Abstract: A system for controlling a flow rate of a fluid through a valve includes a controller. The controller is configured to receive a raw flow rate measurement from a flow rate sensor assembly configured to measure the flow rate. The controller is further configured to apply a flow rate measurement filter to the raw flow rate measurement to generate a filtered flow rate measurement. The controller is further configured to control actuation of an actuator configured to change the flow rate using the filtered flow rate measurement. The controller is configured to automatically adjust the flow rate measurement filter in response to detecting an event that causes stoppage of the actuation of the actuator.

Abstract: Electronics with a DCC adaptive filter for attenuating noise in a feedback path of a flow controller are provided. The electronics include a signal processor configured to receive a flow signal from a flow sensor, the flow sensor is configured to measure a flow rate of a pulsating fluid flow, receive a constant reference signal, and generate a flow rate signal using the constant reference signal and the flow signal. The electronics also include a controller communicatively coupled to the signal processor, which is configured to generate a flow rate control signal using the flow rate signal. The electronics additionally include a signal generator communicatively coupled to the controller. The signal generator is configured to receive the flow rate control signal, generate a valve signal based on the flow rate control signal, and provide the valve signal to a valve to control the flow rate of the pulsating flow.

Abstract: A method including measuring pressure of water in a water system of a structure at a single location in the water system using a pressure sensor of a sensing device to generate pressure measurement data representing the pressure of the water as measured by the pressure sensor. The method also can include communicating the pressure measurement data to one or more processors. The method additionally can include detecting a non-cyclical pressure event corresponding to a water leak in the water system of the structure during a first time period based on an analysis of information including the pressure measurement data. The information analyzed in the analysis does not include flow measurement data that represents a total amount of flow of the water in the water system of the structure during the first time period. Other embodiments are described.

Abstract: A valve assembly including a tubular having a first end, a second end, and an intermediate portion extending therebetween. The second end includes one or more openings. A pin member extends radially outwardly of the intermediate portion of the tubular. A valve member is arranged about the tubular. The valve member includes a first end portion, a second end portion and an intermediate section extending therebetween. The second end portion includes a valve element that registers with the one or more openings. An actuator sleeve is mounted to the first end of the valve member and extends about the tubular. The actuator sleeve includes a first end section, a second end section, and an inner surface extending therebetween. The inner surface includes a plurality of J-slots that are selectively receptive of the pin member to establish a position of the valve element relative to the one or more openings.

Abstract: The present invention relates to a downhole valve system (1) for controlling inflow of a fluid from and to a formation (100), comprising a casing (2) having an inner surface (3), an outer diameter (ODc) and an inner diameter (IDc), and a cross section (Ac) defined by the inner diameter, the casing comprising a plurality of valves (4, 4a, 4b, 4c) arranged spaced apart from each other for controlling the flow of the fluid to and from the formation through the casing, and a plurality of autonomous operating adjusting devices (5) each controlling one of the plurality of valves and each autonomous operating adjusting device comprising a body (6) having an outer body diameter (Db) and a body cross section (Ab), the plurality of autonomous operating adjusting devices being fastened inside the casing in order to allow the fluid to flow between the outer body diameter of the body of the autonomous operating adjusting device and the casing.

Abstract: A mass flow meter utilizes both positive and negative slopes of operating curves for first and second thermal sensors for a wider dynamic range. First and second interfaces receive first and second signal readings from first and second thermal sensors. A selection module identifies a zone from the first and second output signals and determines an assigned thermal sensor for the zone from the zone table, regardless of whether the thermal sensor output signals from a positive or negative slope of an operating curve.

Abstract: A pressure type flow control system with flow monitoring includes an inlet side passage, a control valve comprising a pressure-type flow control unit connected downstream of the inlet side passage, a thermal-type flow sensor connected downstream of the control valve, an orifice installed on a fluid passage connected downstream of the thermal-type flow sensor, a temperature sensor provided near the fluid passage between the control valve and orifice, a pressure sensor provided for the fluid passage between the control valve and orifice, an outlet side passage connected to the orifice, and a control unit comprising a pressure-type flow rate arithmetic and control unit to which a pressure signal from the pressure sensor and a temperature signal from the temperature sensor are input, and which computes a flow rate value of fluid flowing through the orifice, and outputs a control signal to a valve drive unit of the control valve.

