The Type WBE shut-off dampers provide fire resistance to class K90-18017.
The WBE can be mounted in walls and ceilings.
No special fixing methods are required (This is time saving and very economic).
The shut-off dampers may be used in ventilation systems in accordance with DIN 18017-3 for supply and return air. They can be mounted inside and outside of F90/F30 shaft partitions or L90/L30 classified system-tested ducts and with, or without, mortar (wet or dry installation).
These shut-off dampers may be used in domestic kitchens.
Fume extraction hoods (hoods without their own fan), which are components of central ventilation systems in accordance with DIN 18017-3, may be fitted with these shut-off dampers.