SQM50.264R1G8 Siemens Damper Motor

Overview

The Siemens SQM50.264R1G8 is a high-precision reversing actuator designed for the accurate positioning of dampers and valves in burner and combustion applications. Engineered for industrial and commercial use, this motor provides reliable rotary motion to control the flow of gas, oil, or combustion air. It features a robust design with a 3/8 inch square dual-ended shaft and is capable of providing 90 in-lbs of torque, making it a critical component for systems requiring high modulating accuracy and repeatability.

Features

• Internal auto/manual toggle switch for easy commissioning and adjustments
• Externally visible position indicator for quick status monitoring
• Low hysteresis gear train with double-offset drive ensures precise control
• Equipped with two limit switches and four adjustable auxiliary switches
• Modular design allows for field-exchangeable circuit boards and potentiometers
• Counterclockwise (CCW) rotation when facing the driveshaft
• Durable housing suitable for various mounting positions

Specifications

• Model: SQM50.264R1G8
• Torque: 90 in-lbs
• Running Time: 8 seconds for 90 degree rotation (at 60 Hz)
• Operating Voltage: 110-120 VAC
• Control Input: 4-20 mA via integrated circuit board
• Feedback: 1000 Ohm potentiometer (135 degree)
• Shaft Type: 3/8 inch square, dual-ended
• Rotation: Counterclockwise (CCW)
• Operating Temperature: -4 F to 140 F (-20 C to 60 C)
• Protection Rating: NEMA 1, 2, 3, 3R, 4, 12, and 13 (depending on configuration)

Applications

• Positioning of air and gas dampers in industrial burner systems
• Control of flow valves, butterfly valves, and oil volume regulators
• Load-dependent control of combustion processes in HVAC and boiler systems
• Suitable for use with advanced burner management systems like the Siemens LMV5 series
• Industrial furnaces and large-scale commercial heating equipment