Siemens Combustion SQM56.667R1G3 Actuator

The Siemens Combustion SQM56.667R1G3 Actuator is an ultra-high torque reversing actuator specifically engineered for high-precision control of air dampers, gas valves, and butterfly valves in industrial burner applications. Delivering a robust 400 lb-in torque (45 Nm), this heavy-duty unit ensures reliable rotary motion even under high-load conditions where precise positioning is non-negotiable. Operating on a 120V AC power supply, it utilizes a modulating 4-20mA control signal to provide a high level of accuracy, characterized by up to 250 repositions through 90 degrees of travel.

Designed for field flexibility, the SQM56.667R1G3 features an internal auto/manual selector switch and a manual forward/reverse toggle, allowing for direct manual control during commissioning or maintenance. The clockwise (CW) rotation (when facing the gear end) is factory-set, though the modular design accommodates diverse mounting orientations and mounting bracket kits to facilitate the straightforward replacement of legacy or competitive actuators. With internal auxiliary switches and a selectable electronic linearization function, technicians can optimize fuel-to-air ratios for maximum combustion efficiency and turndown performance.

• High-Torque Performance: Provides 400 lb-in of torque to handle large-scale dampers and butterfly valves without stalling.
• Precise Modulation: Accepts 4-20mA input signals with 0.3-degree drive shaft play for exacting industrial process control.
• Internal Manual Override: Features integrated clutches for shaft and cam drum disengagement, enabling quick manual alignment.
• Adjustable Auxiliary Switches: Includes internal switches for managing ignition positions, low-fire purge, and economy settings.
• Modular Adaptability: Compatible with various exchangeable circuit boards and shafts to suit specific site requirements.

What is the primary application for the SQM56.667R1G3?
This actuator is primarily designed for high-capacity oil and gas burners, controlling gas flow, oil volume, and combustion air volume in response to a modulating controller.

Can I manually operate the actuator if the control signal fails?
Yes, the unit includes an auto/manual toggle switch and a manual forward/reverse override switch for independent operation by a qualified technician.

Is this unit compatible with CCW (counterclockwise) rotation?
This specific model (SQM56.667R1G3) is factory-configured for clockwise rotation when facing the gear end. For CCW requirements, check the specific wiring and model variant specifications.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.