BLUECUBE MODULAR REVERSE OSMOSIS WATERMAKERS

Compact RO modules for in-service vessel retrofits—fit tight spaces, confirm class/flag expectations, and get back underway.
Bluecube RO delivers modular SWRO packages sized for machinery-space realities and short yard windows. Documentation is informational (not EPC-style) yet confirms class/flag requirements—so owners and shipyards move forward with confidence.
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Your Vessel Can’t Afford Delays and Redlines

Marine teams face the same villains: tight spaces, brief install windows, and paperwork that still must satisfy class/flag.

When documentation bounces or a unit won’t fit, the schedule slips and revenue stalls. Bluecube RO arrives as modular sections sized for access, with a document pack that confirms compliance expectations and keeps inspections calm.

  • Built for retrofits and short yard periods—drop-in modules, simple tie-ins.

  • Informational submittals that address class/flag requirements without EPC churn.

  • Owners, port/marine engineers, and shipyard teams get the early integration data they need. 

Trusted on Workboats and Small to Mid-Tonnage Vessels

Commercial Marine programs need compact, predictable packages. H2O supports in-service fleets with right-sized RO modules and docs that reduce open items—so vessels pass review, install cleanly, and return to service on time.

Our track record is simple: Tight-fit installs. Calm inspections. On-schedule turnarounds.

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Meet BlueCube RO — The Marine Retrofit Watermaker

Modular. Class/flag-aware. Built for tight machinery spaces.

Bluecube RO solves the realities of in-service vessels: access limits, brief windows, and documentation scrutiny. Modules pass through hatches and stairwells, match existing utilities, and ship with the confirmations builders/owners expect.

BLUECUBE WATERMAKER

Engineered for Marine Reality

  • Modular, Tight-Access Layout
    Sections sized for machinery spaces; clean routes through hatches and stairs.
  • Class/Flag Confirmation Pack
    Informational documents that address ABS/DNV/flag expectations for acceptance.
  • Early Integration Data
    GA, utilities list (electrical/cooling), weights & CoG, lifting/foundation notes—shared early to plan installation.
  • Simple Tie-Ins & Startup
    Connections aligned to existing utilities; straightforward commissioning for crews.
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A Simple Path to a Clean Retrofit

1. Share Vessel Constraints
Send envelope, utilities, and class/flag expectations.
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2. Receive a Retrofit Plan
We return a layout and document list tailored to your install window.
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3. Install & Commission
Drop-in modules, quick tie-ins, onboard start-up support.
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The Cost of Doing Nothing Adds Up Fast

When fit and paperwork aren’t handled early, yards extend and inspections drag:

  • Rework for access and connections

  • Last-minute document clarifications

  • Extra days in port or drydock

Choose a retrofit package designed to fit first time and satisfy class/flag expectations.

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With BlueCube RO, Marine Programs Run Smoother

  • Owners get predictable scope and calm inspections
  • Port/Marine Engineers keep the timeline intact
  • Shipyard teams receive the data to install cleanly

That’s what predictable vessel delivery feels like.

Specification Overview

BLUECUBE WATERMAKER
  • Capacity Range: 5–130 m³/day (1,370–34,300 gallons/day)
  • Pretreatment: Oversized pleated prefilters (10x service life vs. standard), optional bag and media filters for silt-heavy or shallow intakes
  • Membranes: Siltbuster™ low-fouling membranes with 20% larger feed spacer; 1,200 PSI side-ported fiberglass membranes with duplex connections
  • Piping & Hardware: Duplex stainless axial pump, duplex HP piping, 316L SS hardware, epoxy-coated steel frames
  • Monitoring & Control: Continuous salinity monitoring with auto dump, system health indicators (red/yellow/green gauges)
  • Recovery Rate: <40% typical for seawater range 32,000–45,000 ppm TDS
  • Utilities: 208–480V 3ph/50 or 60Hz

Options & Upgrades

INLET OPTIONS

BlueCube inlet configurations ensure stable RO feed conditions even when platform seawater pressure is inconsistent. A boost pump is available in either 1x100% or 2x100% duty to support low-pressure sources such as seachests. A pressure control valve can also be added to regulate variable feed pressures and maintain a consistent inlet supply to the RO system.

CHLORINE REMOVAL OPTIONS

For locations with chlorinated seawater supply BlueCube systems remove chlorine using one of two methods. A carbon contactor provides physical adsorption, or chemical injection (SBS) neutralizes free chlorine through chemical reduction.

PREFILTRATION UPGRADES

For locations with higher suspended solids or seasonal turbidity, BlueCube offers enhanced pretreatment. A basic media filter improves upstream solids removal, an automated media filter adds automatic backwash functionality, and a bag filter provides a compact, serviceable option for moderate TSS levels.

CONTROLS AND INSTRUMENTATION

BlueCube systems can be tailored to the platform’s automation needs. Basic controls provide essential instrumentation and protection logic, while advanced controls add an HMI, transmitters, and DCS integration. Both options are available in safe area or HazLoc configurations.
PRESSURE SAFETY OPTIONS
Pressure protection can be supplied to different standards. The basic pressure safety package includes relief valves and vacuum breakers across key lines, while the API pressure safety package provides upgraded components for facilities requiring API-level compliance.
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POTABLE WATER OPTIONS
To meet potable water requirements, BlueCube offers multiple post-treatment configurations. The basic potable water package includes pH neutralization, corrosion control and disinfection, while the advanced potable water package adds enhanced monitoring and record keeping.
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MEMBRANE CLEANING
BlueCube supports long-term RO performance with two cleaning configurations. A manual CIP system enables operator-performed membrane cleaning, while a fully automated CIP system cleans without manual intervention.
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CERTIFICATION OPTIONS
Packages can be delivered with a range of optional certifications. ABS, DNV, and Lloyd’s approvals are available for classification society requirements. Hazardous area certifications include Class I Div 2, CSA Zone 2, and IECEx Zone 2.
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COMPLIANCE

  • Class/Flag: ABS/DNV/flag confirmation (informational) for acceptance by builders/owners

  • Documentation: GA, utilities, weights/CoG, lifting/foundation details shared early to plan install

  • Evidence: Certificates and statements included as required by the vessel program

Frequently Asked Questions

Is this an EPC approval process?
No—commercial marine new builds and retrofits typically use informational documentation, while confirming class/flag expectations.
Will it fit our machinery space?
Yes—modules are sized for tight access and existing utility tie-ins. Share photos or a GA and we’ll map the route.
How do you protect the schedule?
We provide early integration data and a clean retrofit plan so shipyards can route, mount, and connect without rework.
How long does installation take offshore?
Most modular replacements are installed and producing water within a single shift once tie-in utilities are prepped. The hatchable design avoids multi-day crane operations and minimizes downtime. 
Can rotating crews operate it without special training?
Yes. Controls are simplified for rotating crews. Each install includes onboard familiarization plus 24/7 access to digital training resources and videos through our 360Support portal. 
What’s the expected service life?
Bluecube modules are engineered for 20+ years of offshore duty when maintained per the O&M manual. Corrosion-resistant materials and coatings are specified to meet harsh marine conditions.

Get RO Capacity Without Slipping the Schedule

Serving offshore operators for over 45 years. Proven in the Gulf of Mexico and worldwide.