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Alloy 20 butterfly valve

This alloy has higher amounts of nickel and chromium than 300 series stainless steel and with the addition of columbium, this alloy retards stress corrosion cracking and has improved resistance to sulfuric acid. Alloy 20 finds wide use in all phases of chemical processing. commonly used as interior trim on butterfly valves.
A351 CN7M: This material is usually used as Higt Performance Double Offset Butterfly Valve Series 5000 Body  and  Disc,it is suitable for Sulphuric acid,Phosphoric acid,etc.
B462/N08020: This material is usually used as N/A Champing Ring,  it is suitable for Dilute hydrochloric acid,Sulphuric acid,Phosphoric acid,etc.