Siemens Actuator Servomotor SQM45 / SQM48 Series are electromotoric actuators designed to drive and control air dampers, gas dampers, butterfly valves, and oil pressure controllers in medium- to large-capacity oil and gas burner systems. They are also suitable for industrial thermal process applications.
The actuators feature stepper motors and low-backlash gear trains, offering a positioning resolution of 0.1°, torque ratings from 3 to 35 Nm depending on the model, and a maximum rotation angle of 90°. They operate in conjunction with the Siemens LMV5 burner control system through CAN bus communication for position control and feedback, allowing the burner system to regulate fuel and combustion air according to burner load requirements.
Key Features of Siemens SQM45 / SQM48
Stepper motor technology for precise rotary positioning
Torque ratings from 3 to 35 Nm, depending on the model
Running times of 10–120 seconds for 90° rotation, depending on the model and configuration
Maximum rotation angle of 90° with 0.1° positioning resolution
CAN bus communication for position control and feedback with Siemens LMV5
Configurable rotation direction and limit positions through the basic control unit
Low-backlash gear train with permanent lubrication
IP54 protection rating when installed according to manufacturer specifications
Available Siemens SQM45 / SQM48 Models
SQM45.291B9 – Maximum output torque of 3 Nm, minimum 90° running time of 10 seconds, drive shaft type No. 1
SQM45.295B9 – Maximum output torque of 3 Nm, minimum 90° running time of 10 seconds, drive shaft type No. 5
SQM48.497B9 – Maximum output torque of 20 Nm, minimum 90° running time of 30 seconds, drive shaft type No. 7
SQM48.697B9 – Maximum output torque of 35 Nm, minimum 90° running time of 60 seconds, drive shaft type No. 7
Applications of Siemens SQM45 / SQM48
Siemens SQM45 / SQM48 actuators are suitable for controlling air dampers and fuel-regulating devices in oil and gas burners, industrial boiler systems, butterfly valve applications, and industrial thermal processes. When integrated with Siemens LMV5, they support electronic fuel/air ratio control for load-dependent combustion regulation.
Selection Considerations: Before selecting or replacing an actuator, verify the model number, required torque, running time, drive shaft configuration, and compatibility with the Siemens LMV5 control system. Addressing and bus termination settings must also be checked and configured according to the manufacturer's instructions.
Siemens Actuator Servomotor SQM45 / SQM48 Series are electromotoric actuators designed to drive and control the positions of air dampers, gas dampers, butterfly valves, and oil pressure controllers in medium- to large-capacity oil and gas burner systems. Equipped with stepper motors, the actuators provide torque ratings ranging from 3 to 35 Nm, depending on the model, with 90° running times ranging from 10 to 120 seconds based on the actuator type and system configuration. Position control and feedback are handled through CAN bus communication in conjunction with the Siemens LMV5 burner management system. The actuators support a maximum rotation angle of 90° and an IP54 protection rating when installed according to manufacturer requirements. They are suitable for electronic fuel/air ratio control in industrial boiler systems and thermal process applications.
