The Challenge
An 80K bulk carrier operating in warm-water regions experienced cooling loss on its central cooler.
The unit no longer had sufficient thermal margin, and as seawater temperatures increased, the fresh-water outlet temperature rose beyond safe limits.

The Turning Point
Maritech OceanServ performed a full thermal review and confirmed that the cooling margin was inadequate for the vessel’s current thermal load, which had increased over time (e.g., upgraded generator capacity and higher onboard demand).
• Capacity Upgrade Engineered – To meet the new load, a capacity upgrade was engineered by adding plates while maintaining acceptable pressure drop.
• Full Refurbishment & Commissioning – The cooler was fully refurbished, re-assembled, pressure-tested, and commissioned onboard.

The Result
✅ Cooling efficiency was restored, and the system regained a safe thermal margin even in warm-water conditions.
✅ Performance remained stable.
✅ Service intervals were extended.
✅ The vessel regained operational confidence.

Lessons Learned
Cooling performance issues cannot be resolved by maintenance alone.
When the vessel’s thermal load increases, the cooler’s capacity must be re-engineered to match real operating conditions.
Proper thermal evaluation and targeted upgrades ensure long-term reliability, especially in warm-water environments.

The Challenge
On an Aframax tanker, the fresh-water generator (FWG) was underperforming, forcing the vessel to rely on costly bunkered water and reducing voyage autonomy.
The owner had already ordered replacement parts, but OEM supply-chain delays meant critical components would not arrive in time.
With the vessel under tight charter commitments, downtime or performance loss was not an option — yet continued operation risked efficiency degradation and rising cost.

The Turning Point
Maritech was engaged to restore not only function but performance, identifying and solving the root cause without waiting for delayed spares.
• Performance Assessment – Onboard inspection confirmed reduced production and vacuum instability, pointing to backpressure in the air-brine ejector circuit and heat-transfer imbalance across the plate pack.
• Root Cause Analysis – The air-brine ejector pump showed erosion and excessive wear-ring clearance, reducing suction and vacuum efficiency. Meanwhile, deformed plates and aged gaskets caused internal leakage and loss of sealing integrity — restricting flow, increasing backpressure, and lowering evaporation and condenser efficiency.
• Rapid Parts & Fabrication – Using Maritech’s regional stock and on-demand manufacturing, critical components — including impeller and wear-ring assemblies — were produced and delivered within days. Fully compatible and precision-machined, they replaced delayed items and boosted vacuum and FWG performance.
• On-Site Service – Maritech technicians completed cleaning, plate refurbishment, gasket renewal, and ejector upgrades with improved parts, restoring vacuum stability, correct flow, and full design output.

The Result
✅ Production restored, exceeding pre-incident levels.
✅ Dependence on bunkered water eliminated.
✅ Equipment life extended through refurbishment and selective upgrades.
✅ No off-hire, with warranty-backed assurance.
What began as a supply-chain delay became a performance-recovery success story, driven by Maritech’s technical agility, insight, and integrated logistics.

Lessons Learned
When critical parts aren’t available, agility and root-cause engineering keep vessels operational. By combining diagnostics, regional readiness, and field precision, Maritech turned a supply-chain challenge into a clear operational win.

Strategic Outlook
This case embodies the OCEANSERV® – Preventive Care philosophy: early diagnostics, rapid response, and technical excellence. Beyond repair and supply, Maritech delivers predictable performance, optimized lifecycle cost, and sustainable reliability across shipboard systems worldwide.

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MARITECH OCEANSERV® is a registered trademark of Maritech Group Holding (Hong Kong).

The Challenge
During a vessel drydock at a leading shipyard in Turkey, the condition of the cooler’s plate pack was not identified early enough by the assigned contractor. By the time the failure was confirmed, several plates were already damaged — leaving the vessel off-hire and under significant commercial pressure, with daily off-hire losses reaching tens of thousands of dollars.

The Turning Point
Maritech was called in to address the failure, providing technical service on site and supplying the required plate pack renewal from stock.
• Rapid assessment – Our engineers inspected the unit and confirmed the extent of the failure.
• Refurbishment where possible – Components that could still be used were reconditioned: cleaned, re-gasketed, and realigned.
• Stock-backed renewal – Replacement plates were delivered directly from stock, secured through Maritech’s stock network to ensure immediate availability.
• On-site support – The system was reassembled and tested under Maritech supervision, ensuring reliable performance before the vessel’s departure.

The Result
✅ The vessel was able to return to service within only 48 hours, as Maritech teams worked around the clock to restore full operation and minimize further off-hire costs.
✅ By delivering both technical service and reliable spare parts, Maritech proved its ability to support shipyards in keeping projects on schedule — building trust and helping them strengthen relationships with shipowners while avoiding costly delays.

Lessons Learned
This case highlights how late failure identification can escalate costs rapidly. At the same time, it reflects a broader industry reality: shipyards today demand specialized services that go beyond standard docking — solutions that deliver faster turnarounds, predictable costs, and warranty-backed quality. This is exactly where Maritech provides value.

Strategic Outlook
Building on cases like this, Maritech’s vision is clear: to create a global ecosystem of specialist services that reinforces shipyard capabilities, secures owner confidence, and ensures that every vessel benefits from consistent standards of quality, supply, and warranty — wherever it docks.