SQM41.261R11 Siemens Actuator

Overview

The Siemens SQM41.261R11 is a high-precision electromotoric rotary actuator designed for the load-dependent control of gas, oil, and combustion air flow. Specifically engineered for industrial and commercial burners of medium to high capacity, this clockwise-rotating actuator is typically used to drive butterfly valves, dampers, and oil pressure controllers. Its robust design features a synchronous motor and a die-cast aluminum lower housing, making it ideal for thermal process plants and complex combustion systems.

Features

• Clockwise direction of rotation (90 degree)
• Synchronous motor drive with high resolution for precise positioning
• Disengageable drive shaft via a manual coupling pin for easy adjustment and maintenance
• Adjustable limit and auxiliary switches with clearly marked scales for switching point angles
• Impact-proof and heat-resistant plastic housing cover
• Internal position indication and zero/span adjustment on electronic versions
• UL and CSA approved for use in North American markets, requiring flexible conduit connections

Specifications

• Model: SQM41.261R11
• Operating Voltage: AC 120 V (50/60 Hz)
• Torque Rating: 10 Nm (approximately 90 in-lb)
• Running Time: 30 seconds for 90 degrees
• Shaft Type: 10mm diameter with Woodruff key
• Auxiliary Switches: 3 integrated switches
• Potentiometer: Single 1000 Ohm 90-degree potentiometer
• Protection Rating: NEMA 4 / IP66
• Operating Temperature Range: -20 C to +60 C
• Power Consumption: 10 VA

Applications

• Load-dependent control of gas, oil, and combustion air in industrial burners
• Driving air and gas dampers in HVAC and thermal process plants
• Controlling butterfly valves and oil pressure controllers in medium to large capacity burner systems
• Integration with 3-position or modulating controllers (e.g., 4-20 mA) and burner management systems like the Siemens LME or LMV series