Class / Patent application number | Description | Number of patent applications / Date published |
137486000 | Responsive to change in rate of fluid flow | 58 |
20080216901 | Pressure control for vacuum processing system - A pressure control system includes a digital communication network between a pressure sensor and a pressure controller. The digital communication network is configured to communicate signals between the pressure sensor and the pressure controller. The pressure sensor is configured to measure pressure within a vacuum chamber in a processing tool. The pressure controller is responsive to pressure measurements made by the pressure sensor and communicated to the pressure controller through the digital communication network, to control the pressure within the vacuum chamber so as to maintain the pressure in the vacuum chamber at a pressure set point received from the tool. | 09-11-2008 |
20080251137 | IN-SITU MONITOR OF INJECTION VALVE - The present invention generally provides methods and apparatus for monitoring performance of an injection valve. In one embodiment, a control signal relates to an actuator movement is monitored and correlated to performance of the injection valve. | 10-16-2008 |
20080283129 | Water Supply Shutoff Device - The present invention provides water supply shutoff device ( | 11-20-2008 |
20090242042 | Safety system for fluid conduit - A safety system for a fluid conduit includes an elongated flexible conduit having a first end and a second end and a central opening running therethrough and capable of transporting a first fluid under pressure. A first valve is located near the first end of the conduit and a second valve is located near the second end of the conduit. Each of the valves is moveable between a closed position and an open position so as to control the flow of the first fluid through the conduit. The central opening of the conduit is surrounded by a conduit wall which extends substantially the entire length of the conduit. A plurality of enclosed channels are located within the conduit wall and extend at least a substantial length of the conduit. A second fluid under pressure is contained in the channels and a sensor is provided for monitoring the pressure of the second fluid within the channels. One or both of the valves are operatively associated with the second fluid and close when the monitored pressure falls below a predetermined level. | 10-01-2009 |
20090277516 | Product Dispensing System - 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. | 11-12-2009 |
20090277517 | Passive Overpressure and Underpressure Protection For A Cryogen Vessel - In a magnet system for MRI imaging comprising a superconducting magnet ( | 11-12-2009 |
20090288718 | APPARATUS TO REGULATE FLUID FLOW - Apparatus to regulate fluid flow are disclosed. The apparatus includes an example regulator valve and an example automatically-adjusting or self-adjusting amplifier valve to maintain fluid flow during low downstream demand fluid flow conditions, and to maintain the operational accuracy and stability of the regulator valve during higher downstream demand fluid flow conditions. | 11-26-2009 |
20100101664 | FLUID CONTROL APPARATUS - A fluid control apparatus is provided, in which a tube ( | 04-29-2010 |
20100126600 | FAULT-TOLERANT CHEMICAL INJECTION SYSTEM FOR OIL AND GAS WELLS - A metering body for a chemical injection system comprises a free piston having a pair of mechanically-actuated poppet valves which may individually open to permit fluid to pass from one side of the free piston to the other. The free piston slides within a cylinder having cylinder heads at opposing ends. Input/output ports are provided in the cylinder heads. In a preferred embodiment, the poppet valves have actuators that extend beyond the opposing faces of the free piston. If one face of the piston moves to within a predetermined distance of a cylinder head, the actuator contacts the cylinder head and further movement of the piston causes the corresponding poppet valve to open, permitting fluid to flow through the piston. In this way, a fault-tolerant system may be implemented. If a power interruption or other failure of the controller occurs, the system will continue to supply fluid at the most recently selected flow rate. When power is restored (or the fault is corrected), the controller causes a valve to reverse the flow of fluid through the metering body and the spring-loaded poppet valve will close as the free piston moves away from the cylinder head. | 05-27-2010 |
20100132813 | VALVE LEAKBY DIAGNOSTICS - A method is disclosed for determining leakby in a flow controller ( | 06-03-2010 |
