The selection of a burner actuator (air damper motor/servo motor) requires a comprehensive assessment of the burner's control method, torque requirements, operating environment, and brand compatibility to ensure precise control of the air-fuel ratio. The following are the key steps for selection:
1. Determine the Control Method (System Control Principle)
Proportional Control (Electronic/Mechanical Proportional Type): The actuator must receive continuous signals (e.g., 4–20 mA or 0–10 V) to perform stepless adjustment. This is typically paired with a proportional controller or a burner management system.
Multi-Stage Control (Two-Position/Three-Stage Type): The actuator only needs to drive the air damper to a few fixed angles (e.g., high fire, low fire, or ignition position).
Mechanical Cam Linkage: Some traditional burners utilize mechanical linkages (connecting rods) to couple the air damper and the gas valve; this imposes specific requirements regarding the precision and torque matching of the actuator.
2. Confirm Core Technical Parameters: Torque
Torque: The required torque must be determined based on the size of the air damper blade and the airflow resistance. Generally, the torque should be matched to the burner's power output, with a safety margin (redundancy) of at least 20% added to the calculated requirement (standard burners typically utilize actuators with a torque range of 1 Nm to 20 Nm).
Running Time: This refers to the time required for the actuator to rotate from 0° to 90°. High-power burners require actuators with rapid response capabilities to accommodate rapid changes in load; therefore, high-speed actuators may be selected. For general small-to-medium-sized equipment, standard-speed actuators are usually sufficient.
Voltage and Signal: Confirm the voltage output of the control system (commonly 220 V or 24 V) as well as the type of control signal utilized (e.g., discrete/switching signals, resistance feedback, analog signals, etc.).
3. Consider Operating Environment and Brand Compatibility
Temperature Resistance: The area surrounding a burner typically experiences elevated temperatures. If the ambient temperature exceeds 70°C, the actuator selected must be a high-temperature-resistant model, or external heat dissipation/insulation measures must be implemented. **Brand Compatibility:** To ensure the safety and stability of the overall system, it is generally recommended to prioritize selecting an actuator from the same brand as the burner controller. Major brands of burner actuators include:
Siemens: Such as the SQN series (SQN3, SQN7, SQN9) and SQM series, which are widely used in various small to medium-sized burners.
Honeywell: Such as the LKS series, known for its high control precision.
Testo, Belimo, and others.
4. Verify Installation and Mechanical Interfaces
Check the actuator's direction of rotation (clockwise or counter-clockwise), shaft dimensions (D-shaped shaft or round shaft), and whether a feedback potentiometer or auxiliary switch is required.
The selection of a burner actuator (air damper motor/servo motor) requires a comprehensive assessment of the burner's control method, torque requirements, operating environment, and brand compatibility to ensure precise control of the air-fuel ratio. The following are the key steps for selection:
1. Determine the Control Method (System Control Principle)
Proportional Control (Electronic/Mechanical Proportional Type): The actuator must receive continuous signals (e.g., 4–20 mA or 0–10 V) to perform stepless adjustment. This is typically paired with a proportional controller or a burner management system.
Multi-Stage Control (Two-Position/Three-Stage Type): The actuator only needs to drive the air damper to a few fixed angles (e.g., high fire, low fire, or ignition position).
Mechanical Cam Linkage: Some traditional burners utilize mechanical linkages (connecting rods) to couple the air damper and the gas valve; this imposes specific requirements regarding the precision and torque matching of the actuator.
2. Confirm Core Technical Parameters: Torque
Torque: The required torque must be determined based on the size of the air damper blade and the airflow resistance. Generally, the torque should be matched to the burner's power output, with a safety margin (redundancy) of at least 20% added to the calculated requirement (standard burners typically utilize actuators with a torque range of 1 Nm to 20 Nm).
Running Time: This refers to the time required for the actuator to rotate from 0° to 90°. High-power burners require actuators with rapid response capabilities to accommodate rapid changes in load; therefore, high-speed actuators may be selected. For general small-to-medium-sized equipment, standard-speed actuators are usually sufficient.
Voltage and Signal: Confirm the voltage output of the control system (commonly 220 V or 24 V) as well as the type of control signal utilized (e.g., discrete/switching signals, resistance feedback, analog signals, etc.).
3. Consider Operating Environment and Brand Compatibility
Temperature Resistance: The area surrounding a burner typically experiences elevated temperatures. If the ambient temperature exceeds 70°C, the actuator selected must be a high-temperature-resistant model, or external heat dissipation/insulation measures must be implemented. **Brand Compatibility:** To ensure the safety and stability of the overall system, it is generally recommended to prioritize selecting an actuator from the same brand as the burner controller. Major brands of burner actuators include:
Siemens: Such as the SQN series (SQN3, SQN7, SQN9) and SQM series, which are widely used in various small to medium-sized burners.
Honeywell: Such as the LKS series, known for its high control precision.
Testo, Belimo, and others.
4. Verify Installation and Mechanical Interfaces
Check the actuator's direction of rotation (clockwise or counter-clockwise), shaft dimensions (D-shaped shaft or round shaft), and whether a feedback potentiometer or auxiliary switch is required.