The valve is a control component in the fluid conveying system, which has the functions of cut-off, regulation, diversion, prevention of backflow, voltage stabilization, diversion or overflow and pressure relief. Valves can be divided into industrial control valves and civil valves. Industrial control valves are mainly used to adjust process parameters such as medium flow, pressure, temperature, and liquid level in the field of industrial automation process control. According to different classification standards, industrial control valves can be divided into different types: according to the adjustment form, it can be divided into adjustment type, cut-off type, and adjustment cut-off type; according to the valve body material, it can be divided into metal type, non-metal type, Metal valve body lining type; according to the driving method, it can be divided into electric type, pneumatic type, hydraulic type, manual type; according to the temperature range, it can be divided into ultra-low temperature valve, low temperature valve, normal temperature valve, medium temperature valve, high temperature valve; According to the pressure range, it can be divided into vacuum valve, low pressure valve, medium pressure valve, high pressure valve and ultra-high pressure valve.

my country's control valve industry originated in the 1960s. Before the 1980s, it could only produce more than 600 varieties and series and more than 2700 specifications of valve products, lacking the ability to design and produce high-parameter and high-tech valves. In order to meet the demand for high-parameter and high-tech valves in the rapid development of my country's industrial and agricultural production, from the early 1980s, my country began to develop valve technology by combining independent development and imported technology, and some key valve enterprises have increased technology. Research and development efforts, there has been a climax of valve introduction technology. At present, my country has been able to produce gate valves, globe valves, throttle valves, ball valves, butterfly valves, diaphragm valves, plug valves, check valves, safety valves, pressure reducing valves, steam traps and other valves, totaling 12 categories and more than 3,000 models. , more than 40,000 specifications of valve products.

Valves are one of the key devices in fluid control systems, and are generally used in liquid or gaseous fluid control environments.

Therefore, valves are widely used in various industrial segments 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, pharmaceutical, food, mining, non-ferrous metals, electronics and other industries. Among them, the fields of oil and gas, energy, power and chemical industry are the most important application fields of valves.

According to the statistics of ValveWorld, among the global industrial valve market demand, the oil and natural gas fields including drilling, transportation and petrochemical industry account for the highest proportion, reaching 37.40%, followed by the demand in the energy, power and chemical fields, which respectively account for the global industrial valve market. 21.30% and 11.50% of the demand, the market demand of the top three fields together accounted for 70.20% of the total market demand. In the application field of domestic industrial valves, the chemical, energy, power and oil and gas industries are also the most important markets for valve sales, and the market demand for their valves accounts for 25.70%, 20.10% and 14.70% of the total domestic industrial valve market demand, respectively. It accounts 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, mainly reflected in the following aspects:

In the field of water conservancy and hydropower, the "Energy Development Strategic Action Plan (2014-2020)" issued by the General Office of the State Council pointed out that by 2020, strive to reach about 350 million kilowatts of conventional hydropower installed capacity. The growth of hydropower installed capacity will bring a large demand for valves, and the continuous growth of water conservancy and hydropower investment will stimulate the prosperity of valves in the water industry.