Sell flexible ventilation tube ( semirigid duct)

Description

The spiral ducting can be used in both positive pressure application and negative pressure application, where it is necessary to convey fresh air and  exhaust air, toxic gases, dusts and other industrial pollutants out.
 
Our spiral ducting are made of the PVC-coated fabric with spring steel wire helix reinforced. They are extremely flexible (can be compressed) and have good suction effect. The pitch can be **0mm, **0mm, **0mm and the diameter of wire can be from 5mm to *0mm. The diameter of our spiral ducting can be from *0 inches to *0 inches. Our standard section length is 5m. The coupling type can be steel ring, zipper or Velcro. We can also customize to make special specifications as our customers request.
 
Features:
1) high tenacity ployester base fabric/ scrim with PVC coated on both sides
2) long-time and stable anti-static. In the usual use environment, the surface resistivity does not change as temperature and humidity varies and time goes by
3) flame retardant ( can meet NFPA***1, B1, B2 or M2 standard)
4) superior broken tensile strength and tear strength.
5) extremely low air leakage rate in a hundred meter
6) extremely low drag coefficient in a hundred meter
7) endure the temperature variation
8) more fold-resistant and extremely flexible
9) easier in repairing
*0) pro-environmental, do not have any unpleasant odor.