An axial flow valve is like a fancy straw that you use to drink your juice. But instead of drinking, it helps to control the flow of liquids or gases in big machines.
Now imagine if you put a small propeller in that straw and you blew air on it, it would spin. This is how axial flow valves work - with the help of a propeller-like part called an impeller.
The impeller sucks in the liquid or gas from one end of the valve and then spins it around really fast as it moves through the valve. This fast spinning helps to control the flow of the liquid or gas and regulate its speed.
Axial flow valves are used in big machines like pipelines and turbines. They are important because they help to make sure everything works correctly and safely.