Automatic water supply controller for water tank

The utility model relates to an automatic water supply controller for a water tank, which is composed of a valve core, a valve seat, a water inlet and a water outlet. The utility model is characterized in that one end of a shaft rod of the valve core is connected with a valve post and a return spring, the side wall of the valve seat is connected with the water inlet and the water outlet, the positions of the shaft lines of the water inlet and the water outlet are staggered, and the end head of the water outlet is provided with a check valve. The utility model is used for supplying water to the water tank and has the advantages of reliable control, large range of controlling pressure, small flow resistance, compact structure, etc. The automatic water supply controller for a water tank is suitable for various airtight pressure vessels and is used for controlling the constant pressure of the fluid amount and the vessels.