The pressure range of the low-pressure air compressor varies according to the application scenario and equipment design. Maximum pressure and minimum pressure the definition should be combined with technical specifications and actual needs:
1. Definition and Standard Classification
low pressure air compressor usually refers exhaust pressure at 0.2-1.0MPa(2-10bar) the model is suitable for scenarios with low requirements for compressed air pressure.
- International Standards: ISO 8573-1 defines a low-pressure air compressor as an equipment with an exhaust pressure ≤ 1.0MPa.
- Industry Standard: The upper limit of low-pressure air compressor is extended to 1.2MPa(12bar) in some domestic fields, but it needs to be confirmed in combination with equipment nameplate parameters.
2. maximum pressure
- design limit:
the maximum pressure of the low-pressure air compressor is set by the manufacturer and generally does not exceed 1.0MPa, some models can reach 1.2MPa. - If higher pressure is required (e. g. 1.2-3.0MPa), medium pressure air compressor shall be selected.
- Safety Redundancy:
in actual use, it is recommended to control the pressure less than 90% of the rated value(such as rated 1.0MPa, common pressure ≤ 0.9MPa) to avoid equipment overload.
3. minimum pressure
- technical lower limit:
there is no specific minimum pressure limit for low-pressure air compressors, but they are usually required to meet the requirements of pneumatic tools or processes. - Common Application Lower Limit: 0.4-0.5MPa(4-5bar), lower than this value may cause low equipment efficiency.
- Special Scene:
some processes (such as micro-pressure conveying) require lower pressure and can be passed through pressure reducing valve adjust below 0.2MPa however, additional voltage stabilizing device is required.
4. application scenarios and selection suggestions
| Industry | pressure demand | equipment selection |
|---|
| textile/Foam | 0.5-0.8MPa | standard low pressure air compressor |
| food Processing | 0.6-0.8MPa | oil-free low-pressure air compressor (to avoid oil pollution) |
| laboratory | 0.4-0.6MPa | silent low-pressure air compressor + precision pressure regulating valve |
| inflatable toys | 0.2-0.3MPa | customized low-pressure air compressor (need to be equipped with decompression system) |
5. energy efficiency and reliability
- pressure matching: Select the model with the pressure range matching the demand to avoid the waste of energy consumption caused by "big horse-drawn trolley.
- Maintenance recommendations:
- the accuracy of the pressure sensor shall be tested every quarter (the error shall be ≤ ± 0.05MPa).
- Use frequency conversion controller dynamic adjustment of pressure, energy saving about 15-30%.
Summary: The maximum pressure of the low-pressure air compressor is usually not more than 1.2MPa, and the minimum pressure should be determined according to the process requirements (it is recommended to be ≥ 0.4MPa). When selecting the equipment, priority should be given to the matching of the rated pressure of the equipment with the actual application scenario, and the energy efficiency should be optimized through the pressure adjustment device.
