SQM45.295A9 Siemens Actuator

Overview

The Siemens SQM45.295A9 is a high-precision rotary actuator designed for the accurate positioning of air and gas dampers, oil control valves, and other ancillary equipment in industrial burners. Engineered for use with the Siemens LMV5 linkageless burner management system, this actuator ensures optimal fuel-to-air ratios for efficient combustion. It features a robust design with a plastic spur gear drive and permanent lubrication, providing a maintenance-free service life of approximately 10 years or 250,000 start cycles. Note that this model was discontinued in 2017 and is directly replaced by the SQM45.295B9.

Features

• High-precision positioning via CAN bus communication with the LMV5 controller
• Robust spur gear drive with permanent lubrication for durability
• Compact design suitable for various burner mounting configurations
• Adjustable running times for maximum application flexibility
• Internal addressing button located under the housing cover for system integration
• Protection rating of IP54 when installed correctly to guard against dust and water

Specifications

• Model: SQM45.295A9
• Rated Torque: 27 in-lb (3 Nm)
• Holding Torque: 13 in-lb (1.5 Nm)
• Running Time: 10 to 120 seconds per 90 degree rotation
• Shaft Type: 10 mm D-shaped flat shaft
• Power Supply: 2 x 12 V DC (via CAN bus)
• Communication: CAN bus protocol
• Rotation Angle: Max 90 degrees
• Weight: Approximately 2.2 lbs (1 kg)

Applications

• Load-dependent control of gas flow and combustion air volume in medium to large capacity burners
• Positioning of air dampers and gas valves in industrial thermal process plants
• Integrated operation within the Siemens LMV5 linkageless control system
• Driving oil pressure controllers and butterfly valves in HVAC and boiler systems