SQM33.510A9 Siemens Actuator

Overview

The Siemens SQM33.510A9 is a high-precision electromotoric actuator designed for the driving and positioning of air dampers and control valves in oil and gas burners. Engineered for use with electronic fuel-air ratio controls, such as the Siemens LMV2 and LMV3 systems, this stepper motor-driven actuator ensures optimal combustion efficiency and reliable operation. Its robust construction features a die-cast aluminum housing and an impact-resistant plastic cover, making it suitable for demanding industrial and commercial heating environments.

Features

• Stepper motor drive provides high-resolution positioning and precise control
• Integrated optical feedback system ensures accurate position monitoring without mechanical wear
• Self-holding torque prevents unwanted movement of dampers due to fan airflow when powered
• Internal spur gears are made of steel and plastic, permanently lubricated for maintenance-free operation
• RAST2.5 connector system with a pre-installed 1.5-meter cable for simplified electrical installation
• Clockwise and counterclockwise rotation can be selected via the burner control unit

Specifications

• Model: SQM33.510A9
• Rated Output Torque: 3 Nm
• Holding Torque (Live): 3 Nm
• Holding Torque (Dead): 2.6 Nm
• Operating Voltage: AC/DC 24 V (+/- 20%)
• Power Consumption: Max 10 W
• Running Time (90°): 5 to 120 seconds (dependent on burner control unit)
• Angular Adjustment: Max 90 degrees
• Protection Rating: IP54 (conforming to EN 60529)
• Operating Temperature: -20 C to +60 C
• Cable Length: 1.5 meters

Applications

• Load-dependent control of combustion air volume in medium to large capacity burners
• Precise positioning of gas dampers and oil volume control valves
• Integration with Siemens LMV27 and LMV37 electronic fuel-air ratio control systems
• Driving butterfly valves and other ancillary equipment requiring rotary motion in HVAC systems