Abstract: A hydraulic network (1) having plural parallel zones (Z1, Z2) with a regulating valve (V1, V2) in each zone for regulating a flow of fluid (?1, ?2) through respective zones. Characteristic parameters of the hydraulic network (1) include static flow capacity values (Kex,a, Kex,b) of the zones. Measurement data sets are recorded which include a determined value of a hydraulic system variable of the hydraulic network (1), e.g. the total flow (?tot) or the system pressure (?P), and valve positions of the regulating valves (V1, V2) set for the determined value of the hydraulic system variable. The characteristic parameters are calculated from plural measurement data sets, by grouping related measurement data sets, which include the same value of the hydraulic system variable but different valve positions, and by using the flow capacity (Kvalve,a, Kvalve,b) of the regulating valves (V1, V2) at the valve positions included in the data sets.

Abstract: A heated spray system for frost protection and prevention is described. Heated water, such as groundwater, is delivered through a spray system to the area surrounding the irrigated crops, thus increasing the temperature near the crops and preventing frost damage. Surface water is provided, by a drip irrigation line. The crops are protected from excessive irrigation with the addition of protective covers, a protective curtain, and a drainage system. When spraying groundwater for temperature control, the covers, curtain, and drainage system prevent the water from reaching the roots of the crops, and thus prevent the groundwater from damaging the roots due to contaminants and pollutants in the groundwater.

Abstract: A subsea chemical injection system has a subsea structure, a manifold connected by jumper to the subsea structure, a coiled tubing, a disconnect mechanism affixed to the coiled tubing, and a hose extending from the disconnect mechanism to the manifold such that the chemical flowing through the coil tubing can selectively flow through the disconnect mechanism and through the hose to the subsea structure. The disconnect mechanism is adapted to selectively release from the hose. The disconnect mechanism has a connector affixed thereto. A hydraulic fluid supply is connected to the connector so as to selectively release the connector from the hose. Control lines can extend from a surface location to a control module and the disconnect mechanism for selectively delivering for receiving signals from the subsea structure.

Abstract: In a method of controlling operation of a pneumatic conveying system (1) including a source (6) for generating transport air flow in an active state, transport piping (4) and multiple material inlet points in at least one branch (B1, B2, B3, B4) of the transport piping and communicating with the system through discharge valves (3) controlling emptying of associated material inlet points, material transport conditions of the system are sensed for each inlet point emptying operation, the material transport conditions are sensed at one or more remote locations from the material inlet points and a valve open time for the material inlet point discharge valves is determining for each emptying operation and based on a processing of feedback from material transport condition sensors (11, 12) of the system. A pneumatic conveying system as well as a system (16) for controlling operation of the pneumatic conveying system are also provided.

Abstract: A fluid supply system includes a pressure tank configured to contain a pressurized gas and a fluid, a delivery point configured to be connected to a point of use, a recirculation piping connecting the pressure tank to the delivery point, and a return pump connected to the recirculation piping. The recirculation piping defines a circulation path for the fluid from the pressure tank through the delivery point and back to the pressure tank. The return pump is downstream of the delivery point and upstream of the pressure tank in the circulation path.

Abstract: A Self-Organizing Multi-Stream Flow Delivery Process and Enabling Actuation and Control are introduced. The method and apparatus of building a general-purpose self-organizing multi-stream flow delivery process are presented. As a case example, an actuation and control system to control a multi-stream liquid flow delivery process using Self-Organizing Actuation and Control Units (SOACU) is described.

Abstract: A valve and actuator assembly that includes a valve configured to control a flow of liquid into a coil or heat exchanger. The valve and actuator assembly further includes a valve actuator configured to control opening and closing of the valve via positioning of a valve closure member. The valve actuator is further configured to provide both a maximum flow rate and a minimum flow rate of the liquid through the valve. In an embodiment, the valve actuator includes a valve closure member position sensor configured to determine the position of the valve closure member based on a flow rate of the liquid through the valve.

