals and leakpaths are provided through the actuating piston so that, depending on the hydrostatic pressure in the control line and the size of the return spring, the various failure modes of the actuating piston seals and control line or balance line will preferentially result in a fail-closed situation in the SSV.

Abstract: An automatically releasable shut-off coupling, for use in high pressure fluid applications, has matable and separable stationary and break-away modules forming a housing having a substantially straight throughpassage. An intermediate carrier member is slidably retained within the stationary module for movement from a retracted position to an extended position, upon application of a threshold value force by the break-away module.

Abstract: A hydraulic servovalve is controlled electrically through electromagnetic means. Electrical currents applied to force motors determine the relative position of a single, displaceable control assembly within the valve. Displacive movement of the control assembly changes, in reciprocal proportion, the inlet and outlet flow-metering clearances in each of the chambers of this open-passage type valve. The position of the control assembly determines the inlet and outlet flows within, and, therefore, the net flow through, each chamber. Moreover, since the chambers are each connected (either directly, or through a flow-impeding orifice) to one of the control ports, the position of the control assembly thereby determines the control flow delivered by the valve. Generally, both hydrostatic and hydrodynamic forces within the valve are balanced against corresponding forces, all acting upon the control assembly.

Abstract: The functions of a diverter valve and a variable orifice valve are combined in a single valve including an elongated magnetic member that is pivoted at a first end with a portion of the second end being positioned between opposed restrictors, a coil assembly for producing a magnetic field for selectively pulling the magnetic member toward one of the restrictors, sealing the restrictor it is pulled against thereby enabling the diversion of fluid flow, for example, from one nozzle to another, and further including a ball screw and torque motor attached to the first end of the magnetic member for selective movement thereof fore and aft, with the second end of the magnetic member being tapered and positioned in cooperative relation with respect to an orifice in a fluid inlet member whereby the fore and aft movement of the magnetic member controls the size of the orifice and the amount of fluid flow.

Abstract: A sanitary valve assembly for controlling the flow of hot and cold water, which includes at least two superimposed annular control elements arranged and constructed to provide at least two passgeways therethrough with a control lever operable coupled to one of the control elements for proportioning both hot and cold water therethrough. The control elements are formed having reduced surface areas for effecting a watertight seal.

Abstract: An operating mechanism for a rotary valve comprises a rack 18 reciprocatable within a housing 10 by an actuator 20 axially movable from outside the housing through an access aperture 30. The rack engages a pinion 14 connectable with a valve stem 16. A bellows seal 24 surrounds the actuator and is sealed at one end to the rack and at the other end to the housing about the aperture to prevent escape of any noxious fluids which might escape past the valve gland into the operating mechanism housing when sealingly mounted to the valve body.

Abstract: A bi-stable electrically operated valve including a housing having inlet, outlet and return conduits, an intermediate conduit between the inlet and return conduits, a bi-stable electro-mechanical transducer having a flapper slidably mounting a first ball valve, first and second seats on the intermediate conduit, a third seat on the outlet conduit, the first and third seats being alternately engageable by the first ball valve to permit communication between the inlet and outlet conduits when the valve is open or between the inlet and return conduits when the valve is closed, a second ball valve, a piston for moving the second ball valve onto the second seat on the intermediate conduit, a conduit for effecting communication between the outlet conduit and the piston so as to cause the piston to drive the second ball valve onto the second seat when the inlet and outlet conduits are in communication, to thereby close off the inlet conduit from the return conduit, and a bleed opening between the inlet conduit and t

Abstract: A free delivery controlled return valve, of the type employed in fluid power hoisting apparatus, which controls the speed at which a load is lowered as a function of load magnitude. An improved valve structure is disclosed which overcomes false load signals, such as those generated when the hoisting apparatus' lift cylinders are fully extended against a stop, and which thus permits the load platform to descend at an appropriate speed. An improved fluid sonic muffler is also disclosed.