Careful selection of control valves
The regulating valve, also known as the control valve, is the main type of actuator. By accepting the control signal output from the regulating control unit, the fluid flow is changed by the power operation. The regulating valve is generally composed of an actuator and a valve. If the power is used according to the actuators it is equipped with, the regulating valve can be divided into three types: pneumatic, electric and hydraulic. The pneumatic regulating valve with compressed air as the power source and the electric regulating valve with electric power as the liquid medium Electrohydraulic control valves such as oil and other power are also available. In addition, according to their functions and characteristics, there are solenoid valves, electronic, intelligent, field bus type regulating valves. Regulators are available in many different types and configurations, and are constantly being updated and changed. Valves are generally versatile and can be matched to pneumatic actuators or to electric actuators or other actuators.
The choice of regulating valve is very meticulous work, not only has a solid professional theoretical knowledge, but also has a wealth of practical experience. Choosing well not only helps to adjust the tuning of the PID parameters of the control loop, so that the adjusted parameters get better control effect, and the service life of the regulating valve is greatly increased. The choice of regulating valve should be adapted to local conditions, not constant, and must be summarized and innovated in the process of practice. Especially with the application of mechatronics technology, computer and digital information technology, the structural function of the regulating valve becomes better and more comprehensive. It provides great convenience for selecting the regulating valve.
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