Cast Iron Valves: Type: Butterfly valves, Gate valves, ... /20/25,150LB-2500LB Suitable temperature: -45c~150c Standard: (1)Design and manufacture:DIN3352, BS5163,BS5150, ... Hastelloy (3)Stem: SS416, SS410, SS304, SS431 (4)Seat: NR, Hypalon, EPDM, Neoprene, NBR, Wear-Resistant EPDM, ... type Sealing: Soft sealing or metal-to-metal seat, Flexible graphite Operation: Manual, Pheunatic, Electric, Hydraulic ...