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T
8. Flow chart
A-F1
Prefilter 5 µm
and
hardness stabilizer
V1 3-Way ball tap:
V2 Feedwater solenoid valve:
A-P1 Pressure boosting pump: Raises the inlet pressure up to the required operating
A-F2 Reverse osmosis
module:
V3 Pressure hold valve:
V4 Rinsing solenoid valve:
QIA 300 Permeate
conductivity cell:
V5 Check valve:
Prevents particles > 5µm from entering the system.
Serves to stabilize water hardness.
For switching from normal operation to emergency supply.
Is closed when the system is at stand-by or at a standstill. It
prevents water from flowing in when the system is not in
use.
pressure.
Contains a semi-permeable, thin film composite spiral-
wound membrane.
Serves for adjustment of the operating pressure and the
water conversion factor (see section 8).
Opens when the membrane is to be cleaned, prior to and
after production of pure water and at least every 12 hours.
Measurement device for determining the conductivity of the
water subsequent to reverse osmosis, as parameter for
permeating water quality.
Prevents water backflow into the reverse osmosis module
when the system is operated in emergency supply mode.
Thermo Fisher Barnstead Pacific AFT
Pure water system
15
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