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To calculate the system mass capacity:
M
= V
× C
capacity
resin
resin ex
To calculate the system combined capacity:
C
= V
× C
capacity
resin
cor resin ex
To calculate the system volume capacity:
V
= M
/ TH
capacity
capacity
inlet
Or
V
= C
/ TH
capacity
capacity
inlet
Mandatory
If a mixing device is set on the valve before meter, use TH = TH
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
regeneration of the unit. From this data, determine the required backwash flow rate as well as the
brine draw and slow rinse flow rate. In most cases, the fast rinse flow rate will be the same as the
backwash flow rate, however for certain valve types the fast rinse flow rate will be the same as the
service flow rate.
To determine the backwash flow rate:
Q
= Fs
x S
backwash
backwash
Ref. MKT-IM-027 / C - 12.11.2019
Installer manual Fleck 4600 MECH - System sizing
with:
M
: system mass capacity [g as CaCO
capacity
V
: volume of resin [L]
resin
C
: resin exchange capacity [g/L
resin ex
with:
C
: system combined capacity [°f.m
capacity
V
: volume of resin [L]
resin
C
: corresponding resin exchange capacity
cor resin ex
3
3
[°f.m
/l or °dH.m
/l]
with:
V
: system volume capacity [m
capacity
M
: system mass capacity [g as CaCO
capacity
C
: system combined capacity [°f.m
capacity
TH
: inlet water hardness [mg/L as CaCO
inlet
°dH]
with:
Q
: backwash flow rate [m
backwash
Fs
: backwash velocity [m/h]
backwash
S: Tank cross section area [m
]
3
as CaCO
]
resin
3
3
or °dH.m
3
]
3
]
3
or °dH.m
or °f or
3
- TH
!
INLET
OUTLET
3
/h]
2
]
29 / 92
3
]
3
]
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