Vertical brake type float automatic valve

The utility model relates to a vertical brake type float automatic valve, which is used for tanks in buildings, comprising a valve body, pistons, push rods and a floating ball. The utility model is characterized in that the upper end of the push rods is connected with the pistons, and the lower end is connected with the floating balls. The push rods are penetrated through the locator slides of the lower part of the valve body to make the push rods move vertically in the locator slides. When the water level of the tank rises to the horizontal position that the floating balls is in, the push rods are impelled by the buoyancy of the floating ball, the pistons are propelled into the piston bushes to clog a water inlet, and the watertight purpose is finally achieved. When the tank water level drops to below the horizontal position of the floating ball is in, the floating balls and the push rods together with the pistons drop automatically, the pistons leave the piston bushes, the water goes from the water inlet into the tank through a water outlet, the floating ball is raised up again until the water level rises to the upper limit line, and the watertight purpose is realized. The utility model has the advantages that the push rods move vertically, the moving distance is short, the parts are uneasy to damage, the structure is simple, and the cost is low.