Alfa Laval PureSOx-U-70-Open
Alfa Laval PureSOx-U-70-Open exhaust gas cleaning system / scrubber (U-design scrubber, 70 MW; open-loop scrubber, seawater alkalinity). Engine power rating 70 MW, throat diameter 1600 mm, scrubbing water flow 1300 m3/h, weight ~105 t. Open-loop, closed-loop, and hybrid configurations available for SOx compliance with IMO MARPOL Annex VI.
Components & Design
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Technical Data
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Common failures & inspection points
Visual: Check optical cell for fouling; Function test via high-oil simulation (monthly); Calibration by authorized manufacturer agent every 12 months or before IOPP renewal survey (MEPC.107(49) § 4.2.11 requirement)
Routine inspection: Weekly check filter/coalescer elements for wear, clogging or damage; Replace upon blockage or visible wear (planned maintenance). Internal inspection: Clear separator chamber and inspect coalescer inserts for aging
Daily: Check all valve positions; Monthly: Test three-way valve under simulated high-oil condition to confirm diversion to slop tank; Check for leakage at flange connections; Actuation without delay or abnormal noise
Weekly: Check all sensors (temperature, pressure, speed) for functionality; Monthly: Check data logging device and review log data; Quarterly: Test all alarms and sensor outputs (document with protocol); Annually: Verify sensor calibration
Daily: Visually inspect all pipes and valve connections for oil film, droplet formation or corrosion (especially hot water/drain areas); Weekly: Check flanges for reduction in clamping force or leakage under load; Immediately repair if signs of corrosion or leakage appear
Daily: Check outlet temperature of preheated bilge water (typical: 50-70°C, manufacturer-specific); Weekly: Inspect heating element surface for deposits, wear or charring; Monthly: Calibrate thermostats and temperature sensors; If setpoint temperature is not reached, check thermocouple or controller
Type-general inspection and maintenance points for this equipment category — not model-specific.
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