Cast Iron Valves: Type: Butterfly valves, Gate valves, Check valves, Global valves, ... , CF8M, CF8, Hastelloy (3)Stem: SS416, SS410, SS304, SS431 (4)Seat: NR, Hypalon, EPDM, Neoprene, NBR, Wear-Resistant EPDM, Viton, Silicon ... , Plain ends type Sealing: Soft sealing or metal-to-metal seat, Flexible graphite Operation: Manual, Pheunatic, Electric, Hydraulic and Pnewmatic-Hydraul ...