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Wärtsilä 31SG Gas Engine Generator Set — 10.4–12.8 MW, 20V
Wärtsilä 31SG gas engine generator set for sale — a 20-cylinder medium-speed power-plant engine of 10.4–12.8 MW at up to 52% electrical efficiency.
Wärtsilä 31SG gas engine generator set available through Pantheon. The 20V31SG is Wärtsilä’s highest-efficiency gas engine, offered alongside the 34SG rather than as its replacement. Wärtsilä rates three tunings at 50 Hz (750 rpm) and 60 Hz (720 rpm): standard at 11,777 and 11,377 kW, efficiency-optimised at 10,790 and 10,389 kW, and power-optimised at 12,762 and 12,372 kW, with electrical efficiency of 51.5–52.0% at 50 Hz and 50.2–50.4% at 60 Hz. It runs on natural gas and suits baseload and flexible plants where fuel cost dominates. Exact rating and configuration confirmed at quote.
Specifications
| Type | Medium-speed lean-burn gas engine generator set |
|---|---|
| Standard | 11,777 kW (50 Hz) · 11,377 kW (60 Hz) |
| Efficiency-optimised | 10,790 kW (50 Hz) · 10,389 kW (60 Hz) |
| Power-optimised | 12,762 kW (50 Hz) · 12,372 kW (60 Hz) |
| Efficiency | 51.5–52.0% (50 Hz) · 50.2–50.4% (60 Hz) electrical |
| Speed | 750 rpm (50 Hz) · 720 rpm (60 Hz) |
| Fuel | Natural gas |
| Related | Wärtsilä 20V34SG 9.4–10.8 MW |
Specifications shown are headline figures. Confirm full configuration details when you request a quote.
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