For among main engine lube oil filter for filtering the working medium of the solid particles and colloidal substances, effective pollution control system.Not the filtrate by filter entry into the filter, the filter after intercepting impurity, leaching liquid by export flow, into the tank.As the filter, filter cake layer thickening, filtration resistance increasing.When reach the set pressure difference, need for backwashing filter elements.Turn off into the liquid, the liquid mouth, to pass into the compressed gas within tank, residual hydraulic filter down to filter tank.After filter backwashing filter column, the liquid exit into the compressed gas huff filter cloth, the interception of filter cake and peeling a crack in the filter cloth material, by lower the eliminator discharge.

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