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Butter?y Valves: Double Flanged, Lug- and Wafer-Type API STANDARD 609 SIXTH EDITION, MAY 2004 Copyright American Petroleum Institute Reproduced by IHS under license with API Not for ResaleNo reproduction or networking permitted without license from IHS --````,,-`-`,,`,,`,`,,`--- SPECIAL NOTES HUDOODZV WLFXODUPDWHULDOVDQGFRQGLWLRQVVKRXOGEHREWDLQHGIURPWKHHPSOR\HUWKHPDQXIDFWXUHURU 1RWKLQJFRQWDLQH