What are the types of valves and their general classification methods?

Classification of valves based on their purpose or primary structural characteristics.

General classification categorizes valves by both operating principle and structure, representing the most widely used classification method domestically and internationally. Common types include: gate valves, globe valves, plug valves, ball valves, butterfly valves, diaphragm valves, check valves, throttle valves, safety valves, pressure reducing valves, steam traps, and control valves.