In the use of oil filters that are important to note is the filtering capabilities. Therefore, notify the factory for the smallest particles capable filtered by the filter. In general, the measures being taken are microns.
1 micron = 0.00004 inch = 0.001016 mm
For example, currently used in the field yag filters generally filter dirt smallest diameter of 10 microns. While the filters are made of woven wire (wire mest filter), the largest particle that can pass is 150 microns in diameter. Although not as good as the other filters in terms of filtering impurities, this wire barrier filter of small alirnya once, so good once used at the inlet (inlet) hydraulic pump because it will prevent the current kevakukan high pump flowrate. These filters on heavy equipment normally used for engine oil filter (oil filter) and hydraulic oil filter (hydraulic filters).
Table 6 Selection of fuel and lubricants are recommended
Contamination
Fouling events coming from outside of the oil is called contamination. The materials may be gluten contamination, liquid or gas. For example, a piece of metal, pieces of rubber or gaskets, fiber, paint, dust, sand, water, acid etc.
Deterioration
In addition, the oil itself can be a source of destruction, this event is known as deterioration. Besides berdiskulasi in the system, sediment and acids are formed due to heat, oxidation and pressure. These deposits form a kind of adhesive, so as to glue the parts – parts that should rub against each other, closing the small holes and can bind metal particles which will accelerate the process of erosion (wear). While acids along with causing corrosion crust on the surface roughness also components that accelerate the wear and finally adding impurities in the oil.