The Siemens Combustion SQM50.481R1 Damper Actuator Motor is a precision rotary actuator designed to control air and gas dampers in medium- to large-capacity burners. It operates by converting electrical control signals into accurate rotary movement, positioning dampers to regulate combustion air and fuel flow. Commonly used in commercial boilers, industrial burners, and combustion HVA... https://www.partshnc.com/siemens-combustion-sqm50-481r1-damper-actuator-motor