1. open and close with no friction.
2. up-mounted structure. Can check and maintain the valve of pipe on line, reduce the production costs
3. single-seat design. Solve the safety problem of unmorally increasing pressure.
4. low torque design. Special stem design, can easily open and close with a small hand wheel
5. wedge sealing structure. With the mechanical force of stem, push the wedge to the valve seat on the ball to be sealing
6. self-cleaning structure of sealing surface. When ball body leave seat, the fluid go across through sealing surface.
