209173 RCD-2
Index A
145
13.5.7 Watermaker
General points
- The watermaker allows fresh water to be produced from the seawater.
- The watermaker can be supplied either:
- by DC (direct current),
- by AC (alternating current).
- A circuit-breaker protects the circuit.
- The watermaker circuit comprises several elements:
- seawater intake,
- seawater filter(s),
- circulation pump,
- electric valve for automated rinsing,
- manual rinsing valve,
- motor block and high-pressure pump,
- membrane block,
- control panel,
- seawater discharge valve.
Operation
- Seawater enters the membrane block under pressure, which allows only pure water to pass out.
- A sensor at the membrane block outlet allows measurement of the salt content of water filtered in this way. A three-way valve allows drinking water to be directed automatically
to the tanks or for water that is too salty to be discharged to the sea.
- The drinking water filtered by the membranes is sterile; it is advisable to treat it with a weak dose of chlorine from time to time and to mineralise it if consumption is prolonged.
- Fresh water production is affected by the temperature of the seawater used and the cleanness of the filter.
Water systems
13
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