Catalogue 9 - STAUFF Filtration Technology

A www.stauff.com/9/en/#23 23 Example 2: Selection Return-Line Filter System Information: A Return-Line filter with a Cellulose element with a micron rating of 10 µm is required to clean the oil. No clogging indicator is required. Please note: If the system incorporates either accumulators or cylinders, the return flow can dramatically exceed pump flow and the maximum surge flow should be the flow used to calculate the pressure drop through the filter. Data given: Q max : 100 l/min Oil type: ISO 68 Temperature max.: +60°C Viscosity υ operating : 29 mm²/s Density ρ : 0,882 kg/dm 3 Micron rating: 10 µm (see table on page 19) First Step Pre-selection of the size: RF-030, Q nominal = 110 l/min > Q max Pressure drop values (at viscosity of 30 mm 2 /s) from the flow characteristics: ∆p Hous = 0,30 bar (RF-030 ..., see page 72) ∆p Elem = 0,067 bar (RE-030-N-10-B, see page 72) Determination of the correction factor (see page 22): ∆p Assy = 0,882 ∙ 0,30 bar + 0,882 ∙ 29 ∙ 0,067 bar 0,86 0,86 30 ∆p Assy = 0,37 bar ≤ ∆p max = 0,5 bar In a clean state, this filter fulfills the requirements and is suitable for the application. No further calculation is necessary. The correct filter designation would be RF-030-N-10-B-G16 . Catalogue 9 § Edition 02/2023 Filtration Guideline