Described herein is a Ball Valves which provides improved sealing. The Ball Valves has a ball and a dual ball seat arrangement, such that the ball seat arrangement provides two points of sealing against the ball. This dual seal feature allows for primary and secondary sealing of the ball when pressure is applied from above, below or both above and below. When pressure is acting from above only, a primary seal is created at a first point. At the second point, the seat is closely positioned or in contact with the ball. When pressure is acting from above and below, both points on the seat are in contact with the ball.

According to a first aspect, there is provided a BALL VALVES comprising a housing, a ball seat disposed within the housing, and a ball rotatably movable within the housing, and engageable with the ball seat in order to provide a seal within the ball valve and the ball seat, wherein the ball seat comprises a first seat surface and a second seat surface, each seat surface being independently capable of engaging the ball, the first seat surface being capable of engaging the ball to form a first seal, and being arranged such that pressure acting from above pushes the first seat surface against the ball; the second seat surface being movable relative to the first seat surface and being capable of engaging the ball to form a second seal, the second seat surface being arranged such that pressure acting from below causes the second seat surface to move relative to the first seat surface and pushes the second seat surface into contact with the ball.

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