DesFuel goes to sea
DESMI’s DesFuel deepwell pump — designed for LNG, ammonia, methanol and LPG — is finished and on its way on board an LNG-fuelled ferry for its first installation in service.
DesFuel at a glance
| Item | Details |
|---|---|
| Product | DESMI DesFuel Deepwell Pump (RSL) |
| Fuels | LNG, ammonia, methanol/ethanol and LPG — without modification, according to DESMI |
| Design | Motor, coupling and bearings outside the tank · sealed magnetic coupling · air-cooled motor and oil-lubricated bearing, so no fuel filters |
| Service | Pump and drive shaft can be pulled from a caisson for repair without gas-freeing the tank |
| Sizes | Five sizes, RSL 20 to RSL 50 · 0.5–80 m³/h |
| First installation | An LNG-fuelled ferry |
| Finalised by | DESMI together with Nordan Marine A/S |
| Source | desmi.com — DesFuel Deepwell Pump (RSL) → |
From the workshop to the vessel
DESMI’s DesFuel pump is leaving the workshop. The Danish pump maker reports that its new deepwell fuel pump is finalised and ready to go on board an LNG-fuelled ferry — the first chance to prove the DesFuel concept in real vessel operation.
Claus Linding Olesen, Senior Mechanical Engineer at DESMI, has completed the pump together with a colleague from Nordan Marine A/S and is now taking the equipment on board for installation. Having followed DesFuel from the very beginning, he calls seeing the pump ready to go on board “a great feeling”.
According to DESMI, testing has shown very promising NPSHr performance, with a lower NPSHr than competing solutions. In practice, a low NPSHr gives the crew more freedom to draw the fuel tank further down while the pump keeps running reliably.
DesFuel was introduced in 2025 as a deepwell pump built for fuel flexibility. The motor, coupling and bearings sit outside the tank, a sealed magnetic coupling handles the hazardous fuel, and the pump and shaft can be removed from a caisson for service — without emptying or gas-freeing the tank.
Arne Nielsen A/S is a DESMI dealer. For DESMI pumps and spare parts on board, see our DESMI page or send us the nameplate below.
Three reasons to watch DesFuel
DESMI pumps and spare parts for vessels: see our DESMI page or browse G · Pumps, motors & rotating equipment.
DESMI RFQ
Running DESMI pumps on board? Drop your RFQ, nameplate photo or parts list below and add your email. Pump type, size and serial number from the DESMI nameplate help us match it. We reply with a matched quote within one working day.
Thank you for your response. ✨
Need DESMI pumps or spare parts on board?
Send us the nameplate — we’ll come back with a match and a quote.
Send RFQ →CVR 21697486 · EORI DK21697486 · NCAGE R4955
📞 Telephone +45 56 21 50 50 · info@arnenielsen.com
📱 SMS & WhatsApp +45 53 86 00 00
