U type butterfly valve Material:s.s c.s DN:2"~48". Disc: Ni ... 16bar, 14"to48" 10bar1)Size: DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM, NBR, abrasive c ... to12" 16bar, 14"to48" 10barSize: DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM, NBR, abrasive Shaft ... PTFEover EPDM, PTFE over NBR, Neoprene. U type butterfly valve