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ISO 16137:2006PublishedIndustrial valves — Check valves of thermoplastics materialsInternational Standard · Published 14 Mar 2006 · ISO/TC 138/SC 7 ISO 19240:2017PublishedIndustrial valves — Lined metal quarter turn and check valves for chemical process and related industriesInternational Standard · Published 10 May 2017 · ISO/TC 153