As the world economy is warm up, the import and export of valve products is also increased, but the competition of international valve market is also growing. There is still a large gap for high-technology valve products between China and foreign countries, Therefore, welco valve think the technology of valve products will become a bottleneck restricting our development for a long time period hereafter.
The valve is an equipment of flow control for oil, chemical, power plants, long-distance pipelines, shipbuilding, nuclear industry, a variety of cryogenic engineering, aerospace and marine oil and other economic sectors. After years of development, The quantity volume of Chinese valve companies ranks the first in the world, about more than 6,000 units, which have 900 units over 5 million yuan annual output value. From a product capacity point of view, the valve industry in China has been able to produce more than a dozen categories of products, such as gate valve, globe valve, ball valve, butterfly valve, safety valve, check valve, throttle valve, plug valve, pressure reducing valve, diaphragm valves, steam traps, emergency shut-off valve, the maximum temperature reached 1000°C, the lowest temperature is -196°C, the maximum pressure 600Mpa, the maximum diameter is DN5350. In addition, according to the relevant statistics, the annual turnover of chinese valve market is up to 500 billion yuan, which over 100 billion market has been occupied by the foreign enterprises. Though the valve industry in China has been strong developed after chinese reform and opening up, has been reached an achievement. At present, however, the valve industry in China is still some problems in it, such as the valve companies in China mainly aim to low-level, small-scale enterprises, a lot of family workshop enterprises. On the product, due to the duplication of investment, technology investment, the introduction is not enough, the dominant product of the valve industry in China is still low-quality general products.
Commonplace in Chinese enterprises, some of them, there is a variety of out leakage, internal leakage, appearance quality, short life, the operation is not flexible and electric valve actuators and pneumatic devices are not reliable, some products are only the equivalent of the last century international level in the early eighties. For the high temperature and high pressure valves in key department still rely on imports. In addition, the valve industry in China in the industrial structure, the industrial chain of the valve industry, and industry specialization with foreign enterprises there is a big gap.
On the cause of the reasons of low-quality valve products, mainly originally machinery industry level is not high. Due to the rapid expansion of market, the state-owned enterprises were closed and private enterprises developed rapidly. The private and family workshop enterprises is a low starting point, the technical force is very weak, poorly equipment, the problem is serious.
Anyway, after the development of over twenty years, the industry has a big change and the quality is not as before.