EPA Tier III for Wärtsilä dual-fuel engine

The A 6-cylinder Wärtsilä 34DF dual-fuel engine Photo: Wärtsilä The A 6-cylinder Wärtsilä 34DF dual-fuel engine Photo: Wärtsilä
Industry Database

Wärtsilä’s 34DF dual-fuel engine has been awarded the US EPA Tier III certification for diesel mode operation when installed together with the Wärtsilä NOx Reducer (NOR) system.

The benefit of this award is that shipyards now need only a single party to certify both the engine and the SCR system for full compliance with the latest emission regulations.

“This is a very meaningful achievement since it allows operators complete fuel flexibility when sailing in NOx emission control areas. It represents further validation of Wärtsilä’s technological leadership in working towards a cleaner shipping industry,” said Stefan Wiik, vice president, Marine Power Solutions, Wärtsilä Marine Solutions.

Fully certified

Wärtsilä’s 34DF engine is now certified for both the EPA Tier III and the IMO Tier III emission standards in diesel mode operation when installed together with the Wärtsilä NOx Reducer SCR system, as well as in gas mode without exhaust after-treatment.

The 34DF engine features advanced dual-fuel technology and high efficiency. For marine applications, it is manufactured in configurations from 6 to 16 cylinders covering a power range of 2880 – 8000kW.

Based on the well proven and reliable Wärtsilä 32 diesel engine introduced in the mid-1990s, the Wärtsilä 34DF’s fuel flexibility means that the engine can be optimised for constant speed generating sets, as well as variable speed mechanical drives for main engine applications.

The Wärtsilä 34DF has already been awarded EPA Tier III certification of emissions compliance from the EPA in 2017 for operating in gas mode without an SCR system.

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