The round single-blade butterfly valve can be manufactured with flanged edges as required, sized in W×H to match duct dimensions.
Technical Parameters：
| Duct Size | Ф150 | Ф200 | Ф250 | Ф300 | Ф350 | Ф400 | Ф450 | ＞Ф450 |
| Valve Body Thickness (L) | 200 | 200 | 250 | 300 | 300 | 350 | 400 | 210 |