Valves are widely used in various industries, mainly petroleum, petrochemical, chemical, metallurgy, electric power, water conservancy, urban construction, fire protection, machinery, coal, food and others. Among them, users in the machinery and chemical industry are most concerned about the valve market. The valve requirements are also higher). In the current market, the valve users in the industry, the most common types of valves are ball valves, globe valves, gate valves, safety valves; secondly butterfly valves and regulating valves; third, check valves; four, pressure reducing valves, sewage valves And steam traps; five, for shutoff valves and diaphragm valves; six, for plug valves, plunger valves and other valves. The amount of ball valve, globe valve, gate valve, safety valve and rear level valve is quite different, and its total output accounts for 63.6% of the output of various valves (in terms of production units per ton). Valves are used in the field of machinery, metallurgy, petrochemical, chemical, urban construction and other industries. Especially in the machinery industry, all kinds of valves are basically used. In addition to the machinery industry: Safety valves are mainly used in chemical industry; butterfly valves are mainly used in petrochemicals and metallurgy; diaphragm valves are mainly used in metallurgy, electric power and chemical industry; Check valves are mainly used in metallurgy, chemical industry and petrochemical; globe valves are mainly used in petroleum and chemical industry; shut-off valves are mainly used in metallurgy, petrochemical, chemical and electric power; sewage valves are mainly used in petrochemical and chemical industry; ball valves are mainly used in petroleum and chemical industry. And metallurgy; The gate valve is mainly used in chemical, electric power and urban construction; the regulating valve is mainly used in chemical, metallurgy, electric power and food; the plunger valve is mainly used in petrochemical and metallurgy; the plug valve is mainly used in chemical industry and metallurgy; the pressure reducing valve is mainly used in petrochemical, Chemical and metallurgical; Steam traps are mainly used in chemical and petrochemical industries; The continuous development of various industries also requires more valve companies to develop and produce high-end markets that are in line with international standards, and thus continue to promote the development of high-tech and practical technologies in the entire valve industry.