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## API Series Oil/Water Separators Sizing Spreadsheet

Below is a link to an API oil water separator sizing spreadsheet developed by Hydro-Flo Technologies.

By inputting the major design criteria, you can solve for the separation chambers width to length to depth ratios.

The spreadsheet operates on Microsoft Excel 2003 or later.

API sizing calculations

Below is a sample shot of the spreadsheet.

Hydro-Flo Technologies, Inc.
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Company
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API Separator Calculations

USER INPUT IN YELLOW
Design Flow rate (in gpm) 250
Temperature (in deg F) 60
Specific Gravity of the Oil (in g/cm3) 0.850
Oil Droplet size (in microns) 150
Density of the Water (in g/cm3) 0.99890
Viscosity (in Poise) 0.01129

For more detailed information go to www.HydroFloTech.com

RESULTS
Width of separator in feet 6.500
Depth of separator in feet 2.500
Length of separator in feet 32.500

Oil Droplet (in cm) 0.015

Call 630-762-0380 to talk to a Hydro-Flo application engineer

Minimum Allowable Result Design Maximum Allowable Result
terminal velocity (in cm/s) 0.162 0.162 0.162
terminal velocity (in ft/min) 0.318 0.318 0.318
Minimum cross sectional area needed (in ft) 11.139 11.139 11.139
Cross Sectional Area (in square feet) 11.139 16.250 160.000
maximum horizontal velocity (15*vt, but must be <=3) 3.000 3.000 3.000
horizontal velocity (in ft/min) 3.000 2.057 0.209
vh/vt 9.423 6.459 0.656
short-circuiting factor 1.491 1.395 1.194
Length of unit (must be at least 5X of width) (in ft) 5.000 32.500 100.000
length/width 5.000 5.000 5.000
minimum horizontal area 156.527 146.444 125.341
Width of channel (in feet) (must be 6 to 20) 1.000 6.500 20.000

 Depth (in feet)
0.300 2.500 10.000
Depth/Width Ratio (must be .3 to .5) 0.300 0.385 0.500