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class600 WCB ANSI cast steel globe valve Materials 1.Body:ASTM A216 WCB 2.Bonnet:ASTM A216 WCB 3.Stem:2Cr13,SS304,SS316,Carbon Steel 4.Stem Nut:brass,Ductile iron 5.Disc:ASTM A216 WCB 6.Seat:13Cr13...