Engineering reliability into marine boiler systems – decades of insight behind every drop

In marine boiler systems, performance is never defined by a single component. It is the result of how well every element works together under pressure—literally.

At DESMI, we have spent decades refining one critical part of that equation: how water flows through high-temperature, high-pressure boiler systems. Not just supplying pumps, but continuously improving how they perform in real operating conditions. Because in this application, efficiency is not enough. Reliability is everything.

Understanding the real demands behind boiler feed systems

Marine boiler feed water systems operate in one of the most demanding environments on board. High pressures, elevated temperatures, and continuous operation place extreme stress on both components and system design. This is where experience matters.

Our approach is built on deep hydraulic knowledge, advanced simulation tools, and continuous feedback from vessels in operation. The result is not just optimised pump performance—but balanced systems that reduce wear, minimise energy consumption, and extend service intervals.

To support reliable operation in demanding marine environments, DESMI boiler pump solutions are developed with focus on durability, flexibility, and lifecycle efficiency:

• Robust wet-end materials, including ductile cast iron and cast stainless-steel alloys, ensure reliable performance and long service life under demanding boiler water conditions.
• Products are designed, assembled, and tested specifically for marine boiler applications in accordance with marine class requirements and witness inspection programmes.
• A modular standardisation philosophy enables spare parts sharing across multiple engine room pump applications, helping reduce onboard spare part inventory and overall operational costs.
• Both vertical and horizontal installation configurations are available, enabling flexible integration into engine room layouts where space optimisation is critical.

Designed around application – not just specifications

Every DESMI boiler pump solution is engineered with the application in mind.

For high-pressure feed systems, multistage centrifugal pumps are designed to handle demanding discharge pressures while maintaining compact footprints and stable operation. Hydraulic optimisation across stages ensures high efficiency while keeping NPSH requirements low—critical for safe and reliable operation at sea.

For medium-pressure applications, simplified two-stage designs strike a careful balance between performance and cost efficiency. By reducing mechanical stress and optimising internal flow paths, these pumps ensure steady operation and long component lifetime.

And for circulation systems, where temperature becomes the defining factor, specialised high-temperature pump designs protect critical components from thermal stress while maintaining consistent flow. Across all variants, the principle remains the same: design follows real operating conditions—not theoretical performance curves.

For more information visit: desmi.com

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