Fire Door Closer Fusible Link

The ul listing number is for the fusible link arms is r1943. 4110fl add to cart add to compare lcn 4020 fusible link door closer 385 00. 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.

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4020fl add to cart add to compare lcn 4010 fusible link door closer.

Fire door closer fusible link.

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. This helps prevent the spread of flame but a fusible link will not help to slow the spread of smoke. Fusible links automatically close fire doors windows lids dampers vents and more in the event of a fire. Fusible links used in this manner are actually releasing devices that are heat actuated.

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. Lcn door closer fusible links. High temperatures melt the solder bond between links causing them to separate and release their load. 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.

Fusible link arms closer are not recommended to be used as a fire life safety device in occupied areas. The 4110 and the 4020 series can be templated for 100 140 or 180. It controls the rate of door descent. Fusible links automatically close fire doors windows lids dampers vents and more in the event of a fire.

Install with s hooks or chain not included. A fusible link is heat activated meaning it must be exposed to fire before it can melt and release the fire door to close. Lcn 4110 fusible link door closer 385 00. High temperatures melt the solder bond between links causing them to separate and release their load.

The fusible link is one of the simplest forms of heat detection devices. 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. When links are used in a restaurant system their purpose is to cause the system to function and extinguish the fire. Install with s hooks or chain not included.

At this point lcn is one of the only companies still making this type of door closer. If you have a building were you have a high traffic and abusive especially exterior doors then this is the closer. Fusible link door closers and arms. The 4010 series can be templated for 100 or 140.