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CHANGE PERFORMANCE
EXISTING BLOWERS & COMPRESSORS

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Re-rates are changing the performance of the equipment. Majority of re-rates keep the same dimensions. Common reasons units are re-rated:

  • Increase or Decrease Flow
  • Increase pressure rise
  • Increase turndown capability

EXAMPLE OF INCREASING PRESSURE

80% ARE NOT SIZED PROPERLY

Re-rates are changing the performance of the equipment. Majority of re-rates keep the same dimensions.

Common reasons units are re-rated:

  • Increase or Decrease Flow
  • Increase pressure rise
  • Increase turndown capability
  • Increase energy efficiency

Geared Turbo are re-rated:

  • Change Gear Set
  • Cut Down Impeller
  • Add VFD and Controls

Multistage Turbo are re-rated:

  • Change Impeller Mix
  • Add  or Delete Stages
  • Change Control to VFD