Full-welded ball valve, no external leakage or similar phenomena. The sealing ring is made of RPTFE material containing 25% Carbon (Carbon), ensuring zero leakage (0%). The valve body is焊接 from steel pipes, the ball seat is made of reinforced polytetrafluoroethylene, and the valve stem features an explosion-proof design.Temperature: -60-200°C, Inspection Standard: API 598