... U type butterfly valve Material:s.s c.s DN:2"~48". Disc: Ni-plated ductile iron, Nylon coated ductile iron, 304S. S, 316S. Body: Cast iron, ... 2"to12" 16bar, 14"to48" 10bar1)Size: DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM, NBR, ... : 2"to12" 16bar, 14"to48" 10barSize: DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM, NBR, ...