| Définition | Seuil de coupure | Niveau | |
| FP | Particule filtration | De 1 à 1000 µm | |
| MF | Micro Filtration | De 0.1 à 1 µm | |
| UF | Ultra Filtration | De 0.11 à 0.1 µm | Macro moléculaire |
| NF | Nano Filtration | De 0.001 à 0.01 µm | Moléculaire |
| RO | Reverse Osmosis Inverse | < 0.001 µm | Ionique |
Microfiltration is a separation process of suspended matter or emulsified oils from liquids like water or organic solvents.
The separation is done on the basis of particle exclusion. This process does not depend on temperature particle weight. It is a process that operates at low pressure with high flows.