ductile iron butterfly valve manufacturers in USASVR Global is one of the leading ductile iron butterfly valve manufacturers in USA •Available materials -Ductile Iron•Size: 1/2?- 64”•Class: 150 to 2500•Nominal Pressure: PN10 to PN450•Operations: Lever , Gear operated , Electric actuated and Pneumatic Actuated•Ends: Flanged (FF,RF,RTJ), Buttweld, So...