SQM20.18501 Siemens Actuator

Overview

The Siemens SQM20.18501 is a reversible electromotoric actuator specifically designed for the precise positioning of air dampers and control valves in oil and gas burner systems. As part of the SQM2 series, it provides a high-torque solution for industrial and commercial heating applications. This model is engineered to operate in connection with controllers or switching devices equipped with changeover contacts, facilitating efficient combustion control by regulating airflow or fuel volume.

Features

• Reversible synchronous motor that is locking-proof, ensuring reliable performance in demanding environments
• Integrated gear train with self-lubricating sinter-bronze bearings for maintenance-free operation
• Adjustable cams for setting switching points, allowing for customized control of the burner cycle
• Impact-proof and heat-resistant plastic cover with a dark-grey finish for durability
• Internal scale for easy visualization of the cam stack position during setup and adjustment
• Die-cast aluminum gear train housing featuring multiple threaded holes for flexible cable gland installation

Specifications

• Model: SQM20.18501
• Operating Voltage: AC 110 V, 50/60 Hz
• Nominal Torque: 20 Nm
• Starting Torque: 20 Nm
• Holding Torque: 12 Nm
• Running Time: 29 seconds for 90 degrees (at 50 Hz); 42 seconds for 130 degrees (at 50 Hz)
• Direction of Rotation: Clockwise (when facing the drive shaft)
• Number of Auxiliary Switches: 5
• Drive Shaft Diameter: 12 mm
• Protection Rating: IP54 (with appropriate cable entry)

Applications

• Positioning of air dampers in industrial and commercial oil and gas burners
• Control of flow valves in heating and combustion systems
• Integration with Siemens burner controls such as the LMV or LME series
• Use in HVAC systems requiring high-torque rotary motion for volume control dampers