Electronic stepping actuator for screw chiller compressor capacity control. It receives 0-10V control signal from chiller controller to drive the slide valve, changing compressor loading ratio continuously. Built-in position feedback sensor returns real-time valve status to main control board, forming closed-loop capacity regulation to stabilize chilled water temperature.

Certification: CE, UL

Stepper motor, reduction gear set, position feedback potentiometer, drive circuit board and mounting bracket. Common faults: motor stalling, feedback signal loss, gear wear, connector poor contact and slide valve stuck.