A flow control valve includes a body having a body bore oriented coaxially with a longitudinal axis of the body and a seat member extending into the bore. A valve member is slidably disposed in the bore and oriented coaxially with the longitudinal axis of the body. The valve member includes a non-circular geometrically shaped head having a bore. A drive adapter includes a head receiving cavity slidingly receiving the geometrically shaped head of the valve member and preventing axial rotation of the valve member. A stepper motor is connected to the drive adapter, the stepper motor incrementally rotating a shaft engaged with the bore of the valve member. First and second equal diameter pistons of the valve member provide pressure balanced valve member operating positions.

Stepper motor operated balanced flow control valve

The system for controlling flow characteristics allows a user to selectively modify the inherent fluid flow characteristics of a fluid transmission system including a flow process controller and a control valve positioner. The system includes a programmable flow controller having an input adapted for receiving an input signal from the flow process controller. The programmable flow controller selectively modifies the input signals generated by the flow process controller depending upon user-selectable flow parameters. An output is in communication with the programmable flow controller, with the output being adapted for transmitting output signals to the control valve positioner (and the valve connected thereto). A user interface is provided for inputting the user-selectable flow parameters to the programmable flow controller for modification of the input signal to the user-selectable flow parameters.

System and method for controlling flow characteristics

An in-line flowmeter for large diameter pipes includes an outer pipe with a diameter equal to that of the pipe to which it is coupled and an inner measuring tube carrying a portion of the flow, the flow through the measuring tube being sensed by a flowmeter associated with the measuring tube and with the total combined flow rate out of the in-line flowmeter calculated from the sensed flow through the measuring tube.

Flowmeter design for large diameter pipes

A turbine wheel flow measuring transducer located in a fluid receiving chamber is provided for measuring low flow rates of fluids, whether liquids, gases, or mixtures, and in controlling the fluid flow rates, The transducer is in the form of a small diameter turbine wheel having a plurality of semi-circular lateral openings in its outer periphery. The openings are sequentially presented to the incoming fluid into the chamber and the turbine wheel rotates according to the fluid flow rate. Measuring and controlling of fluid flow rates as low as 4-5 milliliters per minute and as high as 100 milliliters per minute is permitted.

Low flow rate measurement and control

The invention discloses a flow control method and device. The method comprises the following steps of S1, according to a given flow rate, calculating and determining a control amount through a flow rate control meter, and controlling the flow rate of pumping equipment according to the control amount; S2, when it is detected that the deviation between the actual flow rate of the pumping equipment and the given flow rate is greater than a preset range, calculating a fine regulation control amount through the flow rate control meter, and correcting the control amount. The flow control method anddevice have the advantages of high control precision, high response speed, stable control and the like.

Flow control method and device

A flow system includes a proportional valve constructed of chemically inert materials (PTFE) to produce variable fluid flow rates of liquids including inert, and high purity, and even highly corrosive liquids. Gases of many varieties can also be flow controlled. The valve may be precisely set, either manually, or by use of an actuating motor, remotely or electronically, for various flow rates for the required fluid. The valve allows for specific proportional flow parameters to be programmed into valve structure and configuration to provide precise and repeatable highest resolution flow control for a wide variety of complex flow conditions (pressure, temperature and viscosity).

Flow system with high resolution proportional valve with customizable performance

The embodiments herein discloses a linear seal system for interconnecting flow controller modules in a fluid flow controller. The system comprises a flow sensing module is coupled to an inlet connection module to measure a fluid flow rate to generate a sensor output signal. A flow control valve module is coupled to the flow sensing module to provide a user desired flow rate through an outlet connection module. An electronic control system is configured to regulate an operation of the flow sensing module and the flow control valve module based on the command signal to achieve a desired flow rate. A linear track system provided to support all the modules in a linear arrangement, includes a dovetail locking configuration. The linear track has two rod/screws to compress the seals between the modules.

Reconfigurable modular fluid flow control system for liquids or gases

Flusssteuerung
fur ein
Fluid, die das Folgende umfasst: Einen Gehausekorper; eine Flusszufuhrung in
dem Gehausekorper; eine
Flussabfuhrung
in dem Gehausekorper; eine
Flussaufnahmekammer, die in dem Gehausekorper zwischen der Flusszufuhrung und
der Flussabfuhrung
angeordnet ist; ein einstellbares Trennwandelement entlang
eines Abschnitts der Flussaufnahmekammer; und einen Aktuator,
der die Position des einstellbaren Trennwandelements steuert, um
den Fluidfluss durch den Gehausekorper zu
regeln

Edwin L. Georgetown Hankinson

Papers

Flow system with high resolution proportional valve with customizable performance

Reconfigurable modular fluid flow control system for liquids or gases

Flusssystem mit Hochauflösungsproportionalventil mit anpassbarer Leistung