When selecting a filter, the key parameters of filter fineness, dirt holding capacity, and the Pressure difference on the filter should be taken into consideration. During the evaluation, it is not sufficient if one parameter is taken into account; all three must be taken into account together. During this process a series of boundary conditions must be taken into account, such as:
- Nature of the pressure fluid and its viscosity,
- Maximum flow rate,
- Required cleanliness level of the pressure fluid (filtration grade),
- Intended temperature range,
- On pressure filters: nominal pressure,
- Intended installation location (suction, pressure, return line filter).