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Case Study - Hitachi in Brazil

Hitachi

Sabesp - Hitachi Case Study Solution

Hitachi’s Solution

Hitachi engineers began designing the new system for Sabesp in the 1960’s and completed the project in 1973. The system they developed, the Cantareira System, is actually comprised of 6 dams (Jaguari, Jacarei, Cachoeira, Atibainha, Juqueri and Águas Claras). The water is stored at different levels and utilizes gravity to flow into the Santa Ines Elevation Station. Once there, water could only flow uphill to the Águas Claras reservoir via a system of powerful, high flow pumps. Hitachi supplied Sabesp with three pumps, each of which was capable of pumping 11m3 of water per second over a distance of 120 meters at a speed of 720 rmp.

Cantareira System

  • To overcome the physical barrier the moutain range presented, the Santa Ines Elevation Station was built 60 meters below the surface and required blasting through solid rock.
  • High powered pumps were installed to force water uphill.
  • Extra strength valves were installed to protect the equipment by preventing a backflow of water in the event of a power outage.

The Cantarieira System is still functioning at peak performance levels. Every second, 33 thousand liters of water pass through the Hitachi pumps. Today, the Cantareira System supplies water to 8.8 million people in 39 cities in the São Paulo metropolitan area. 47% of the water supplied by Sabesp comes from this single system.

Carlos Roberto Dardis - Division Manager of Water Resources Metropolitan North Message from Carlos Roberto Dardis - Division Manager of Water Resources Metropolitan North