SQM41.245R11SC Siemens Actuator

Overview

The Siemens SQM41.245R11SC is a high-precision, electromotoric modulating actuator designed for the accurate positioning of air and gas dampers, butterfly valves, and other components requiring rotary motion. Part of the SQM4 series, this Synchro actuator is engineered for reliability in demanding industrial and commercial combustion environments. It features a NEMA 4 rated weatherproof enclosure and allows for universal mounting, eliminating the need for complex linkages to maintain specific orientations.

Features

• Modulating control compatible with 4-20 mA, 0-135 ohm, and 2-10 VDC signals
• Clockwise (CW) rotation direction
• Integrated manual override with a lever-actuated clutch for easy servicing and alignment
• Robust industrial gear train designed for a lifetime of 250,000 start cycles
• Internal position indication for precise feedback
• NEMA 4 / IP66 rated enclosure for protection against harsh environmental conditions
• UL and CSA approved for use in North American markets

Specifications

• Torque Output: 90 in-lb (10 Nm)
• Running Time: 30 seconds for 90 degrees
• Operating Voltage: 110V AC (50/60 Hz)
• Drive Shaft: 10mm D-shaft
• Rotation Angle: Adjustable up to 90 degrees
• Auxiliary Switches: Up to 6 internal switches available depending on configuration
• Enclosure Rating: NEMA 4

Applications

• Load-dependent control of gas, oil, and combustion air flow
• Driving butterfly valves and dampers in medium to high-capacity burners
• Thermal process plants and heating systems requiring precise air-to-fuel ratio control
• Boiler systems and commercial ventilation assemblies
• Direct operation by burner controls or in connection with 3-position or modulating controllers