21
Rinsing Procedure
Rinsing can be performed one of the following two ways:
Batch Method
(1)
Install the modules in the unit.
(2)
Feed rinse water to the raw water tank.
・
Use clean water for the rinse water.
・
Use raw water if clean water is not readily available.
(3)
As illustrated in Fig.1, fill the feed tank with rinse water and rinse the modules until a
uniform chemical concentration is achieved throughout the entire system--about 10
minutes.
(4)
Then drain the water in the tank and modules.
(5)
Repeat Steps (3) and (4) several times.
(6)
Completion of rinsing is determined by measuring the Ca concentration or the hardness.
Alternatively, rinse completion may be determined by observing the conductivity difference
between the rinse water and permeate.
・
See pages 23 and 24 for standard conductivity vs. hardness.
(7)
Perform ordinary filtration upon completion of rinsing.
Figure 1
Example 1 of Rinsing Out the Preservative Solution of the
UNA series
Modules (Batch
Method)
Rinse Water
Tank
