A valve is a device that opens, closes, or partially obstructs the passage of a fluid.
There are different types of valves used in various industries. They can either be classified according to their design or their function. Based on design, the most common valves include gate valves, ball valves, butterfly valves, plug valves, globe valves, check valves, and pressure relief valves. Valves are sometimes classified according to their function such as isolation valves, regulation valves, safety relief valves, non-return valves, and special purpose valves.
Choosing the right valve type and size is important to optimize costs and ensure safe, accurate and reliable operation.