MODEL 51240B/53540B/53640B/61240B/63540B/63640B
34
3.4. Parameter settlement
① Service timeT1
Water treatment capacity：
Q=V
R
×K÷Y
D
（m
3
）
Hardness of Inlet Water (mmol/L)
Exchange factor (mmol/L) 400～1000.
Down-flow regeneration, take 400 ～
750. If the inlet water hardness is
higher, the factor is smaller.
Resin volume (m
3
)
By days：T1=Q÷Q
d
（Day ）
Water treatment capacity per day (m
3
/d)
Water treatment capacity (m
3
)
② Backwash time T2
It is subject to the turbidity of inlet water. Generally, it is suggested to
be set 10～15 minutes. The higher the turbidity is, the longer backwash
time can be set. However, if the turbidity is more than 5FTU, it had better to
install a filter in front of the exchanger.
③ Brine& slow rinse time T3
T3=(40～50)×H
R
（min.）
Generally, T3=45H
R
（min.）
In this formula, H
R
——The height of resin in exchange tank (m.)
④ Brine refill time T4
Down-flow regeneration：T4＝0.45×V
R
÷Brine refill speed (min.)
In this formula, V
R
—— Resin volume (m
3
)
The Brine refill speed is related to inlet water pressure. It is suggested
to lengthen 1~2 minutes of calculated brine refilling time to make sure there
is enough water in tank. （The condition is that there is a level controller
installed in the brine tank）
⑤ Fast rinse time T5
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