SQM48.497A9 Siemens Actuator

Overview

The Siemens SQM48.497A9 is a high-precision electromotoric actuator designed for the precise positioning of air dampers, gas dampers, and oil control valves in medium to large-capacity burners. As part of the Siemens SQM48 range, this robust actuator is engineered for use with linkageless burner controls, such as the Siemens LMV5 system, facilitating electronic fuel-to-air ratio control. It features a stepper motor and spur gear drive with permanent lubrication, providing high holding torque and reliable performance in industrial and commercial combustion applications.

Features

• High Torque Output: Delivers a rated torque and holding torque of 20 Nm to ensure stable control of burner components
• Stepper Motor Technology: Utilizes a stepper motor for precise angular positioning and high accuracy
• Robust Construction: Features a die-cast aluminum lower housing and a heat-resistant, impact-proof plastic cover rated for IP54 protection
• Linkageless Control: Specifically designed for integration with Siemens LMV5 burner management systems via a CAN bus interface
• Low Maintenance: Equipped with steel spur gears that are permanently lubricated for a long service life of approximately 250,000 start cycles
• Flexible Mounting: Supports optional mounting positions with a 14 mm keyed shaft for secure attachment to various dampening equipment

Specifications

• Model: SQM48.497A9
• Operating Voltage: AC 2 x 12 V (via bus cable or separate transformer)
• Power Consumption: 26 to 34 VA
• Running Time: 30 seconds for a 90 degree rotation
• Nominal Torque: 20 Nm
• Holding Torque: 20 Nm
• Angular Adjustment: Maximum 90 degrees
• Protection Rating: IP54 (with appropriate cable glands)
• Drive Shaft: 14 mm hardened steel with Woodruff key
• Weight: Approximately 1.6 kg (3.66 lbs)
• Operating Temperature: -20 C to +60 C

Applications

• Industrial Burners: Ideal for medium and large-capacity oil and gas burners used in steam boilers and central heating plants
• Damper Control: Used to drive air and gas dampers for precise combustion air management
• Fuel Control: Controls butterfly valves and oil pressure controllers for accurate fuel metering
• Thermal Process Plants: Suitable for integration into various thermal process systems requiring reliable rotary motion
• Modernization: Often used in linkageless burner upgrades to replace older mechanical linkage systems