Apr 18, 2025 · How Does a Fire Damper Fusible Link Work? The fire damper fusible link is a heat-sensitive device that holds the damper blade open under normal conditions. However, when …

Fusible links installed within fire dampers melt during fire conditions, releasing spring-loaded or gravity-operated blades that seal off ductwork. This compartmentalization prevents smoke …

While automated systems or smoke alarms control some dampers, a fusible link fire damper is controlled by the fire itself. The fusible link is sensitive to high temperatures and remains open …

What is a Fusible Link? A fusible link is a bi-metal, heat activated device used to hold damper blades in the open position. These fusible are comprised of two materials: two pieces of brass …

In case of a fire, these dampers shut automatically to stop airflow. They have a fusible link that melts at 165° F, releasing a spring to close the blade. Dampers meet UL 555 fire safety …

Oct 10, 2025 · Choosing the right fusible link for fire dampers is essential for rapid, reliable shutoff of smoke and flames in case of a fire. This guide highlights five recognized options, covering …

May 20, 2018 · FITS: Daytons 2TFZ4, 2TFZ5, 2TFZ6, 2TFZ7, 2TFZ8, 2TFZ9 Dampers / Lloyd Industries CRD50-55, 4X, 6X, and all Boots / Ruskin FDR Fuse Assembly / Becket Lever …

This paper reviews the origin and development of fire dampers, explains the operating principles of fusible link designs, and discusses their practical limitations in contemporary HVAC systems.

Fusible Link 165 Degree is primarily used for fire dampers, and more popular with Dayton, but also with Lloyd Industries, and Ruskin dampers that are intended to close automatically to help …

Fire dampers are essential for preventing smoke and fire from spreading through ventilation systems. Fusible links hold damper blades open until they reach a certain temperature and …