Overview
The Siemens SQM56.664R1Z3R is a high-torque reversing actuator designed for the precise positioning of air and gas dampers, flow control valves, and butterfly valves in industrial and commercial burner applications. Part of the robust SQM5 series, this electromotive actuator is engineered for high modulating accuracy and repeatability. It features a clockwise rotation and is capable of providing significant force for large-scale combustion systems, ensuring stable and efficient process heating.
Features
- Reversing electromotive actuator with high torque capabilities
- Integrated 3/8 inch square, dual-ended drive shaft
- Clockwise (CW) rotation when facing the drive shaft
- Equipped with two limit switches and four internal auxiliary switches for flexible control
- Drive shaft and camshaft can be disengaged separately for easier adjustment
- Internal and external position indication for real-time monitoring
- Durable housing suitable for various mounting positions in industrial environments
- Multi-input electronic circuit board supporting a variety of control signals
Specifications
- Model: SQM56.664R1Z3R
- Operating Voltage: 110 V AC (50/60 Hz)
- Torque: 400 lb-in (45 Nm)
- Running Time: 50 seconds for 90 degrees (at 60 Hz)
- Rotation Direction: Clockwise (CW)
- Shaft Type: 3/8 inch square, dual-ended
- Control Inputs: 4-20 mA, 0-10 VDC, 0-135 Ohm
- Protection Class: Variants available with UL and CSA certification
- Operating Temperature: -4 F to +140 F (-20 C to +60 C)
Applications
- Precise positioning of air dampers in large industrial burners
- Control of gas flow valves and butterfly valves in combustion trains
- Use in HVAC systems requiring high torque for heavy-duty dampers
- Ideal for applications requiring high modulating accuracy and repeatability in process heating
- Compatible with Siemens burner management systems such as the LMV5 series



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