1. Governor control, that assures a closing speed from 6" to 24" per second, has a lifetime warranty.
2. Fusible link.
3. Oil tempered torsion springs designed for
50,000 life cycles.
4. Heavy duty cast iron gears.
5. Door can be easily tested and reset from one side of the door.
6. Structural angle guides (shown in photo)
and bottom bar.
7. Approved for all wall types (concrete, masonry, steel, steel with gypsum board).
8. Available in up to a 4 hour rating.
9. Release mechanism parts designed to provide years of testing without maintenance or repairs.
10. Door can be tested in fully closed position without damaging the mechanisms.
11. Pyroglass non-asbestos bulb astragal.
12. Optional cylinder locks.
13. Optional electromagnetic release device.
