Pneumatic valve positioner is the main supporting instrument of pneumatic actuator. It is used to improve the linearity of valve position, overcome the friction of valve stem and eliminate the influence of unbalance of the regulating valve, so as to ensure the valve position and the standard air pressure signal of 0.02 ~ 0.1MPa Proportional relationship. It is an important part of the industrial automation pneumatic control system. EP-1200 series pneumatic valve positioners are widely used in the pressure holding system of mud water shield and earth pressure shield.

1. The use of earthquake-resistant reinforced structure makes it very stable in the scene with high vibration.
2. Fast response and accurate positioning.
3. It can realize 1/2 split-range control by simply replacing parts.
4. The air consumption is small and the energy saving is good.
5Convenient and fast conversion between positive and negative effects.
6 The adjustment of zero point and range is simple and easy to use.
7 Quick feedback connection.