Valve Positioner

Valve positioner, according to the structure, is divided into pneumatic valve positioner, electro-pneumatic valve positioner and intelligent valve positioner. It is the main accessory of the control valve and is usually used in conjunction with the pneumatic control valve. It accepts the output signal of the regulator, and then uses it The output signal of the control valve is used to control the pneumatic control valve. When the control valve acts, the displacement of the valve stem is fed back to the valve positioner through a mechanical device, and the valve position is transmitted to the upper system through an electrical signal.