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There are two types of Labaqua water purification systems:
Labaqua HPLC
–
Ultrapure water system for analytical applications. Includes 25 l
water storage tank. Uses tap water as feed water, often referred to
as “tap water system”.
Labaqua Bio
–
Ultrapure water system for molecular biology and cell culture
applications. Includes 25 l water storage tank. Uses tap water as
feed water, often referred to
as “tap water system”.
Principle of operation
The hydraulic diagram of Labaqua water purification system is shown below.
The solenoid valve (Fig. 1/1) controls intake of feed water from the tap. The first
purification stage consists of the pre-filter set (P/N 10019, fig. 1/2 and 1/3) that includes
sediment filter and activated carbon intended to remove particles, free chlorine, organics
and colloids. A pressure switch (Fig. 1/5) controls feed water pressure. If feed water
pressure falls below 0.7 bar, the system will automatically switch on the boost pump (Fig.
1
/4) and “LowPres” message will be shown on the display.
The boost pump (Fig. 1/4) is used to maintain pressure at the level necessary for
the efficient operation of the reverse osmosis membrane (only in the tap water systems,
Fig. 1/9), deionization module (P/N 10310, fig. 1/12), and UV sterilization module (if
installed, P/N 10102, fig. 1/16).
From the boost pump, the feed flow goes to the membrane to be split into two parts:
the permeate, diffused through the membrane, and the concentrate, which passes over the
membrane, carrying away contaminants to the drain. The permeate goes to the third
purification step
– the IonPro deionization module (P/N 10310, fig. 1/12) where the
remaining ions are removed.
Before entering the tank, water is sterilized by UV lamp (if installed, P/N 10102, fig.
1/16); water quality is controlled by Grade 2 water conductivity sensor (Fig. 1/11). LCD
display provides information about the system status.
Purified water is stored in the tank and recirculated on periodical basis. Water in the
tank meets requirements of ISO 3696 Grade II.
Fig. 1. Principle of operation
