SQM50.464R1H3R Siemens Damper Motor

Overview

The Siemens SQM50.464R1H3 is a high-precision reversing actuator designed to provide accurate rotary motion for the positioning of air and gas dampers, flow control valves, and butterfly valves. Engineered for medium to large capacity oil and gas burners, this robust actuator ensures reliable load-dependent control of combustion air and fuel volumes. It features a die-cast aluminum housing and impact-resistant plastic covers, making it suitable for demanding industrial and commercial environments where modulating accuracy and repeatability are critical.

Features

• Reversing motor with field-reversible clockwise or counter-clockwise operation
• Integrated 135 Ohm potentiometer for precise position feedback
• Manual control via auto/manual selector switch and forward/reverse toggle switch
• Disengagement clutches for the drive shaft and cam drum to allow quick manual alignment
• Internal auxiliary switches (up to six) for versatile signaling and control configurations
• Low hysteresis gearing and externally visible position indication for enhanced monitoring
• Flexible mounting options including both base and face mounting connections
• Reversible and locking-proof synchronous motor for increased durability

Specifications

• Model: SQM50.464R1H3
• Torque: 140 lb-in (holding torque equivalent)
• Running Time: 25 seconds for a 90-degree stroke (at 60 Hz)
• Input Signal: 0 to 135 Ohm
• Angular Rotation: Adjustable up to 160 degrees (standard settings at 90 or 135 degrees)
• Power Supply: 110V AC / 120V AC (50/60 Hz)
• Drive Shaft: 3/8-inch square shaft
• Protection Rating: Designed for IP54 (with appropriate cable glands)
• Operating Temperature: -5 F to 140 F (-20 C to 60 C)

Applications

• Load-dependent control of gas flow, oil volume, and combustion air in industrial burners
• Precise positioning of dampers in HVAC and boiler systems
• Actuation of butterfly valves and flow control valves in combustion processes
• Integration with 3-position or modulating controllers (e.g., LMV5 or LME series)
• Use in applications requiring high modulating accuracy and repeatability for fuel-air ratio control