Pressurizing sealing half-ball valve

The utility model relates to a pressure charging seal-off half ball valve, which mainly includes a driving mechanism, a main valve rod, a secondary valve rod, a valve core, an upper valve body, hermetical pedestal assembly parts and a lower valve body. The hermetical pedestal assemble parts consist of a C-shaped hermetical ring, a pressure charging location ring and a bearing ring. The outside of the C-shaped hermetical ring is a sealing face which matches with the ball face of the valve core. The pressure charging location ring which can drive the C-shaped hermetical ring to transform through charging the gas is arranged at the inner side of the C-shaped hermetical ring, the bearing ring is arranged under the C-shaped hermetical ring and the pressure charging location ring. The novel driving mechanism of the utility model has the advantages of great reduction of the start and close moments, thus saving energy. Meanwhile, the above components reduce the abrasion to zero so that the usage time is extended and nice hermetical performance is gained.