GN21000 GEORGIN
February 13, 2025
IGNITION TRANSFORMER EBI 052F4045 OILON
February 13, 2025
The SERVOMOTOR SQM41.267A21 OILON (Model: SQM41.267A21, BPZ:SQM41.267A21) is a high-torque electromechanical actuator manufactured by Siemens Building Technologies and supplied for Oilon industrial oil, gas, and dual-fuel burner systems.
Stock: available
SERVOMOTOR SQM41.267A21 OILON Electric Damper Actuator
The SERVOMOTOR SQM41.267A21 OILON (Model: SQM41.267A21, BPZ:SQM41.267A21) is a high-torque electromechanical actuator manufactured by Siemens Building Technologies and supplied for Oilon industrial oil, gas, and dual-fuel burner systems. Engineered for precise control of combustion air and fuel flow, the SERVOMOTOR SQM41.267A21 OILON drives heavy-duty air dampers, gas butterfly valves, and oil control valves on large boiler installations.
Operating on 220–240V AC power, the SERVOMOTOR SQM41.267A21 OILON features a reversible synchronous motor connected to a spur gear train with adjustable cam switches. Interfacing directly with electronic burner management systems or mechanical ratio controllers, it provides repeatable 90° positioning to maintain exact air-to-fuel ratios across pre-purge, partial load, and full load operations.
Key Features of the SERVOMOTOR SQM41.267A21 OILON
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High Running Torque: Delivers strong positioning force (10 Nm) to drive heavy mechanical linkages and large air dampers.
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Synchronous Reversible Drive: Maintains constant operating speed independent of load variations for high repeatability.
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Adjustable Cam Switches: Internal color-coded cams enable precise setting of end-stop limits and auxiliary switching positions.
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Die-Cast Aluminum Base: Rugged housing construction ensures thermal resistance and structural stability in harsh boiler room environments.
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Gear Disengagement Feature: Equipped with a manual gear release button to simplify setup and mechanical zero-point calibration during installation.
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Direct Siemens & Oilon Compatibility: Integrates seamlessly with Siemens LMV/LME control systems and Oilon industrial burner assemblies.
Primary Applications
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Industrial Oil & Gas Burners: Controlling air dampers and fuel valves on Oilon dual-fuel, light oil, and natural gas burners
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Heavy Utility & Steam Boilers: Air-fuel ratio control on commercial heating plants, thermal fluid heaters, and steam generators
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Marine Auxiliary Boilers: Heavy-duty electric damper modulation on shipboard auxiliary boilers and waste incinerators
Technical Specifications
| Parameter Category | Specification Details |
| Manufacturer / Brand | Siemens Building Technologies / Oilon |
| Part Number / Keyword | SERVOMOTOR SQM41.267A21 OILON (SQM41.267A21) |
| Device Type | Electric Damper Servomotor / Actuator |
| Operating Voltage | 220V to 240V AC (+10% / -15%), 50/60 Hz |
| Running Time (for 90°) | 30 seconds (at 50 Hz) / 25 seconds (at 60 Hz) |
| Holding & Running Torque | 10 Nm |
| Direction of Rotation | Counterclockwise (CCW) standard (reversible) |
| Angular Stroke / Position Range | 0° to 90° adjustable via internal cams |
| Number of Internal Cams | 8 internal limit / auxiliary switches |
| Enclosure Protection | IP54 rating |
| Operating Temperature | -20°C to +60°C (-4°F to 140°F) |
| Weight | Approx. 1.70 kg |
Package Contents
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1 × SERVOMOTOR SQM41.267A21 OILON Actuator Unit
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Cam Adjustment Key & Wiring Leaflet