PackCol performs hydraulic design for new packed columns or rating calculations for existing columns and towers. The design basis can be pressure drop, maximum capacity or pressure drop. Includes a database of packing types, but custom data can be used. The Eckert and Robbins correlations are included to cover the full flowrate range. Results can be printed in tabular form, and plotted as a Generalised Pressure Drop Correlation diagram or as an Operating Diagram. Detailed manual and tutorial included in Word v6 format.