Valve positioners can be classified into pneumatic valve positioners, electro-pneumatic valve positioners, and intelligent valve positioners based on their structure and working principle.
Valve positioners can increase the output power of control valves, reduce the occurrence of signal transmission lag, accelerate the movement speed of the valve stem, improve valve linearity, overcome valve stem friction, and eliminate the effects of unbalanced forces, thereby ensuring the correct positioning of the control valve.
