SQM41.241R11SC Siemens Actuator

Overview

The Siemens SQM41.241R11SC is a high-precision, electromotoric modulating actuator designed for the accurate positioning of air dampers, oil pressure controllers, butterfly valves, and other rotary motion applications in burner systems. Engineered for industrial and commercial use, this cost-effective actuator provides reliable load-dependent control of gas, oil, and combustion air. The unit is specifically designed for clockwise (CW) rotation and features a robust NEMA 4 weatherproof enclosure, making it suitable for demanding environments without the need for additional weather shields.

Features

• High torque output of 90 in-lb (10 Nm) for reliable operation of heavy-duty dampers and valves
• Versatile modulating input accepts 4 to 20 mA, 0 to 135 ohm, and 2 to 10 Vdc control signals
• NEMA 4 rated enclosure provides protection against dust and water, allowing for mounting in any orientation
• Integrated drive shaft disengagement clutch allows for quick manual alignment during installation or maintenance
• Internal position indication and adjustable cams for precise switching point control
• UL listed and CSA certified for compliance with North American safety standards
• Stall-proof synchronous motor ensures consistent performance and long service life

Specifications

• Model: SQM41.241R11SC
• Operating Voltage: AC 110 V (50/60 Hz)
• Rotation Direction: Clockwise (CW)
• Torque: 90 in-lb (10 Nm)
• Running Time: 30 seconds for 90 degrees (at 60 Hz)
• Control Signals: 4-20 mA, 0-135 ohm, 2-10 Vdc
• Shaft Type: 10 mm keyed shaft
• Enclosure Rating: NEMA 4
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 4.0 lbs

Applications

• Load-dependent control of combustion air, gas, and oil flow in medium to high-capacity burners
• Positioning of butterfly valves and dampers in thermal process plants
• Use in conjunction with 3-position or modulating controllers and burner controls like the Siemens LMV series
• Industrial and commercial HVAC boiler systems requiring precise rotary motion
• Applications where separate positions for burner ignition and low fire are required through auxiliary switches