How to Select an Air Tank Size According to Compressor Size for Max Efficiency

To ensure maximum efficiency and reduce on-load off-load cycling of the compressor, it is crucial to select the appropriate air tank size in relation to the compressor size and actual air consumption frequency and pulsation.

Determining the Compressor Size

The compressor size, measured in CFM (cubic feet per minute), is a crucial factor in selecting the appropriate air tank size. The CFM rating for the compressor should be determined by the highest demand for air in the application.

Actual Air Consumption Frequency and Pulsation

The actual air consumption frequency and pulsation are also important factors in selecting an appropriate air tank size.

• If the demand for compressed air is continuous, a larger air tank is necessary to reduce on-load off-load cycling of the compressor.
• If the demand for compressed air is intermittent, a smaller air tank may be appropriate.
• If the pulsation rate is high, a larger tank may be necessary to reduce pressure fluctuations.
  

Selecting the Air Tank Size

Once the compressor size and actual air consumption frequency and pulsation are determined, the appropriate air tank size can be selected.

• For intermittent use, an air tank size of 2-3 times the compressor CFM rating is appropriate.
• For continuous use, an air tank size of at least 4-5 times the compressor CFM rating is recommended.
• For applications with high pulsation rates, a larger air tank may be necessary to reduce pressure fluctuations.
  

*By following these guidelines, an appropriate air tank size can be selected for compressor(s) installed that will ensure maximum efficiency and reduce on-load off-load cycling or minimum fluctuations on VSD compressors.