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3 – DESCRIPTION
3.1 – WATER SYSTEM (SEE FLOW CHART NEXT PAGE)
In the basic version, water makers XA are made up of the following elements :
REP.
DESCRIPTION
SWI
Hull fitting
V0
Hull valve
A/B/C
Feeding pipes
1
Rinsing valve
2
Filter 5µ
3
High Pressure Pump
4
HP Switch
5
R/O module
6
Gauge
7
Pressure regulating valve
8
Cleaning valve
9
Salinity cell
10
Production valve
11
Check valve
18
Air bleed valve
50
Sea Strainer
51
Low pressure pump
G
Reject piping
SWO
Hull fitting
N
Cleaning pipes
M
Rinsing pipes
See the On board Installation XA in ANNEXES page 49.
FUNCTION
Always immersed, it ensures continuous seawater feeding of the unit. Not included in the supplies.
Situated near the hull fitting, insures shutting of seawater feeding. Not included in the supplies.
Insures feeding of the unit through the filter (2).
Manual 3-way valve insuring feeding of the unit, either with sea water in normal operating, or with the
water or chemical solution contained in a bucket during rinsing or cleaning of the membranes.
Contains an element insuring sea water filtering at 5µ.
Driven by an electric motor, it raises sea water pressure to the required value.
Automatically stops the unit in case of overpressure in the system.
Made up of pressure-resistant vessels, containing the membranes in which the desalination of sea
water is carried out.
Indicates the pressure in the R/O membranes.
Insures adjustment of the pressure in the membranes, conforming to instructions given in Chap C.
By opening this valve, the valve (1) itself being turning to rinsing position, the unit can be operated in
closed circuit on a bucket containing cleaning solutions. See Chap. C-3.
Continuously measures the salinity of the produced water, and controls the valve (10) according to
this measure.
Electromagnetic 3-way valve controlled by the salinometer. It automatically directs the produced
water towards the tank (piping K) if the salinity is correct, or towards discharge to the sea, if it isn't.
Avoids accidental return of brine towards the production system.
Connected to the reject pipe (C), must be closed only for cleaning/rinsing operation.
Contains an element ensuring seawater filtering to protect the booster pump (LP).
Feed the filter under positive pressure and sufficient flow. Must be installed 200mm below the
water line.
Collects the concentrated brine produced by the membranes for discharge to the sea.
Situated above the water line, insures brine discharge to the sea. Not included in the supplies.
Insure feeding of the unit with the water or chemical solutions contained in an auxiliary bucket, during
the membrane rinsing and cleaning operations.
Direct the unit discharge towards the auxiliary bucket, thus insuring membrane cleaning in closed
circuit.
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VERSION 2009-02-D
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