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Duct backdraught shutters
BDA
BDA
| Size | Φd(mm) | H(mm) | t(mm) |
| 80 | 97 | 88 | 0.5 |
| 100 | 99 | 88 | 0.5 |
| 125 | 124 | 88 | 0.5 |
| 150 | 148.9 | 88 | 0.5 |
| 160 | 158.9 | 88 | 0.5 |
| 200 | 198.9 | 88 | 0.5 |
| 250 | 248.9 | 128 | 0.5 |
| 315 | 313.8 | 128 | 0.5 |
| 355 | 353.8 | 97.5 | 0.5 |
| 400 | 398.8 | 97.5 | 0.5 |
| 450 | 448.8 | 122.5 | 0.5 |
| 500 | 498.8 | 122.5 | 0.5 |
| 560 | 558.8 | 122.5 | 0.5 |
| 630 | 628.8 | 122.5 | 0.5 |
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Galvanized steel circular backdraught shutters with aluminium blades for mounting in between 2 ducts
Application
For airflow control in ventilation systems
The aluminium blades will open when blades are exposed to overpressure and will shut again when pressure falls away thanks to a stainless steel mechanical spring
Temperature usage up to 50°C
Material
Galvanized steel and aluminium
Composition
Body made of galvanized steel
Blades made of aluminium
Galvanized natural finish
Mounting
It is recommended to install the shutter into horizontal ducting
Shutter spindle should be vertical
The shutter is installed into piping by simple slide-invvvvvvvvvvvvvvvvv
The backdraught shutters for round ducts shall be of the type
with galvanized steel body and aluminium blades. They will be
mounted in between two ducts to prevent backdraught when the
fan stops.
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