MAN NR/S.
The final NR series for MAN four-stroke engines, succeeded by the TCR in 2004. Many NR/S units remain in service; three sizes face a 2026 spare-parts production phase-out.
- Turbine
- Radial-flowPressure ratio up to 4.5
- Engine output
- 670–5,400 kWper turbocharger, approx.
- Engines
- Four-strokeL16/24, L21/31, L27/38, L32/40
- Status
- Phase-out 2026NR12/S, NR17/S, NR20/S
MAN NR/S sizes.
Click on a turbocharger type to ask about it. Not listed? Ask us anyway.
| Type | Max. speedrpm | Weightkg | Enginestypical pairings |
|---|---|---|---|
| NR12/S (phase-out) | 75,000 | 155 | L16/24 |
| NR14/S | 64,000 | 190 | L16/24 |
| NR17/S (phase-out) | 52,600 | 260 | 5–6L21/31 |
| NR20/S (phase-out) | 44,700 | 350 | 5–8L27/38, L21/31 |
| NR24/S | 37,300 | 505 | 7–8L27/38, 9L28/32H |
| NR29/S | 31,300 | 780 | 6–7L32/40, 12V32/40, 9L27/38 |
| NR34/S | 26,300 | 1,450 | 8L32/40, 18V32/40 |
Phase-out applies to NR12/S, NR17/S and NR20/S only: Everllence (MAN) stopsstopped making spare parts for these types on 31 December 2026. Max. speed and weight per size, for reference: the permitted speed of each unit is on its nameplate. Brand names are used for identification only.
Three NR/S types. One deadline.
Everllence (MAN) stops making spare parts for the NR12/S, NR17/S and NR20/S on 31 December 2026.Everllence (MAN) stopped making spare parts for the NR12/S, NR17/S and NR20/S on 31 December 2026. A unit in good condition doesn't automatically need a retrofit, and we expect to keep supplying OEM parts for these types.
Read the full article →Inside the NR/S.
- Radial-flow turbine
- Bearings inside the casing on engine oil: thrust bearing and floating bush on the compressor side, floating bush on the turbine side; bearing life over 25,000 hours
- Water-free design: no cooling water connections
- Runs on heavy fuel oil up to IF-700, marine diesel and gas
- Pressure ratio up to 4.5; gas inlet temperature up to 650 °C (720 °C optional)
What we do for the MAN NR/S
- InspectionsWe assess the condition of the unit and its components, and tell you what needs attention and what can wait.
- OverhaulsPlanned overhauls with OEM parts, with a clear record of the work.
- TroubleshootingLoss of performance, vibration, high temperatures: we help find the cause and the right fix.
- Spare partsOEM spare parts, supplied through the Engine Partners Group.
We don't attend on board ourselves; for work on board we arrange partners we trust.
Engine parts too.
Our engine parts team, Engine Partners, supplies OEM spare parts for the engines these turbochargers run on.
Ask the specialists.
Send us the type and serial number from the nameplate, preferably with a photo. You'll have our answer within a working day.
- Phone
- +31 181 650 040
- ShipServ
- Turbo Partners · ID 241045
- Address
- Ohmweg 22, 3208 KE Spijkenisse
Rotterdam area, the Netherlands