CU2L - Wide-ranging rectangular fire damper up to 120’

Damper with a tunnel casing extension at one or both sides so that the damper blade does not exceed the tunnel. This version allows to connect a grill or a bend directly on the damper flange or to use a circular connection.


  • Large dimensions
  • Many options and variants
  • Battery assembly tested in rigid wall
  • Model available for use in potentially explosive atmospheres


  • Extension: a = Hn/2-230 mm (on the side of the mechanism); b = Hn/2-100 mm (on the wall side)


  1. Connection flange PG30
  2. Casing made of refractory material
  3. Damper blade
  4. Operating mechanism
  5. Sealing cold smoke
  6. Blade bumper
  7. Intumescent strip
  8. Transmission with locking (open/closed)
  9. Fusible link
  10. Product identification
  11. Graphite strip
  12. Wall limit