... " 10bar1)Size: DN50~DN1200 U Type Butterfly Valve. Seat: EPDM, high temperature EPDM, ... Butterfly Valve. Seat: EPDM, high temperature EPDM, food grade EPDM, NBR, abrasive Shaft: 416S. Sand316S. S, 17-4pHS, aluminum bronze and monel.resistant ... NBR, Viton, high temperature Viton, Hypalon, Silicon rubber PTFE Bushing: Glass backed PTFEover EPDM, PTFE over NBR, Neoprene. U type butterfly valve ...