SQM41.144R11SC Siemens Actuator

Overview

The Siemens SQM41.144R11SC is a high-precision, electromotoric modulating actuator designed to control the flow of gas, oil, or combustion air in industrial and commercial burner systems. This synchronous motor-driven unit provides reliable rotary motion for positioning flow control valves, butterfly valves, and dampers. As part of the SQM4 series, it is engineered for load-dependent control and is compatible with modulating controllers or direct integration into burner control systems.

Features

• Clockwise rotation (CW) for precise valve and damper adjustment
• NEMA 4 rated weatherproof enclosure allows for mounting in any orientation without additional shields
• Integrated drive shaft disengagement clutch for quick manual alignment during installation or maintenance
• Electronic version supporting multiple analog control signals including 4-20 mA and 0-135 ohm
• Internal position indication and adjustable limit and auxiliary switches for enhanced operational control
• Durable construction with a die-cast aluminum lower housing and impact-resistant plastic cover

Specifications

• Model: SQM41.144R11SC
• Operating Voltage: AC 110V (50/60 Hz)
• Torque: 45 in-lb (5 Nm)
• Running Time: 15 seconds for 90 degrees
• Shaft Type: 3/8 inch Square Shaft
• Control Input: 4-20 mA / 135 ohm / 2-10 Vdc
• Rotation: Clockwise (CW)
• Approvals: UL and CSA listed

Applications

• Precise control of combustion air, gas, and oil flow in medium to high-capacity burners
• Positioning of butterfly valves and air dampers in HVAC and thermal process plants
• Suitable for both industrial and commercial heating systems requiring high turndown and reliable ignition
• Ideal for use with Siemens burner controls such as the LME or LMV series for safety-related applications