Ball valve for high temperatures

摘要: A hollow valve body limited by two coupling flanges contains a rotatable ball with passageway extending through the and flanges, sealing ring formed of plastic material which flows in hot state such as polytetrafluoroethylene being placed between one flanges. An annular recess is downstream flange proportional capacity to total volume ring. The endowed freedom displacement from normally-closed position it capable bearing on metallic seat event high-temperature flow