Abstract: A system and method for improving the control of a flow of a variety of fluid types is described. The method includes selecting a process gas type for the process gas that will be controlled and obtaining molecular mass information for the selected processed gas type. General characterization data is obtained that includes, for each of a plurality of flow and pressure value pairs, a corresponding control signal value and operating characterization data is generated by modifying the flow values in the general characterization data according to the equation Fadj=Fcal*(Mcal/Mpr)k, wherein Fadj is an adjusted flow value Fcal is the calibrated flow value, Mpr is the molecular mass for the selected process gas type, and Mcal is a molecular mass for the calibration gas. The operating characterization data is then used to operate a valve of the mass flow controller in open loop control mode.

Abstract: An apparatus comprises a proportional valve, a first channel connected to the proportional valve, a flow sensor connected to the first channel and configured to measure gas flow in the first channel, a split channel connected to the first channel at a location between the proportional valve and the flow sensor, and a control component connected between the flow sensor and the proportional valve and configured to control gas flow in the first channel.

Abstract: A pressure type flow control system with flow monitoring includes an inlet, a control valve including a pressure flow control unit connected downstream of the inlet, a thermal flow sensor connected downstream of the control valve, an orifice installed on a fluid passage communicatively connected downstream of the thermal flow sensor, a temperature sensor provided near the fluid passage between the control valve and orifice, a pressure sensor provided for the fluid passage between the control valve and orifice, an outlet communicatively connected to the orifice, and a control unit including a pressure type flow rate arithmetic and control unit receiving a pressure signal from the pressure sensor and a temperature signal from the temperature sensor, and a flow sensor control unit to which a flow rate signal from the thermal flow sensor is input.

Abstract: A flow state controlling device controls, to a specified flow state, fluid of a gas/liquid two-phase flow that flows through a flow path. The flow state controlling device includes a pressure acquiring portion that acquires pressure information relating to pressure of the fluid, a mass velocity acquiring portion that acquires mass velocity information relating to a mass velocity of the fluid, a dryness fraction acquiring portion that acquires dryness fraction information relating to the dryness fraction of the fluid, and a controlling portion that controls, based on the pressure information, the mass velocity information and the dryness fraction information, a pressure controlling device that is able to change a pressure of the fluid, a mass velocity controlling device that is able to change a mass velocity of the fluid, and a heat controlling device that is able to change the latent heat of the fluid.

Abstract: A flow control valve for use in oil well bore holes is described. The flow control valve includes a plurality of flow paths connected in parallel. The flow control valve operates by successively opening different flow paths, starting with a flow path that requires a reduced force to operate its inlet valve. The flow rate through the flow control valve is conveniently controlled by opening and closing different ones of the plurality of flow paths individually or in combination. A flow path that allows fluid to flow at substantially the full flow rate of the valve is provided as one of the parallel paths. A simple mechanical design using poppet valves and at least one cam is described. The flow control valve provides advantages including digital control of the flow rate, low operating power requirements and abrasion resistance in the presence of particulates in the fluid.

Abstract: A throttle housing having an inlet end and an outlet end includes a shuttle housing disposed within the throttle housing. The shuttle housing has a first end cap at a first end and an orifice array therethrough. The shuttle housing comprises a shuttle housing therein. The shuttle has an opened position and a closed position relative to the shuttle housing. The shuttle defines a varying control volume between the end cap, the shuttle and the shuttle housing. The control inlet fluidically communicates a control fluid to the control volume to control the position of the shuttle in the shuttle housing.

Abstract: Provided is a raw material gas supply device which includes: a raw material container; a carrier gas supply unit configured to supply a carrier gas into the container via a carrier gas flow path; a first flow rate measurement unit configured to measure a flow rate of the carrier gas flowing therethrough and output the same as a first flow rate measurement value; a raw material gas supply path configured to supply a raw material gas containing a vaporized raw material into a film forming apparatus; a second flow rate measurement unit configured to measure a flow rate of the raw material gas flowing therethrough and output the same as a second flow rate measurement value; and a flow rate calculation unit configured to calculate a difference between the first and second flow rate measurement values and to convert the difference into a vaporization flow rate of the raw material.

Abstract: A fluid flow control device includes a regulator for operating at high pressures and an integral bypass valve. The regulator and the bypass valve each include a control assembly that is movable between an open position and a closed position. The regulator and bypass valves are biased into the open positions and adapted to move into the closed positions when an operating pressure rises to above respective regulator and bypass set-point pressures. The bypass set-point pressure is lower than the regulator set-point pressure such that when the operating pressure rises above the bypass set-point pressure, the bypass valve automatically closes and allows the regulator to perform under normal operating conditions. So configured, the bypass valve is arranged to accommodate at least some of the fluid flow through the system until the operating pressure reaches the normal operating pressure, which is somewhere between the bypass and regulator set-point pressures.

