With the requirements of petrochemical industry development and technological progress, the demand for high-parameter general-purpose valves has increased, such as high-temperature valves with a temperature of 500-900℃; low-temperature valves with a temperature of -40-190℃; high-pressure valves with a pressure of 300-500Mpa; Especially valves with inflammable, explosive, highly corrosive, and toxic media have put forward higher and stricter requirements on the safety, functional reliability and service life of the valve.
    In the choice of valve material and manufacturing process, first of all, we must meet the requirements of use, improve the safety and reliability of the valve, and pay attention to being economical. In recent years, many new high-performance materials have appeared, such as various highly corrosion-resistant titanium and zirconium metal materials, nanomaterials, organic synthesis and polymer materials, industrial ceramics and other inorganic non-metallic materials and various composite materials. At the same time, many castings New technologies and new technical equipment such as welding, spray welding, spraying, compounding, sintering and other forming and surface treatments are being applied to valve production.
   The general valve technology level is relatively high, and the development speed is fast. It is mainly manifested in: the valve is developing in the direction of large-scale, high-parameter, automatic and complete sets, and the product series are increasing. The new valve products have high quality, reliable sealing and long life; Specialized research, with a scientific research and testing base, which can conduct various tests such as thermal performance, dynamic performance, wear resistance, earthquake resistance, fire resistance, and reliability, and can perform various performance tests on products.