The EuroFlo Industrial Pump system retains Tunnel boring machine (TBM) cool by a continuous water provide. Special is an east-west rail route that passes under the city of London using new twin-bore 21km tunnels.
EuroFlo pumps and the tanks are located at the surface; the water is pumped from there down to the shaft and all alongside the tunnel up to the TBM. Once the water has passed through the TBM system the remaining water comes again via a filtration system to the tanks on the surface, out of the tunnel.
The water circuit provides 20 l/s to every TBM and eight l/s is used within the TBM for various works and 12 l/s returns to the tanks. The inlet stress wanted ranges between 4 and 10 bar. On one site three TBM’s are working and the pump system delivers 60 l/s, with the tools consisting of 1 single tank (3200m3) and one industrial pump used per tunnel. On another web site, the installation support’s the excavation with just one TBM with 20 litres/second and the water storage tank capacity of 1100m3
EuroFlo use 37 kW vertical multistage Industrial pumps for the cooling system whereas the TBM excavates through a major underground section of the Cross rail venture.
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