SQM45.295B9 Siemens Actuator

Overview

The Siemens SQM45.295B9 is a high-precision electronic actuator designed for the accurate positioning of dampers and valves in industrial burner applications. As a key component of the Siemens LMV5 linkageless control system, it facilitates the load-dependent control of gas flow, oil volume, and combustion air. This model is engineered to replace the older SQM45.295A9 version and is specifically optimized for use with LMV5 systems to improve energy efficiency and emission control in medium to large-capacity thermal process plants.

Features

• High-torque performance with a nominal output torque of 3 Nm (27 in-lb)
• Precise positioning capabilities driven by a stepper motor for tight control of the fuel-air ratio
• Integrated CAN bus communication for seamless connection to LMV5 burner controls
• Robust die-cast aluminum housing designed for durability in demanding industrial environments
• Maintenance-free gear train and internal self-locking mechanisms for reliable long-term service
• Designed for a service life of approximately 250,000 start cycles or 10 years of operation
• Optional NEMA 4 protection available for specific environment requirements

Specifications

• Model: SQM45.295B9
• Operating Voltage: 24 V AC/DC (via CAN bus)
• Nominal Torque: 3 Nm (27 in-lb)
• Holding Torque: 1.5 Nm
• Running Time: 10 seconds for 90 degree rotation
• Rotation Direction: Counterclockwise (CCW)
• Shaft Type: No. 5 shaft (10 mm diameter with keyway)
• Operating Temperature Range: -20 C to +60 C (-4 F to +140 F)
• Protection Rating: IP54 (standard) or NEMA 4 with appropriate kits

Applications

• Load-dependent control of combustion air and fuel volume for oil and gas burners
• Positioning of butterfly valves and oil pressure controllers in heating systems
• Modulation of dampers in large-scale HVAC and boiler installations
• Use in thermal process plants requiring precise rotary motion for temperature and pressure regulation
• Integration with Siemens LMV5 linkageless control systems for industrial burner management