Check Valves are the valves, which enable the liquid to flow in one direction only. These are primarily used to prevent the back flow of media. Also, these can prevent the process flow that can make damage to the equipment. Main task of these is to protect the pumps in the liquid applications or compressors. Check Valves can deal with the backflow and have a basic design that allows high level of productivity. These are accessible to clients with a simpler design and can work without any human interaction. Operation of these rely on the flow velocity of the fluid. Advantages include prevention of backflow, pressure sustenance and capacity to work as the backup systems.