The Siemens Combustion SQM40.215R11 Actuator is an electrically operated rotary actuator designed to provide precise positioning of air and gas dampers, butterfly valves, and flow control valves. Operating on a 110V power supply, it responds to 0–135 ohm control signals to regulate actuator movement and adjust combustion airflow or fuel flow. Commonly used in commercial and industrial... https://www.partshnc.com/sqm40-215r11-siemens-combustion-0-135ohm-110v-actuator