The hydraulic oil present in oil-hydraulic plants is subject to pollution caused by solid contaminants
Among the most common solid contaminants there are:
Solid contaminants have mostly dimensions smaller than 10 microns.
Some studies carried out on bearings have shown that the average bearing’s life is especially prolonged if a proper filtering, with filters that can hold contaminants with dimensions up to 3 microns, is implemented.
There are few benefits if the filtering is made between 10 and 40 microns.