... provide wafer or lug butterfly valve, with various rubber seats, EPDM,NBR,VITON,PTFE,etc. very convenient Butterfly ... . *Seat: Natural rubber/ Hypalon/EPDM/NBR/Viton/PTFE/Polyurethane*Stem: Stainless steel/ Nickel copper alloy.*Bushing: ... Rubber, Hypalon, EPDM, Neoprene, NBR, Viton, PTFE, Polyurethane.etc.9.We can provide various of flange ... BS4504,BS10D&E,JIS10K. Lug Type Rubber Lined Butterfly Valve