Siemens SQN70.664B23 actuator

Siemens SQN70.664B23 actuator — reliable damper control for efficient combustion. The Siemens SQN70.664B23 actuator is a professional actuating device for automatic control of air and gas dampers in heating systems and burner equipment. It provides precise regulation of the fuel-air mixture composition and ventilation of the combustion chamber, opening and closing the damper strictly according to the boiler controller command. Model SQN70.664B23 is the current replacement for the previous generation SQN70.664A23 and is fully compatible — replacement is performed without any modifications. Where it is used: The actuator is intended for medium and low power burners operating on gas or liquid fuel. Widely used in boiler rooms, industrial and commercial heating systems, as well as in ventilation units with adjustable dampers. Technical specifications: Power supply: 220 V (–15% / +10%), 50/60 Hz. Torque: 2.5 Nm. Power consumption: 6 VA. Adjustment angle: 0–130°, maximum rotation angle: 160°. Opening time for 90°: 30 seconds. Built-in position indication. Design advantages: The reversing synchronous motor provides rotation both clockwise and counterclockwise. The camshaft ensures precise damper positioning. The design includes two limit switches and additional switches with manual adjustment. Connection is made via convenient screw terminals. The housing made of heat-resistant plastic protects internal components from mechanical impacts and high temperatures, and the wear-resistant steel drive shaft ensures durability in intensive operating modes. Why choose this model: Siemens is a recognized global standard in burner system automation.