... steady function, ant-blasting, wear resisting, strong head resisting the size of product is uniform, damming ... , its filtering velocity is 15-20m3/h, with small head loss; it lowers filtering tank’s height and ... area and pore volume; strong decontamination capacity, generally with 9~10kg/m3, it is as 1.2 ... times as quartz sand filtering.4. High strength; small abrasion; usage life is over 15 years.5. ...