... DIN 4.Can do special design 5.MOQ 1pcs ProductCast iron ball valveSize15~200mmMaterialCast ironStandardISO,ANSI,ASTM,API,DINApplicationWater,air, ... valve is compact structure,reliable sealing,simple,easy maintenance,sealing surface and spherical often stay in closed state,anti scour, ... light.3. Tight and reliable.It has two sealing surface,sealing surface material is widely used in a variety of plastic ...