Valves are devices that regulate the flow of fluids and gases in various industrial systems. They have many applications in different sectors such as oil and gas, pharmaceuticals, power generation, mining, food manufacturing, and more. Valves can be classified into different types based on their function, design, material, and size. Some of the most common types of valves are Control valves, Safety relief valves, Pressure release and vacuum relief valves, Gate valves, Globe valves, Check valves, Plug valves, Ball valves, Butterfly valves, Hydraulic valves, Needle valves, Pinch valves and Disc valves. Each type of valve has its own advantages and disadvantages depending on the process requirements. Choosing the right valve for a specific process requires a good understanding of the process conditions and the valve characteristics.