1.Worm gear flanged Ball Valve 2.Standard:ANSI,JIS,DIN 3.Certification:ISO9001-2008 ,CE,API 4.Material:SS,CS,CI 5.Wooden box Worm gear flanged Ball Valve No.1 Chief features1.Full port, floating or trunnion mounted type2.Bolted bonnet3.Blow out proof stem4.Structure improved on api5.Opening and with wormgear operator6.Available with gear operator7.Flanged ends8.Butt-welding endsssure weld Ball ...