... : DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM, NBR, abrasive c)Shaft: 416S. Sand316S. S ... Viton, Hypalon, Silicon rubber PTFE Bushing: Glass backed PTFEover EPDM, PTFE over NBR, Neoprene Disc: Ni-plated ductile iron, ... 10barSize: DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM, NBR, abrasive Shaft: 416S. Sand316S. S, 17 ...