The main function of the leather cage valve is to control the fire water supply, which is connected to water hoses, water guns, etc. to form an indoor fire extinguishing system. It not only has all the functions of a common indoor fire hydrant, but also has the functions of freely rotating water outlet and pressure reduction and stabilization. The characteristic of free rotation brings convenience to installation, while the pressure reduction and stabilization function ensures stable pressure maintenance after the initial bolt, thereby ensuring the safety and reliability of use.