Dimensions
| Model | D1 (mm) | D2 (mm) | D3 (mm) | D4 (mm) | D5 (mm) | D6 (mm) | D7 (mm) | Bolt Hole Diameter Φ (mm) | Number of Bolts n |
|---|---|---|---|---|---|---|---|---|---|
| SR78-300 | 200 | 208 | 173 | 189 | 241.6 | 270 | 250 | 9 | 8 |
| SR76-500 | 200 | 208 | 173 | 189 | 241.6 | 270 | 250 | 9 | 8 |
| SR78-1000 | 300 | 308 | 273 | 289 | 341.6 | 385 | 360 | 11/9 | 9 |
WARTIME VENTILATION EQUIPMENT
Wall thickness unevenness shall not exceed 1 mm. No defects such as pores or cracks are allowed in visual inspection.
Tensile strength at break > 150 kg/cm; elongation at break: 500%.
Permanent deformation < 30%; Shore hardness: 45–55. Aging coefficient > 0.8 after 72 hours at 70℃.
Flexible flanges share the same bolt hole pattern as steel flanges; holes shall be drilled on site during installation.
| Model | D1 (mm) | D2 (mm) | D3 (mm) | D4 (mm) | D5 (mm) | D6 (mm) | D7 (mm) | Bolt Hole Diameter Φ (mm) | Number of Bolts n |
|---|---|---|---|---|---|---|---|---|---|
| SR78-300 | 200 | 208 | 173 | 189 | 241.6 | 270 | 250 | 9 | 8 |
| SR76-500 | 200 | 208 | 173 | 189 | 241.6 | 270 | 250 | 9 | 8 |
| SR78-1000 | 300 | 308 | 273 | 289 | 341.6 | 385 | 360 | 11/9 | 9 |
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