Vacuum Chamber Pump-Down Time & Conductance Calculator
Determine evacuation time from atmosphere to target vacuum ($t = \frac{V}{S_{eff}} \ln\frac{P_i}{P_f}$), foreline pipe conductance, and effective pumping speed.
Chamber & Vacuum Pump Data
Rotary vane / scroll pump rating
KF25=25mm, KF40=40mm, KF50=50mm
1 atm ≈ 1013 mbar
Pump-Down Time & Conductance
Total Evacuation Time
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Effective Speed (S_eff)
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Viscous Conductance
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Decades Pressure
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Flow Regime
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Vacuum Dynamics Summary
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