All the valves meet the standards of ANSI, API, DIN, BS, JIS and GB of China. The main materials used for valves are A105, WCB, CAST IRON, WCC, WC5, WC6, WC9, CF8, CF8M, CF3, CF3M, and dual-phase stainless steel, etc. The range of pressure of valve is 125LB-2500LB, PN0.6-PN32.0; the range of ambient temperature is -196℃-830℃, the driving mode of valve includes hand-operated, worm wheel transmission, electric-driving, pneumatic- and hydraulic-driving. It is mainly used in petroleum industry, power station, large ship, water supply and drain project, etc.