The positive press airducts adopt such technology and crafts: Conglutinate the cylinder by heat and then form in the final shape. There is no joint lengthways. It has such features: Fire-proof, anti-electrostatic, low resistance, low air leak, with high intensity and density. It is available in the mine and tunnel for air ventilation collaborating with fanner.

PVC-coated positive press airducts passed all the tests by the national safety production mine equipment testing center. Our products meet MT164-1995 national standards and are authorized to use safety symbol for mine-used products. We are one of the appointed airduct manufacturers by Coal Ministry and Ministry of Chemical Industry. The size of air ducts is from 200mm-1300mm (diameter)/ 10m (length) and we can process the order based on customer requirements.

Standard parameter of airduct:
Maximal pressure: ?? 5000pa
Expanding rate: ?? 3%
Air leakage rate per 100 meters: ?? 4%
Other performance: Fire-proof, anti-static, heat-resistant, cold-resistant, etc. All comply with the coal industry standards.
Specifications: Dia. 300mm, dia. 400mm, dia. 450mm, dia. 500mm, dia. 600mm, dia. 800mm, dia. 1000mm
Length: 5 meters, 10 meters, 20 meters, 50 meters or customized according to demand of customer.