The Siemens SQM50 series burner servomotors are high-torque electromechanical actuators used for controlling combustion air dampers and fuel valves in industrial oil and gas burners. These actuators regulate the flow of fuel and air according to burner load requirements, enabling efficient and stable combustion control.

The SQM50 series is typically used in medium- to large-capacity industrial burners and combustion systems, where powerful torque and precise positioning are required for air-fuel modulation.

These servomotors can operate with 3-position controllers or modulating control signals such as 4–20 mA, and they can also be integrated directly with burner management systems.

The actuator includes adjustable auxiliary switches, internal position indicators, and modular electronic components, allowing accurate configuration of burner positions such as ignition, low fire, and high fire.

With its heavy-duty mechanical design and high torque capability, the SQM50 is suitable for demanding industrial environments such as boilers, furnaces, and process heating plants.

Key Features

• Heavy-duty actuator for air dampers and fuel valves

• Designed for oil and gas industrial burners

• High torque performance for large combustion systems

• Compatible with 3-position and modulating control signals

• Adjustable auxiliary switches and cams

• Internal position indicator

• Optional potentiometer for position feedback

• Rugged industrial housing with reliable gearing

• Suitable for continuous duty operation

Applications

• Industrial gas burners

• Industrial oil burners

• Dual-fuel burner systems

• Steam boiler burners

• Thermal oil heaters

• Industrial furnaces and ovens

• Process heating plants

Why Choose Siemens SQM50 burner servomotor?

• Reliable Siemens combustion control technology

• High torque for large air dampers and valves

• Precise control of air-fuel ratio

• Compatible with burner management systems

• Durable design for long industrial service life

• Easy installation and maintenance

Technical Description

The Siemens SQM50 burner servomotor is an electronic actuator designed to drive air dampers and fuel valves in combustion systems. The device converts electrical control signals into precise rotary motion, allowing accurate positioning of burner components.

The actuator supports modulating signals such as 4–20 mA or relay-based control, enabling integration with PLC systems, combustion managers, or burner controllers.

SQM50 servomotors are equipped with adjustable auxiliary switches and optional feedback potentiometers, allowing monitoring and control of the actuator position during burner operation.

The heavy-duty design provides torque up to around 40 Nm, making the actuator suitable for large air dampers and industrial burner applications.

Technical Specifications