8
Figure 3. Labaqua HPLC / Bio scheme
3.2.
Operation principle.
3.3.
The hydraulic diagram of the Biosan Labqua water purification system can be seen
in figures 2 and 3.
3.4.
The input valve controls intake of feed water from the access. The first cleaning stage
is the pre-filter set that uses activated carbon to remove particles, free chlorine, or-
ganics and colloids. The pressure switch controls incoming water pressure.
3.5.
The boost pump maintains pressure for the efficient operation of the reverse osmosis
membrane, deionization module and UV sterilization module (model Bio only). The
feed flow splits on the membrane into the permeate, which diffuses through the mem-
brane, and the concentrate, which passes over the membrane, carrying away con-
taminants through the drain. The permeate proceeds to the deionization module
where the remaining dissolved contaminants are removed.
3.6.
Before entering the tank, model Bio sterilizes the water with an UV lamp. Water qual-
ity is controlled by Grade II water conductivity sensor. LCD display shows these val-
ues.
3.7.
Purified water is stored in the tank. Water in the tank meets the requirements of ISO
3696 Grade II.
3.8.
To obtain Grade I water, the Grade II water in the storage tank must pass through a
recirculation loop. For model Trace this loop consists of a recirculation pump, a pol-
ishing module, a Grade I water sensor and a dispense port with microfilter. Models
HPLC and Bio additionally include a photooxidation module and a TOC monitor.
Model Bio has an ultrafilter instead of a microfilter.
