Pentair FLECK 9000 SXT, Installer Manual, Page: 29 / 118

Installer manual Fleck 9000 SXT - System sizing
Ref. MKT-IM-020 / C - 21.11.2019 29 / 118
Salt amount
[g/L
resin
]
Corresponding resin
exchange capacity in [g/L
resin
]
as CaCO
3
°f.m
3
[per L
resin
]
°dH.m
3
[per L
resin
]
140 53.8 5.38 3.01
150 55.5 5.55 3.1
170 58.5 5.85 3.27
200 62.7 6.27 3.5
230 66.9 6.69 3.74
260 71 7.1 3.97
290 75.3 7.53 4.21
To calculate the system mass capacity:
M
capacity
= V
resin
× C
resin ex
with:
M
capacity
: system mass capacity [g as CaCO
3
]
V
resin
: volume of resin [L]
C
resin ex
: resin exchange capacity [g/L
resin
as CaCO
3
]
To calculate the system combined capacity:
C
capacity
= V
resin
× C
cor resin ex
with:
C
capacity
: system combined capacity [°f.m
3
or °dH.m
3
]
V
resin
: volume of resin [L]
C
cor resin ex
: corresponding resin exchange capacity
[°f.m
3
/l or °dH.m
3
/l]
To calculate the system volume capacity:
V
capacity
= M
capacity
/ TH
inlet
Or
V
capacity
= C
capacity
/ TH
inlet
with:
V
capacity
: system volume capacity [m
3
]
M
capacity
: system mass capacity [g as CaCO
3
]
C
capacity
: system combined capacity [°f.m
3
or °dH.m
3
]
TH
inlet
: inlet water hardness [mg/L as CaCO
3
or °f or
°dH]
Mandatory
If a mixing device is set on the valve before meter, use TH = TH
INLET
- TH
OUTLET
!
Having determined the previous capacity allows the operator to know the service cycle duration.
4.2.4 Valve configuration
Knowing the volume of resin, tank size and specifications of the resin, it is possible to determine
the required valve configuration. The resin specification will give the backwash velocity, as well as
the brine draw and slow rinse velocity that must be respected in order to ensure a proper