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Library› Cargo› Ballast Water Treatment Systems› UV-Based BWMS› RWO CleanBallast - Ocean Barrier System (models: CB-OBS-051D / CB-OBS-101D / CB-OBS-102D / CB-OBS-151D / CB-OBS-201D / CB-OBS-251D / CB-OBS-301D)
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CleanBallast - Ocean Barrier System (models: CB-OBS-051D / CB-OBS-101D / CB-OBS-102D / CB-OBS-151D / CB-OBS-201D / CB-OBS-251D / CB-OBS-301D)

UV-Based BWMS · Ballast Water Treatment Systems

Class-certified type (DNV register) · technical data sheet not yet verified​​⁠‍​​⁠​‌‌⁠⁠⁠​⁠‍‌‌‌​

CleanBallast - Ocean Barrier System (models: CB-OBS-051D / CB-OBS-101D / CB-OBS-102D / CB-OBS-151D / CB-OBS-201D / CB-OBS-251D / CB-OBS-301D) by RWO GmbH. DNV TA certificate TAP00002F6.

Inspection

Inspector Detail

Common issues

  • Filter screen/element clogging or fouling reducing treatment flow rate
  • UV lamp output decay over service life reducing disinfection dose below the required set-point
  • Quartz sleeve fouling (biofilm, scaling) lowering UV transmittance to the water
  • Low water UV transmittance in turbid/coastal water causing under-dosing alarms and reduced ballast rate
  • Sensor (UV intensity, turbidity, flow) drift or fouling causing false alarms or masking real under-dosing
  • Backwash/valve actuator failures preventing automatic filter cleaning cycles
  • Control system/PLC faults interrupting automatic sequencing between filtration and UV stages

Inspection checklist

  • Verify current BWMS type approval certificate is on board and matches the installed model
  • Check filter backwash cycle triggers and completes correctly, inspect screen condition when accessible
  • Check UV lamp intensity/hours against the maker's replacement threshold
  • Inspect and clean quartz sleeves per maker's schedule, check for cracking
  • Verify UV intensity, turbidity and flow sensors are within calibration date
  • Review the Ballast Water Record Book for missed treatment cycles or logged alarms
  • Test alarm functions (low UV dose, filter fault, sensor fault) from the control panel
  • Check electrical enclosures and cable glands in the treatment room for moisture ingress

Service intervals

UV lamp replacementper maker's rated lamp life, typically in the low thousands of operating hours - confirm against the specific lamp fitted
Quartz sleeve cleaning/inspectionper maker's PMS, commonly every few months depending on water quality
Filter screen inspectionper maker's PMS, typically every 6-12 months or on backwash performance trend
Sensor calibration (UV, turbidity, flow)annually or per maker's manual
Type approval / survey documentation reviewat each annual and renewal survey

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Critical spares

  • UV lamps matching the installed unit's rating
  • Quartz sleeves and associated seals/O-rings
  • Filter screens/discs of the correct mesh size
  • Sensor probes (UV intensity, turbidity) as spares
  • Actuator/valve seal kits for the backwash system
  • Control system fuses and I/O card spares where held

Safety

  • UV radiation exposure if lamp housings are opened without lockout - direct exposure can injure eyes/skin
  • Electrical hazards in the treatment room, particularly around lamp ballasts/drivers
  • Pressurised pipework - isolate and depressurise before opening filter housings
  • Confined-space considerations if accessing tank-mounted sensors

Class survey

Note: the order data tags this unit as 'Steering Gear' - that does not match the product. RWO CleanBallast / Ocean Barrier System is a ballast water management system (filtration plus UV disinfection), not a rudder actuator; the content above covers the actual BWMS. Class checks the BWMS type approval certificate, Ballast Water Record Book entries and commissioning test records at survey; treatment performance is not directly re-tested at each survey but documentation gaps are a common finding.

Classification

DNV type approval

Listed in the DNV Approval Finder at the time we recorded it. The certificate is issued by DNV, not by us; check its current status at DNV.

CertificateTAP00002F6
Open the certificate at DNV
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