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10LW34DF

Main Engine 4-Stroke · Main Engines (4-Stroke)

Class-certified type (DNV register) · technical data sheet not yet verified
3,900 kWPower
10Cylinders
340 mmBore
400 mmStroke
10454Dimensions

This equipment category includes large marine engines designed for power generation. Wärtsilä's 10LW34DF model is a powerful dual-fuel engine with a nominal output of 3900 kW. It features a bore of 340 mm and a stroke of 400 mm, operating at 720 rpm in a four-stroke configuration. Capable of running on LNG or heavy fuel oil (HFO), the engine offers robust performance suitable for various maritime applications. Known common failures include turbocharger bearing issues, fuel injector carbon deposits, gas valve unit malfunctions, and cylinder liner scuffing due to insufficient lubrication. Regular maintenance is crucial to ensure reliable operation and longevity of this advanced marine power solution.

Specifications

Technical data.from datasheet

Every value below comes from the manufacturer datasheet or class-society record on file for this model.

Power per cylinder (main engine 34DF)500 kW @ 750 rpm
Power per cylinder (auxiliary 34DF)520 kW @ 720-750 rpm
Mean effective pressure (main)20.0-19.8 bar
Piston speed9.6-10.0 m/s
Compression ratio (16V/20V)12.6:1
Engine type4-stroke, turbocharged intercooled non-reversible
Swept volume per cylinder36.3 dm³
34DF Max output (16V main)8000 kW
34DF/34SG Max output (20V genset)9800 kW
34SG designSpark-ignited, lean-burn, pre-chamber
20V34SG dimensionsL:12.7m × W:3.3m × H:4.65m
20V34SG weight131,500 kg
Dimensions10454 mm🔖
Power (kW)3900
Speed (rpm)720
Fuel TypeLNG/HFO (Dual-Fuel)
ConfigurationL
📄
Download datasheet (PDF) (125 KB)
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