Dynamic changes in the filtration efficiency of cooling oil filter media

Metal-working fluids are used in machining and grinding operations to cool the tool andwork piece, reduce the friction between the tool and work, improve the surface integrityof the work piece and increase tool life and productivity. The removal of oil mists from airstreams is very important in a wide range of industrial applications, and filtration is by farthe most effective method for this task. This article presents the results of changes in thefractional efficiency of the filtration process of the test aerosol through multistage filteringsystems of different thickness and miscellaneous structural characteristics in the cross-section.The efficiency of filtration through multistage filtering systems was tested with the useof DEHS and DOP aerosol. Research results indicate the functional dependence of filteringproperties on the structural parameters of nonwovens and machining process parameters,as well as on the physicochemical parameters of liquid aerosols. This may be of essentialimportance in forecasting the use of multistage filtering systems as filtering media for agiven process of liquid aerosol filtration, given the maintenance of the most advantageousfiltration conditions, i.e. high efficiency of filtration and low resistance of aerosol flow.