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

Desalinated water typically contains low levels of acid or alkali, which can be more corrosive to rubber materials. This corrosion leads to issues such as expansion, aging, and a reduction in strength. As a result, rubber-lined butterfly valves and diaphragm valves often perform poorly, primarily due to the rubber's poor resistance to chemical attack. Although fluorine-lined diaphragm valves offer improved corrosion resistance compared to standard rubber-lined ones, they still have limitations. Specifically, they are not able to withstand the mechanical stress from folding during operation, which can lead to structural damage and a shorter service life. Currently, the most effective solution is to use a specialized ball valve designed for water treatment applications, which can last between 5 to 8 years under normal operating conditions. This type of valve provides better durability and reliability in environments where desalinated water is involved, making it a preferred choice in many industrial settings.

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