1,Non-abrasion for on-off,which fully resolves the problem of mutual abrasion affecting sealing performances of sealing surfaces I traditional valves.

2,Top-entry construction, with which the valves on pipelines could be online checked and repaired directly. Thus the engine stopping could be effectively minimized to reduce the production cost.

3,Single-seat design, which eliminates those problems affecting safety caused by abnormal temperature-rise form the medium in the paaway of the valve.

4,Low torsional moment design, with the Stem with specially designed structure could be opened or shut down with down with merely a small hand wheel valve.

5,W edge-type sealing construction. Traditionally the valve would be aealed through the mechanical force provided by the Stem to widge-press the ball onto the valve seat. With this design, the sealingper for mance of the valve would nener be influenced by the fluctuation of the pressure differences in pipelines and performance would  be reliably maintained under all the operating modes.

6,Self-purging construction of sealing surface. The fluid inside the pipeline would pass through evenly by 360℃；along the sealing face on the body when the body sidingly leaves the seat. This design not eliminates the scouring on parts on the valve seat by high-speed fluid, but also washes away the piled-up matter on the surface to realize self-purging.