SQM40.245R11SC Siemens Actuator

Overview

The Siemens SQM40.245R11SC is a compact, electromotoric actuator designed for the precise positioning of air and gas dampers, butterfly valves, and oil pressure controllers in combustion systems. Engineered for use in medium to high-capacity oil and gas burners, this reversing actuator provides reliable rotary motion for load-dependent flow control. It is a self-supervising unit that can be controlled by modulating controllers or directly by burner controls, ensuring optimal efficiency and safety in thermal process plants.

Features

• High-torque output of 90 in-lb (10 Nm) for handling industrial dampers and valves
• Versatile control compatibility accepting 4 to 20 mA, 0 to 135 ohm, and 2 to 10 Vdc signals
• Integrated drive shaft disengagement clutch for quick manual alignment and servicing
• Robust NEMA 4 weatherproof enclosure suitable for challenging industrial environments
• Internal position indication with adjustable cams and scales for precise switching point setup
• Maintenance-free gear train with a designed lifetime of 250,000 start cycles

Specifications

• Model: SQM40.245R11SC
• Operating Voltage: 110V AC (50/60 Hz)
• Torque: 90 in-lb (10 Nm)
• Running Time: Approximately 25 to 30 seconds for 90 degrees
• Direction of Rotation: Counterclockwise (CCW)
• Shaft Type: 10mm D-shaft
• Input Signals: 4-20 mA, 0-135 ohm, 2-10 Vdc
• Certifications: UL listed and CSA certified

Applications

• Load-dependent control of gas, oil, and combustion air in industrial burners
• Precise positioning of butterfly valves and air dampers in HVAC and boiler systems
• Integration with Siemens burner controls such as the LMV5 or LME series
• Use in thermal process plants requiring high-precision rotary actuators
• Direct drive applications for oil pressure controllers and modulation assemblies