Non Return Valve

A non-return valve is a simple mechanical device that is used to allow a medium pressure flow in any one direction. It helps the fluid to travel with a medium velocity in one direction and prohibits the reverse flow of the fluid caused by very high pressure. The non-return valves cause a very high-pressure drop which is a drawback for it. it also helps to prevent the upstream types of equipment that could get damaged by reverse flow such as water pumps. They are also known as check valves. The non-return valves are available in various types such as clapper type, swing type, spring-loaded, etc. they could be manually operated or also by automated actuation.