The sewers of Paris draw a huge underground labyrinth, collecting rainwater and sewage. IVEA all stainless steel electric cylinders are tested to regulate the "too full", protect the capital of floods and the Seine from pollution...

The Parisian network represents 2400 km (the distance between Paris and Istanbul!) and has 30,000 Access looks, 140 km of collectors and 1400 km of elementary sewers. To avoid flooding on the pavement or in buildings during heavy rainfall, many works and storm Weirs allow the overflow of water to be discharged directly into the Seine. A system of valves is intended to evacuate only the bare necessities, these discharges of untreated water proving polluting.

For the manoeuvre of these isolation valves, ivea proposed and co-elaborated with the Mairie de Paris an alternative solution to the current hydraulic system, complex and problematic: an endless network of hoses and countless fittings, prone to corrosion, breakage (thus oil pollution) and waste acretion...

Instead, IVEA provided two prototype Electric cylinders "all stainless steel" (effort 20 kN – stroke 700 mm, equipped with AUMA servomotor and AUMATIC control box) designed to work in an unhealthy, corrosive and toxic environment. Everything is remote controlled: the encoders built into the cylinders allow to know the position of the valve and to regulate the flow of water remotely.

These compact equipment, with embedded functions and measurements, could be installed throughout the network, to ensure optimized regulation of water discharges, to help prevent pollution risks and thus to protect the environment: a future technology in the French and foreign metropolises bordering a river...