Abstract: A pressure type flow control system with flow monitoring includes an inlet side passage, a control valve comprising a pressure-type flow control unit connected downstream of the inlet side passage, a thermal-type flow sensor connected downstream of the control valve, an orifice installed on a fluid passage connected downstream of the thermal-type flow sensor, a temperature sensor provided near the fluid passage between the control valve and orifice, a pressure sensor provided for the fluid passage between the control valve and orifice, an outlet side passage connected to the orifice, and a control unit comprising a pressure-type flow rate arithmetic and control unit to which a pressure signal from the pressure sensor and a temperature signal from the temperature sensor are input, and which computes a flow rate value of fluid flowing through the orifice, and outputs a control signal to a valve drive unit of the control valve.

Abstract: A pump control assembly having a flow control assembly disposed between the first end of a load sensing valve and a fluid pump is disclosed. The flow control assembly may include an orifice, a first valve assembly, and a second valve assembly. When the first valve assembly is in an open position and the second valve assembly is in a first position, fluid passing through the orifice is directed to a fluid reservoir and to the load sensing valve. When the first valve assembly is in a closed position and the second valve assembly is in a second position, all fluid passing through the orifice is directed to the load sensing valve. An electronic controller can be configured to transmit an output current to the first and second valve assemblies in response to an operational parameter of a prime mover supplying power to the fluid pump.

Abstract: A mass flow controller comprises: a pressure-based flow meter, a thermal-based flow meter, a control valve, and a system controller. The pressure-based flow meter and thermal-based flow meter each measure flow rate of mass through the mass flow controller. The control valve controls the flow rate in response to a control signal generated as a function of the flow rate as measured by thermal-based flow meter when the measured flow rate is relatively low, and as a function of the flow rate as measured by the pressure-based flow meter when the flow rate is relatively high. A comparison of the flow measurements of the two flow meters can be used to (a) sense pressure disturbances at low flow rates, and (b) sense when the thermal-based flow meter is out of calibration so that a zero offset signal can be applied to the thermal-based flow meter.

Abstract: A method is provided for controllably delivering an additive fluid into a host fluid in a target system at a desired volumetric flow rate. The method comprises: providing a binary supply injector connected in an additive fluid delivery system between a pressurized supply of the additive fluid and the target system. The binary supply injector is controllable between an ON state which permits flow of the additive fluid therethrough and an OFF state which prevents flow of the additive fluid therethrough. The method involves iteratively repeating: estimating a volumetric flow rate of the additive fluid between the pressurized supply and the target system; and if the estimated volumetric flow rate of the additive fluid is greater than the desired volumetric flow rate, controlling the supply injector to its OFF state; or if the estimated volumetric flow rate of the additive fluid is less than the desired volumetric flow rate, controlling the supply injector to its ON state.

Abstract: For the purpose of balancing (S3) a group of consumers in a fluid transport system in which each consumer is configured with a motorized regulating valve for the purpose of regulating the flow through the consumer, characteristic data for the consumer is saved (S2) which determines a valve position of the corresponding regulating valve for the target throughput through each consumer. A momentary total throughput through the group of consumers is determined (S32) by means of a common throughput sensor, and based on the momentary total throughput and a sum of the desired target throughputs through the consumers, a balancing factor is determined (S34). By setting (S31) the valve positions of the corresponding regulating valves based on the characteristic data and the balancing factor, a dynamic balancing of the consumers is carried out.

Abstract: A safety shut-off device is provided for a liquid gas system for vehicles and/or vehicle trailers, in order to avoid an inadvertent release of gas. The device includes an electromagnetic gas valve for supplying/shutting off the gas, an electronic unit for activating the electromagnetic gas valve, and a flow sensor for determining a current gas flow being discharged from a storage tank. Furthermore, the device includes an evaluation unit for comparing the current gas flow to a previous gas flow or to a gas flow which is indicated by the gas consumers and is to be expected. If, during use, the evaluation unit determines a current gas flow which differs by more than a maximum permissible rate of change from the previous gas flow or from an expected gas flow, the electromagnetic gas valve is activated via the electric unit in order to shut off the supply of gas.

