Solid particles are permanently retained between the cellulose fibres. 75% of the insert volume forms a cavity structure.
Via capillary attraction, the cellulose fibres absorb all three stages of water (free, emulsified and dissolved water).
For aqueous fluids, we use filter inserts that don’t absorb water.
Oil degradation products
Oxidation residues, varnish, resins and sludge-like degradation products deposit permanently on the cellulose fibres with a combination of adsorption and absorption.
Inorganic acids (nitric acid, sulfuric acid, etc.) dissolved in the water are absorbed by the cellulose with the water. The generation of organic acids is prevented by minimising oil ageing products (precursors).
Field tests from practice confirm that we achieve and maintain the oil cleanliness levels recommended by manufacturers for the most sensitive components.