Definition and classification of China's industrial valve industry

Definition and classification of China's industrial valve industry

A valve is a type of equipment used to regulate, control, and direct the flow of media such as liquids, gases, and fluidized solids. It possesses functions such as stopping, regulating, directing, preventing backflow, stabilizing pressure, diverting, or relieving pressure through overflow. Industrial valves are widely used in fields such as oil and gas, electricity, metallurgy, water affairs, and chemical engineering, and are an important component of industrial equipment. There are numerous types of industrial valves, which can be classified according to their different purposes, engineering pressures, medium temperatures, valve materials, and driving methods. Based on their principles and functions, industrial valves can be divided into block valves, check valves, safety valves, regulating valves, and diverter valves according to their purposes; vacuum valves, low-pressure valves, medium-pressure valves, high-pressure valves, and ultra-high-pressure valves according to engineering pressures; ultra-low-temperature valves, low-temperature valves, room-temperature valves, medium-temperature valves, and high-temperature valves according to medium temperatures; metal material valves, non-metal material valves, and metal valve body lined valves according to valve body materials; and automatic valves, power-driven valves, and manual valves according to driving methods (see Figure 2-1).

Classification of industrial valves

  Classification Criteria        Category                   Description