| 摘要 |
A valve connected to a fluid pipe line and having a valve chamber and at lea st one inlet port (3) and one outlet port (4), the valve comprising a ball (5) mounted in the valve chamber between a pair of seats (8, 9), and having an exterior surface and two ends and a fluid passageway extending between the t wo ends, the ball (5) is turned by a stem (6) for selective adjustment between an open and a closed position, with the ball (5) and stem (6) having an axis of rotation perpendicular to the centerline between the inlet (3) and outlet (4 ) ports, and the ball (5) having the centerline for its fluid flow passageway at an angle different from perpendicular to the axis of rotation of the ball (5 ).
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