With China’s rapid economic development, the valve casting industry as a national industry, after several years of trials, to the rapid development in all parts of the country, one of the major industries of the rapid development of the domestic machinery industry, the rapid pace of China’s valve casting industry development, but The more problems, the low level of development of the valve castings, low technological content of products, control valves much better product or a low-grade multi.
The valve is in petroleum, chemical, power station, long distance pipelines, shipbuilding, nuclear industry, various low temperature engineering, aerospace and marine oil and other economic sectors indispensable fluid control did not prepare. According to the pump valve China HR experts survey found that, after years of development, the number of China’s valve business ranks first in the world, about 6,000 more than the size of the valve enterprises, including 900 annual output value of over 500 million. From a product point of view, China’s valve industry has been able to produce more than a dozen categories of products, such as gate valves, globe valves, ball valves, butterfly valves, safety valves, check valves, throttle valves, plug valves, pressure reducing valves, diaphragm valves, trap, emergency shut-off valve, the maximum temperature reached 570 ℃, as low as -196 ° C, the maximum pressure 600Mpa maximum diameter of 5350 mm.
In addition, in accordance with the relevant departments of Statistics, China’s annual valve market turnover of up to 500 billion yuan, of which over 100 billion market but was occupied by foreign valve enterprises. China’s valve industry has been vigorously developing after the reform and opening up, has made no small achievement. At present, however, the valve industry in China still exist some problems, such as the valve company in China mainly to low-level, small-scale, family-owned enterprises.
Product, due to the duplication of investment, technology investment, the introduction is not enough, the leading products of the valve company in China is still low-quality mass products. China’s production of all kinds of valves widespread leakage of internal leakage, the appearance of high quality, short life, the operation is not flexible as well as electric valve actuators and pneumatic devices are not reliable, some products are only equivalent to the 1980 early international level. Some of the high temperature and pressure, and the key device needed valve is still dependent on imports, In addition, China’s valve industry in the industrial structure, industrial chain of the valve industry, as well as the degree of specialization of the industry with foreign enterprises there is a big gap. Domestic low-quality valve products because: the market is expanding rapidly, and the mechanical level of original state-owned enterprises is not high, the township and village enterprises (private enterprise) has developed rapidly. But the low starting point for the village and township enterprises, technical force is very weak, poorly equipped, imitation products are mostly production, especially the low pressure valves used in water supply and drainage, the problem is serious.
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