20100163119 | MASS FLOW METER AND MASS FLOW CONTROLLER - In order to improve a measurement accuracy of a mass flow meter, the mass flow meter comprises a flow rate calculating section that obtains an output signal from a sensor section having a thermosensitive resistive element arranged in a flow channel where a sample gas flows and that calculates a flow rate of the sample gas, a pressure measuring section that measures a primary side pressure in the flow channel, and a flow rate correcting section that corrects the measured flow rate obtained by the flow rate calculating section by the use of the primary side pressure obtained by the pressure measuring section and a gas coefficient determined by an isobaric specific heat of the sample gas. | 07-01-2010 |
20100200083 | FLOW RATE CONTROLLER - A flow rate controller detects a clogged state of an orifice to prevent errors during flow rate measurement. The flow rate controller includes a differential pressure flow meter, with an orifice disposed between a pair of pressure sensors, that converts a pressure difference detected by the two pressure sensors into a flow rate, a flow-rate adjusting valve whose degree of opening is controlled such that the difference between a measured flow rate value and a preset flow rate value falls within a predetermined range, and a control unit that controls the degree of opening of the flow-rate adjusting valve upon receiving the pressure values detected by the pressure sensors. The control unit compares the preset flow rate value and the measured flow rate value and determines that there is a clog fault when a flow rate difference, as compared with a predetermined value, continues for a predetermined time period. | 08-12-2010 |
20100229967 | MASS FLOW CONTROLLER VERIFYING SYSTEM, VERIFYING METHOD AND VERIFYING PROGRAM - In a mass flow controller verifying system, there are provided a verifying gas line arranged in parallel to influent flow gas lines and joined into a post-confluent flow gas line, a reference volume calculating portion adapted to calculate a reference volume determined for a specified piping of a gas piping system, a verifying parameter calculating portion adapted to calculate a verifying parameter based on time series data of a measurement pressure measured by a pressure measurement unit during a control of a flow rate by a mass flow controller to be verified, and a comparing portion adapted to compare a reference parameter set based on the reference volume and the verifying parameter, whereby the verifying system can be introduced into an existing gas piping system used in a semiconductor manufacturing process and so forth at a low cost and is capable of verifying a mass flow controller quickly and accurately. | 09-16-2010 |
20110048551 | FLOW RATE CONTROL DEVICE - A mass flow controller comprises a flow rate measuring part that measures a flow rate of a fluid flowing in a flow channel and outputs a measured flow rate value, a control valve, a valve control part that controls an opening degree of the control valve based on an entirely-close command to entirely close the control valve compulsorily or a set flow rate value set as a target value, and an external output part that outputs an external output flow rate value based on the measured flow rate value to the outside, and at a time when the valve control part receives the entirely close command or zero as the set flow rate value, the external output part outputs zero as the external output flow rate value, irrespective of the measured flow rate value. | 03-03-2011 |
20110168278 | GAS CUTOFF DEVICE - An object of the invention is to avoid a gap between the total using amount of gas and the sum of a plurality of change amounts held in a gas cutoff device. The gas cutoff device includes a flow rate detection unit | 07-14-2011 |
20120090702 | INTEGRATED ULTRASONIC FLOWMETER AND HYDRAULIC VALVE - The invention relates to the metering of water, being especially useful for agricultural purposes and other applications. An integrated water meter and cut-off valve with electronic controls is provided. The integrated water meter comprises a hollow body having an inlet port and an outlet port for a fluid and a passage connecting the ports; a generator of ultrasonic pulses in operational communication with the body, operationally connected to a US (ultra-sonic) transmitter transducer and a US receiver transducer, and a diaphragm valve inside the passage in fluid communication with the passage. | 04-19-2012 |
