Fire Door Closer Fusible Link

Install with s hooks or chain not included.

Fire door closer fusible link. All of our fire doors are equipped with a speed governor or a viscous wheel governor which will help the door drop at a descent speed and not let the door crash down. Fusible link door closers and arms. 4020fl add to cart add to compare lcn 4010 fusible link door closer. The fusible link is one of the simplest forms of heat detection devices.

A fusible link is heat activated meaning it must be exposed to fire before it can melt and release the fire door to close. If you have a building were you have a high traffic and abusive especially exterior doors then this is the closer. Install with s hooks or chain not included. Fusible link arms closer are not recommended to be used as a fire life safety device in occupied areas.

Fusible links automatically close fire doors windows lids dampers vents and more in the event of a fire. In the days before hold open devices on fire doors and smoke doors were actuated by smoke detectors fusible link closer arms were often used to hold open doors that were required to close if a fire occurred. The 4010 series can be templated for 100 or 140. High temperatures melt the solder bond between links causing them to separate and release their load.

The ul listing number is for the fusible link arms is r1943. The fusible link will separate at 165 degrees and will release the tension of the door to automatically close in a case of a fire. The fusible link is a lead clip that melts at roughly 115 degrees and releases the door so it can close and contain a fire. Fusible links automatically close fire doors windows lids dampers vents and more in the event of a fire.

High temperatures melt the solder bond between links causing them to separate and release their load. The fusible link door closers were used from the 1940 s to now but have seen their usage declining due to the modern fire alarm systems that are wired into door closers. Fusible links used in this manner are actually releasing devices that are heat actuated. The 4110 and the 4020 series can be templated for 100 140 or 180.

4110fl add to cart add to compare lcn 4020 fusible link door closer 385 00. Lcn door closer fusible links. At this point lcn is one of the only companies still making this type of door closer. It controls the rate of door descent.