blaubergventilatoren.de
KDL
Backdraft dampers
Use
For automatic shutoff of air ducts when the fan is off.
Backdraft prevention when mechanical ventilation is off.
Compatible with Tower-H, Tower-V, Tower-H EC, Tower-V EC roof fans.
Design
The casing and the rotary blade are made of galvanized steel.
Gravity actuated damper (the damper rotary blade is opened by air pressure and reset automatically when the fan is off and no air pressure is produced).
The damper is equipped with the flanges for connection to the roof fan, the VDL flexible connector or the FDL counterflange.
Overall dimensions
[mm]
Type
KDL 220-225
KDL 250-315
KDL 355-500
KDL 560
KDL 710
Standard size of compatible fans
190, 220, 225
250, 280, 310
355, 400, 450, 500
560, 630
710
∅ D
183
256
402
565
635
∅ D1
213
285
438
605
674
∅ D2
235
306
464
638
708
∅ d
7
7
9
10
10
H
115
156
220
300
380
Weight [kg]
1.0
1.7
3.5
7.3
14.1
INDUSTRIAL VENTILATION | 2021 287
