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Inflatable rubber dams are cylindrical rubber fabrics placed across channels, streams and act as a weir or dam to raise the upstream water level when inflated. The membrane is a multi-layer fabric made of synthetic fibre (usually nylon) and rubberised on one or both sides. The fabric is flexible and yet exhibits good wear-resistance characteristics. A layer of stainless steel mesh or ceramic chips can be embedded in the surface layer to reduce or prevent vandal damage.
Specification
Material structure: one cloth two rubber, two clothes three rubber, three clothes four rubber, etc.
Color: blue, black, red, gray, purple, etc.
Medium in dam: water.
According to installation method:
Single anchor.
Double anchor (pillow-like dam and inclined dam).
According to anchored method:
Bolt anchored.
Wedge anchored.
Customization can be available.
| Item | Unit | Outer layer | Middle layer, inner layer | Cover rubber sheet | |
|---|---|---|---|---|---|
| Tensile strength at break | MPa | 14 | 12 | 6 | |
| Elongation at break | % | 400 | 400 | 250 | |
| Permanent deformation at break | % | 30 | 30 | 35 | |
| Hardness (shore A) | 55-65 | 50-60 | 55-65 | ||
| Brittleness temperature | °C | -30 | -30 | -30 | |
| Hot water aging (100 °C × 96 h) | Tensile strength at break | MPa | 12 | 10 | 5 |
| Elongation at break | % | 300 | 300 | 200 | |
| Hot water aging (70 °C × 96 h) | Tensile strength at break | MPa | 12 | 10 | 5 |
| Elongation at break | % | 300 | 300 | 200 | |
| Volume expansion ratio | % | 15 | 15 | 15 | |
| Ozone aging: 10000 pphm, temperature 40 °C, stretching 20%, no cracking | min | 120 | 120 | 100 | |
| Wear loss (akron) | cm3/1.61 km | 1.0 | 1.0 | 1.2 | |
| Flexibility, no cracking | Ten thousand times | 20 | 20 | 20 | |
| Code | Height (m) | Inner pressure / outer pressure | Security coefficient (k) | Bottom gaskets width (m) | Dam bag perimeter (m) |
|---|---|---|---|---|---|
| WIRDS-1 | 1.0 | 1.6 | > 8 | 1.8 | 3.70 |
| WIRDS-2 | 1.5 | 1.55 | > 8 | 2.05 | 5.40 |
| WIRDS-3 | 2.0 | 1.52 | > 8 | 3.40 | 7.10 |
| WIRDS-4 | 2.5 | 1.46 | > 8 | 4.36 | 8.80 |
| WIRDS-5 | 3.0 | 1.4 | > 8 | 5.45 | 10.70 |
| WIRDS-6 | 3.5 | 1.35 | > 8 | 6.8 | 12.70 |
| WIRDS-7 | 4.0 | 1.32 | > 8 | 7.96 | 14.65 |
| WIRDS-8 | 4.5 | 1.3 | > 8 | 9.15 | 16.50 |
| WIRDS-9 | 5.0 | 1.25 | > 8 | 11.1 | 19.08 |
| WIRDS-10 | 5.5 | 1.25 | > 8 | 12.13 | 20.90 |
| WIRDS-11 | 6.0 | 1.25 | > 8 | 13.27 | 22.80 |
Hebei Heng Yang Equipment Manufacturing Co., Ltd