20120174992 | Apparatus and Method for Pressure Fluctuation Insensitive Mass Flow Control - A mass flow controller includes a thermal mass flow sensor in combination with a pressure sensor to provide a mass flow controller that is relatively insensitive to fluctuations in input pressure. The pressure sensor and thermal sensor respectively provide signals to an electronic controller indicating the measured inlet flow rate and the pressure within the dead volume. The electronic controller employs the measured pressure to compensate the measured inlet flow rate and to thereby produce a compensated measure of the outlet flow rate, which may be used to operate a mass flow controller control valve. | 07-12-2012 |
20120180876 | FLOW RATE MEASURING MECHANISM, MASS FLOW CONTROLLER, AND PRESSURE SENSOR - The present invention is a flow rate measuring mechanism provided with: a body unit that has an internal flow path through which a target fluid to be measured is configured to flow; and a pressure sensor that is attached to the body unit and senses a pressure of the internal flow path, and configured to calculate a flow rate of the fluid on the basis of the fluid pressure sensed by the pressure sensor, wherein the body unit has a length direction and a surface parallel to the length direction, which is set as a component attachment surface, and to the component attachment surface, the pressure sensor is attached such that a pressure sensitive surface thereof is substantially vertical to the component attachment surface and substantially parallel to the length direction, and thereby, without causing a reduction in pressure measurement sensitivity, makes a width direction size dramatically smaller than before. | 07-19-2012 |
20120204974 | FLOW CONTROLLER - A flow controller includes a flow detection unit that includes a detection unit for detecting the flow rate of a fluid; and a flow control unit that is coupled to the flow detection unit and that is capable of adjusting the flow rate of the fluid. The detection sensor constituting the detection unit includes a thermal flow sensor using MEMS technology, and the flow rate of the fluid that has been detected by the detection sensor is output to a control unit. In addition, in the flow control unit, the supply state of air to a supply room is switched by each of a supply-use solenoid valve and an exhaust-use solenoid valve, and on the basis of the supply state of the air, a control valve opens and closes. | 08-16-2012 |
20130319545 | BUTTERFLY VALVE FOR ARRANGEMENT IN A FLOW DUCT OF AN AIR-CONDITIONING INSTALLATION - The invention is a butterfly valve for a flow duct of an air-conditioning installation. The butterfly valve comprises two butterfly valve faces and is mounted for rotation about an axis. A device with at least two measurement points for determining the volume flow rate of a gaseous medium flowing in the flow duct is provided. In order to specify a butterfly valve, for example for a volume flow rate controller, which can determine a high differential pressure, even at very low volume flow rates, the butterfly valve comprises at least one hollow chamber on each of its two butterfly valve faces. Each hollow chamber has at least one recess, preferably with a multiplicity of recesses formed in the manner of a perforation. One measurement point is associated with one hollow chamber and the other measurement point is associated with the other hollow chamber. | 12-05-2013 |
20130327422 | METHOD AND APPARATUS FOR LIQUID FLOW CALIBRATION CHECK - A liquid flow calibration check system applied to a multi-port printer is presented to determine whether full calibration of the multi-port printer is required to obtain accurate mass flow rates within conduits of the multi-port printer. | 12-12-2013 |
20130340859 | METHOD OF AND APPARATUS FOR MEASURING THE MASS FLOW RATE OF A GAS - There is provided a meter ( | 12-26-2013 |
20140007950 | Pressure Control Device, Flow Rate Control Device and Recording Medium Having Programs Used for Pressure Control Device, Recording Medium Having Programs Used for Flow Rate Control Device - To provide a pressure control device that can prevent ringing and overshoot without changing gain even with a high gain setting, can quickly change pressure to a steady state even with a large set pressure value, and can equalize the time required from an initial to steady state regardless of the set pressure value, a valve control part is provided that includes an open degree operated amount output part that outputs an open degree operated amount based on a measured pressure value and a set pressure value, and a limiter part that sets an upper limit value of the open degree operated amount according to the set pressure value and that controls a pressure control valve by the open degree operated amount of the upper limit value when the open degree operated amount exceeds the upper limit value. | 01-09-2014 |
