The valve positioner is the main accessory of the control valve. It takes the valve stem displacement signal as the input feedback measurement signal and the controller output signal as the setting signal for comparison. When there is a deviation between the two, it changes the output signal to the actuator to make the actuator act, and establishes the corresponding relationship between the valve stem displacement and the controller output signal. Therefore, the valve positioner constitutes a feedback control system with valve stem displacement as the measurement signal and controller output as the setting signal. The control variable of the control system is the output signal from the valve positioner to the actuator.

l  I / p version of all pneumatic or intrinsically safe / explosion-proof type

l  Internal heating dehumidification belt over belt protection

l  High quality aluminum alloy shell, corrosion resistant coating

l  Three break protection function