5
WATERMAKER GROUP.
1.
Reverse osmosis membranes
2.
Manometer
3.
Flow meter
4.
Depressurization valve
5.
Positioner
6.
Reset valve
The watermaker group is constituted of the following components:
Reverse osmosis membranes
, installed inside blue color high-pressure housing. Their job is to sepa-
rate the intake high-pressure seawater into two flows: one for the salt-water drain and one for the
fresh water production.
Energy Recovery System
. It has the function to amplify the pressure supplied by the pumps and to
recoup the hydraulic energy back from the membranes. The ERS device makes periodic cycling by a
hydraulically controlled automatic valve. The cycles are noticeable through a ”beat” issued periodi-
cally by the watermaker unit. The unit is constituted of 2 cylinders, and a central body containing the
hydraulic valve necessary for the system functioning.
Manometer
. It is located on the front panel, and it measures the pumps running pressure.
Flowmeter
. It is located on the front panel, and it measures the fresh water instantaneous capacity
sent to the tank. The device accuracy is +/- 20%.
Pulsation dimmer
. It is constituted of a cylindrical recipient and has the function to dampen the
pumps pressure oscillations during the watermaker functioning. The dimmer needs to be pre-charged
of air through the apposite valve (similar to the common tire valves) located on the left of the device.
The air pressure shall be of 6,5 Bar. The pressure dimmer is charged in factory at the right pressure,
but it is opportune to verify the pressure level at the first start-up.
