MODEL 63504-F63C1/63604-F63C3/73504-F68C1/73604-F68C3
35
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. Up-flow regeneration,
take 450～1000. If the inlet water
hardness is higher, the factor is
smaller.
Resin volume( m
3)
By hours: T1=Q÷Q
h
（Hour）
Water treatment capacity per hour (m
3
/h)
Water treatment capacity（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
should be 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 timeT4
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