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V-shaped regulating ball valve

The invention discloses a V-shaped regulating ball valve which comprises a valve block, a valve passage, a rotatable ball spool inside the valve passage, and a valve seat. The valve seat comprises two circular steel plates and a circular spacer plate between the two circular steel plates. The outer diameter of the circular spacer plate is smaller than or equal to that of the circular steel plates, while the inner diameter of the circular spacer plate is larger than the circular steel plates. Space is reserved between the two circular steel plates. The inner wall of each circular steel plate is fully attached to the outer surface of the ball spool. The ball valve and the valve seat in the V-shaped regulating ball valve do not readily damage and are well tight, so that operating efficiency and lifetime of the V-shaped regulating ball valve are increased effectively.