MODEL 53515/53615/63515/63615/73515/73615
34
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 days：T1=Q÷Q
d
（Day ）
Average water consumption per day (m
3
/d)
Water treatment capacity (m
3
)
② Backwash time T2
Generally, it is suggested to 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
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
T5=12×H
R
（min）
Generally, the water for fast rinse is 3~6 times of resin volume. It is
suggested to be set 10~16 minutes, But it should meet the requirements
of qualified outlet water.
⑥ Exchange factor
Exchange factor =E/ (k×1000)
In this formula, E——Resin working exchange capability (mol/m
3
), it is
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