SQM40.261R11SC Siemens Actuator

Overview

The Siemens SQM40.261R11SC is a high-precision electromotoric actuator designed for the accurate positioning of flow control valves, butterfly valves, and dampers in industrial and commercial burner applications. This robust, counterclockwise-rotating unit is part of the SQM4 series, engineered to provide load-dependent control of gas, oil, and combustion air. It features a synchronous motor and a drive shaft that can be manually disengaged for easy alignment during installation.

Features

• Counterclockwise (CCW) direction of rotation
• High-resolution electronic operation for precise positioning
• Internal position indication and adjustable limit and auxiliary switches
• Drive shaft disengagement clutch for manual alignment and service
• Durable NEMA 4 weatherproof enclosure with a die-cast aluminum lower housing
• Impact-proof and heat-resistant plastic housing cover
• UL and CSA certification for North American safety standards

Specifications

• Model: SQM40.261R11SC
• Operating Voltage: AC 110V (50/60 Hz)
• Rated Torque: 90 in-lb (10 Nm)
• Running Time: 30 seconds for 90 degrees
• Control Type: Line 3P-Step (3-position floating)
• Shaft Type: 10mm Keyed Shaft
• Protection Rating: NEMA 4 (IP66 equivalent)
• Operating Temperature: -20 C to +60 C

Applications

• Supervision and control of air and gas dampers in medium to high-capacity burners
• Positioning of oil pressure controllers and butterfly valves
• Use in thermal process plants for combustion air regulation
• Integration with burner control systems like the Siemens LMV5 or LME series
• Load-dependent control in HVAC and industrial boiler systems