OPERATORS MANUAL
ORION II
Orion II 500-10000 Operators
Page 11 of 95
Manual Part no: DOMAON0100 Issue A
April 2008
3.2.2 Pre-treatment Dosing
Option
20
Proportional to Flow
PU20-01 & TK20-01
Dosing set for dosing Sodium Metabisulphite to remove
Chlorine from the feed water.
21
Proportional to pH
PU21-01 & TK21-01
Dosing set for dosing Sodium Hydroxide to raise the pH of
the feed water. This reduces the amount of Carbon Dioxide
and thereby ionic load in the feed to downstream
deionisation equipment.
3.2.3 Pre-treatment Monitoring
Option
25
Hardness Monitor
AE25-01
Feed water hardness monitor.
26
Chlorine Monitor
AE26-01
Feed water chlorine monitor.
27
pH Controller
AE27-01
Measures the pH of the feed water and supplies a control
signal to the Sodium Hydroxide dosing set. This reduces
the amount of Carbon Dioxide and thereby ionic load in the
feed to downstream deionisation equipment.
3.2.4 Purified Water System RO Section
Option
30
Break Tank
TK30-01
Soft Water Break Tank also used for Recirculation of
Purified Water and Cleaning in Place (CIP).
40
Single Pass Reverse
Osmosis
RO40
Removes up to 99% of the impurities from the feed water.
42
Twin Pass Reverse
Osmosis
RO42
Provides a higher degree of purification used on high
salinity feed water, feed water containing high
concentrations of silica or where greater process security is
desired.
3.2.5 Purified Water System Deionising Section
Option
50
Membrane Degasser
DG50
Used where the feed water contains high levels of carbon
dioxide to enhance the operation of CEDI Module.
60
CEDI Module
CD60
Continuous Electrical Deionisation unit removes remainder
of the dissolved ionic impurities.
