Abstract: In one exemplar embodiment, an improved ball valve is provided in which a movable seating ring is concentrically carried by the inner diameter of a spring washer concentrically disposed in the inlet port of the ball valve housing. The spring washer is retained in place about its outer diameter portion by means of a retaining ring removably inserted in the inlet port of the valve body. The spring washer is sealed to the valve body by means of a conventional circular seal disposed between the face of the spring washer and the valve body. When the valve is closed, the differential pressure developed across the ball acts on the outer surface of the spring washer and transmits additional sealing force to the seating ring in contact with the ball for increased sealing.