MODEL: 63518-N77A1 /63618-N77A3/ 53518-N77B1
30
3.4. Parameter settlement
① Service time T1
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 5 FTU, 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
Down-flow regeneration：T4＝0.45×V
R
÷Brine refill speed (min.)
Up-flow regeneration：T4＝0.34×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
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