20140060671 | FLOW CONTROL AND INDICATOR ASSEMBLIES - Flow control and indicator assemblies are detailed. The assemblies are especially (although not necessarily exclusively) useful in allowing fluid to bypass automatic pool cleaners (APCs) and may serve as adaptors between APCs and adjacent hoses. The assemblies additionally may provide information about flow rates relative to a desired threshold, for example. | 03-06-2014 |
20140076424 | FLOW RATE CONTROLLER AND RECORDING MEDIUM RECORDED WITH PROGRAM FOR FLOW RATE CONTROLLER - A flow rate controller is provided that includes a setting flow rate shaping part that, in the case of receiving an input setting flow rate having a discontinuous point at which a target value discontinuously changes from a first target value to a second target value, outputs a shaped setting flow rate in which a continuously changing interval is inserted in place of the discontinuous point in the input setting flow rate; and a valve control part that controls a flow rate control valve opening so as to reduce a deviation between the shaped setting flow rate and a measured flow rate, wherein the setting flow rate shaping part is configured to, depending on the magnitude of an absolute deviation between the first target value and the second target value in the input setting flow rate, change a rate of change in target value in the continuously changing interval. | 03-20-2014 |
20140116538 | FLUID CONTROL SYSTEM - At a time when control of a flow rate adjusting valve is initiated from a fully closed state in order to make a measured flow rate equal to a target flow rate, an initial value of a driving signal is set as a parameter by making use of at least one of the type, pressure, and temperature of a fluid. | 05-01-2014 |
20140130905 | DUAL MODE ELECTRONIC FLOW CONTROL SYSTEM - In various embodiments, two or more electronic flow selectors of an electronic fluid flow control system may be used to control the flow rates of multiple fluids. In a total flow control mode, a first electronic flow selector may be used to select a total flow rate of two or more fluids. A second electronic flow selector may be used to select a flow rate or ratio of a flow rate of one fluid to the total flow rate of the two or more fluids. In a direct flow control mode, each electronic flow selector may be used to select a flow rate of a unique fluid. One of the fluids may be oxygen, and the other fluid, a balance gas, may be selected as either nitrous oxide or air using an electronic balance gas selector. | 05-15-2014 |
20140130906 | SYSTEMS AND METHODS FOR ELECTRONICALLY CONTROLLING THE FLOW RATES OF FLUIDS - In various embodiments, two or more electronic flow selectors of an electronic fluid flow control system may be used to control the flow rates of multiple fluids. In a total flow control mode, a first electronic flow selector may be used to select a total flow rate of two or more fluids. A second electronic flow selector may be used to select a flow rate or ratio of a flow rate of one fluid to the total flow rate of the two or more fluids. In a direct flow control mode, each electronic flow selector may be used to select a flow rate of a unique fluid. One of the fluids may be oxygen, and the other fluid, a balance gas, may be selected as either nitrous oxide or air using an electronic balance gas selector. | 05-15-2014 |
20140190578 | FLUID CONTROL VALVE AND MASS FLOW CONTROLLER - In order to, in a short period of time, reduce to zero a measured flow rate value measured after fully closing a fluid control valve, the fluid control valve having a configuration suitable to decrease the inside volume of the fluid control valve is configured together with a valve element member, and a valve seat block provided with: an in-valve flow path that is formed inside of the valve seat block; and a valve seat surface that is brought into contact with or separated from a seating surface of the valve element member is provided with a cutout that is formed in a part of a protruded rim so as to be communicatively connected to a downstream side flow path. | 07-10-2014 |
20140196802 | Fluid Leak Detection and Shutdown Apparatus - An apparatus and method for a fluid leak detection and shutdown for a fluid distribution system having a total system flow rate. The apparatus includes a solenoid shutoff valve having a normally open state and an activated closed state with a flow capacity matched to the total fluid distribution system flow rate. The apparatus also has a primary fluid flow line and a smaller capacity secondary fluid flow line. The apparatus includes a flow sensor in fluid communication with the secondary fluid flow line, wherein the flow sensor has a perceptible output and a flow rate capacity less than the solenoid shutoff flow capacity. Operationally, the flow sensor receives a portion of the solenoid shutoff valve flow capacity in priority over the primary fluid flow line, allowing the flow sensor to detect minimal flow rates and using the perceptible output to activate the solenoid shutoff valve into the closed state. | 07-17-2014 |
