OceanSphereENGINES

20VW34SG

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

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍​‌​​⁠​⁠⁠‌‍⁠‍‌‌​​
7,900 kWPower
20Cylinders
340 mmBore
400 mmStroke
12971Dimensions

The Wärtsilä 20VW34SG is a V‑type, 20‑cylinder, spark‑ignited LNG marine engine delivering up to 7.9 MW at 720 rpm, designed for low‑emission main propulsion.

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
Dimensions12971 mm🔖
Power (kW)7900
Speed (rpm)720
Fuel TypeLNG (Spark-Ignited)
ConfigurationV
📄
Download datasheet (PDF) (125 KB)
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