Koch Membrane Systems, Inc.: The FLUID SYSTEMS® ROGA® line of cellulose acetate membranes offers smooth surface morphology, neutral charge and chlorine tolerance. The cellulose acetate ultrafiltration element uses a low-pressure membrane for natural organic and color-removal applications. The high-rejection reverse-osmosis elements deliver a 98-percent chloride rejection rate at medium pressure and tolerate low-level, continuous chlorine additions. ROGA reverse osmosis elements are available in a variety of sizes for new systems or as replacements for existing systems.

 

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