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What is the pressure per square centimeter of the air compressor

2026-04-15Views:

The "per square centimeter" representation of air compressor pressure (kgf/cm²) is a commonly used pressure unit in Asia, and the conversion relationship with the legal unit of measurement bar is as follows:

1. Unit Definition

  1. 1 kgf/cm²= 98,066.5 Pa(Pascal)
    • defined as the pressure of 1 kilogram of force acting vertically on an area of 1 square centimeter.
  2. 1 bar= 100,000 Pa
    • the most commonly used unit in the field of compressed air.

2. conversion formula

kgf/cm²=bar×1.0197

or

bar=kgf/cm²×0.9807

3. common values comparison table

bar kgf/cm² application Scenarios
1 bar1.02 instrument gas and low pressure equipment
3 bar3.06 spraying equipment, small pneumatic tools
5 bar5.10 pharmaceutical cleanroom, medium power tools
7 bar7.14 bottle blowing machine, high pressure cleaning equipment
10 bar10.20 mine rock drill, special process

4. Conversion Example

  • if the air compressor pressure is 7 bar:
    7×1.0197≈7.14kgf/cm²

  • if 5 kgf/cm² is required:
    5 ÷ 1.0197 & asymp;4.9bar (air compressor pressure to be set)

5. considerations

  1. accuracy requirements: Pa or bar is recommended for precision scenarios, kgf/cm² is an engineering approximation.
  2. Device compatibility: Japanese/Taiwanese equipment is often marked with kgf/cm, while European and American equipment is often marked with bar.
  3. Regulatory restrictions: China's "Compressed Air Station Design Code" recommends the use of bar units.

Note: In practical engineering, it is recommended to use bar or MPa(1 MPa = 10 bar) uniformly to avoid confusion.

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