U type butterfly valve Disc: Ni-plated ductile iron, Nylon coated ductile ... 14"to48" 10bar1)Size: DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM ... Glass backed PTFEover EPDM, PTFE over NBR, Neoprene Disc: Ni-plated ductile iron, Nylon coated ductile iron, ... , 14"to48" 10barSize: DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM ...