Overview
The Siemens SQM50.461R1Z4 is a high-precision reversing rotary actuator designed for the accurate positioning of air dampers, flow control valves, and butterfly valves in oil and gas burners. Part of the industrial-grade SQM5 series, this electromotive actuator is engineered for applications requiring exceptional modulating accuracy and repeatability. Its robust design features a die-cast aluminum housing and impact-resistant plastic covers, making it suitable for demanding combustion environments.
Features
- Reversing motor allows for flexible control in both clockwise and counterclockwise directions
- Equipped with two limit switches and up to four adjustable internal auxiliary switches for precise positioning
- Integrated auto/manual selector switch and manual forward/reverse toggle for easy maintenance and field adjustments
- Modular design supports exchangeable circuit boards and potentiometers to accommodate various control signals
- Externally visible shaft position indicator provides immediate visual feedback
- Disengagement clutches for the drive shaft and camshaft allow for manual adjustments during commissioning
- UL recognized, CSA certified, and CE approved for international safety and performance standards
Specifications
- Model: SQM50.461R1Z4
- Operating Voltage: 110-120 VAC (50/60 Hz)
- Torque: 140 in-lbs (16 Nm)
- Running Time: 25 seconds for 90 degrees (at 60 Hz)
- Rotational Range: Adjustable up to 135 degrees
- Shaft Type: 10 mm round single-ended shaft
- Protection Rating: NEMA 1, 2, 3, 3R, 3S, 5, 12, and 13 (IP54 equivalent)
- Operating Temperature: -5 F to +140 F (-15 C to +60 C)
- Power Consumption: 20 VA
Applications
- Positioning of air and fuel dampers in industrial and commercial combustion systems
- Control of butterfly valves and flow control valves for air/gas ratio management
- High-demand burner cycles requiring precise modulating control
- HVAC and boiler systems using Siemens burner controls like the LMV5 series
- Suitable for any industrial application requiring reliable rotary motion and position feedback



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