Electric flow control valve principle and control

1. The principle of electric flow control valve is to regulate the flow or fluid pressure and temperature. The normal feedback signal of the flow control valve is provided by independent information such as a flow meter or temperature meter.

2. Generally speaking, it is a regulating valve. Actuators and positioners are usually installed. Shut-off and diaphragm valves are also widely used for control purposes. In many industries, quarter-turn types such as regulating valves, ball valves, butterfly valves, and gate valves are used.

3, the control valve can also be operated with the hydraulic controller (also known as the hydraulic control valve). These types of valves are also referred to as automatic control valves. Their flow control principles are the same. The hydraulic actuator will respond to pressure or flow changes and will open/close the valve. The automatic control valve does not require an external power source and is itself fluid pressure sufficient to open and close the valve. Automatic control valves include: pressure relief valves, flow control valves, self-regulating valves, temperature control and relief valves. The tank level of a high pressure control valve. When the pressure is not high, it shuts off automatically and the pressure reaches its highest level and remains open. There is no external power on and off valve (electrically, pneumatically, or in need of people), it is done automatically, so its name is a self-supporting control valve.

4, electric flow control valve in a steam or fluid system, the flow of the pipeline is dozens or hundreds, even thousands, the control loop all connected to each other together to produce a product that can be sold. The purpose of these control loops is to allow some important process variables such as pressure, flow, water level, temperature, etc. In the required operating range, the quality of the final product is guaranteed. Each of these cycles receives disturbances of the process variables that are internally or adversely affected and interfere with the process variables that affect the interaction with other circuits after the cycle is completed.

5, flow control to achieve his principle also requires some external accessories, in order to reduce the impact of these load disturbances, sensors and transmitters collect information on the relationship between the process variable and some desired set-point. The controller will process this information and decide what must be done to get the process variable back to what it should be after a load disturbance occurs. When all measurements, comparisons, calculations, certain types of final control elements must implement the controller selection strategy. The most common final control element control valve in the fluid control industry. The control valve manipulates flowing fluids, such as gases, vapors, water, or chemical compounds, to compensate for load disturbances and adjust the process variables as closely as possible to the set point.