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12VW34DF

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

Class-certified type (DNV register) · technical data sheet not yet verified
4,680 kWPower
12Cylinders
340 mmBore
400 mmStroke
{'length_a_12v34df': 10454, 'length_b_12v34df': 3350, 'height_c_12v34df': 4374, 'length_a_16v34df': 11606, 'length_b_16v34df': 3420, 'height_c_16v34df': 4374, 'length_a_20v34df': 12971, 'length_b_20v3Dimensions

Crew members and engineers aboard ships rely on reliable power generation systems to ensure smooth operations. Wärtsilä's 12VW34DF model, designed for versatile applications, offers dependable performance. This diesel engine is compact yet robust, measuring 10,454 millimeters in length with a height of 4,374 millimeters and weighing approximately 99 tonnes when dry. While the 16-cylinder version stands at 11,606 millimeters in length, it too remains within similar dimensions. The 20-cylinder variant, though larger, retains comparable proportions, measuring 12,971 millimeters long and still standing at 4,374 millimeters tall. These engines provide the critical power needed for navigation, maintaining vital shipboard systems, ensuring safety and efficiency across various maritime operations.

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
Dimensions{'length_a_12v34df': 10454, 'length_b_12v34df': 3350, 'height_c_12v34df': 4374, 'length_a_16v34df': 11606, 'length_b_16v34df': 3420, 'height_c_16v34df': 4374, 'length_a_20v34df': 12971, 'length_b_20v3 mm🔖
Weight (kg){'dry_weight_12v34df': 99, 'dry_weight_16v34df': 130, 'dry_weight_20v34df': 141} tonnes🔖
Power (kW)4680
Speed (rpm)720
Fuel TypeLNG/HFO (Dual-Fuel)
ConfigurationV
📄
Download datasheet (PDF) (125 KB)
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