2026-04-13Views：
Compressed air needs to meet a series of strict standards in terms of food grade requirements to ensure food safety and hygiene. The following is a detailed summary of the food grade requirements for compressed air:
1. purity requirements
compressed air must be free of oil, water, dust and other contaminants. Specifically:
the oil content should be less than 0.1 mg/m & sup3;, to ensure that the compressed air does not contain oil, to avoid food pollution.
The water content should be lower than a certain standard, such as 7ppm or pressure dew point to -40 ℃, to prevent the adverse effects of moisture on food.
The particle size should be less than 0.01 μm (microns) to ensure that the compressed air is free of dust and other solid particles.
2. Odor and Taste Requirements
compressed air should have no peculiar smell and no bad taste to avoid adverse effects on the flavor of food. This usually means that the odor level in the compressed air should be below a certain standard, such as 0.5.
3. microbiological control requirements
the microbial content in compressed air should be controlled within a safe range to prevent microbial contamination of food. Specifically, the number of bacteria should be less than 100 CFU/m & sup3; to ensure food hygiene and safety.
4. other requirements
in addition to the above requirements, food-grade compressed air also needs to meet the following standards:
the pH value should be between 6.5 and 8.5 to ensure that the pH of the compressed air is moderate and will not cause corrosion to the food or affect the quality of the food.
It should have constant pressure and flow to ensure the stability and consistency of the food processing process.
In summary, the requirements for food-grade compressed air include high purity, no odor, low microbial content, and other specific physical and chemical indicators. Together, these standards ensure the safety and hygiene of compressed air during food processing. Please note that different regions and enterprises may have their own standards and testing methods, so they need to be implemented according to local regulations.
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