SQM33.511A9 Siemens Actuator

Overview

The Siemens SQM33.511A9 is a high-precision electromotoric rotary actuator designed to drive and position gas dampers, air dampers, and oil control valves in burner systems. Engineered for use with Siemens burner controls such as the LMV2 and LMV3 series, this actuator ensures accurate fuel-air ratio control for improved burner performance and safety. It features a robust die-cast aluminum housing and is suitable for industrial and commercial combustion applications.

Features

• High-precision stepper motor allows for accurate positioning and reliable operation
• Integrated optical feedback system ensures consistent performance without mechanical wear
• Self-holding torque provides stability when the actuator is at a standstill
• Gear train is permanently lubricated and maintenance-free for long-term service
• Compact design with a durable plastic cover and metalized interior to prevent static interference
• Integrated 3.6-meter connection cable with RAST2.5 connectors for simplified installation

Specifications

• Torque: 3 Nm nominal output torque
• Running Time: 5 to 120 seconds for 90 degrees (dependent on the basic unit)
• Supply Voltage: AC 24 V (via burner control)
• Power Consumption: 10 W
• Protection Rating: IP54
• Rotation: Clockwise and counterclockwise capability
• Shaft Diameter: 10 mm
• Cable Length: 3.6 meters

Applications

• Precise positioning of air dampers for combustion air control
• Modulation of gas and oil control valves in industrial burners
• Use with Siemens LMV26, LMV27, LMV36, and LMV37 linkageless burner management systems
• Integrated fuel-air ratio control for high-efficiency boilers and heating equipment