Vacuum Pump Capacity Calculation | Xls

For viscous flow (rough vacuum), short, large-diameter pipes are critical.

While paid tools exist (VacuCad, Leybold’s Online Tool), a robust free XLS was published by the under an open license. Look for "EVF_Pump_Calculator_v3.xls" on academic or engineering repositories. It includes preloaded pump curves for Edwards, Pfeiffer, and Busch. vacuum pump capacity calculation xls

Final S=Seff×1.25Final cap S equals cap S sub eff end-sub cross 1.25 Structuring the Vacuum Pump Capacity Calculation XLS For viscous flow (rough vacuum), short, large-diameter pipes

$$t = \fracVS \cdot \ln\left(\fracP_1P_2\right)$$ For viscous flow (rough vacuum)

Cell formula: = (B2 * LN(B3/B4)) / B5 → This gives average speed in m³/s. Convert to m³/h: multiply by 3600.