Abstract: The present invention discloses a bracket used for a ball valve, which includes: at least two supporting legs, and a stopper plate located above the supporting legs; a lower surface of each of the supporting legs contacts an upper surface of a valve body of the trunnion ball valve; and the stopper plate includes a through hole therein passing through a valve stem of the trunnion ball valve. Meanwhile, the present invention discloses a trunnion ball valve, which includes: a valve body, a valve ball, two valve seats, and a valve stem. The valve body includes a valve body cavity and a packing cavity therein. The valve ball and the valve seats are all located within the valve body cavity. The valve stem connecting with the valve ball is located within the packing cavity. Graphite packings are filled between the packing cavity and the valve stem, and the graphite packings are pressed tightly by adjusting the height of a packing gland.

Abstract: The present invention discloses a floating ball valve, which includes a valve body, a ball, (2) valve seats on both inlet and outlet ends, and a valve stem. The valve body includes a valve body cavity therein, the ball and the valve seats are both assembled in the valve body cavity, and the valve stem and the ball are connected and assembled in the valve body, the valve seats are connected to the valve body through elastic elements; and when the floating ball valve is closed, the ball of the floating ball valve and the valve seats both move inside the valve body cavity.

Abstract: The present invention discloses a type of valve seats for a floating ball valve, the valve seats are connected to a valve body both ends of the floating ball valve through elastic elements, and when the floating ball valve is closed, both a ball of the floating ball valve and the valve seats move in the valve body cavity in order to seal.