Negative Ventilation Duct Hose
S ulong Negative Flow Ducting is also called Flexible Ducting, Spiral Ducting or Simi-rigid Duct. It is used for both positive and negative pressure application of underground tunnel and mining projects. It is produced based on positive flow ducting, it installs hard-drawn steel or spring steel as frame on the lay flat ducting to support it withstand high pressure. The diameter can be customized from 150 mm to 2,000 mm and length for every piece is 1 m to 20 m. MSHA approved!
Specifications
| PVC Fabric | SL-PFD-Ⅲ | SL-PFD-Ⅱ | SL-PFD-TⅢ | SL-PFD-TⅡ | SL-PFD-TⅠ | |
| Threads & Yarn | 500D×840D | 1000D×1000D | 1000D×1000D | 1500D×1500D | 2000D×2000D | |
| 9×12 | 9×12 | 12×12 | 9×12 | 9×9 | ||
| Total Weight | 420±20 | 500±20 | 550±20 | 600±20 | 700±20 | |
| Color | Yellow / Black / Green | |||||
| Tensile Strength (DIN53354) | Warp (N/5cm) | 1000 | 1200 | 1600 | 1800 | 2600 |
| Weft (N/5cm) | 1000 | 1500 | 1900 | 2000 | 2600 | |
| Tearing Strength (DIN53363) | Warp (N) | 220 | 320 | 500 | 650 | 720 |
| Weft (N) | 300 | 380 | 500 | 680 | 720 | |
| Working Temperature | -30℃ ~ +80℃ | |||||
| Flame Retardant | NFPA701:2015, DIN 4102 B2 | |||||
| Inside Diameter | 150 mm - 2,000 mm | |||||
| Length | 1 m - 20 m | |||||
| Standard Pitch | 75 mm for exhausting, 150 mm for blowing | |||||
| Wire | Hard-Drawn steel / Spring Steel | |||||
| End Finish | Zipper / Steel Ring / Velcro | |||||
| Conductivity | ≤108 Ω (both for Black and Yellow) | |||||
| * We hereby state that the above data is only for reference, allowing 5% tolerance. | ||||||
- Working temperature: -30℃ ~ 80 ℃.
- Diameter: 150 mm ~ 2,000 mm
- Standard Length: 1 m ~ 20 m
- Standard color: Yellow, Black, Green
- Connection: Zipper and Steel Ring
S ulong Negative Flow Ducting is also called Flexible Ducting, Spiral Ducting or Simi rigid ducting. It is used for both positive and negative pressure application of underground tunnel and mining projects. It is produced based on positive flow ducting, it installs hard-drawn steel or spring steel as frame on the lay flat ducting to support it withstand high pressure. Sewn construction and wear strip allow for continuous use in harsh environment.
The diameter can be customized from 150 mm to 2,000 mm and length for every piece is 1 m to 20 m.
Five different standard types of PVC coated fabric to meet different models of ventilation fans and the fabrics can be flame retardant and anti-static. Also other fabric specification can be customized according to clients' requirement.
Quality standard abides by GB/T 9900-2008, NFPA 701, MA and SGS.
Usage：Underground project of coal mines, tunnels, subway, ships and so on.
- Large air flow
- Long distance air supply
- Low air leakage
- Low air resistance
- Long service life
- Easy installation
- Safe and Environmental protection
- Great value
- Long distance air supply
