geba shut-off device type WFK-M-LüAR DN 100 according to DIN EN 15650, without limit switch

Shut-off device type WFK-M-LüAR
according to Model Ventilation System Guideline M-LüAR Issue 2 of April 30, 2021, Sec. 7.1 ff based on the fire damper WFK, EN 15650:2010. Made of galvanized steel sheet with metallic quick release, corrosion- and solder-free trigger mechanism - VDS tested and intumescent material. Free cross-section with minimal pressure loss and round design. For use in ventilation systems of buildings in any air direction with and without heat recovery.
Tested according to EN 1366-2
Classification according to DIN EN 13501-3: 2010-02:
-Solid slab (wet) EI 120 (ho i - o)-S
-Solid slab (dry - soft board) EI 90 (ho i - o)-S
-Laminated timber/cross-laminated timber slab (wet) EI 90 (ho i - o)-S
-Timber beam ceiling (wet) EI 90 (ho i - o)-S
-Shaft wall (solid and in metal stud construction) EI 90 (ve i - o)-S
Declaration of Performance DoP/WFK/DE/2023/006
Certificate of constancy of performance 1322-CPR-086678/01
Damper leakage according to EN 1366-2
Flammable and non-flammable air ducts can be connected, also unilaterally with a cover grille. Hinge-less, corrosion-free metallic actuator by means of relaxation of two stainless steel double torsion springs. Inspection during commissioning after installation, before closing the shaft e.g. by camera inspection.

Maintenance:
Maintenance should be carried out every 5 years, e.g. by internal camera inspection. If dirty, the duct must be cleaned.
Functional testing via floor-by-floor inspection openings is unnecessary. The ventilation duct should have a sufficient number of inspection openings for camera inspection and cleaning.