Product Overview

The Siemens SQN7 series burner servomotors are compact electromechanical actuators designed for driving air dampers and fuel control valves in industrial oil and gas burners. These actuators help regulate the combustion air and fuel flow based on burner load conditions, ensuring efficient and stable burner operation.

SQN7 actuators are commonly used in small to medium-capacity burner systems and can operate with different burner control units such as LFL, LME, LMO, and LOA series controllers.

The actuator contains a reversible synchronous motor and gear train that rotates the damper shaft to the required position. Adjustable cams and auxiliary switches allow precise configuration of positions such as ignition load, low fire, and high fire during burner operation.

The drive shaft can also be manually disengaged to allow manual adjustment of the air damper linkage during installation or maintenance.

With its compact design, durable housing, and reliable synchronous motor, the SQN7 series provides stable performance in demanding industrial combustion environments.

Key Features

Reversible electromotoric actuator for burner control

Designed for industrial oil and gas burner systems

Controls air dampers and fuel valves

Adjustable cam switches for load positions

Manual gear disengagement for easy commissioning

Maintenance-free gear train

Compact and durable industrial housing

Supports two-stage and modulating burner control

Compatible with Siemens burner management systems

Applications

• Industrial gas burners

• Industrial oil burners

• Dual-fuel burner systems

• Steam boiler burners

• Thermal oil heaters

• Industrial furnaces and ovens

• Process heating systems

Why Choose Siemens SQN7 burner servomotor?

Reliable Siemens combustion control technology

Accurate positioning of burner air dampers

Compatible with many Siemens burner controllers

Durable design for continuous industrial operation

Easy installation and maintenance

Supports multiple burner control configurations

Technical Description

The Siemens SQN7 burner servomotor uses a reversible synchronous motor with a gear transmission system to control the position of air dampers or valves in burner systems. The actuator rotates the shaft to regulate the combustion air supply according to the burner load requirement.

The actuator includes adjustable cam switches that trigger electrical signals at specific positions. These switches allow burner control systems to manage functions such as ignition, minimum load, and maximum load positions.

Different versions of the SQN7 series are available for two-stage, modulating, or three-position control, enabling integration with modern combustion control systems.

The actuator also includes a manual disengagement mechanism, allowing technicians to manually rotate the shaft during setup or maintenance without powering the motor.

Technical Specifications