ZPD-2000 type electric - gas valve positioner is actuator pneumatic main supporting industrial automation instruments, can be used to improve the linearity of the valve position to overcome the friction and eliminate the effects of the stem valve unbalanced force, so as to ensure valve position by adjusting the meter to the 0 ~ 10mA.DC or 4 ~ 20mA.DC current signal proportional to the column relations and achieve proper positioning. 

     This series of products with pneumatic diaphragm actuator can also be equipped with gas piston actuator; with straight trip to the control valve, control valve stroke can also supporting role. And this product has electric - gas converters and pneumatic positioner dual function. Therefore, it is widely used in petroleum, chemical, metallurgy, power, textile, paper and other industrial automation, industrial automation instrument is an indispensable product yet.