Why desalinated water medium using rubber lined butterfly valve, lined diaphragm valve life is short?

Desalinated water medium contains a low concentration of acid or alkali, they are more corrosive to rubber. Rubber is corrosive performance of expansion, aging, low strength, with rubber lining butterfly valve, diaphragm valve are poor results, its essence is caused by rubber intolerance. Liner rubber diaphragm valve improved corrosion-resistant performance of fluorine-lined diaphragm valve, but lined with fluorine diaphragm valve can not withstand the collapse of the upper and lower folded, resulting in mechanical damage, valve life shorter. Now the best way is to use special ball valve water treatment, it can be used to 5 to 8 years.

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