SQM41.244A21SC Siemens Actuator

Overview

The Siemens SQM41.244A21SC is a high-precision modulating actuator designed for the accurate positioning of air and gas dampers, butterfly valves, and flow control valves in burner applications. Engineered for both industrial and commercial use, this electronic actuator provides reliable rotary motion to ensure optimal combustion and airflow. It features a robust design with a NEMA 4 rated cover and is capable of handling load-dependent control in connection with modulating controllers or directly through burner controls.

Features

• High-resolution electronic operation for precise control
• Clockwise rotation with a 90-degree operating angle
• Adjustable limit and auxiliary switches for advanced control logic
• Manual shaft disengagement via coupling pin for easy alignment
• Durable die-cast aluminum lower housing and heat-resistant plastic cover
• Internal position indication with clearly marked scales for switch settings
• Zero and span adjustment for analog control flexibility

Specifications

• Model: SQM41.244A21SC
• Operating Voltage: AC 230 V (50/60 Hz)
• Torque: 90 in-lb (approx. 10 Nm)
• Run Time (90 degrees): 30 seconds
• Control Signal: 4-20 mA / 0-135 ohm / 2-10 Vdc
• Rotation: Clockwise (CW)
• Shaft Type: 3/8 inch Square Shaft
• Protection Rating: NEMA 4 / IP66
• Approvals: CE, UL, and CSA

Applications

• Load-dependent control of gas, oil, and combustion air in burner systems
• Positioning of butterfly valves and air dampers in HVAC systems
• Use in thermal process plants and industrial heating equipment
• Integration with Siemens burner controls like the LMV5 or LME series
• Precise flow control for systems requiring high turndown and reliable ignition proving