Valve is a fluid delivery system in the control unit, with the cut-off, regulation, diversion, to prevent the reverse flow, pressure regulation, diversion or overflow relief and other functions. Valve can be divided into industrial control valves and civil valves, industrial control valve is mainly used to adjust the industrial automation process control in the field of media flow, pressure, temperature, liquid level and other technological parameters. According to the different classification standard, industrial control valve can be divided into different types: according to the regulation form, can be divided into the regulation of type, cut off type, regulating off type; according to the body material, can be divided into metal and non metal type, metal body lining type; according to the driving mode, can be divided into electric type, pneumatic type, hydraulic type, manual type; according to the temperature range, can be divided into ultra-low temperature valves, cryogenic valves, valve temperature, temperature valve, high temperature valve; according to the pressure range, can be divided into the vacuum valve, low pressure valve, pressure valve, high pressure valves, high pressure valve.
China's valve industry originated in the last century in 60s, in the last century before 80s only the production of more than and 600 varieties, more than 2 thousand and 700 specifications of valve products, lack the ability of design and production of high parameters, high technology content of the valve. In order to meet the industrial and agricultural production of China's rapid development of high parameter and high technology content of the valve needs, from the last century at the beginning of 80s, China began to adopt independent development and introduction of technology combined with the development technology of the valve part of the valve backbone enterprises to increase R & D efforts, the introduction of technology climax valve. At present, our country has been able to produce gate valve, globe valve, throttle valve, ball valve, butterfly valve, diaphragm valve, plug valve, check valve, safety valve, relief valve, drain valve and other valves, a total of 12 categories, more than 3 thousand types, more than 40 thousand specifications of valve products.
Valve is one of the key equipments in the fluid control system, which is generally used in the control environment of the liquid or gaseous state.
Therefore, the valve is widely used in various industrial areas involved in the control of fluid. Currently, the main application areas include: oil and gas, electricity, chemical, water and sewage treatment, papermaking, metallurgy, pharmaceutical, food, mining, nonferrous metals, electronics and other industries. Among them, the oil and gas, energy and electricity and chemical industry is the most important application areas of the valve.
According to ValveWorld statistics, the global industrial valve market demand, including drilling, transportation and petrochemical, oil and gas sector accounted for the highest, reaching 37.40%, followed by the energy and chemical industry demand, market demand accounted for 21.30% and 11.50% of the global industrial valves, the top three in the field of market demand total demand 70.20% of the total market. While in the field of application of domestic industrial valves in chemical industry, energy, electricity and oil and gas industry is the main sales market, the valve market demand respectively of the total domestic demand valve market industry 25.70%, 20.10% and 14.70%, together accounted for 60.50% of the total market demand.
From the market demand, water conservancy and hydropower, nuclear power, oil and gas industry in the future demand for the valve will remain strong trend, mainly in the following aspects:
In the field of water conservancy and hydropower, the State Council issued the "energy development strategy action plan (2014-2020)" pointed out: by 2020, and strive to reach 350 million kilowatts of conventional hydropower installed. Hydropower installed capacity growth will bring a large demand for the valve, the continued growth of water conservancy and hydropower investment will stimulate the prosperity of the water industry valve.