... .Standard:ISO.ANSI,ASTM,API,DIN 4.Can do special design 5.MOQ 1pcs ProductCast iron ball valveSize15~200mmMaterialCast ironStandardISO,ANSI,ASTM ... fluid resistance,the whole diameter of the ball basically has no flow resistance.2. Simple structure,small and light.3. Tight ... sealed.Has also been widely used in the vacuum system.4. Easy to operate,open and shut rapidly,from fully open ...