Protan head office and largest production facility are in Drammen, about 40 kilometres southwest of Oslo. At our fabrication plant in nesbyen we make welded and customised products tailored to our customer`s requiremets.
Material Properties
The materials used for Ventiflex are made to meet the requirements posed for the operation of modern tunnels and mines. The textile provides the requisite tensile strength to withstand the high internal pressure. Larger duct diameters require stronger textiles, and hence more and thicker threads. The specially developed knitted textile gives the material a high tear resistance and thus prevents small holes and cracks from growing and causing the entire duct to tear. The coating gives very good protection against most chemicals, water, sunlight (UV radiation) and gasses. Ticker coatings provide better wear resistance. All Ventiflex qualities are self-extinguishing (tested regularly by and independent institute), which is to say that in the event of a fire the duct will burn as long as it is exposed to flames, but it will go out when the source of the fire is removed, as opposed to most other organic materials which will continue to burn.
From production of Ventiflex in Nesbyen.