The innovation ability of China's valve industry needs to be improved

Although China's valve industry has developed rapidly in recent years, the overall level of the industry is still low, the product technology content is low, and many key valves with high parameters still rely on imports. Some experts estimate that China's valve level is 10 ~ 20 years behind that of foreign advanced countries. Not long ago, in order to strengthen exchanges with the European valve manufacturing industry, China's valve industry successively organized the bosses of more than 10 domestic valve enterprises to visit Europe and learned many valuable experiences from foreign counterparts. At the same time, compared with the foreign valve industry, we also saw our own shortcomings.

Gap in processing technology

In terms of welding process, German KSB company has widely used special welding powder for cobalt free welding in order to meet the radiation resistance requirements of sealing materials for nuclear valves; France Welland valve company completes pre welding preheating, automatic welding and post welding treatment in the same equipment or the same processing production line. Regardless of pre welding, during welding and post welding treatment, the temperature can be automatically controlled to ensure the welding quality.

The domestic valve welding process is backward, and some still use old welding methods. The technical level of welders is low, and the welding materials are also ordinary materials, which can not meet the design requirements of special valves. Many enterprises are busy with production and marketing all day and seldom study and improve the technology.