The Niigata diesel generator is a highly reliable and efficient power solution widely used across marine, industrial, and commercial sectors. Known for its robust performance, it serves as a primary or backup power source for applications such as offshore support vessels, tugboats, and land-based power plants. With models like the 6L28AHX and 12V28AHX, Niigata generators deliver outputs ranging from 441 kW to 6,300 kW, catering to diverse energy demands. These generators are designed for low fuel consumption and compliance with IMO Tier II emissions standards, making them environmentally friendly. Their durability and ease of maintenance, facilitated by features like integrated cylinder units and advanced gauge boards (“Grafico”), ensure long-term operational efficiency.
Niigata diesel generators stand out for their advanced engineering and versatility. The AHX series, for instance, incorporates Miller cycle technology and Variable Intake Valve Timing (VIVT) to optimize fuel efficiency and reduce emissions. These generators support dual-fuel capabilities (e.g., 28AHX-DF model), allowing seamless switching between diesel and natural gas to meet stringent environmental regulations like IMO Tier III. Additionally, Niigata offers hybrid propulsion systems for marine applications, combining diesel engines with electric motors to enhance fuel savings and reduce emissions. With a global service network and ISO-certified manufacturing, Niigata generators are trusted for their reliability, low operating costs, and adaptability to both marine and land-based power needs.| Parameter | Diesel Generator Sets (6L–18V Models) |
Remarks |
|---|---|---|
| Models | 6NSD-G, 6L19HX, 6L22HX, 6L25HX, 6L26HLX, 6L28HX, 6L28AHX, 8L28AHX, 9L28AHX, 12V28AHX, 16V28AHX, 18V28AHX | Configurations: Inline 6–18 cylinders; V-engines for high-capacity models. |
| Bore × Stroke (mm) | 160×210 – 280×390 | Larger bore = higher power output. |
| Displacement (L/cyl) | 4.2L–24.0L | 18V28AHX: Largest displacement. |
| Dry Weight (tons) | 2.9–50.0 | 18V28AHX: Heaviest (50 tons). |
| Compression Ratio | 16:1 | Optimized for Marine Diesel Oil (ISO 8217) or Gas Oil. |
| Aspiration | Turbocharged | High-efficiency turbocharging for consistent power. |
| Parameter | Diesel Generator Sets | Remarks |
|---|---|---|
| Max Power (kW/PS) | 441–6,300 kW / 600–8,566 PS (50Hz & 60Hz) | 18V28AHX: Highest power (6,300 kW). |
| RPM Range | 720–1,650 RPM | Standard 720 RPM for 50Hz; 750/900 RPM for 60Hz applications. |
| Fuel Consumption | 195–210 g/kWh | Competitive for marine and industrial use. |
| Voltage/Frequency | 400V–6.6kV, 50Hz/60Hz | Configurable for low/high voltage needs. |
| Emissions Compliance | Tier II (SCR-ready for Tier III) | Meets IMO NOx regulations; dual-fuel options available (e.g., 28AHX-DF). |
| Parameter | Diesel Generator Sets | Remarks |
|---|---|---|
| Cylinder Block | Monoblock nodular cast iron | Integrated cooling/lubrication pipes; high rigidity. |
| Fuel System | NIP (Niigata Injection Pump) mechanical system | High-pressure injection (up to 160MPa) for reliability. |
| Cooling System | Jacket water + air | Air cooler mounted directly on block; optional central cooling. |
| Control Panel | “Grafico” digital display | Real-time monitoring of engine/generator metrics. |
| Mounting | Common base frame (standard) or separate mounting (large units) | Flexible installation for tight engine rooms. |
| Parameter | Diesel Generator Sets | Remarks |
|---|---|---|
| Overhaul Interval | 8,000–10,000 hours | Dependable for continuous operation. |
| Key Wear Parts | Replaceable cylinder liners, pistons, bearings | Simplified maintenance with integrated cylinder units. |
| Lube Oil Interval | 700 hours | Standard marine maintenance cycle. |
| Parameter | Diesel Generator Sets | Remarks |
|---|---|---|
| Primary Use Cases |
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| Redundancy | Optional PTO (Power Take-Off) for auxiliary drives/shaft generators | Ensures operational reliability. |
| Noise/Vibration | Moderate (dampened mounts) | Balanced for crew comfort in marine environments. |
With over 3 decades of industry experience, Neptunus is a trusted service provider for diesel generators, offering expert repair, maintenance, and overhaul solutions. Our in-depth knowledge, developed over decades, allows us to provide comprehensive services designed to enhance the reliability and efficiency of your diesel generator systems, minimizing downtime and ensuring consistent performance.
We also supply a full range of genuine diesel generator parts, each carefully sourced to meet the highest industry standards for quality, performance, and compliance. Neptunus is committed to delivering exceptional service and technical accuracy, helping marine and industrial clients maintain optimal generator performance and ensure long-term operational sustainability.Fill in Details for a Quote
Neptunus Power Plant Services Pvt. Ltd.
India
Neptunus Main Office
A 554/555, TTC Industrial Area,
MIDC Mahape, Navi Mumbai,
Maharashtra 400710, India.
UAE
Neptunus Global Trading (NGT)
Ras Al Khaimah Economic Zone,
RAKEZ Al Mamourah Street,
Ras Al-Khaimah, UAE.
France
dataVIB Impédance
80 Dom. de Montvoisin,
91400 Gometz-la-Ville,
France.
