DESMI
DesFuel Deepwell Pump (RSL)
The world's first marine fuel pump purpose-built for fuel flexibility
The DesFuel Deepwell Pump is purpose-built for alternative fuel flexibility, handling LNG, ammonia, methanol/ethanol, LPG and without modification. With its motor, coupling, and bearings placed outside the tank, it reduces boil off, improves accessibility, and allows service without gas freeing. A sealed magnetic coupling ensures safe handling of hazardous fuels, while the air cooled motor and oil lubricated bearing eliminate the need for fuel filters.
For more details please visit DESMI's website here
Significant benefits
- Essential components are placed outside the fuel tank for easy access, improving reliability, reducing added heat, and making them easily accessible to help minimize maintenance costs.
- Maintenance and repair without gas-freeing, as the pump and drive shaft assembly can be removed, repaired, and reinstalled separately from the fuel tank when caisson and foot valve used.
No need for fuel filters, which eliminates the risk and cost of clogging, significantly improving uptime and efficiency.
Applications
The DesFuel Deepwell Pump is purpose-built to handle alternative fuels
without modification, making it ideally suited for:
- LNG
- Methanol/ethanol
- Ammonia
- LPG
Optimized for low NPSHr, improving usability at lower fuel tank levels
Ready for your vessels, coming in five sizes to suit your vessel, with a wide operating window that minimizes boil-off gas and compatibility with alternative fuels without further modification.
Integrates with your process, with simple installation and broad fuel gas system compatibility, plus global support that includes all documentation, warranties, and aftersales service.Stainless steel AISI 304 or similar for cargo temperatures down to -104° C. Stainless steel AISI 316L for special requirements.


Magnetic Drive Pumps
Sealless pump solutions engineered for hazardous, toxic, and environmentally sensitive liquids - including ammonia and methanol/ethanol
- Sealless design – no leakage risk
- Ideal for hazardous, toxic, and flammable liquids
- Reduced maintenance and lifecycle costs
- Proven performance in marine, industrial, and energy applications
Magnetic drive pump solutions
DESMI offers a broad portfolio of magnetic drive pumps based on different hydraulic principles and installation concepts.
Multiple sizes, configurations, and design options allow pumps to be selected precisely according to system requirements. Read more here

NSL Centrifugal Pump - Magnetically Driven
For duties where leakage can't be accepted - efficient and reliable magnetic coupling.

ESL Centrifugal Pump - Magnetically Driven
Where leaks aren't an option - efficient magnetic drive for compact installtions.

TSL Centrifugal Pump - Magnetically Driven
Low-maintenance, seal-less pumping -efficient magnetic coupling or demanding duties.

ESLH Centrifugal Pump
High-Efficiency Vertical In-line and End-suction Single-stage Centrifugal Pumps
Applications
- Hot water circulation
- Fresh water circulation
- HVAC
- Hydrophore pump
- Cooling water and water, water with additives, seawater and oils up to 500 cSt






