| 摘要 |
According to the present invention, a pressure balancing ball valve comprises: a valve body having an internal flow passage; a ball provided with a flow passage hole penetrating a middle portion thereof, and rotatably mounted on the internal flow passage of the valve body to allow a longitudinal direction of the flow passage hole to coincide with a longitudinal direction of the internal flow passage or cross the longitudinal direction of the internal flow passage; a stem wherein one end thereof is mounted on the ball after penetrating a side wall of the valve body, and a longitudinal direction thereof coincides with a rotating axis of the ball; and a pair of sheets formed in an annular shape to surround both entrances of the flow passage hole of an outer surface of the ball. A separation space isolated from the outside of the valve body is secured between the outer surface of the ball and an inner surface of the valve body. One or more connection holes connecting the flow passage hole and the separation space are formed on the ball to fill the separation space with a fluid flowing through the flow passage hole and the connection holes. |
