Skip to main content


Social Innovation

Hitachi's Massive Pumps Support the World's Water Environment Hitachi's Massive Pumps Support the World's Water Environment

  • Water

Water is essential to support human life. Yet many countries and regions are suffering from shortages of water. To resolve this problem, large-scale projects to supply water to areas in need are in progress. As demand for water increases worldwide, the role of pumps, the heart of any water supply system, is becoming more and more important.

Hitachi Pump Technologies, Advancing Over More Than 100 Years

For more than 100 years, Hitachi has been advancing its manufacturing technology for pump

While some countries and regions have abundant water resources, other places often experience critical shortages. This affects people's daily lives and limits agricultural yields. To address the world's uneven distribution of water resources, demand for pumps that can move water over long distances has become stronger.

Hitachi has been developing a wide range of pumping and water treatment technologies for securing water resources, for drinking water and sewage treatment, and for recycling and reusing water. Hitachi's history in pump manufacturing dates back more than a century. There have been many highlights over the years. For example, Hitachi was commissioned by Tohoku Electric Power in 1950 to create one of Japan's largest lift pumping plants for the Numazawanuma Pumped Storage Power Station. In 1958, Hitachi received an order for variable-speed-drive impeller pumps to be used for an irrigation program in what was then East Pakistan (currently Bangladesh). This became the first step for Hitachi to enter overseas pump markets. Since then, Hitachi has continued to advance its technologies, delivering pumps for large-scale projects overseas and contributing to develop a better global water environment.

From Greening the Desert to Supplying Water to Cities Suffering from Water Shortage

Entering the 21st century, Hitachi accelerated its participation in overseas projects. In Egypt, Hitachi played an important role in the Toshka Project to green the desert and build a new city by bringing water from the Nile River. Hitachi constructed the Toshka Pumping Station, the key element for this water infrastructure project. Hitachi showed its technological leadership in the project, which was carried out by a multinational consortium. Hitachi's international contribution was greatly appreciated by Arab Republic of Egypt.

In China, Hitachi is participating in the South to North Water Transfer Project to take water from the south (Yangtze River basin) to supply large areas in the north (Tianjin River basin) to overcome serious water shortages. Hitachi has completed construction of the Bao Ying Pump Station for this project.

Toshka Pumping Station was built along the side of Lake Nasser

Hitachi's large-scale, Vertical Centrifugal Turbine Pump

Vertical Multi Stage Centrifugal Turbine Pumps achieved the world's highest level of pumping efficiency while contributing to reductions in CO2 emissions.

In 2004, Hitachi was commissioned to renovate the Edmonston Pumping Plant, one of the world's largest lift pumping plants. The pumping plant is the most important piece of pumping infrastructure in the 960km-long waterway connecting northern and Southern California. It is an indispensable facility for supplying water from northern California to urban areas, such as Los Angels and San Diego, and agricultural areas in Southern California. The Edmonston Pumping Plant pumps water from the California Aqueduct up to the Surge Tank in order to cross the Tehachapi Mountain Range. This involves pumping water up 1,926 feet (or about 600 meters). Another challenge was how to reduce power consumption for the massive pumps, which are powered by an 80,000 horsepower (60,000 kW) synchronous motor. Hitachi utilized its extensive expertise in all aspects of pump technology and succeeded in developing highly efficient massive turbine pumps. Hitachi received high marks from the State of California's Department of Water Resources.

Creating One of the Most Efficient Pumps in the World

The Edmonston Pumping Plant is the result of Hitachi's advanced pump technologies, integrating the strengths of the entire Hitachi Group from development and design to manufacturing. At the foundation of this work, highly advanced analysis technology called Computational Fluid Dynamics (CFD) was used to accurately simulate the flow of water in the pump. CFD uses computers to calculate water flow. This, coupled with the design optimization technology and knowhow accumulated by Hitachi, makes it possible to create pump configurations that ensure high reliability and excellent performance.

Utilizing the strength of these design technologies, Hitachi was able to succeed in design optimization to increase pumping efficiency and reliability. Hitachi also manufactured major parts such as impellers and guide vanes utilizing precision technology and the latest computer numerical control machining* to achieve pumping efficiency at the world's highest level. These improvements in pump efficiency had a significant effect on saving energy and helped to reduce CO2 emissions.

Computer numerical control machining: Method using programmed numerical information to precisely control movements in machining.

"CFD", highly advanced analysis technology, is used to create highly efficient pumps

Machining impellers using computer numerical control for precision

Hitachi Working on Solving Issues Surrounding Water Resources Worldwide

Until water resources are stabilized and secured, food crises might occur. Issues surrounding water resources are serious and urgent for countries around the world. With that in mind, Hitachi has been developing its global pump business by advancing massive projects in the U.S. and in countries and regions in the Middle East and Asia. Building on achievements from over 100 years of working on pump technologies for irrigation, drinking water, sewage and wastewater treatment, and power generation, Hitachi continues its efforts to resolve problems surrounding the world's water resources.