The EuroFlo Industrial Pump system retains Tunnel boring machine (TBM) cool by a continuous water provide. เกจวัดแรงดันลม10bar is an east-west rail route that passes under town of London using new twin-bore 21km tunnels.
EuroFlo pumps and the tanks are located on the surface; the water is pumped from there right down to the shaft and all along the tunnel as a lot as 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 floor, out of the tunnel.
The water circuit supplies 20 l/s to every TBM and eight l/s is used in the TBM for various works and 12 l/s returns to the tanks. The inlet strain wanted ranges between 4 and 10 bar. On one site three TBM’s are operating and the pump system delivers 60 l/s, with the equipment consisting of one single tank (3200m3) and one industrial pump used per tunnel. On one other web site, the installation support’s the excavation with only 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 by way of a major underground section of the Cross rail challenge.