Pentair FLECK 3150 NXT - System sizing; Recommendations; Sizing a softener (single unit); Parameters to be considered

Installer Manual Fleck 3150 - NXT - System sizing
24 / 122 Ref. MKT-IM-010 / B - 28.05.2018
4. System sizing
4.1. Recommendations
4.1.1. Injector/DLFC/BLFC-Valve configuration
4.2. Sizing a softener (single unit)
4.2.1. Parameters to be considered
Whenever installing a softener, it is preferable to have full water analysis to ensure the inlet water
content will not affect the resin bed.
Note
Please consult your resin manufacturer specifications to ensure that no additional
pretreatment prior to softening is required.
The below sizing method can be applied for both residential and industrial softeners.
The sizing of a softener must be based upon certain parameters:
• inlet water hardness;
• peak flow rate and nominal flow rate;
•service velocity;
•salt dosage.
The softening and regeneration reactions are driven under certain conditions. To allow these
reactions to take place, make sure that the velocity is convenient during the different phases for
proper ion exchange. This velocity is given in the resin manufacturer specifications sheet.
Brine
syst.
Tank
Diameter
Resin
volume
Injector DLFC BLFC
[in] L DF Color UF Color [gpm] DF [gpm] UF [gpm]
3150/
1800
24 283 - 424 4 Green
4 Green
20.0
5.0 5.030 284 - 425 5 Red 25.0
36 426 - 605 6 White 5 Red 35.0
42 566 - 850 7 Blue 6 White 50.0
10.0 10.0
48 851 - 1200 8 Yellow 7 Blue 70.0
54 1201 - 1550 9 Purple
8 Yellow
80.0
60 1551 - 2000 10 Black 100.0