MAN B&W L58/64 Diesel Engine Generator Set | Reliable Marine Power Solutions
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MAN B&W L58/64 Diesel Engine Generator Set
The MAN B&W L58/64 diesel engine generator set has a strong 580 mm bore and 640 mm stroke design that makes it reliable for both maritime and stationary use. This turbocharged, four-stroke engine works best with heavy fuel, producing low emissions and good efficiency.
The MAN B&W L58/64 series is a well-known line of in-line, four-stroke diesel engines that work well in tough conditions for generator sets. The generators can have 6L to 9L cylinders and make between 7,860 and 11,790 kW at 400 rpm, with an average effective pressure of 23.2 bar. Built for heavy fuel oil (HFO) with a viscosity of up to 700 cSt at 50°C, it uses just 176 g/kWh of fuel and 0.8 g/kWh of lubricating oil.
Model Details
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Engine type: Inline, 4‑stroke, turbocharged, medium‑speed diesel engine.
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Bore and stroke: 580 mm bore x 640 mm stroke across all L58/64 models.​
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Speed range: Typical rated speed 400–428 rpm depending on configuration.
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Cylinder configurations: 6L58/64, 7L58/64, 8L58/64, and 9L58/64 in-line engines.
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Fuel capability: Designed for heavy fuel oil up to 700 cSt at 50°C, also suitable for MDO.
MAN B&W L58/64 Manual and Datasheet PDF
Technical Specifications: MAN B&W L58/64
| Specification | Value (6L58/64 at 400 rpm) | Value (9L58/64 at 400 rpm) |
|---|---|---|
| Bore x Stroke | 580 mm x 640 mm​ | 580 mm x 640 mm​ |
| Power Output | 7,860 kW​ | 11,790 kW​ |
| Rated Speed | 400 r/min​ | 400 r/min​ |
| Mean Effective Pressure | 23.2 bar​ | 23.2 bar​ |
| Piston Speed | 8.5 m/s​ | 8.5 m/s​ |
| Fuel Consumption (85%) | 176 g/kWh​ | 176 g/kWh​ |
| Lube Oil Consumption | 0.8 g/kWh​ | 0.8 g/kWh​ |
| Length (L) | 9,190 mm​ | 12,600 mm​ |
| Width (W) | 3,550 mm​ | 3,550 mm​ |
| Height (H) | 5,140 mm​ | 5,140 mm​ |
| Dry Weight | 149 t​ | 208 t |
Marine Applications:
- Marine propulsion for cargo ships, transports, and ferries that necessitate dependable medium-speed power.
- Onboard generator sets are utilized to provide auxiliary power on diesel-electric vessels, such as cruise ships.
- In industrial environments, stationary power facilities are utilized for base-load generation or peak shaving.
- HFO-capable, high-output engines are required for offshore platforms and FPSOs.
Performance & Design Characteristics
- Power per cylinder: Approximately 1,390 kW/cyl at 400 rpm, yielding up to 12.6 MW for 9L58/64.
- Mean effective pressure is around 23.2 bar for all variations, ensuring great thermal efficiency.
- Specific fuel consumption at 85% load is around 176 g/kWh, with lubricating oil at 0.8 g/kWh.
- Turbocharging: MAN NA/TCA turbochargers with constant pressure provide reliable air supply and recover waste heat.
- Application focus: Marine generating sets and diesel-electric propulsion with up to 12.6 MW power.
30 DAYS RETURN POLICY
RETURNS ACCEPTED IN 30 DAYS. BUYER PAYS THE SHIPPING CHARGES. RESTOCKING FEES 20%.
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