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CR120 up to 315mm Ø

Circular Fire Dampers

Circular Fire Damper CR120

Optimised circular fire damper with a fire resistance up to 120 minutes. A minimal pressure loss is guaranteed thanks to the thin blade, the fusible link aligned with the blade, and the transmission located outside the tunnel. The damper is available in small diameters (starting from 100 mm). Its galvanised steel tunnel contributes to the light weight of the damper.

Fire dampers are installed where air ducts penetrate fire-resistant compartment walls. Their role is to restore the fire resistance grade of the penetrated wall and to prevent smoke propagation. Fire dampers are distinguished by their degree of fire resistance, by their aeraulic properties as well as by their installation ease. Rf-Technologies’ fire dampers are all CE marked. They can be equipped with various types of mechanisms depending on the specific needs linked to the project or to the local regulations.

• Easy to install
• Optimal free air passage and minimal pressure loss
• Optimal acoustic performance
• Higher net building volume through compact size
• Air-tightness class C according to EN1751

Product Highlights

• Suitable for built-in installation

• Suitable for installation remote from the wall

• Minimal distance allowed

• Suitable for rigid wall, rigid floor and light wall (metal stud gypsum plasterboard wall)

• Sealing with fire resistant stone wool boards allowed, also for asymmetric opening

• 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. Rubber sealing ring
5. Intumescent strip
6. Base plate for thermo-electrical fuse
7. Positioning plate
8. Sealing ring for damper blade
9. Fusible link
10. Product identification