For mounting between ducts
The damper is installed by sliding between two ducts
Capable of functioning in both horizontal and vertical positions
When mounted, damper prevents back draft when the fan stops; temperature usage up to +50ºC
Aluminum blades will open when blades are exposed to pressure and will shut again when pressure drops
Its mechanical spring is sealed with a rubber (neoprene) gasket, which helps opening and shutting of the aluminum blades
Case Quantities: BDA 4" = 100, BDA 5" = 64, BDA 6" = 36, BDA 8" = 16, BDA 10" = 12, BDA 12" = 9
| Model | ⌀ d | H | t |
| BDA 4" | 3-7/8" | 3-7/16" | 1/64" |
| BDA 5" | 4-7/8" | ||
| BDA 6" | 5-7/8" | ||
| BDA 8" | 7-13/16" | ||
| BDA 10" | 9-13/16" | 5-1/16" | |
| BDA 12" | 12-3/8" | 5-1/16" |