FINAL PUMP SIZING: Corrected Speed w/o Conductance (m³/h) =B13 B8 -> 732.8 Effective Speed with Conductance (m³/h) =1/( (1/B14) + (1/(B7/3.6)) )? (unit careful) Simpler: Required Pump Nominal Speed (m³/h) =B14 1.2 (20% conductance reserve) -> 879.4
The most widely used formula for calculating vacuum pump capacity is (also known as the pump-down time equation): vacuum pump capacity calculation xls
A basic XLS sheet often fails in real-world scenarios because it ignores dynamic system variables. Ensure your advanced spreadsheet accounts for these factors: Vapor Pressure and Condensable Gases FINAL PUMP SIZING: Corrected Speed w/o Conductance (m³/h)
For standard industrial vacuum applications (e.g., thermoforming, woodworking, packaging), use a 30% safety factor . For chemical processes with unknown outgassing profiles, scale up to a 50% safety factor . use a 30% safety factor .
Enter the application requirements in columns A to C, and use the following formulas to calculate the pump capacity: