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

2017-01-05

Desalted water medium contains low concentrations of acid or alkali, they are more corrosive to rubber. Rubber corrosion is manifested as expansion, aging, low strength, with rubber lined butterfly valve, diaphragm effect is poor, the essence is the rubber is not resistant to corrosion caused. Back rubber diaphragm valve improved corrosion resistance for the good performance of the fluorine diaphragm valve, but the lining of the diaphragm diaphragm can not withstand the folding up and down and was broken, resulting in mechanical damage, the valve life shorter. Now the best way is to use water treatment dedicated ball valve, it can be used to 5 to 8 years.