MODEL：F67Q/F71Q/F68Q/F69Q/F116Q/F117Q
44
In this formula，V
R
——Resin volume (m
3
)
The brine tank brine refill speed is related to the inlet pressure. The real
refill time should be 1 to 2 minutes longer than the calculated time in
order to refill enough water in the brine tank. (The brine tank should be
equipped with liquid level controller)
⑤ Fast Rinse Time T5
T5=12×H
R
(min)
Generally, the water for fast rinse is 3～6 times of resin volume, and
fast rinse time can be ranged from 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
related to the quality of resin. Down-flow
regeneration, take 800 ～ 900. Up-flow
regeneration, take 900～1200.
K——Security factor, always take 1.2～2. It is related
to the hardness of inlet water: the higher the
hardness is, the bigger the K is.
⑦ Set Interval Backwash Times (Only for F68Q/F69Q)
When the turbidity of raw water is higher, the interval backwash time
could be set F-00. That is to say, backwash in each regeneration; when
the turbidity is lower, the interval backwash time could be set F-01 (or
other number value), it is to say that backwash in every two regeneration.
Thus, Service → Brine & Slow rinse → Brine refill → Fast rinse →
Service → Backwash → Brine & Slow rinse → Brine refill → Fast rinse.
⑧ Regeneration Time: The whole cycle for regeneration is about two
hours. Please try to set up the regeneration time when you don’t need to
use water according to the actual situation.
The above calculation of parameters for each step is only for
reference, the actual proper time will be determined after adjusting by
water exchanger supplier. This calculation procedure of softener is only
for industrial application; it is not suitable for small softener in residential
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