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Water purification unit with ion exchanger
Powdex® Graver Water Systems

Combining ion exchange and filtration into one unit, the Graver Powdex Process removes iron, copper, silica and salts, whether soluble or suspended. This is the most economical and efficient system yet devised for boiler feedwater purification. Powdex systems have provided for flowrate capacities up to 33,000 gpm (7,500 m3/hr) for a single installation. Originally designed for utility use, the low initial investment and simplicity of operation have made it attractive to utilities and industry alike.

The Powdex system consists of a vessel containing resin-retaining filter elements. A powdered ion exchange resin is placed on the elements and the condensate is passed through the powdered resin, through the element and returned to the condensate flow. Upon exhaustion of the resin or high differential pressure, the resin is discarded and replaced with a fresh supply. The improved kinetics of the powdered resin provides highly efficient ion exchange within the thin layer of resin on the elements. The high efficiency and the highly regenerated form of the resin combine to provide extended run lengths.
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