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Type, performance and working principle of hydraulic control valve
The hydraulic control valve is a hydraulic pressure control valve. It consists of a main valve and its attached conduit, pilot valve, needle valve, ball valve and pressure gauge.
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Detailed explanation: in 2014, the domestic high-end valves went hard and tortuous.
In 2014, China's valve market "cake" although large, but the market competition is also very fierce. Compared with the international advanced level, the domestic valve manufacturing level still has a certain gap. The key valves of high parameters, high temperature, high pressure and high pound have always depended on the domestic valve industry in the domestic valve industry.
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2014 the development of the valve is a long way to go
With the rapid pace of valve industry restructuring, the competition between enterprises in the future valve industry will be the quality and safety of the valve products and the competition between the products brand, the product develops to high technology, high parameter, strong corrosion resistance and high life direction.
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Prospects for the development of China's valve manufacturing industry in 2014
At present, China's valve manufacturing industry has been able to provide some twelve categories, more than 3000 models and more than 4000 specifications for the user sector, whose performance parameters range from vacuum valves to 600Mpa ultra high pressure valves, from deep cold -196 degrees Celsius to 570 degrees centigrade.
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Development trend of high pressure valve in China
From 60s to 02 units (the Ministry of nuclear industry), 194 developed an electric high temperature cut-off valve suitable for the support of military workers at 750 centigrade; in 1970, all kinds of stainless steel valves of all kinds of stainless steel valves used in the 49-3 project (Sichuan Jiajiang high throughput engineering nuclear test reactor) were all 27 specifications and 644 sets. At the same time, the stainless steel valve used in the fuel uranium unit 820 is also made for the combustible unit. It provides DN1000 large diameter and high pressure electric valve for the wind tunnel test of the 03 unit high speed fighter. It provides all kinds of valve products for the 09 nuclear submarine engineering. Won the national defense science and Technology Commission's National Defense Advanced Research Achievement Award for this purpose
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The valve industry will be the competition between product quality safety and product brand in the future.
Since last year, China's high-end valve localization road is very "bumpy". The current basic parts have become a short board to restrict the development of our manufacturing industry to the high-end. In 12th Five-Year, the government will continue to strengthen the efforts to make the high-end equipment components domestically made.
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Select the attention point of the hydraulic control valve
The specifications of various hydraulic control valves, the maximum pressure of the system and the actual flow through the valve, and the control characteristics of the valve, the stability and the size of the port, the size of the shape, the mode of installation, the mode of manipulation, etc., are selected from the sample or catalogue of the product.
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Energy saving has become the principle and goal of the development of the pump valve industry
The development of pump and valve industry is closely related to the development of real estate, construction, industry and engineering projects. In recent years, China's pump and valve industry will lead to a new opportunity for steady and steady growth in China, with a good domestic investment environment and the deepening of the infrastructure policy. However, due to the global financial crisis and many other factors, the development of China's pump and valve industry has been affected by some external factors.
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Common valve faults and preventive measures
This is the main aspect of leakage, often seen in factories.
The reasons for the leakage of the packing letter are the following points:
(1) the packing is not suitable for the corrosion, temperature and pressure of the working medium; (2) the filling method is not correct, especially the whole packing is placed in the coil, which is the most easy to produce leakage; 3. The machining precision of the stem or the surface finish is not enough, or has the ellipticity, or there is a mark; (4) the valve rod has been pitting or rusty because of the lack of protection in the open air; 5 The valve stem is bent; 6. The packing has been used too long, and it has been aging.
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The valve industry has a bright prospect, but the market needs to break through innovative technology.
The price of China's valve market is relatively stable, even though it has a slight rise or fall every year, the scope is very small. The annual production capacity of the product in the valve industry has reached 3 billion and the annual output value is 5 billion yuan. It has become a large and fast developing industry in the light industry of our province. However, there are still some problems in the development speed, the large and medium cut-off valve enterprises are not many, and the product grade is not high.
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