20140216572 | Microvalve with Integrated Flow Sensing Capability - A system for controlling the flow of a fluid from a source to a load includes a source. An on/off type of control valve communicates with the source. A micro-electric mechanical system communicates with the on/off type of control valve. A consuming device communicates with the micro-electric mechanical system. An electronic controller that communicates with the consuming device and the source. The electronic controller measures a change in a parameter of the micro-electric mechanical system that results from the flow of fluid through the micro-electric mechanical system to sense a flow of fluid through a micro-electric mechanical system. | 08-07-2014 |
20140299204 | REAL TIME DIAGNOSTICS FOR FLOW CONTROLLER SYSTEMS AND METHODS - A device that includes a flow controller system that comprises one or more sensors, a flow measurement sensor that comprises one or more sensors. The flow measurement sensor is configured to generate a signal based on determine the difference between the flow as measured by the flow controller system and the flow measurement system in real time. | 10-09-2014 |
20140366964 | REVERSE FLOW RELIEF VALVE - A bleed valve system includes a bleed valve, a valve regulator, a valve actuator and a reverse flow relief valve. The bleed valve is opened and closed to control a flow of bleed air from an upstream inlet to a downstream outlet. The valve regulator provides a servo pressure used to regulate the position of the bleed valve, and the valve actuator is mechanically connected to open/close the bleed valve based on the servo pressure provided by the valve regulator. The reverse flow relief valve compares a pressure upstream of the bleed valve to a pressure downstream of the bleed valve and in response to the downstream pressure exceeding the upstream pressure creates a fluid communication path between the servo pressure and an ambient pressure to decrease the servo pressure such that the bleed valve is closed. | 12-18-2014 |
20150129054 | HYDRAULIC CONTROL VALVE ASSEMBLY AND CONTROL SYSTEM FOR WATER SUPPLY NETWORKS - A modular hydraulic control valve assembly for use in a pilot-operated hydraulic control system comprises, in one embodiment, a control valve including a valve body defining a main flow passage from an inlet on a high pressure side of the control valve to an outlet on a low pressure side of the control valve, a valve member arranged in the flow passage and separating the high pressure side from the low pressure side, a control chamber comprising means for hydraulic actuation of the valve member by applying a control pressure to the control chamber so as to position the valve member between an open position and a closed position thereby adjusting a main flow through the main flow passage in response to the control pressure, a feed port for feeding fluid to the control chamber to increase the control pressure therein, a bleed port for bleeding fluid from the control chamber to decrease the control pressure therein, and a valve bonnet closing the control chamber. The assembly further comprises a feed check valve determining a feed flow direction, a bleed check valve determining a bleed flow direction, a distribution block including a common plenum, a control input in fluid communication with the common plenum, and a control output in fluid communication with the common plenum, wherein the distribution block further comprises a feed channel connecting the common plenum with the feed port via an adjustable feed constriction, and a bleed channel connecting the common plenum with the bleed port via an adjustable bleed constriction. | 05-14-2015 |
20150345711 | Surge-Based Flow Isolation System - An exemplary surge-based flow isolation system embodiment comprises a surge detection component, an automated isolation valve and a controller communicatively coupled to both. When the surge detection component senses a substantial change in a monitored variable associated with a fluid in a pipe, a signal is sent to the controller that, in turn, instructs the valve to isolate the flow. It is envisioned that the variable may be, but is not limited to being, flow rate or pressure. Advantageously, a surge-based flow isolation system may be able to shut off a supply pipe, such as a water supply pipe servicing a house, in the event that the pipe ruptures due to a freezing ambient environment. | 12-03-2015 |
