Different valve body and bonnet materials are suitable for different media temperatures. Understanding this is crucial for correct valve selection and minimizing unnecessary losses. Austos Valves introduces some commonly used valve body and bonnet materials and their applicable media temperatures!

The maximum applicable media temperature for ductile iron valve bodies and bonnets is 350℃.

The maximum applicable media temperature for gray cast iron valve bodies and bonnets is 250℃.

The maximum applicable media temperature for high-silicon cast iron valve bodies and bonnets is 120℃.

The maximum applicable media temperature for malleable iron valve bodies and bonnets is 300℃.

The maximum applicable media temperature for Cr5Mo alloy steel valve bodies and bonnets is 550℃.

The maximum applicable media temperature for carbon steel valve bodies and bonnets is 425℃ (forgings 16Mn, 30Mn can reach 450℃).

The maximum applicable media temperature for copper alloy valve bodies and bonnets is 200℃.

The maximum applicable media temperature for titanium valve bodies and bonnets is 300℃.

The maximum applicable media temperature for 1Cr18Ni9Ti and Cr18Ni12Mo2Ti stainless steel valve bodies and bonnets is 600℃.

For rubber diaphragm valves, the temperature varies depending on the type of rubber: natural rubber 60℃; nitrile rubber, chloroprene rubber 80℃; fluororubber 150℃. When rubber or plastic is used for valve lining, the temperature resistance of the rubber or plastic should be followed.

Ceramic and glass valves have poor temperature shock resistance and are generally used below 90℃.

The maximum applicable media temperature for plastic valve bodies and bonnets is: nylon 100℃, chlorinated polyether 100℃, polyvinyl chloride 60℃, polychlorotrifluoroethylene -60~120℃, polytetrafluoroethylene -180~150℃.