Valve caused by the existence of the many industries the problem is that after the reform and opening up the market to expand rapidly, and the original state-owned enterprises have brass gate valve was not a high level of machine-building industry, and township enterprises (private enterprises), the proliferation of rapidly developed a low starting point, technical force is very weak, poorly equipped, mostly to imitate the production of products, coupled with the confusion in the market, especially with the low pressure water supply and drainage valves, a serious problem. Over the past decade, in a small number of valves, driven by enterprises, there is marked improvement, and some species even reached the international advanced level, there are also many business enterprises in the second. However, on the whole, the gap is still very great, a lot of work to do. To this end, in 2010 respectively, by 2020 advances in technology, development planning has very important significance.
Commonly used valves
To the drainage project, widely used in low-pressure brass ball valve, in particular, large-diameter low-pressure valve (low pressure valve is the PN ≤ 1.6MPa Nominal pressure valve), and medium pressure valves (PN2.5-6.4MPa) than less. The valve, butterfly valve is the most fundamental and most widely used products.