Aqua-Base ZD 12 Manuel Utilisateur page 12

3. DESCRIPTION
31. WATER SYSTEM (see on board installation layout p22)
REP. DESIGNATION
EdM Hull fitting
V0 Hull valve
A/B/C/ Feeding pipes
D/F
H HP piping
1 Strainer
2 Inlet 3 way valve
3 LP feeding pump
4 Filter
LP Switch
7 High Pressure Pump
8 Pulsation dampener
10 R/O module
M Gauge
11 Cleaning valve
12 Pressure regulating valve
14 Fresh water flowmeter
15 Salinity cell
16 Diversion valve
HP Switch
L Reject piping
R Hull fitting
O Reject pipes
E Rinsing pipes
N Cleaning pipes
FONCTION
Always immersed, it insures continuous sea water feeding of the unit. Not included in the supplies.
Situated near the hull fitting, insures shutting of sea water feeding. Not included in the supplies.
Insures feeding of the unit through the LP pump (3), the filters (4) and the flowmeter.
Direct the water under pressure towards the membranes.
Stops the big impurities.
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.
Feeds the filters under positive pressure and sufficient flow. Should be installed below the water line in
order to avoid any intake of air in the circuit.
Contains an element insuring sea water filtering at 5µ.
Automatically stops the unit in case of insufficeint feed water pressure.
Driven by an electric motor, it raises sea water pressure to the required value.
Squeezes pressure points at the HP pump outlet.
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.
By opening this valve, the valve (2) itself being turning to rinsing position, the unit can be operated in
closed circuit on a bucket containing cleaning solutions. See Chap. 77.
Insures adjustment of the pressure in the membranes, conforming to instructions given in Chap.2.
Indicates the flow of fresh water produced by the unit.
Continuously measures the salinity of the produced water, and controls the valve (16) 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 (piping P), if it isn't.
Automatically stops the unit in case of overpressure in the system.
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 reject to the sea of brine (piping L) or/and produced water towards the piping P if the salinity is not
correct.
Insure feeding of the unit with the water or chemical solutions contained in an auxiliary bucket, during the
membranes rinsing and cleaning operations.
Direct the unit discharge towards the auxiliary bucket, thus insuring membranes cleaning in closed
circuit.
VERSION 01/2007
AQUABASEZD 01-2007 FR-GB.doc
FR/GB Page 12/26