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Variable speed systems

RECOVAR®-E: The variable speed drive system

RECOVAR®-E: The variable speed drive system<br> 

The industry has been developing solutions for variable speed settings for compressors and pumps for over 20 years now. Prior solutions did not prove effective over the long-term due to their complexity as well as high power losses and extreme maintenance costs. Higher efficiency requirements paired with the lowest possible investment and long-term operation form the basis for our new concept:

RECOVAR®-E is a variable-speed power splitting gearbox with an energy recovery system and maximum efficiency across all operating points. RECOVAR®-E stands for Renk ECOnomic VARiator. A modern hybrid consisting of mechanical and electrical features that offers an ideal solution for both worlds.

More than 50% of all compressor and pump systems over 3 MW require a variable-speed drive. RECOVAR-E offers an optimal cost-effective and efficient solution for applications of this type.


  1. Highest efficiency of all comparable propulsion systems
  2. No center distance due to flush shafts
  3. Smallest system size by comparison
  4. Energy recovery
  5. DOL starting option
  6. Low moment of inertia
  7. Negligible impact on network
  8. Smaller size of the main engine
  9. Conservative API 613 toothing
  10. Large speed range
  11. Maintenance-friendly design
  12. Control system shutdown in main operating point
  13. High availability
  14. Minimum space requirement for electrical system components (20%)

Technical Data

Power:3 - 150 MW
Low speed shaft:< 1 800 rpm
High speed shaft:4 000 - 25 000 rpm
Ratio:3 - 15

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High-Speed Gearboxes Team

Get in touch with our experts in case of any questions.

High-Speed Gearboxes Team
Phone number
+49 821 5700 0
[email protected]

High-Speed Gearboxes Team

Phone number
+49 821 5700 0