Valve positioner pneumatic actuator accessories

Supporting the use of it with a pneumatic actuator is used to improve the accuracy of the position of the valve, overcoming stem friction and impact of the media unbalanced force, and thus ensure that the valve in accordance with the signal of the regulator to achieve the correct positioning.
With locator under the following circumstances:
1, the media pressure, a large pressure difference;
2, the control valve large caliber (DN 100);
3, high or low temperature regulating valve;
4, the need to improve the operation speed of the valve is adjusted;
5, with the standard signal, the operation nonstandard spring executive agency other than the spring range (20 ~ 100KPa);
6 for the sub-process control;pneumatic auto drain
7, the valve reverse action (air to close and gas open mutual conversion);
8, need to change the flow characteristics of the valve (which can change the positioning cam);flange solenoid valve
9, the spring actuator or piston actuator, to achieve proportional action;
10, the electrical signal to operate the pneumatic actuator must distribution - pneumatic valve positioner.direct acting solenoid valve