REAL LIFE SINGER SOLUTIONS

SINGER'S SPECIALTY PRV REGULATES BANGKOK PRESSURE

Their Challenge

With water loss up to 30 per cent, Metropolitan Water Authority (MWA) in Bangkok, Thailand, installed pressure reducing valves throughout the city and its suburbs. The valves controlled nighttime pressures accurately, preventing leaks and breaks. However, in some areas, high demand during the day caused the pressure to drop to 10 psi (0.68 bar) or less. Without sufficient pressure differential, regular pressure reducing valves would close, cutting off supply to consumers.

Our Solution

Because typical PRVs cannot open when the pressure drops below 10 psi (0.68 bar), Singer Valve’s instrumentation specialist Eugene Bahia fitted a 12” (300mm) valve with a standard Singer PR pilot and a Singer high-accuracy three-way pilot. By installing the custom combo into Singer’s flow lab, Bahia simulated various pressure and flow conditions. The results were rewarding.  “Because of the large diaphragm and sensing area of the three-way pilot,” says Bahia, “the valve required only seconds to open. And it remained fully open during the day’s high flow demands even with pressure as low as 2 psi (0.14 bar).”

The Result

When the custom unit was installed and tested in Bangkok, the results remained consistent. Pressure was reduced during high pressure periods at night. During low pressure / high flow periods in the day, the valve opened fully, ensuring a constant water supply to consumers. As a result, the water authority has installed numerous 12” (300mm) valves. “Our water loss was about 30 per cent,” says Mr. Ulit, MWA’s director of water loss management. “With Singer Valve, it’s now below 30 per cent.”

"OUR WATER LOSS WAS ABOUT 30 PERCENT. WITH SINGER VALVE, IT'S BELOW 30 PERCENT"

- Mr. Ulit. Director, Water Loss Management, Metropolitan Water Authority, Bangkok, Thailand

SINGER PFC VALVE SAVES BRAZIL WATER

Their Challenge

Sergio Mendonça was troubled. How could he reduce the municipality’s water losses by controlling the pressure and flow of its major pipelines? One source of São Bernardo do Campo’s water supply is 120 metres above four residential suburbs. During the day, the water pressure was sufficient due to the high demand. At night, with reduced customer demand, the pressure would increase substantially. And, because the main supply lines were manually closed, they would often leak or break.

Our Solution

After hearing about São Bernardo’s problem, Alejandro Duque, Singer’s territory manager, introduced Mendonça to Singer’s Pressure/Flow Control Valve. Comparing Singer’s product and another brand, Mendonça looked at each valve’s specifications, price, availability, ease of installation and performance. The winner? Singer’s PFC Valve.

The Result

When São Bernardo installed five Singer PFC valves, Mendonça documented the results and the savings. After two months, studies showed that water loss had been reduced by 15 per cent; the economic savings were just as great. And the results continued even after one year.  “The PFC pilot is a simple, reliable device that you can easily maintain,” says Brian Blann, president of Singer Valve Inc. “Although it’s used to solve water loss applications, the PFC is ideal in maintaining pressure at a distant point without any electrical requirements because it functions 100 per cent on hydraulics.”

“WITH SINGER’S PFC VALVE, WE REDUCED OUR MAINTENANCE BUDGET BY 68 PER CENT AND WE RECOVERED OUR INVESTMENT IN ONLY 90 DAYS.”

- Sergio Mendonça, Chief Engineer, Water and Sewage Department, São Bernardo, Brazil

SINGER PRV REDUCES MALAYSIA'S WATER LOSS

Their Challenge

In Malaysia’s southern state of Johor, SAJ Holdings is responsible for sourcing raw water as well as the treatment and distribution of potable water. With an average water leakage rate of 30 per cent, SAJ Holdings wanted to find a way to reduce nighttime pressures, thus reducing leakage and major line breaks.

Our Solution

Reducing leaks in some areas, however, required more than a standard PRV. Having the ability to accurately control both daytime and nighttime pressures was an important element of the application. Working with Ranhill Water Services, the state’s water utility consultant, Singer Valve achieved that by customizing a standard PRV with two pilots—one set for daytime pressure and one set for nighttime pressure—and a latching solenoid equipped with a battery-operated timer.  “Instead of controlling the pressure based on flow requirement,” says Brad Clarke, Singer Valve’s general sales manager, “this application controls pressure via a timing device.” 

The Result

Within two years, more than 50 units of the Singer PRV with Latching Solenoid Selectable Setpoint were installed throughout the state. As a result, the state of Johor is meeting its pressure management goal because they can accurately control daytime and nighttime pressures and they have reduced their water loss.

 “THE VALVES ARE WORKING WELL AND REPAIRING AND SERVICING THEM IS QUITE EASY. WE HAVE BEEN ABLE TO KEEP OUR CONSUMERS HAPPY BY CONTROLLING THEIR WATER PRESSURE.”

- Ludin Khanafee, Works Manager, Ranhill Water Services 

Pressure Management Saves Indonesian City 75% in NRW, Improves Pipe Breakage by 300%, and Reduces Power Consumption by 33%

Their Challenge 

To address high leakage rates, daily pipe bursts and insufficient water levels caused by aging infrastructure.

• High leakage rates
• Daily pipe bursts
• Low reservoir levels due to leakage and pipe bursts
• Lack of water supply
• 30% of city's population deprived of water suppl

Our Solution 

138 units of Singer Valve’s S106-2-PR-BT ranging in size from 100mm to 500mm

The Result

• Reduction of pressure during high demand in the daytime, and further reduction to night time pressure
• 75% reduction in original water leakage rate 
• 300% reduction in pipe breakage (thus saving the client money on annual maintenance and repairs)
• 33% reduction in city power consumption  
• City of Malang expanded water service to an additional 25,000 connections (amounts to roughly 125,000 people)

"I can sleep well at night knowing the vast majority of customers now have reliable water."

- Mr. Teguh Cahyono, Director of Non-Revenue Water, City of Malang Water Department