20150369378 | Flow Rate Control Valve and Mass Flow Controller Using The Same - A flow rate control valve capable of eliminating an extra operation of a diaphragm spacer after a valve has become a closed state and shortening a response time is provided. It has an annular valve seat | 12-24-2015 |
20160131511 | Fluid Analysis Device, Thermal Flowmeter, Mass Flow Controller, Fluid Property Specification Device, and Program Recording Medium With Program for Fluid Analysis Device Recorded Thereon - The present invention is configured to, on the basis of an upstream side parameter having a value that is related to a change rate of an upstream side voltage when a flow rate of measuring target fluid changes, and a downstream side parameter having a value that is related to a change rate of a downstream side voltage when the flow rate of the measuring target fluid changes, calculate a fluid-specific value exhibiting a specific value depending on the thermal conductivity of the fluid. | 05-12-2016 |
20160187889 | SYSTEM FOR OPENING AND CLOSING PRESSURIZED FLUIDS - The present invention comprises of a system of opening and closing for pressurized fluids, that comprises of 3 modules;
| 06-30-2016 |
20160252913 | PRESSURE-TYPE FLOW CONTROLLER | 09-01-2016 |
137487000 | Control by pressures across flow line valve | 19 |
20100024901 | Relief valve - A relief valve in particular for relieving the super-atmospheric pressure in a tank for combustible liquids and comprising a pilot valve unit ( | 02-04-2010 |
20110226354 | Flow Controller - An system and method for flow control by controlling the output pressure for a liquid or a gas independently of the input pressure. | 09-22-2011 |
20120241022 | RELIEF VALVE DEVICE - The invention allows securing greater discharge pressure and flow rate at high revolutions of an engine in order to secure lubrication and cooling, while reducing discharge pressure and flow rate at low and medium revolutions of the engine in order to improve efficiency. The invention includes a housing; a relief valve; a valve passage; a main discharge flow channel; a main relief flow channel; an auxiliary relief flow channel; a solenoid valve mounted on the auxiliary relief flow channel; and a spring. The solenoid valve is controlled so as to switch between communication and shut-off between the auxiliary relief flow channel and the large-diameter passage section in accordance with an increase or decrease in engine revolutions, and oil in the large-diameter passage section is discharged when the shut-off is implemented. | 09-27-2012 |
20120241023 | CONTROL VALVE DEVICE - A control valve device develops opening/closing accuracy of a valve assembly. The valve head | 09-27-2012 |
20120291885 | Alternative Pressure Control for a Low Constant Pressure Injection Molding Apparatus - A low constant pressure injection molding machine forms molded parts by injecting molten thermoplastic material into a mold cavity at low constant pressures of 6,000 psi and lower. As a result, the low constant pressure injection molding machine includes a mold formed of easily machineable material that is less costly and faster to manufacture than typical injection molds. | 11-22-2012 |
20130092256 | FLOW RATE CONTROL DEVICE, DIAGNOSTIC DEVICE FOR USE IN FLOW RATE MEASURING MECHANISM OR FOR USE IN FLOW RATE CONTROL DEVICE INCLUDING THE FLOW RATE MEASURING MECHANISM AND RECORDING MEDIUM HAVING DIAGNOSTIC PROGRAM RECORDED THEREON FOR USE IN THE SAME - The flow rate control device is provided with: a fluid resistor provided on the flow channel; a pressure sensor provided in any one of an upstream side or a downstream side of the fluid resistor; a stable state judging part configured to judge, based on the measurement flow rate value or a measurement pressure value measured by the pressure sensor, whether or not a state of the fluid flowing through the flow channel is in a stable state; and an abnormality diagnosing part configured to diagnose an abnormality of the measurement flow rate value based on a variation amount of the measurement pressure value in the case where the stable state judging part judges that the state of the fluid is in a stable state. | 04-18-2013 |
20130092257 | FLOW RATE CONTROL DEVICE, DIAGNOSTIC DEVICE FOR USE IN FLOW RATE MEASURING MECHANISM OR FOR USE IN FLOW RATE CONTROL DEVICE INCLUDING THE FLOW RATE MEASURING MECHANISM AND RECORDING MEDIUM HAVING DIAGNOSTIC PROGRAM RECORDED THEREON FOR USE IN THE SAME - The flow rate control device is provided with: a fluid resistor provided on the flow channel; a pressure sensor provided in any one of an upstream side or a downstream side of the fluid resistor; a pressure calculating part configured to calculate a pressure in a side with respect to the fluid resistor where the pressure sensor is not provided; a flow rate calculating part configured to calculate a flow rate based on the measurement pressure value and a calculation pressure value calculated by the pressure calculating part; and an abnormality diagnosing part configured to diagnose an abnormality of the measurement flow rate value based on the measurement flow rate value and a calculation flow rate value. | 04-18-2013 |
