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Typical Applications: Application of Danfoss Smart Time Control Pressure Reducing Valve in the Water Supply Network Renovation in the Eastern District of Manila (Capital of the Philippines) and Analysis of Revenues for Manila Water Company. Project Background The municipal water supply to the eastern part of Manila was extremely poor by 1997. Due to pipeline aging, severe water leaks and inadequate water supply, 24-hour water supply was not available in most areas of the city while the eastern part of Manila was developing rapidly with a population of over 5 million It consists of five cities, three municipalities and parts of Manila. In order to meet the urgent need to improve water services, Manila officials decided to introduce private capital. In 1997, the Manila Water Company and the state-owned municipal water supply and drainage company in Manila's eastern district established a public-private joint venture and signed a 25-year concession contract And contractors to operate and manage Manila Eastern Waterworks Role and Working Principle of Intelligent Control Valves in Pipe Network Systems To reduce water loss and to supply water according to actual demand, Manila Water Company has taken a series of measures, one of which is selection A pressure reducing valve with a time control function that is intended to reduce the water supply pressure during the night (when the water is low), thereby reducing the leakage loss and increasing the water supply pressure of the pipe network during daytime (peak) to meet the needs of residents Water needs. To meet this technical requirement, Manila Water finally chose Danfoss Smart Time Control Pressure Relief Valve, a Danfoss pressure reducing valve that always reduces downstream pressure regardless of pressure changes upstream of the valve and is maintained at a preset Constant value. Its working principle is as follows: the pilot control system acts on the main valve diaphragm, resulting in the main valve opening and closing to achieve the downstream pressure control.The pilot control system consists of a pilot valve, a filter, a shut-off valve and a shut-off orifice plate. Pilot valve control system with adjustable spring current limit control. Spring setting Increases or decreases the pressure by adjusting the adjustable screw on the pilot valve. Danfoss pressure regulators also allow you to adjust the water pressure for a specific time of day in a day by using an accessory such as an automatic time controller / flow switch or adjust the pressure according to other parameters. Valve open and close in normal working state depends on the customer pre-set parameters on the controller. Economic Benefit and Added Value of Danfoss Smart Pressure Reducing Valve to Customers The following is some data (only 7 installed) after Manila Eastern Water Company used intelligent control valve in December 2001 to show this product to Manila East Return on water company. Average Daily Water Supply: 4,796m3 Average Pressure of Pipe Network: 2.27bar Average Pressure of Pipe Network: 2.26bar Normal Time Setting: 11pm --- 5am (Reducing Water Pressure and Reducing Leakage Loss in Evening Trough) 5am --- 11pm (Increasing water pressure during peak daytime to meet residents' needs) Average daily water saving: 625m3 Manila Water Company Input-output: total investment of 7 PRVs: 100,000USD Water supply production cost: 0.012USD / 1m3 Water price for residents: 0.33USD / 1m3 Commercial Water Price: 0.62USD / 1m3 Total Annual Water Savings: 625 * 365 = 228,000m3 Annual Savings if Residential Water Savings: 228 * 0.33 * 1000 = 75,240USD Recovery Costs: 100,000 /(228,000*0.33*1000)=1.3year If all the savings are commercial water, the annual income will be: 228 * 0.62 * 1000 = 141,360USD Recovery cost: 100,000 / (228,000 * 0.62 * 1000) = 0.7 Manila Eastern Water Company can recover the investment cost of intelligent control valve in about one year and enjoy the long-term benefits from it. Danfoss' Smart Control Valve adds more added value to Manila Water Company: Eastern Manila's water loss / non-revenue share dropped from 63% to 43.4%; water supply increased by 2 million and supply now stands at close to 500 The number of residents who can enjoy water supply 24 hours a day increased from 26% in 1997 to 89% at the end of 2004. Due to the successful renovation of Manila's eastern water network, about 100 intelligent control valves were also installed in 2005 in Manila West Franchise. With its expertise in the field of expertise and experience, Danfoss valves and fluid controls offer a wide range of valves and associated system solutions for different needs. Please contact us, we will provide you with value-added system solutions according to your needs.