PSI
PSI 20L
PSI 20L is a 19.6 L L6 spark-ignition natural-gas generator engine. Natural-gas ratings: 50 Hz prime 365 kWe / 414 kWm; 50 Hz standby 400 kWe / 460 kWm; 60 Hz prime 400 kWe / 450 kWm; 60 Hz standby 500 kWe / 570 kWm. Ratings exclude propane/LPG data and were verified from official PSI natural-gas rating tables.
Overhaul & repair parts- Manufacturer files
- 2 datasheets
- Last updated
- 2026-07-24
- Package route
- gas generator sets
- Standby Power · 50 Hz
- 500 kVA
- Electrical Output
- 400 kWe
- Cylinders
- L6
- Displacement
- 19.6 L
- Rated Speed
- 1,500 / 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 414 | 365 | 456.3 |
| Standby Power | 460 | 400 | 500 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 450 | 400 | 500 |
| Standby Power | 570 | 500 | 625 |
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PSI 20L overhaul & repair parts
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PSI 20L generator set context
The PSI 20L is listed here as a natural gas generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 500 kVA / 400 kWe / standby rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
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Technical Specifications
| Brand | PSI |
| Model | 20L |
| Configuration | L6 |
| Cylinders | 6 |
| Displacement | 19.6 L |
| Compression Ratio | 10.5:1 |
| Dry Weight | 2110 kg |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Stationary |
| Certifications | EPA |
| Country of Origin | United States |
Frequently asked questions
What is the power output of the PSI 20L?
The PSI 20L is rated at 500 kVA standby / 456 kVA prime at 50 Hz (1,500 rpm); and 625 kVA standby / 500 kVA prime at 60 Hz (1,800 rpm).
Does the 20L run at 50 Hz or 60 Hz?
The PSI 20L is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the PSI 20L use?
The PSI 20L is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the 20L?
The PSI 20L is an inline-6 (6-cylinder) engine with a displacement of 19.6 L.
What emissions information is listed for the 20L?
This record lists U.S. EPA Stationary for the PSI 20L. Confirm the exact engine family, model year, configuration and applicable manufacturer certification documents before specifying it for a regulated project. A database label does not establish certification of a complete generator package.
What is the catalog status of the PSI 20L?
The PSI 20L is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.
Are reference documents available for the 20L?
This page links reference documents for the PSI 20L. Check each document's title, model coverage, revision and rating conditions before using it for selection.