Siemens SQN31.121A2760 actuator

Precision servo actuator Siemens SQN31.121A2760 for burner air dampers. Fast and accurate fuel-air ratio control. Siemens SQN31.121A2760 is a reliable electromechanical actuator (servomotor) for professional air damper control in burner automation. This model is a benchmark of speed and accuracy: it opens the damper 90° in just 4.5 seconds. If you need to ensure stable ignition, precise air dosing in all burner operating modes, and safe combustion chamber purge, SQN31.121A2760 is the optimal solution for your boiler room or industrial equipment. Key advantages: Lightning-fast speed — rotation time for 90° is only 4.5 seconds. This ensures quick burner startup and instant air shut-off during shutdown, which is critical for modulating burners. Precise adjustment and control — equipped with two limit switches and one auxiliary switch. Adjustment of limit position cams is intuitive and requires no special tools, allowing precise setting of "closed" and "open" positions. High reliability and easy installation — the gearbox is maintenance-free (lubricated for life). If necessary, the shaft can be easily disconnected from the gearbox manually by pressing a pin — this simplifies initial damper adjustment. Flexibility of application — the actuator can be controlled directly from standard Siemens burner controls (LOA, LMO, LMG, LFL) or together with P-PI and PID controllers for smooth maintenance of the set mode. Motor protection — the synchronous motor has stall protection, preventing device failure in case of damper mechanism jamming. Technical specifications: Model: SQN