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Danfoss: Smart Time Control Regulators and Fluid Control Solutions
In the late 1990s, the eastern district of Manila, the capital of the Philippines, faced severe water supply challenges. By 1997, the aging pipeline infrastructure led to significant leaks and an unreliable water supply, with many areas only receiving water for a few hours each day. The region, home to over 5 million people across five cities and three municipalities, needed urgent improvements. To address this, the local government partnered with private investors, leading to the formation of Manila Water Company in a public-private partnership. This collaboration resulted in a 25-year concession agreement to manage and operate the eastern waterworks.
To enhance efficiency and reduce water loss, Manila Water implemented advanced technologies, including Danfoss Smart Time Control Pressure Reducing Valves. These valves were specifically chosen for their ability to regulate pressure dynamically based on time of day. During nighttime, when demand is low, the valves reduce pressure to minimize leakage. In the daytime, when demand rises, pressure is increased to ensure sufficient supply for residents.
The Danfoss Smart Valve operates using a pilot control system that adjusts the main valve’s position to maintain a constant downstream pressure, regardless of upstream fluctuations. This system includes a pilot valve, filter, shut-off valve, and orifice plate, allowing precise control through adjustable settings. With the addition of a time controller or flow switch, the system can be programmed to adjust pressure at specific times, optimizing performance and reducing waste.
After installing seven Danfoss valves in December 2001, Manila Eastern Water Company saw immediate benefits. Daily water supply averaged 4,796 m³, with network pressure maintained at 2.27 bar. Water savings reached 625 m³ per day, translating to 228,000 m³ annually. At a residential water price of $0.33 per cubic meter, annual savings amounted to $75,240, resulting in a payback period of just 1.3 years. If all savings came from commercial users, the return would be even faster, at around 0.7 years.
Beyond cost savings, the project significantly improved service quality. Non-revenue water dropped from 63% to 43.4%, and 24-hour water access increased from 26% in 1997 to 89% by 2004. As a result, more than 500,000 residents now enjoy reliable water supply. Following the success in the east, 100 similar valves were installed in the western part of Manila in 2005.
Danfoss’s smart pressure control solutions not only reduced losses but also enhanced operational efficiency. Their valves provide scalable, reliable, and customizable options for water distribution systems worldwide. Whether you're managing a municipal network or a large industrial system, Danfoss offers tailored fluid control solutions to meet your unique needs. Contact us today to learn how we can help you achieve greater efficiency, sustainability, and long-term value.