ALTITUDE SERIES
The Client SAJ Holdings Johor, Malaysia The Challenge Frequent reservoir overows Ongoing repairs to ball-oat valve Difcult access to valve inside reservoir The Solution Singers 301-4 Altitude Pilot The Result Manages highpressure ratings Stopped reservoirs from overowing Eliminated costly repairs
Altitude Pilot Stops Malaysian Reservoir Overowing
Johor Bahru, Malaysia Johor is Malaysias third largest state and one of the most developed. SAJ Holdings is a water utility company based in the state capital of Johor Bahru. It is responsible for Johors water supply system including water treatment and potable water distribution. To service a population of more than 2.7 million, the company must ensure that the states water infrastructure is reliable and effective. But, like most water systems, problems arise. Problems like overowing water reservoirs.
The altitude pilot is a threeway pilot that precisely At one reservoir in Johor, SAJ Holdings realized controls the water level in a the ball-oat valve that maintained the water level reservoir because it senses the demanded frequent repairs due to high pressure. hydrostatic head. Eugene Flooding there and in other reservoirs was a common occurrence. Bahia, Singer Valve Inc.
Unfortunately, the valve was installed deep inside the reservoir so it was troublesome to access and repair, says Zainuddin Ghazali, operations manager for SAJ Holdings. Using a ball-oat valve to control the level caused the diaphragm to wear out sooner due to the frequency that the valve would open and close. In search of a solution, Ghazali contacted Singer Valves Malaysia representative Anand Anandarajah. He recommended the Singer 301-4 Altitude Pilot. Upon hearing that the valve body can be serviced without removing the pilot and that the inner valve can be replaced without disconnecting the pilot tubing, Ghazali felt condent about the Singer solution. The results were impressive. Singers 301-4 Altitude Pilot has beneted us in many ways, says Ghazali. By reducing the number of overows we had at the reservoir, we increased our supply of revenue-generating water. The company also saved tremendous repair costs because the Singer altitude pilot requires minimal manual maintenance. How does the Singer altitude pilot work?

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The altitude pilot is a three-way pilot operated by a spring and diaphragm, says Eugene Bahia, a Singer Valve instrumentation specialist. The pilot precisely controls the water level in a reservoir because it accurately senses the hydrostatic head.
Benets of Singers 301-4 Altitude Pilot Requires minimal maintenance Precisely controls reservoir water levels Adjustable closing speeds, avoiding destructive water hammers How It Works Singers Altitude Pilot valves are spring and diaphragm operated that control the water level in a reservoir by sensing the hydrostatic pressure (height) of the tank. When the hydrostatic pressure equals the Altitude Pilots set point, the Pilot connects the inlet pressure to the bonnet of the main valve, and then the main valve closes. When the hydrostatic pressure drops a certain amount below the Altitude Pilots set point, the Pilot connects the bonnet of the main valve to atmosphere, and the main valve opens. Singer Clients Who Use It Donnacona Institution, Donnacona, Quebec, Canada Los Angeles Department of Water & Power, California Sedapal, Lima, Peru Aguas de Barcelona, Barcelona, Spain
Did You Know The three-way body of the Model 301-4 Altitude Pilot Valve can be serviced without removing the pilot from the valve. The inner valve can be replaced through the bottom of the pilot so the pilot tubing does not need to be disconnected while being serviced.
Singer Valve Inc. 12850 - 87th Avenue Surrey British Columbia Canada V3W 3H9 Tel: 5404 Fax: 8845 Toll-Free Fax: (USA, Canada) E-mail: singer@singervalve.com Web Site: singervalve.com An ISO 9001:2000 Registered Company

301-4, Aug.07 v.1