Sizing a Filtration System
Most fuel contaminants will settle from still fuel resulting in a stratification of fuel with contaminants concentrated in the lower strata. Therefore, it is necessary to circulate and filter the lower 25-33% of the tank contents. When the Smart-Filter is properly installed, fuel will be drawn from the bottom of the tank and returned with minimal disturbance of the settled strata resulting in good filtration performance and removal of contaminants and water.
It is recommended to size the SmartFilter to circulate and filter 25-33% of the tank capacity in a nominal 8-hour run period, once each week.
20,000 gallon tank example:
• 25% of 20,000g = 5000g to circulate and filter in an 8-hour period
• 5000g/8 hours = 625 GPH or 10.4 GPM
• Use the Simplex SF-10 SmartFilter
• For the same tank filtering 33%, or 6600 gallons, run the SF-10 for 11 hours or specify the SF-20 and run for 5 hours