20130092258 | FLOW RATE CONTROL DEVICE, AND DIAGNOSTIC DEVICE AND RECORDING MEDIUM RECORDED WITH DIAGNOSTIC PROGRAM USED FOR FLOW RATE CONTROL DEVICE - In order to be able to diagnose an abnormality occurring in a flow rate control valve with high reliability, and for example, if an abnormality occurs in the flow rate control valve, quickly perform appropriate maintenance or the like, a first measured flow rate diagnostic part that, on the basis of a second measured flow rate value or a measured pressure value, diagnoses an abnormality of a first measured flow rate value, and a valve diagnostic part that, when the first measured flow rate diagnostic part diagnoses that the first measured flow rate value has no abnormality, diagnoses an abnormality of the flow rate control valve are provided. | 04-18-2013 |
20130105007 | FLOW CONTROL VALVE | 05-02-2013 |
20130186486 | SYSTEM FOR AND METHOD OF MONITORING FLOW THROUGH MASS FLOW CONTROLLERS IN REAL TIME - A mass flow controller comprises: a first flow meter constructed and arranged to measured flow rate of mass through the mass flow controller; a second flow meter constructed and arranged to measure flow rate of mass through the mass flow controller; a control valve constructed and arranged so as to control the flow rate of mass through the mass flow controller in response to a control signal generated as a function of the flow rate as measured by one of the flow meters; and a system controller constructed and arranged to generate the control signal, and to provide an indication when a difference between the flow rate of mass as measured by the first flow meter and the flow rate of mass as measured by the second flow meter exceeds a threshold. | 07-25-2013 |
20130186487 | GAS PRESSURE REGULATING VALVE - A gas pressure regulating valve capable of regulating secondary pressure of a high-pressure fuel gas to a target pressure and preventing the fuel gas from leaking. An electromagnetic pressure regulating valve is an in tank type and can cause a valve body to move to adjust an opening degree of a valve passage. A diaphragm seal and a low-pressure sealing member respectively seal both sides of a bearing member slidingly supporting the valve body. The diaphragm seal receives the secondary pressure from a pressure return chamber. A back pressure chamber connected to a primary port is formed in the valve body by a seal rod inserted in the valve body. A communication passage connected to a secondary port is formed at a side of the seal rod, and a high-pressure sealing member seals between the communication passage and the back pressure chamber. | 07-25-2013 |
20130220451 | FLOW RATE RANGE VARIABLE TYPE FLOW RATE CONTROL APPARATUS - A pressure type flow rate control apparatus is provided wherein flow rate of fluid passing through an orifice is computed as Qc=KP | 08-29-2013 |
20140069527 | PRESSURE BASED MASS FLOW CONTROLLER - A mass flow controller (MFC) has a standard envelope with an enclosure and a corresponding base. A pressure transducer is communicatively coupled to a process gas in a proportional inlet valve without being physically coupled to the base. The space formerly occupied by the pressure transducer is available for additional component integration, or reduction of the standard envelope size. A second pressure transducer is located remotely and shared by multiple MFCs. A relief valve can quickly relieve a P1 pressure of a P1 volume of process gas. A first laminar flow element (LFE) and a second LFE and in series high conductance valve configured in parallel to produce a wide-range MFC that maintains accuracy. | 03-13-2014 |
20140190579 | System for and Method of Monitoring Flow Through Mass Flow Controllers in Real Time - A mass flow controller comprises: a first flow meter constructed and arranged to measured flow rate of mass through the mass flow controller; a second flow meter constructed and arranged to measure flow rate of mass through the mass flow controller; a control valve constructed and arranged so as to control the flow rate of mass through the mass flow controller in response to a control signal generated as a function of the flow rate as measured by one of the flow meters; and a system controller constructed and arranged to generate the control signal, and to provide an indication when a difference between the flow rate of mass as measured by the first flow meter and the flow rate of mass as measured by the second flow meter exceeds a threshold. | 07-10-2014 |
