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How to calculate the intake air volume of air compressor

2026-04-15Views:

To calculate the air intake of the air compressor, you can follow the following steps:

  1. determine the displacement of air compressor:
    • exhaust volume refers to the volume of compressed air discharged by the air compressor per unit of time, usually in cubic meters per minute (m & sup3;/min) or cubic feet per minute (CFM). This data can usually be found in the nameplate or manual of the air compressor.
  2. Consider the compression ratio:
    • compression ratio refers to the ratio of air compressor exhaust pressure to suction pressure. Since the volume of compressed air will decrease during the compression process, the intake air volume will be larger than the exhaust gas volume.
  3. Use the formula to calculate the intake air volume:
    • the intake air volume (Q-suction) can be calculated by the following formula:
      Q suction = Q row × compression ratio
    • among them, the Q row is the displacement of the air compressor, and the compression ratio is the ratio of the exhaust pressure to the suction pressure.
  4. Examples:
    • assuming that the displacement of the air compressor is 10 m & sup3;/min, and the compression ratio is 5 (that is, the exhaust pressure is 5 times the suction pressure), then the intake air volume is:
      Q suction = 10 m & sup3;/min× 5=50 m & sup3;/min
  5. precautions:
    • in practical applications, it is also necessary to consider the influence of air temperature and pressure changes on the calculation results. If higher accuracy is required, more complex formulas can be used or the compressor manufacturer can be consulted for detailed calculations.

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