Wärtsilä INDUSTRIAL ENGINES
In ProductionWärtsilä 20V31SG
31SG
Wärtsilä 20V31SG — 649.1 L V20 four-stroke lean-burn spark-ignited gas engine generating set (Wärtsilä 31SG), for power plants. 11779 kWe at 750 rpm / 50 Hz, 11377 kWe at 720 rpm / 60 Hz; electrical efficiency 51.5%.
Standby Power
14724 kVA
Electrical Output
11779 kWe
Cylinders / Config
V20
Displacement
649.1 L
Rated Speed
750 RPM
ISO 8528 Power Ratings
Power Factor: 0.8 pfkWm = mechanical engine shaft power · kWe = electrical output · kVA = apparent electrical power.
| Operating Duty | kWm (Mechanical) | kWe (Electrical) | kVA (Rating) |
|---|---|---|---|
| Prime | — | 11779 | 14723.8 |
| Operating Duty | kWm (Mechanical) | kWe (Electrical) | kVA (Rating) |
|---|---|---|---|
| Prime | — | 11377 | 14221.3 |
Mechanical & Electrical Specifications
| Brand | Wärtsilä |
| Model | 20V31SG |
| Series | 31SG |
| Configuration | V20 |
| Cylinders | 20 |
| Displacement | 649.1 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | Finland |
Frequently Asked Questions
What is the power output of the Wärtsilä 20V31SG?
The Wärtsilä 20V31SG is rated at 14,724 kVA prime at 50 Hz (750 rpm); and 14,221 kVA prime at 60 Hz (900 rpm).
Does the 20V31SG run at 50 Hz or 60 Hz?
The Wärtsilä 20V31SG is available for both 50 Hz (750 rpm) and 60 Hz (900 rpm).
What fuel does the Wärtsilä 20V31SG use?
The Wärtsilä 20V31SG is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the 20V31SG?
The Wärtsilä 20V31SG is a V20 (20-cylinder) engine with a displacement of 649.1 L.
Is the Wärtsilä 20V31SG still in production?
Yes — the Wärtsilä 20V31SG is a current production model.
Is a datasheet available for the 20V31SG?
Yes — an official Wärtsilä datasheet for the Wärtsilä 20V31SG can be downloaded from this page.