The Johnson Controls VA-7150-1001 is a 3-wire incremental electric valve actuator designed for precise flow control in HVAC hydronic systems. Operating on 24V power, it adjusts valve position in incremental steps based on control signals to regulate heating or cooling water flow accurately. This actuator is commonly used with control valves in air handling units, fan coil units, chill... https://www.partshnc.com/24v-3wire-incremental-elec-act