Large-caliber valve valves are produced with the production of fluid pipelines. Humans have used valves for nearly 4,000 years. In ancient China, when brine was used to make salt from salt wells, wooden plug valves were used in bamboo pipelines. In 1800 BC, when the ancient Egyptians built large-scale water conservancy to prevent the Nile from flooding, they used similar wooden cock to control the distribution of water flow. These are the prototypes of the valve. The large number of applications of industrial valves began after Watt invented the steam engine. In the early twentieth century, valves made of cast iron, cast steel, forged steel, stainless steel, chromium molybdenum steel, brass and other materials appeared. Used in various industries and various working conditions. There are not many companies that first introduced foreign valve production technology in China. Later, the introduction of foreign production technology has made breakthroughs in domestic valve production technology, improved quality, and extended life.

 

At present, the turnover of my country's valve market is as high as 50 billion yuan, which fully demonstrates the scale and momentum of the development of my country's valve industry. However, in the context of a good industrial situation, there are also some problems worthy of our worry, especially the valve companies in my country are mainly low-level, small-scale, family-based enterprises. This is a big limitation and bottleneck for the future development of my country's valve industry.

 

At present, domestic key valve manufacturers have been able to design and manufacture various valves in accordance with international standards such as ISO international standards, DIN German standards, AWWA American standards, and some manufacturers' products have reached the international advanced level. Although the overall level of the valve industry in the New Year has been greatly improved, the quality is not stable enough, such as running, leaking, dripping, and leakage often appear in domestic valves.

 

In addition, there is still a certain gap between my country's valve supporting capabilities and developed countries. Competition in the valve market is becoming more and more fierce. Some common valve product markets have been saturated and supply exceeds demand. This makes the development of small and medium-sized enterprises more and more difficult. And even high-tech products compete fiercely in the international market. Large diameter valve