The BSB FD-C 250 screw in fusible link 12.5mm diameter - 72 degrees C.
These links are compatible with all the FD-C Series single blade circular fire dampers.
Located on the outside of the fire damper next to the handle.
Replacement Action Air Fusible Link 72c
This link kit comes with a new bracket to connect to the old damper and a new linkage.
Instructions inside the package.
Replacment link for "Actionair Fire Shield" curtain fire damper.
Fire Damper Springs or Constant Force Springs are used on both sides of a curtain fire damper helping to shut and open to stop smoke or fire in the ductwork.
These are sold in pairs (as we recommend that both are changed at the same time).