20140261783 | System and Method for a Diaphragm Valve Controlled Through Measurement of Water Pressure and Solenoid Opening Time - A flush valve system is provided having an inlet and an outlet, and a main valve element adapted for transition between a closed position and an open position is disclosed. The flush valve further includes a control chamber in communication with the inlet, and a vent outlet in communication with the outlet. The system includes a solenoid for establishing communication between the control chamber and the vent outlet to establish a pressure differential across a portion of the main valve element. The system also includes a power supply for energizing the solenoid, a deployable actuator in communication with the power supply, and a microprocessor in electrical communication with the main valve element. The microprocessor is adapted to determine a valve opening time, calculate fluid pressure based on the valve opening time, and deliver a predetermined quantity of fluid through the valve based on fluid pressure. | 09-18-2014 |
20150114491 | Automatic Flow Control System and Apparatus - A pilot valve assembly for use with a main valve apparatus coupled to a water pipe, includes a differential pilot valve apparatus, and first and second pilot valve apparatuses. An inlet of the differential pilot valve is coupled to a junction and an outlet is coupled to the first pilot valve apparatus. The differential pilot valve is responsive to a pressure differential to open the differential pilot valve apparatus for water to flow to the first pilot valve apparatus and to close the differential pilot valve apparatus to inhibit water flow to the first pilot valve apparatus. The second pilot valve apparatus is coupled to the junction to facilitate flow of water through the second pilot valve apparatus when the second differential valve member is in an open position. Adjustment mechanisms facilitate adjustment of the pressures responsive to which the first pilot valve member and the second pilot valve member close. | 04-30-2015 |
20150114492 | AUTOMATIC FLOW CONTROL SYSTEM AND APPARATUS - A pilot valve assembly for use with a main valve apparatus coupled to a water pipe, includes a differential pilot valve apparatus, and first and second pilot valve apparatuses. An inlet of the differential pilot valve is coupled to a junction and an outlet is coupled to the first pilot valve apparatus. The differential pilot valve is responsive to a pressure differential to open the differential pilot valve apparatus for water to flow to the first pilot valve apparatus and to close the differential pilot valve apparatus to inhibit water flow to the first pilot valve apparatus. The first pilot valve apparatus is responsive to a first pressure to close the first pilot valve to reduce flow of water therethrough. The second pilot valve apparatus is coupled to the junction to facilitate flow of water through the second pilot valve apparatus when the second differential valve member is in an open position. The second pilot valve apparatus is responsive to a second pressure to close the second pilot valve apparatus to reduce flow of water therethrough. | 04-30-2015 |
20150362924 | MASS FLOW CONTROLLER FOR IMPROVED PERFORMANCE ACROSS FLUID TYPES - Mass flow controllers and methods for improving the control of a flow of a variety of fluid types are 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 based upon the molecular mass for the selected process gas type. The operating characterization data is then used to operate a valve of the mass flow controller in open loop control mode. | 12-17-2015 |
20160139605 | CONTROL VALVE - A control valve including: a valve body, a flow shutter operatively interposed between an inlet and an outlet, a driving spindle having at least a first actuating end and a second end connected to the flow shutter. The valve also includes a differential pressure automatic regulation device, comprising: a cup-shaped body arranged around the driving spindle and axially mobile with respect to said driving spindle; a spring operatively interposed between the valve body and the cup-shaped body to push the latter away from the flow shutter; a rolling membrane having a radially inner edge fixed to the cup-shaped body and a radially outer edge fixed to the valve body to delimit a first chamber in fluid communication with the inlet and a second chamber in fluid communication with the outlet. | 05-19-2016 |