All filters are available with the following filtration grades:
- PF: Interception type filters suitable for solid and oil particles up to 0,1 micron and 0,1 mg/m³
- HF: Interception type filters suitable for solid and oil particles up to 0,01 micron and 0,01 mg/m³
- QF: Pre-filter suitable for the removal of solid particles down to 1 micron including liquids, emulsions and oil particles
- *CF: There are treatments in industrial plants which in addition to oil free air, require the elimination of oil vapors and odor
*CF filters are only available on HDP series because the material of which the filter elements are made does not withstand high temperatures.