Tank bottom ball valve has special surface designed inlet flange, directly welding and flush mounted at the bottom of reactor, tank, vessel or container, smooth tapered hole and super short distance between the valve ball and bottom can prevent the medium accumulate at the entrance, ensure the medium smoothly discharge. By design with ISO 5211 mounting platform make the actuator easier assembly thus do not need the mounting bracket. Tank vessel bottom ball valve with high performance design features, widely used in Industrial container, pharmaceutical reactor, food processing tank, cosmetics vessel, chemical mixing plant and bioreactor etc.