If you use a fire nozzles that can be manually controlled, then every time you use it on the floor, you may be injured or fall down when playing. If you use one that is controlled by air pressure, then you must keep the air pressure regulated, which will occupy more time and manpower. It’s very easy to control with automatic control. And It’s very safe. Automatically shut off fire nozzles, which can save labor and improve working conditions. It’s more economical to use automatic fire nozzles.