Siemens 331-4551 Fire Damper Actuator 5-10 lb 2.75 inch Stroke

The Siemens 331-4551 is a spring return electric actuator designed specifically for fire and smoke damper applications in commercial HVAC systems. This actuator delivers 5-10 pounds of torque and features a 2.75-inch stroke length, making it suitable for medium-sized damper installations where reliable fail-safe operation is critical.

Key Features:

• Spring return operation for automatic damper closure during power failure or fire alarm activation
• 5-10 lb torque output provides sufficient force for fire damper actuation
• 2.75-inch stroke length accommodates standard damper linkage configurations
• Designed for fire-rated damper applications in commercial building HVAC systems
• Compatible with Siemens building automation and fire safety control systems
• Durable construction for reliable performance in life safety applications

This actuator is engineered to meet the demanding requirements of fire and smoke damper systems, providing dependable fail-safe positioning to help maintain building compartmentalization during fire events. The spring return mechanism ensures the damper closes automatically when power is interrupted, making it an essential component in code-compliant fire protection systems.