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ISO 10631:2021PublishedIndustrial valves - Metallic butterfly valvesInternational Standard · Published 4 May 2021 · ISO/TC 153ISO 16136:2006PublishedIndustrial valves — Butterfly valves of thermoplastics materialsInternational Standard · Published 14 Mar 2006 · ISO/TC 138/SC 7ISO 16138:2006PublishedIndustrial valves — Diaphragm valves of thermoplastics materialsInternational Standard · Published 14 Mar 2006 · ISO/TC 138/SC 7ISO 10631:2013WithdrawnMetallic butterfly valves for general purposesInternational Standard · Published 26 Aug 2013 · ISO/TC 153ISO 10631:1994WithdrawnMetallic butterfly valves for general purposesInternational Standard · Published 21 Apr 1994 · ISO/TC 153