South American Valve are leading AWWA Butterfly valve suppliers in Brazil.An AWWA Butterfly Valve is a type of valve specifically designed for use in water distribution and treatment systems Description: Material: Cast Iron, Ductile Iron Class: 150 to 300. Nominal Pressure: PN6 to PN25. Size: 1″ to 72″. Ends: Wafer, Lug, Flanged