Electric regulating valve is an important execution uni […]
Electric regulating valve is an important execution unit instrument in industrial automation process control. With the increasing degree of automation in the industrial field, it is being used more and more in various industrial production fields.
By receiving the signal from the industrial automation control system, the valve is driven to change the cross-sectional area between the valve core and the valve seat to control the flow, temperature, pressure and other process parameters of the pipeline medium. Realize automatic adjustment function.
The electric single-seat regulating valve is composed of a straight-stroke full-electronic electric actuator and a top-guided straight-through low-flow resistance single-seat valve. It has compact structure, light weight, sensitive action, S-streamline fluid channel, small pressure drop loss, large valve capacity, excellent flow characteristics, and directly accepts 4-20mA DC 0-10mA DC or 1-5V DC input from the regulating instrument, etc. The control signal and single-phase power supply can control the operation, realize the automatic adjustment and control of the fluid medium of the process pipeline, and are widely used to control the process parameters of gas, liquid, steam and other media such as pressure, flow, temperature, liquid level and other parameters remain at the given value.
The flow characteristic of the electric control valve is the relationship between the relative flow of the medium flowing through the electric control valve and its opening degree under the condition that the pressure difference between the two ends of the valve remains constant. The flow characteristics of the electric regulating valve are: linear characteristics, equal percentage characteristics and parabolic characteristics.
Electric double seat regulating valve installation
The electric regulating valve is most suitable to be installed as the upper end of the working piston is at the lower part of the horizontal pipeline. The temperature sensor can be installed in any position and the entire length must be immersed in the controlled medium.
Electric control valves generally include a driver, which accepts the driver signal to control the valve for adjustment, and can also form an intelligent network control system according to the control needs to optimize the control to achieve remote monitoring.