Tank Based Water Treatment Systems

Service & Reconditioning Values

Softener - Hardness Removal

Service Flow Rates 5 to 15 GPM/SF - Standard 10
Backwash - 5 Minutes @ 5 GPM/SF
Regen Draw - 17 Minutes @ 1.25 GPM/SF
Slow Rinse - 60 Minutes @ 1.85 GPM/SF
Fast Rinse - 6 Minutes @ 2 GPM/FT3 of resin
Softener Systems - Fiberglass

Carbon Filters - Dechlorination

Service Flow Rates 10 to 15 GPM/SF - Standard 10
Backwash - 5 to 15 Minutes @ 10 GPM/SF
Forward Rinse - 2 Minutes @ 10 GPM/SF
For Detailed Catalog Information:
Carbon Filters - Fiberglass
Carbon Filters - Steel

Carbon Filters - Organics Removal

Service Flow Rates 3 to 5 GPM/SF - Standard 3
Backwash - 5 to 15 Minutes @ 10 GPM/SF
Forward Rinse - 2 Minutes @ 10 GPM/SF
For Detailed Catalog Information:
Carbon Filters - Fiberglass
Carbon Filters - Steel
Carbon Filters - Food & Beverage

Neutralizer Tank - pH Correction

Service Flow Rates 4 to 6 GPM/SF - Standard 5
Backwash - 5 to 15 Minutes @ 8 to 12 GPM/SF
Forward Rinse - 2 Minutes @ 10 GPM/SF

Greensand - Iron, Manganese & Sulfide

Service Flow Rates 3 to 4 GPM/SF - Standard 3
Backwash - 10 to 15 Minutes @ 12 GPM/SF
Forward Rinse - 2 Minutes @ 10 GPM/SF
For Detailed Catalog Information:
Greensand Filters - Fiberglass
Greensand Filters - Steel

Multi-Media Filters - Particle Removal

Service Flow Rates 5 to 15 GPM/SF - Standard 10
Backwash - 10 to 15 Minutes @ 15 GPM/SF
Forward Rinse - 2 Minutes @ 10 GPM/SF
For Detailed Catalog Information:
Multi-Media Filters - Fiberglass
Multi-Media Filters - Steel

We use the Tank Flow Rate Table and the Service & Reconditioning Values to estimate how a Tank Based Water System will work. You can first determine how large a tank based system you will need by looking at the Service Flow Rates and then checking for Tank Size in the table.

For example, for Boiler Feedwater Softening, to remove hardness at a flow rate of 25 GPM, use 10 GPM/SF as the Standard Service flow rate. To get to 25 gpm in the table, at 10 GPM/SF we see a 24 inch tank will work.

See Cartridge Type DI Systems for Cartrdge DI.
See Exchange Tank Type for small portable off-ste Regenerable Systems.
See Laboratory Water Systems for water used for solutions make-up in the lab.

Finally, we also determine from the table, how much water the softener will use for regeneration.

Backwash - 5 Minutes @ 5 GPM/SF
5 X 10.9 = 54.5 Gallons
Regen Draw - 17 Minutes @ 1.25 GPM/SF
17 X 3.9 = 66.3 Gallons
Slow Rinse - 60 Minutes @ 1.85 GPM/SF
60 X 5.8 = 348 Gallons
Fast Rinse - 6 Minutes @ 2 GPM/FT3 of resin
6 X 6(FT3) X 2 = 72 Gallons

Total Gallons Used = 540.8

You can use this approach for any Tank Type treatment process.