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May 27, 2026
Product code: BDS-B
Backdraught Shutter
Material: Galvanized steel body, aluminum blades, rubber sealing ring, stainless steel shaft and spring combination design.
The backdraught shutter is designed with a split flap closure and allows air flow to pass in only one direction.
TPE rubber sealing ring is embedded in the body for better air tightness and noise reduction.
It is recommended to install the shutter in horizontal ducts.
| Item code | ØR(mm) | ØN(mm) | L(mm) | L1(mm) |
| BDS-B 100 | 96 | 94 | 45 | 10 |
| BDS-B 125 | 121 | 118 | 51 | 15 |
| BDS-B 150 | 146 | 144 | 64 | 15 |
| BDS-B 160 | 156 | 153 | 67 | 17 |
| BDS-B 200 | 195 | 193 | 73 | 31.5 |
