SDEC 6KTAA25-G31.1 Diesel Engine (Dual Frequency) is the SDEC 6KTAA25-G31.1 engine, built for continuous duty in generator sets and industrial drives.
The engine is supplied as a complete unit for coupling to an alternator, pump or machine: block, head, injection system, water pump and filters already fitted. The 6KTAA25-G31.1 designation identifies displacement and aspiration layout, so spare parts are ordered by that code rather than by power rating.
Data and compatibility
- Brand
- SDEC
- Model
- 6KTAA25-G31.1
- Frequency
- 50 / 60 Hz (dual frequency)
- Configuration
- 6 cylinders in line
- Aspiration
- Turbocharged with aftercooling
- Origin
- China
Technical Specifications
Typical Generator Capacity (50/60 Hz)
| Model | 50 Hz Prime / Standby (kVA) | 60 Hz Prime / Standby (kVA) | Engine Output 50/60 Hz (kW) |
|---|---|---|---|
| 6KTAA25-G31.1 | / / / | 825 / 900 | / / / | 728 / 800 |
Typical Generator Capacity (50/60 Hz)
| Model | 50 Hz Prime / Standby (kVA) | 60 Hz Prime / Standby (kVA) | Engine Output 50/60 Hz (kW) |
|---|---|---|---|
| SC4H95D2 | 63 / 70 | / / / | 62 / 68 | / / / |
| Parameter | 6KTAA25 (G33-G311) | 6KTAA25 (G31-G321) |
|---|---|---|
| Type | In-Line Type, Water-Cooled, 4-Stroke, Direct Injection, 4 Valves | |
| Aspiration | Turbo & Intercooler | Turbo & Intercooler |
| No. of Cylinders×Bore×Stroke (mm) | 6X170X185 | 6X170X185 |
| Cylinder Liner Type | Wet Liner | Wet Liner |
| Compression Ratio | Single pump 16:1/high pressure common rail 14.5:1 | Single pump 16:1/ high pressure common rail 14.5:1 |
| Displacement (L) | 25.18 | 25.18 |
| Speed Governing Rate (%) | ≤5 | ≤5 |
| Rated Power (kW) | 460-622 | 685-880 |
| Rated Speed (rpm) | 1500-1800 | 1500-1800 |
| Standby Power (kW) | 506-684 | 754-968 |
| 192 | 192 | |
| Exhaust Smoke (FSN) | 0.5 | 0.5 |
| Lube Oil Capacity (L) | 45-75 | 45-75 |
| Cooling System Capacity (L) | 55 | 55 |
| Engine Oil Consumption (g/kW·h) | ≤0.3 | ≤0.3 |
| Emission Standard | Stage III | Stage III |
| Noise (dB-A) | 112 | 112 |
| Net Weight (kg) | 2700 | 2700 |
| Dimensions L×W×H (mm) | 2055x1235x1936(dual air filters) 2352x1181x1659(single air filter) | 2055x1235x1936(dual air filters) 2352x1181x1659(single air filter) 2302x1544x1598(single air filter) |
| Flywheel Housing/Flywheel | SAE0# & 18# | SAE0# & 18# |
Application
- Standby and continuous-duty generator sets.
- Water pump and irrigation drives.
- Construction, mining and material-handling machinery.
- Repowering equipment whose original engine is no longer supported.
Frequently asked questions
How do I know this engine fits my generator set?
The 6KTAA25-G31.1 code must match the plate on the installed engine. If you are building a new set, start from the alternator rating and select the engine by speed and torque curve, not by nameplate kW alone.
Does it ship with documentation?
Yes. Every unit leaves with its datasheet and its 6KTAA25-G31.1 identification code. If your purchase requires a certificate of origin or a conformity certificate, state it in the quotation request so it is issued with the order.
Related products
- Diesel engine SDEC 4Z2.3-G11 (T2)
- Diesel engine SDEC 4Z2.3-G12 (T2)
- SDEC 4Z2.3-G21 (T2) diesel engine
- Diesel engine SDEC 4Z2.7-G11 (T2)
See the full catalogue or request a quotation quoting the equipment reference. Third-party brands are cited for identification purposes only.