Abstract: In various embodiments, an electronic flow selector of a fluid flow control system may be used to select a flow rate of a fluid. The fluid flow control system may be operated in an electronic mode and a manual mode. When the system is in a manual mode, mechanical backup flow selectors may be used to select the flow rate of a fluid. The mechanical backup flow selectors may include a position detection system to determine the flow rate of a fluid. Flow selectors of the flow control system may be rotationally engaged with the valve shafts of each needle valve, while allowing them to translate axially. The flow selectors may remain axially fixed while the valve shafts are axially translated with respect to the needle valves in a fluid flow control system.

Abstract: In various embodiments, an electronic flow selector of a fluid flow control system may be used to select a flow rate of a fluid. When the system is in an electronic mode, an encoder may electronically encode the fluid flow selection. A controller may receive the electronically encoded flow selection and transmit a corresponding control signal to an electronic valve to allow the fluid to flow at the selected flow rate. When the system is in a manual mode, mechanical backup flow selectors may be used to directly control the flow rate of a fluid. When the system is in a manual mode, the mechanical backup flow selectors may be in a deployed position. When the system is in an electronic mode, the mechanical backup flow selectors may be in a retracted position. Particular applications to gases and anesthesia delivery are disclosed herein.

Abstract: In various embodiments, an electronic flow selector of a fluid flow control system may be used to select a flow rate of a fluid. When the system is in an electronic mode, an encoder may electronically encode the fluid flow selection. A controller may receive the electronically encoded flow selection and transmit a corresponding control signal to an electronic valve to allow the fluid to flow at the selected flow rate. When the system is in a manual mode, backup manual flow selectors may be used to directly control the flow rate of a fluid. When the system is in a manual mode, the mechanical backup flow selectors may be in a deployed position. When the system is in an electronic mode, the mechanical backup flow selectors may be in a retracted position. Particular applications to gases and anesthesia delivery are disclosed herein.

Abstract: A method for controlling a water supply amount and a refrigerator using the same are disclosed. The method includes receiving information regarding a water supply amount selected by a user, counting a duration after starting water supply, and checking whether an error in a water supply amount measurement unit exists. When the water supply amount measurement unit is normal, an actual water supply amount is determined based on a signal from the water supply amount measurement unit, and, when a fault exists, a water supply amount is determined based on correlation between a stored water supply amount for normal operation and a water supply duration. Water supply is stopped when the selected water supply amount and the determined water supply amount are equal. When the water supply amount measurement unit is normal, the signal from the water supply amount measurement unit and information regarding a water supply duration are stored.

Abstract: A fluid conduit arrangement includes a reservoir containing a pressurized gas therein. An outer rigid conduit in communication with the reservoir contains a first working fluid under pressure from the pressurized gas within a dosed system defined by the reservoir and the outer rigid conduit. An inner flexible conduit is provided for conducting a second working fluid therethrough upon application of a supply pressure. The inner flexible conduit is disposed within the outer rigid conduit, and is subjected to the pressurized first working fluid in surrounding relationship therewith. Relative differences between the pressurized first working fluid and the second working fluid enable the inner flexible conduit to either expand and permit free flow of the second working fluid therethrough, or collapse and evacuate flow of the second working fluid therefrom.

Abstract: Automated measurement and oil well production control may be achieved by using a vertical separator, the discharge flow of which is continuously adjusted by setting the opening of a control valve, determined by the liquid level inside the separator. The automation of the control method allows real-time measurements of several process variables as well as reduced measurement times and also works as a safety layer for a production process. The control method is independent of well production and is therefore suited to controlling marginal wells.

Abstract: An particle separation microstructure comprising a body and a flow channel extending through the body, having an inlet and an outlet for receiving a flow of particles therethrough. The flow channel comprises opposing first and second walls disposed in a spaced-apart relationship and at least one protrusion extending from the first wall into the flow channel and extending along a length of the flow channel. At least a portion of one of the first and second walls is reversibly actuatable between a first and a second position and the first and second walls are substantially parallel in the second position. In the first position the flow channel is open for receiving the flow of particles and in the second position the at least one protrusion abuts the second wall and the flow channel is constricted for restricting the flow of particles and separating particles from the flow of particles.

