THE PRESENT MANUAL BELONGS TO - Schenker Italia - ALL RIGHTS RESERVED
16
CONCENTRATE OUTLET (OUT) AND SEAWATER INLET (IN)
FIG. 3-8
The watermaker group is composed by the following components:
• Reverse osmosis membranes
• Energy Recovery System
• Manometer
• Depressurization valve
• Positioner
• Reset valve
• Probe (pressure switch)
• Electric box
Reverse osmosis membrane, it is installed inside the glass fibre high-pressure housing. Membrane is n.1 x
SW2521 type. Its purpose is to separate the intake high-pressure seawater in two flows: one for the salt-water
drain and one for the fresh water production.
Energy Recovery System It is the black, carbon fibre unit. 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
periodically by the watermaker unit. The unit is based on cylinders and a central body containing the hydraulic
valve necessary for the system functioning.
Manometers. It is located on the front panel of the watermaker, and it measures the working pressure of the
watermaker.
Pulsation dampener is a black plastic cylinder, installed in the pump group. Its function is to reduce and
stabilize the pressure peaks during the watermaker functioning. The device has to be pre-charged with air
through the specific valve. The air pressure precharge is about 4 Bar. The pressure dimmer is charged in
factory at the right pressure.
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