... , counter-flushing intensity low (6.7L/Sm2), rate of percolation quick (24-26m/h), does not harden ... supplement 5-10% then.The oil elimination rate reaches 95%, the oiliness drops to below 5mg ... s water treatment in the petroleum, has degree of hardness to be high, the wearability, resistant ... SpecificationITEM NO.UNITDATA1. Oil removal rate%90-952.Seston removal rate%95-983. Filtration ratem/h20-254 ...