CR2 - Circular fire damper for large diameters

Circular fire damper available in the largest diameters (up to 630 mm) with a fire resistance up to 120 minutes.


  • Large dimensions


  • Suitable for built-in installation
  • Minimal distance allowed
  • Suitable for rigid wall, rigid floor and light wall (metal stud gypsum plasterboard wall, gypsum blocks)
  • Sealing with fire resistant stone wool boards allowed, also for asymmetric opening
  • Air tightness in accordance with EN 1751: class B (class C in option)
  • Tested according to EN 1366-2 up to 500 Pa
  • Operating mechanism outside the wall
  • Maintenance-free
  • For indoor use
  • Operating temperature: max. 50°C


  1. Casing in galvanised steel
  2. Damper blade
  3. Operating mechanism
  4. Sealing cold smoke
  5. Blade bumper
  6. Intumescent strip
  7. Fusible link
  8. Rubber sealing ring
  9. Product identification