Dosing polymer with Peristaltic pumps Three Dura 10 pumps on polymer dosing. These pumps replaced progressing cavity pumps that were experiencing dry running problems resulting in high maintenance costs. Initially, the Dura pumps suffered from reduced hose life. Investigations revealed that the Polymer called Clarifloc SE1080, caused the hoses to soften and swell. Engineers at Verder supplied Buna hoses which now provide excellent hose li

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