Turbomolecular Pump Compression Calculator
High-vacuum physics: Calculate molecular compression ratios ($K_0$) across gas species ($N_2, Ar, He, H_2$), maximum permissible foreline backing pressure, and rotor blade speed ratios.
TMP Rotor & Stator Specifications
Pairs of rotor/stator blades
Foreline Backing Vacuum Conditions
Compression Ratios by Gas Species
N₂ Compression Ratio:
--
K_0(N₂)
H₂ Compression Ratio:
--
K_0(H₂) — light gas limit
Blade Tip Speed:
--
m / s
He Compression:
--
K_0(He)
Max Backing Press:
--
mbar critical
Theoretical Ultimate Inlet Base Pressure ($P_{inlet} = P_{fore} / K_0$)
Nitrogen Ultimate Pressure $P_{N_2}$:
--
Hydrogen Partial Pressure $P_{H_2}$:
--
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