VMAN D22B vs Weichai 6M31D740E310
The VMAN D22B and Weichai 6M31D740E310 are both diesel generator engines in a similar power class. Both are rated at roughly 832 kVA. Displacement is 21.927 L versus 18.6 L. The table below compares their full specifications side by side.
| Specification | VMAN D22B | Weichai 6M31D740E310 |
|---|---|---|
| Headline rating | 831 kVA | 833 kVA |
| Standby (50 Hz) | — | 666 kWe |
| Prime (50 Hz) | — | 612 kWe |
| Standby (60 Hz) | 665 kWe | 666 kWe |
| Prime (60 Hz) | 604 kWe | 612 kWe |
| Displacement | 21.927 L | 18.6 L |
| Configuration | V12 | V6 |
| Cylinders | 12 | 6 |
| Rated speed | 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | China National Stage III / Unregulated |
| Dry weight | — | — |
| Origin | China | China |
Choosing between VMAN D22B and Weichai 6M31D740E310
Use this comparison as an engineering shortlist, then confirm the complete generator package against load profile, voltage, 50/60 Hz frequency, duty class, emissions rules, cooling margin, altitude, ambient temperature, enclosure design, controller features, and alternator sizing. The Weichai 6M31D740E310 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.