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Shanghai Dongfeng pump valve factory is a professional manufacturer of electric control valve, pneumatic control valve, self operated control valve, temperature control valve, flow control valve and other products!
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Company name: Shanghai Dongfeng pump valve factory

Address: 459 guchen Road, Baoshan District, Shanghai

Enterprise telephone: 021-60547555

Enterprise Fax: 021-60547555

Mobile: 185-2135-0330

Contact person: Manager Hu

Website: http://expansecms.com/

Email: 792894571@qq.com

The working principle of control valve positioner

Source: Manufacturer of electric control valve Release time: June 17, 2020 17:23

When the electromagnetic torque generated by the input signal is equal to the positioner generated by the feedback system, the force balance system of the positioner is in equilibrium, and the positioner is in a stable state, and then the input signal is proportional to the position of the valve.
 The working principle of control valve positioner
When the input signal changes or changes, for example, the balance of the force balance system of the dielectric force force is broken, the force imbalance state of the valve stem position change caused by the magnetoelectric force and feedback circuit, the output air pressure of the nozzle baffle and the positioner changes, the air chamber pressure changes, the actuator drives the actuator to move, and the position of the valve rod changes to the new position, corresponding to the input signal, A new balance has been reached. By changing the structure of the feedback lever (such as cam curve) of the positioner in use, the positive, reverse and flow characteristics of the electric control valve can be changed, and the performance of the electric control valve can be improved.
 HD Photo of electric control valve