SEV Orbit ball valve is applicable for the oil and petroleum products, natural gas, chemical pipeline and station, as a shut-off medium flow. The ball rotates around the center line of the body to open/close the valve. Switching frictionless, single seat design, low valve torque, and the wedge seal structure makes the valve sealwill not affected by the change of pipeline differential pressure, sealing performance is reliable under various conditions. The self-cleaning structure of the sealing surface further enhances the service life of the valve.