Cast Steel Flanged End Top Entry Ball Valve 1.Size:2"-60" 2.Material:WCB,A105,LF2,LCB, ... .Operator:Manual,Worm Gear,Electric etc6.Fireproofing,Static electricity proof,Blow out proof stem7.Application: long distance transportation pipe for oil ... ,GB/T 13927 Cast Steel Flanged End Top Entry Ball Valve