... the regeneration, counter-flushing intensity low (6.7L/Sm2), rate of percolation quick (24-26m/h), does not harden, is not ... up enterprise's water treatment in the petroleum, has degree of hardness to be high, the wearability, resistant to compression is ... to the oily sewage processing effect. Fruit Shell Filter Sand Technical SpecificationITEM NO.UNITDATA1. Oil removal rate%90-952.Seston removal ...