The Grand Paris Express is fundamentally reshaping transport infrastructure across the Île-de-France region. On several of the lines currently under construction, Tsurumi France is playing an important supporting role — including on Metro Line 18, where tunnelling work is steadily advancing.
As the tunnel extends further away from the water treatment point, the challenge of transporting accumulating water increases significantly. Longer distances mean higher pressure losses in the drainage pipes — eventually exceeding the capacity of the pumps initially installed. To maintain continuous water flow to the treatment plant, the construction consortium needed an effective way to overcome these increasing hydraulic demands.
A Booster Solution for Long-Distance Pumping
The site management opted for a booster pump configuration, installing Tsurumi submersible pumps in series and outside the water — a non-standard setup that nevertheless works efficiently thanks to the robust design of Tsurumi pumps.
A key advantage: Tsurumi's original oil-lifter technology, which ensures consistent lubrication and cooling of the mechanical seal, even in demanding or unconventional operating conditions. This eliminates the risk of overheating and ensures reliable long-term performance.
KTZ 422: Power, Pressure and Reliability
To meet the pressure and distance requirements on Line 18, the consortium selected the Tsurumi KTZ 422. This 22 kW powerhouse is one of Tsurumi's most trusted models and is known for:
- excellent versatility across applications
- the ability to generate high discharge pressure
- outstanding durability in abrasive and demanding environments
- stable performance even in booster configurations
If you would like to learn more about the KTZ 422 or need support in choosing the right pump for your project, simply send us an email at sales@tsurumi.eu — our team is happy to help.
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