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7LH25/33 DF

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

Class-certified type (DNV register) · technical data sheet not yet verified
1,890 kWPower
7Cylinders
250 mmBore
330 mmStroke

The HiMSEN 7LH25/33 DF is a 7‑cylinder, 4‑stroke trunk piston main propulsion engine offering dual‑fuel operation (LNG and HFO) with a rated output of up to ~2 MW at 720–900 rpm.

Specifications

Technical data.from datasheet

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

Swept volume per cylinder16.2 dm³
Compression ratio17:1
Max combustion pressure200 bar
SFOC (100% MCR)181.0 g/kWh (diesel operation)
Oil consumption0.6 g/kWh
6H25/33 dry weight20.2 metric tons
7H25/33 dry weight22.5 metric tons
8H25/33 dry weight24.1 metric tons
6H25/33M rated output1,440-1,596 kW (depending on RPM)
7H25/33M rated output1,680-1,995 kW (depending on RPM)
8H25/33M rated output2,320 kW at 900 RPM
9H25/33M rated output2,565 kW at 900/1000 RPM; 2,700 kW max
Mean piston speed range7.9-11.0 m/s
Mean effective pressure22.2-27.2 bar (varies by configuration)
Emissions complianceIMO Tier II, Tier III (with SCR - Selective Catalytic Reduction)
Power (kW)1890
Speed (rpm)720
Fuel TypeLNG/HFO (Dual-Fuel)
ConfigurationL
📄
Download datasheet (PDF) (4721 KB)
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