2 phase separator design calculator – Vertical degasser

This is a sample of the 2 Phase separator design calculator. To access the working calculator, please sign up for free membership trial.

This calculator can be used to size a vertical two phase separator for removal of gas bubbles or a vertical degasser vessel. This calculator determines the minimum required size of such a separator to handle the given flowrates based on terminal velocities velocity of gas bubbles (also reported in results). The minimum requirement of residense time between High / Low liquid levels and High High / Low Low alarm levels should depend on the project standards. It should be noted that the vessel size calculated here is the absolute minimum requirement and the recommended size should be bigger than this with a margin.

Liquid Flowrate m3/hr
Gas Flowrate m3/hr
Liquid Density kg/m3
Gas Density kg/m3
Liquid Viscosity cP
Gas Viscosity cP
minimum gas bubble diameter to be separated micron
L/D ratio (TL-TL length/dia.)
Desired residense time between HHLL (alarm) and HLL minutes
Desired residense time between LLL and LLLL (alarm) minutes
Type of vessel head
Gas bubble terminal velocity m/s
Vessel Volume m3
Vessel Diameter m
Vessel Height (TL-TL) m


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