Abstract: In one embodiment, an overflow protection system for a fluid transfer system with an opening to the environment comprises at least one sensor and a fluid flow regulating device in communication with the at least one sensor, the fluid flow regulating device configured to change the rate of input fluid flow when a signal from the at least one sensor indicates a change in the output fluid flow rate. In another embodiment, an overflow protection system for a fluid transfer system provides an alert when a change is detected in the output fluid flow rate. In one embodiment, a method for overflow protection in a fluid transfer system with an opening to the environment comprises sensing a reduction in output fluid flow and reducing the input fluid flow or providing an alert.

Abstract: The method includes the following steps: creation of a pressurised gas flow with a controlled flow-rate and a given temperature; and injection into the pressurised gas flow of a liquid composition including at least one liquid essential oil, at a dosed flow rate; whereby the flow rate of the gas flow and that of the liquid composition are controlled such that the gas flow, following injection, has a partial essential oil vapour pressure of at least 20% at the saturation pressure of the essential oil vapour at the temperature of the gas flow.

Abstract: A balancing method and a balancing device (100, 101, 200, 201, 301, 303) for determining a fluid balance between a flow quantity in a first flow path (FW1) and a flow quantity in a second flow path (FW2) are disclosed. The disclosed balancing device (100, 101, 200, 201, 301, 303) comprises the following elements: a differential flow measuring unit (D) for measuring the differential flow between a flow in the first flow path (FW1) and a flow in the second flow path (FW2), a branch from one of the two flow paths (FW1, FW2) for diverting fluid from one of the two flow paths into the other flow path (W), a device for setting the flow quantity (P11, P12) in the additional flow path, which can be controlled in such a way that the measured differential flow fulfills a predetermined condition, and with a device (K) for determining the flow quantity in the additional flow path as a measure of the fluid balance.

Abstract: Systems and methods for automatically regulating the flow of fumes suctioned through a welding fume gun are provided. In certain embodiments, an automatic flow control assembly includes a vacuum system configured to suction a vacuum fume flow through an internal passage of a welding fume gun. The automatic flow control assembly also includes a sensor configured to measure a parameter related to the vacuum fume flow. The automatic flow control assembly further includes a flow regulation device configured to regulate an ambient air flow introduced into the vacuum fume flow. In addition, the automatic flow control assembly includes control circuitry configured to control the flow regulation device based at least in part on the measured parameter related to the vacuum fume flow.

Abstract: Methods and apparatus for depositing uniform boron-containing films are disclosed. A first precursor is delivered to a chamber through a first pathway having a first flow controller and a composition sensor. A second precursor is delivered by a second pathway, including a second flow controller, to a mixing point fluidly coupling the first and second pathways. A controller is coupled to the vibration sensor and the first and second flow controllers. The first precursor may be a mixture of diborane and a diluent gas, and the second precursor is typically a diluent gas. The flow rate of the first precursor may be set by determining a concentration of diborane in the first precursor from the composition sensor reading, and setting the flow rate to maintain a desired flow rate of diborane. The flow rate of the second precursor may be set to maintain a desired flow to the chamber.

Abstract: A control program for a positive displacement metering system measures the time required for the travel of a free piston in a cylinder of known volume to determine an average flow rate during a full stroke of the piston. The system may also measure and record the inlet and outlet pressures or the differential pressure between the fluid inlet and outlet. The control program positions a four-way valve which may function as an adjustable metering orifice in response to the measured average flow rate and/or changes in the inlet and outlet pressures to achieve the desired flow rate. At the end of each stroke, the four-way valve is repositioned to reverse fluid flow through the metering cylinder. The system may revise the valve position settings for both forward and reverse strokes based on the measured time required for a full stroke at a certain valve position. In this way, the system automatically and iteratively compensates for changes in fluid properties and fluid pressure.

Abstract: A method for determining a fluid flow rate with a fluid control valve utilizes inherent characteristics of a particular valve in conjunction with easily measured parameters in order to determine a flow rate through the valve. A valve flow characteristic equation, a flow coefficient, and a rangeability for the valve are known and hardcoded into a chipset that controls the valve. A differential pressure transducer measures the pressure drop across the valve. A valve actuator controls the valve opening fraction. The differential pressure transducer and the valve actuator provide feedback signals to the chipset. The known and measured parameters are used to calculate an instantaneous valve characteristic and a fully-open flow rate for the valve. The instantaneous flow rate through the valve is then calculated from the instantaneous valve characteristic and the fully-open flow rate.

