1. Ductile iron body & disc2. Full rubber lining on flanged valves3. Aisi Stainless steel grade 420 shaft4. Fusion bonded epoxy coating5. ISO 5211 bracket installation plate6. 250 psi operating pressure7. Ductile iron disc with Durable 316-grade stainless steel disc edge specifications temperature of media low temperature pressure low pressure power manual media water port size 16 ~144 structure butterfly characteristic awwa c504 butterfly valve design & manufacture awwa c504pre, Temp. Rating asme b16. 34 face to face awwa c504 end connection wafer, Mj, Grooved and flanged inspect & test api 598 standard or nonstandard standard