SQM50.264R2G3 Siemens Damper Motor

Overview

The Siemens SQM50.264R2G3 is a high-precision reversing motorized actuator designed for the accurate positioning of air dampers, flow control valves, and butterfly valves in industrial and commercial burner applications. As part of the SQM5 series, this electromotive actuator is engineered for durability and repeatability, making it an essential component for systems requiring a high degree of modulating accuracy. It features a robust design capable of operating in any mounting position and is particularly well-suited for integration with Siemens burner management systems like the LMV5 series.

Features

• Reversing capability allows for flexible control in both clockwise and counter-clockwise directions
• Integrated internal switches (up to six) that are easily adjustable for customized positioning
• High modulating accuracy and rotational resolution with low hysteresis
• Auto/manual selector switch and manual forward/reverse toggle for simplified adjustments and commissioning
• Durable, maintenance-free gearwheels and bearings housed in a rugged enclosure
• Externally visible shaft position indicator for quick status monitoring
• Field-exchangeable circuit boards and potentiometers provide versatile control options

Specifications

• Model: SQM50.264R2G3
• Operating Voltage: 220/240 Vac (50/60 Hz)
• Control Signal: 4 to 20 mA (Modulating)
• Torque: 90 in-lb (10 Nm)
• Running Time: 8 seconds (for 90 degree travel)
• Direction of Rotation: Counter-clockwise (CCW)
• Drive Shaft: 3/8 inch square shaft
• Protection Rating: IP54 (NEMA 1 equivalent)
• Ambient Temperature: -20 C to +60 C

Applications

• Precise modulation of air and gas dampers in industrial burner trains
• Positioning of butterfly valves and flow control valves for fuel-air ratio control
• Used in HVAC and boiler systems for comfort ventilation and air volume control
• Ideal for high-demand burner cycles requiring long-term reliability and precise feedback
• Suitable for use by OEMs for integration into specialized combustion equipment