FREE-VALVE Corrosion Resistant Ceramic Lined Floating Ball Valve are that V-port ceramic ball provides precise throttling control in the valve’s opening and closing, with more accurate and flexible adjusting performance.Besides,the self-lubricating capability of engineering ceramic ensures the good sealing after polishing,during the opening and closing process,the V shaped channel of the ball and ceramic seat have a wedge-shaped shearing effect,which can cut off fibers and particles in media during the opening and closing process to prevent the ball core from sticking.