SQM50.450R1A Siemens Damper Motor

Overview

The Siemens SQM50.450R1A is a high-precision reversing rotary actuator designed for the accurate positioning of dampers, flow control valves, and butterfly valves. Part of the robust SQM5 series, this electromotive actuator is engineered for industrial and commercial burner applications where reliable air and fuel ratio control is critical. It features a die-cast aluminum housing and a synchronous motor, providing a durable solution for modulating accuracy and repeatability in high-demand HVAC and combustion systems.

Features

• Reversing rotary motion suitable for various flow control applications
• Internal, easily adjustable limit and auxiliary switches for precise control
• Field-exchangeable circuit boards and potentiometers for enhanced versatility
• Externally visible shaft position indicator for simplified monitoring and setup
• Disengagement clutches for separate adjustment of the drive shaft and cam stack
• UL recognized, CSA certified, and CE approved for international compliance
• Low hysteresis drive system ensures stable performance and accurate response

Specifications

• Model: SQM50.450R1A
• Operating Voltage: 110-120 VAC (50/60 Hz)
• Torque: 140 lb-in (approx. 16 Nm)
• Running Time: 25 seconds for 90 degree rotation at 60 Hz (30 seconds at 50 Hz)
• Number of Switches: 2 limit switches and 3 auxiliary switches (total of 5 switches)
• Rotational Direction: Counterclockwise (facing the driveshaft)
• Shaft Design: No shaft included (requires separate AGA58 series shaft)
• Operating Temperature: -4 F to 140 F (-20 C to 60 C)
• Protection Rating: NEMA 1, 2, 3, 3R, 4, and 12 (IP54)

Applications

• Supervision and control of air and gas dampers in industrial burners
• Precise positioning of fuel-to-air ratio flow control valves
• Integration into VAV systems and large-scale ventilation dampers
• Use with Siemens burner controls or third-party building automation systems
• Suitable for replacement of competitive actuators in retrofit projects