SQM50.443A8 Siemens Damper Motor

Overview

The Siemens SQM50.443A8 is a high-precision reversing actuator designed for the accurate positioning of air dampers and gas valves in medium to large capacity oil and gas burners. Engineered for industrial and commercial burner applications, this robust motor provides reliable load-dependent control of combustion air, fuel oil, and gas. It features a die-cast aluminum housing and impact-resistant plastic covers, ensuring durability in demanding environments. The SQM50.443A8 is specifically designed for integration by original equipment manufacturers (OEMs) into burner systems requiring a high degree of modulating accuracy and repeatability.

Features

• Internal and external position indication for easy monitoring and setup
• Separately adjustable drive shaft and camshaft for precise configuration
• Manual disengagement mechanism for both the gear train and camshaft
• Reversible and locking-proof synchronous motor for enhanced safety
• Maintenance-free gearwheels and bearings for long-term reliability
• Impact-proof and heat-resistant plastic covers for durability
• Backlash-free gearing ensures high precision in control movements

Specifications

• Model: SQM50.443A8
• Operating Voltage: 24 VAC
• Torque: 140 in-lbs (15 Nm)
• Running Time: 25 seconds (for 90 degree rotation at 60 Hz)
• Auxiliary Switches: 4 internal switches (plus 2 limit switches)
• Drive Shaft: 9 mm square, double-ended
• Rotational Direction: Counterclockwise (default)
• Protection Rating: IP54 (NEMA 1, 2, 3, 3R, 3S, 5, 12, 13)

Applications

• Driving air or gas dampers in medium to large capacity oil and gas burners
• Load-dependent control of gas, oil, and combustion air in burner systems
• Positioning of flow control valves and butterfly valves
• Integration with modulating controllers or 3-position controllers (e.g., 4 to 20 mA signals)
• General industrial applications requiring precise rotary motion and high torque output