Siemens SQM40.261A21 actuator

Siemens SQM40.261A21 actuator: precise control of the burner air damper. Buying Siemens SQM40.261A21 means equipping your burner unit with a reliable, durable, and high-precision drive for air supply regulation. This model is widely used in combustion control systems and ensures an optimal fuel-air mixture ratio, which directly affects equipment efficiency and safety. Why is SQM40.261A21 needed? This actuator is designed to rotate air dampers and can also be used with gas and fuel valves. It operates under standard combustion automation controls: LAL, LOK, LFL, LGK, LME, and others. The main task of the drive is to move the damper to a strictly defined position depending on the burner operating mode (ignition, low or high power operation, purge). Technical specifications of Siemens SQM40.261A21 The Siemens SQM40.261A21 actuator is equipped with a reversing synchronous motor with stall protection. It develops a torque of 10 N·m, sufficient for reliable damper movement in medium and high power burners. The rotation time for 90 degrees is 30 seconds — a standard, optimal value for smooth air flow changes. The actuator operates from a standard 230 V AC mains. Shaft rotation is counterclockwise. For precise adjustment and feedback, one potentiometer is provided. The shaft design is a 10 mm shaft with a Woodruff key (flat). The housing has 6 switches (limit and auxiliary), allowing flexible adjustment of intermediate damper positions, for example, for ignition or low gas mode. Electrical connection is via convenient screw terminals located inside the housing. The actuator housing is...