Valve is one of most important components in the industry piping systems, it is the control switch and regulator of the fluid flow. Valves are a common final control element for a process control system to maintain pressure, temperature, composition, or other process quantities. There are many types of valves with strengths and weaknesses for particular application, each valve has unique performance characteristics.
To suit various working conditions and different needs, there are regular types of valve design in general.