Vacuum Pump Capacity Calculation Xls May 2026

Calculating vacuum pump capacity typically involves two scenarios: evacuating a vessel (pump-down) or maintaining a steady state against leaks and process loads. 1. Essential Formulas for Excel To build your spreadsheet, use these primary formulas: Evacuation Time (Pump-Down):

• Total gas load Q_total = Q_leak + Q_outgas
• Convert pump-down time to seconds: t_sec = t × 60

Part 1: The Core Physics – Understanding the "Pump-Down Curve"

Before touching Excel, you must understand the basic equation governing vacuum pump sizing: The Ideal Gas Law applied to a flow system. vacuum pump capacity calculation xls

INTERMEDIATE CALCULATIONS: Volume/Time ratio (L/s) =B3/B6 -> 33.33 Ln(Pi/Pf) =LN(B4/B5) -> 5.31 Ideal Speed (L/s) =B10B11 -> 177.0 Ideal Speed (m³/h) =B123.6 -> 637.2 Total gas load Q_total = Q_leak + Q_outgas