System Sizing; Recommendations; Injector/Dlfc/Blfc-Valve Configuration; Sizing A Softener (Single Unit) - Pentair FLECK 3150 NXT Installer Manual

Installer Manual Fleck 3150 - NXT - System sizing
4.

System sizing

4.1.

Recommendations

4.1.1. Injector/DLFC/BLFC-Valve configuration

Tank
Brine
Diameter
syst.
[in]
24
30
36
3150/
42
1800
48
54
60
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.
24 / 122
Resin
volume
L DF Color
283 - 424 4 Green
284 - 425 5 Red
426 - 605 6 White
566 - 850 7 Blue
851 - 1200 8 Yellow
1201 - 1550 9 Purple
1551 - 2000 10 Black
Injector
UF Color
4 Green
5 Red
6 White
7 Blue
8 Yellow
Ref. MKT-IM-010 / B - 28.05.2018
DLFC BLFC
[gpm] DF [gpm] UF [gpm]
20.0
25.0 5.0
35.0
50.0
70.0
10.0
80.0
100.0
5.0
10.0