Hose types that are electrically conductive or capable of electrostatic discharge are used whenever there is a tendency for explosive atmospheres to form. NORRES Schlauchtechnik, Gelsenkirchen, Germany has now come up with two novel polyurethane tubes that are not only capable of electrostatic discharge but also feature an electrically conductive inliner for optimal discharge of static electricity: AIRDUC® PUR 351 ExTra and AIRDUC® PUR 355 ExTra. What's more, the transparent wall of these electrically conductive inliner industrial hoses allows the process to be observed at any time.

When solids or liquids are transported, the hoses are often charged with static. Electrostatic charging occurs due to the friction of the material against the hose wall and within the medium. Transport hoses are subjected to high dynamic stresses during the course of the process and therefore need to be particularly reliable. Hoses that are electrically conductive or capable of electrostatic discharge eliminate the risk of ignition from static but also have certain disadvantages: hoses capable of electrostatic discharge are less effective than conductive hoses at discharging static electricity, while conductive hoses have a completely black wall that prevents the pumping process from being observed.

The newest inventions to emerge from the NORRES stable – AIRDUC® PUR 351 ExTra and AIRDUC® PUR 355 ExTra – are the only polyurethane hoses in the market to feature an inliner for optimal discharge of static electricity while at the same time allowing the pumping process to be observed...