oil mist filter is a filtration system of superior efficiency it collects 99.97% of oil droplets 0.3 micron and larger, thus removing virtually 100% of oil mist emissions. This performance places oil mist filter 3508094 at the very forefront of oil mist elimination technology., our oil mist filter 3508094 with long service life for Large high speed rotation equipment such as gas turbines, steam turbines, axial and centrifugal compressors, requires a large volume of oil for lubrication, cooling, and sealing of the bearings. The lubricating oil can be either mineral based or synthetic.