Abstract: A fluid flow regulator has a body defining a tapered central passageway. A ferrous or magnetic ball is disposed within the central passageway and may be biased to a predetermined location within the passageway by a spring. An electromagnet is disposed at one end of the passageway. Varying electrical power to the electromagnet attracts or repels the ball thereby moving it to different locations within the tapered passageway to vary the flow through the passageway.

Abstract: A gas dividing/supplying apparatus includes a pressure-type flow control system, a plurality of divided flow passages connected in parallel with each other and through which gas flowing from the pressure-type flow control system is divided and supplied to a process chamber, thermal-type mass flow sensors disposed in the divided flow passages, respectively, motor-operated valves disposed on a downstream side of the thermal-type mass flow sensors, respectively, and switching-type controllers that control opening and closing of the motor-operated valves, respectively, and, in the apparatus, the switching-type controllers perform switching between valve opening control for maintaining the motor-operated valves at a predetermined fixed valve opening degree based on a valve opening control command signal and divided flow control for regulating an opening degree of each of the motor-operated valves by feedback control based on a flow detection signal of the thermal-type mass flow sensor by a divided flow control com

Abstract: A processing method performs a predetermined process to an object by supplying a process gas at a prescribed flow rate into a process container to which a gas supply unit and an exhaust system are connected. The processing method includes a first process of setting the gas supply unit to supply a process gas at a flow rate greater than the prescribed flow rate of a predetermined process for a predetermined short time from a gas channel while exhausting an atmosphere in the process container through the exhaust system; and a second process of setting the gas supply unit to supply the process gas at the prescribed flow rate from the gas channel after the first process is completed.

Abstract: Embodiments of the invention relate to a supersonic inlet having a cowl lip configured to capture the conic shock and exhibit a zero or substantially zero cowl angle. The inlet may be configured to employ a relaxed isentropic compression surface and an internal bypass. The nacelle bypass may prevent flow distortions, introduced by the capture of the conic shock, from reaching the turbomachinery, thereby allowing the cowl angle to be reduced to zero or substantially zero. Such a cowl angle may reduce the inlet's contribution to the overall sonic boom signature for a supersonic aircraft while allowing for an increase in engine pressure recovery and a subsequent improvement in generated thrust by the engine.

Abstract: It is possible to prevent processing gases from being mixed when alternately supplying the processing gases while alternately switching the processing gases and to suppressed a transient phenomenon more efficiently as compared to conventional cases. When supplying at least two kinds of processing gases (e.g., a C4F6 gas and a C4F8 gas) into a processing chamber while alternately switching the at least two kinds of processing gases during a plasma process on a wafer, the supply of each processing gas can be alternately turned on and off by alternately setting an instruction flow rate of a mass flow controller to be a predetermined flow rate and a zero flow rate while a downstream opening/closing valve provided at a downstream side of the mass flow controller is open.

Abstract: A device and method for continuously controlling the flow rate of an aqueous chemical drawn into a flowing fluid stock includes a metering assembly drawing the aqueous chemical into the inlet of a metering assembly through a flow rate sensor and then through a metering device and into the flowing fluid stock. The flow sensor is monitored and an electronic controller can adjusts the flow rate of the aqueous chemical through the metering device in response to monitoring the flow rate sensor. An electronic controller can also change the direction of the flow of the aqueous chemical into the flowing fluid stock through one ejector to another ejector in response to monitoring at the metering assembly.

Abstract: A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.

Abstract: Fluid flow properties often dictate the performance of processing operations. The present invention relates to a system for evaluating properties of a fluid flowing in a pipe. A test cell (20) which includes two parallel surfaces (5, 6) which are positioned in the flow. One of the surfaces is moveable relative to the other, to a position in close proximity to the other, to create a stagnant flow region between the surfaces. The system further includes a test input device (10) to apply input motion to one of the surfaces, and a test output device (13) to measure output motions from the cell in response to input motions. Furthermore, the system includes a processing device (9) to calculate rheological parameters of the fluid from signals produced from the test input and test output device. There is also a process for evaluating properties of a flowing fluid.