In the field of water conservancy and hydropower, the strategic action plan for energy development (2014-2020) issued by the general office of the State Council points out that by 2020, we will strive to reach about 350 million kilowatts of conventional hydropower installed capacity. The increase of installed capacity of hydropower will bring a lot of demand for valves. The continuous growth of investment in water conservancy and hydropower will stimulate the water industry valve to be one of the key equipment of fluid control system. At present, the main application fields of valves include: oil and gas, electric power, chemical industry, tap water and sewage treatment, papermaking, metallurgy, industry; among them, oil and gas, energy, electricity and chemical industry Field is the most important application field of valve.

According to the forecast of McIlvaine company, the market forecasting agency, the demand for industrial valves will reach 100 billion US dollars by 2030, of which the energy demand of developing countries is the main factor to promote the demand development; it is expected that the growth rate of the market scale of China's industrial valve industry will be stable at about 7% from 2015 to 2017, far higher than the growth rate of the global industrial valve industry.

The valve is the control part of the fluid conveying system, which has the functions of cut-off, regulation, diversion, prevention of countercurrent, stabilization, diversion or overflow. The valve can be divided into industrial control valve and civil valve. The industrial control valve is mainly used to regulate the medium flow, pressure, temperature, liquid level and other process parameters in the field of industrial automation process control. According to different classification standards, industrial control valves can be divided into different types: adjustment type, cut-off type and adjustment cut-off type according to the adjustment form; metal type, non-metal type and metal valve body lining type according to the valve body material; electric type, pneumatic type, hydraulic type and manual type according to the driving mode; ultra-low type according to the temperature range Temperature valve, low temperature valve, normal temperature valve, medium temperature valve and high temperature valve; according to the pressure range, they can be divided into vacuum valve, low pressure valve, medium pressure valve, high pressure valve and ultra-high pressure valve. China's control valve industry originated in the 1960s. Before the 1980s, it could only produce more than 600 varieties and 2700 specifications of valve products, lacking the ability to design and produce valves with high parameters and high technology content. In order to meet the rapid development of China's industrial and agricultural production demand for valves with high parameters and high technology content, since the early 1980s, China began to take the idea of combining independent development and introduction of technology to develop valve technology. Some key valve enterprises increased their efforts in technology research and development, which led to the climax of valve introduction technology.

At present, China has been able to produce gate valve, stop valve, throttle valve, ball valve, butterfly valve, diaphragm valve, plug valve, check valve, safety valve, pressure reducing valve, drain valve and other valves in 12 categories, more than 3000 models and 40000 specifications. Valve is one of the key equipment of fluid control system, which is generally used in liquid or gas fluid control environment. Therefore, valves are widely used in various industrial subdivisions involving fluid control. At present, the main application fields of valves include: oil and gas, electric power, chemical industry, tap water and sewage treatment, papermaking, metallurgy, pharmacy, food, mining, non-ferrous metals, electronics and other industries. Among them, oil and gas, energy, electricity and chemical industry are the most important application fields of valves.

According to the statistics of valveworld, the market demand of global industrial valves, including drilling, transportation and petrochemical, accounts for the highest proportion, accounting for 37.40%, followed by the demand of energy, electricity and chemical industry, accounting for 21.30% and 11.50% of the market demand of global industrial valves respectively, and the market demand of the first three fields accounts for 70.20% of the total market demand. In the application field of domestic industrial valves, the chemical industry, energy power industry and oil and natural gas industry are also the main markets for valve sales. The market demand for valves accounts for 25.70%, 20.10% and 14.70% of the total market demand of domestic industrial valves respectively, accounting for 60.50% of the total market demand.

From the perspective of market demand, the demand for valves in the water conservancy and hydropower, nuclear power and oil and gas industries will remain strong in the future, which is mainly reflected in the following aspects: in the field of water conservancy and hydropower, the strategic action plan for energy development (2014-2020) issued by the general Office of the State Council points out that by 2020, conventional hydropower installation will reach about 350 million kilowatts. The increase of installed capacity of hydropower will bring a lot of demand for valves, and the continuous growth of investment in water conservancy and hydropower will stimulate the prosperity of water industry valves.