Normal Flow Filtration (NFF) Calculator
Calculate the required productivity, required filter area, and number of 10 inch Equal.
Please enter filter capacity from previous tests, filter media in use, process volume requirement (L) and time requirement (h). If you want to convert the calculated filter area given in m2 to cm2, in2 or ft2 please use the Area converter. For volumetric flow rates other than L/min please use the Volumetric flow rate converter.
Productivity is calculated by using the formula: Productivity = Process Volume(L)/Time(h)/60
Filter area required is calculated by the formula: Filter area = Volume(L)*(1/Filter capacity (L/m2) + 1/Water permeability(LMH/psig)*14.7*time(h))
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