gas ship engine / dual-fuel / heavy fuel oil / Tier 3
RT-FLEX50DF Wärtsilä Corporation



  • Power source:

    gas, dual-fuel, heavy fuel oil

  • Other characteristics:

    Tier 3

  • Power:

    Min.: 4,775 kW (6,492.2 hp)

    Max.: 11,520 kW (15,662.8 hp)


Designed for LNG carriers, Handysize tankers and bulk carriers, as well as feeder container vessel.

The lowest emissions that meet Tier III without additional exhaust after-treatment.

Applying the DF industry’s standard with simple, reliable and most economical low-pressure gas supply system, with the fewest components.

Stable operation on gas over the entire load for port-to-port operation and manoeuvring.

Wärtsilä and China State Shipbuilding Corporation (CSSC) have established the company “Winterthur Gas & Diesel Ltd. “ which takes over Wärtsilä’s 2-stroke engine business.