... 4.Can do special design 5.MOQ 1pcs ProductCast iron ball valveSize15~200mmMaterialCast ironStandardISO,ANSI,ASTM,API,DINApplicationWater,air,non-corrosive ... plastic at present,sealing well,can be completely sealed.Has also been widely used in the vacuum system.4. Easy to operate ... movable,easy to dismantle and replace.6. Sealing surface of ball and valve seat is separate with media when full open ...