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What ship operators should specify for an RO intake
Define intake conditions, pretreatment and shutdown logic for a shipboard seawater reverse osmosis system.
HOSON WATER editorial ·
Describe the water the skid will actually receive
Open-water and port operation can give the same vessel very different feed conditions. Describe where the intake sits, when the vessel can operate the watermaker, and whether the intake has experienced sand, algae, oil, aeration or pressure fluctuations. Supply normal and adverse sample results with temperature and salinity. A single fair-weather sample leaves the design team guessing about protection and run hours.
Trace pretreatment through the high-pressure pump
Ask the skid vendor to identify the battery limit at the intake, the minimum available feed pressure and each included pretreatment stage. Define how operators will detect a blocked filter, obtain replacement cartridges and flush the system after stopping. Where oxidants are used, specify residual monitoring and compatibility with the selected RO membrane. Record where sample valves and drain points must remain accessible.
Agree on when production stops
Include shutdown and restart conditions for inadequate intake pressure and out-of-spec permeate. Define which alarm can be acknowledged locally, which faults inhibit automatic restart, and where off-spec water is routed. A factory test can exercise logic with simulated inputs. An on-vessel test should verify the actual pipe connections, flows and water-quality signals.