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Spiral reinforced duct

[Source:www.tdvent.com] [Spiral reinforced duct]

      The spiral reinforced duct is manufactured of PVC-coated woven fabric with spring steel wire helix. Adopting advanced hot air welding technologies made them more flexible.They can be used as elbows with positive and negative applications. These characteristics make spiral ventilation duct ideal for air ventilation and dust removal in mining, tunnel operation, underground constructions and confined space.The coupling system can be steel ringúČzipper or snap clasp. The diameter of duct and distance between the spiral wire helix determine the negative pressure.our duct is offered in range of pitch options from 150mm to 500mm.the diameter of wire can be from 5mm to 10mm.other special specifications can be customized upon customí»s request.
Features:

1. High strength polyester base cloth with virgin PVC coated on both sides.

2. long time and stable anti-static

3.flame retardent

4.superior broken tensile strength and tear strength.

5.extremely low air leakage rate of a hundred meter.

6.endure the temperature variation(-30íŠ--70íŠ).

7.more fold-resistant.

8.low surface resistivity.

9.environment friendly.

Cautions of using:

      1.The duct with different size should be selected according to the specific circumstances underground.

      2.The duct should be hoisted to straight,and should make every ring forced uniformly to avoid the weight concentrated in part rings.

      3.The duct should be regularly checked ,timely repair of damaged can prolong its use life.

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