The Model EA Fusible Link was specifically designed for curtain type fire dampers and Underwriters Laboratories listed fire doors. This Underwriters Laboratories approved product is constructed from terne plated steel. It's available in 4 temperatures and has a maximum load of 25 pounds.more about our Model EA Fusible Link
Specifically designed for standard fire dampers, this product uses our Model G Fusible Link as the thermal activator. The Model GS Fusible Link is listed by Underwriters Laboratories, Inc.more about our Model GS Fusible Link
Mechanical heat activated device with a high-strength symmetrical shape. This product is listed by Underwriters Laboratories, Inc.more about our Model G Fusible Link
We strongly advise adherence to NFPA 80 chapter 5: Fire Door Care and Maintenance. In view of the life safety nature of this product, we recommend release of the link by heat gun followed by replacement.
NFPA 80 CHAPTER 19 Testing of Fire/Smoke Dampers:
NFPA 80 chapter 19.4.4 states the test frequency of fire dampers shall be every 4 years. Due to the life safety nature of the fusible link portion of this damper we recommend replacement at this time and destruction of the replaced link.