Pneumatic valve positioner use more widely, it is a kind of electrical signal will be converted into pressure signal conversion device, with compressed air or nitrogen source for work to control the industrial furnace control valve of the opening size, widely used in industrial furnace temperature automatic control system for pneumatic valve actuator continuous control. But the pneumatic valve positioner operation, can cause air usage partial nervous, area of the nitrogen consumption remains high.

After a series of design and experiment, now developed a new type of valve positioner. USES the current advanced "pilot valve" energy saving technology, its built-in voltage regulator can fully eliminate for gas circuit pressure change on locator action influence, again complementary with microprocessor intelligent control and other advanced technology to realize the process control points, so that the valve positioning apparatus has good linearity, sensitivity and lag degrees, at the same time will work gas consumption down to a minimum, than ZPD series valve positioner to low more than half, and the price is lower than the same product category and nearly about half. This valve positioner is a kind of high cost performance products, to reduce the use of great social-fixed-asset line nitrogen consumption has great practical value and value of popularization.