The watermaker group is composed of the following parts:
• Reverse osmosis membranes
• Energy Recovery System
• Manometer
• Accumulator
• Depressurization valve
• Positioner
• Reset valve
• Antishock
Reverse osmosis membrane. it is installed inside the carbon 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. The heart of the system. Its main function is to amplify the pressure supplied by
the pumps and to recover 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” emitted by the
watermaker unit. The unit is based on cylinders and a central body containing the hydraulic valve necessary
for the system to function.
Manometer. Located on the right side of the watermaker, it measures the working pressure of the watermaker.
Accumulator. This is an air accumulator installed after the cartridge filter group. Its function is to reduce and
stabilize the pressure peaks during the functioning of the watermaker. The device has to be pre-charged with
air through the Schrader valve. The pressure is about 4 Bar. The accumulator is already pre-charged to the
correct pressure.
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