@air
2025-04-11
Compressed air requirements for food companies
The food industry has extremely strict quality requirements for compressed air and must be met at the same time.No oil pollution, low moisture content, high cleanlinessThree core standards and comply with relevant health certifications. The following are the specific technical requirements and solutions:
1. Core standard parameters
- oil-free grade
- ISO 8573-1:2010 Class 0(Completely oil-free, oil content <0.01 mg/m³).
- implementations: Must be usedoil free compressor(Such as centrifugal type, water-lubricated screw type).
- moisture content control
- Pressure dew point ≤-40℃(Corresponding to ISO Class 1), avoid the breeding of microorganisms in condensed water.
- configuration scheme: Freeze dryer (pre-cooling to +5℃)+ adsorption dryer (deep drying to-40℃).
- of particulate filter
- Residual particulate matter ≤0.1μm(ISO Class 1), to prevent foreign matter from contaminating food.
- filtration system: Three-level filtration (G1 primary effect +F7 medium effect +H13 high efficiency)+ activated carbon deodorization.
2. Key points of equipment selection
| device type | technical requirements | remarks |
|---|---|---|
| air compressor | Oil-free screw/centrifugal type with frequency conversion adjustment | Centrifuges require anti-surge control |
| dryer | Combined freezing + adsorption type, dew point below-40℃ | The adsorption dryer needs to be replaced regularly |
| filter | 0.01μm filter element, differential pressure alarm function | Replace the filter element every 6 months and record the replacement cycle |
| Pipe/storage tank | 304 stainless steel, polished inner wall | Avoid rust shedding and pollution |
3. Health management requirements
- system certification
- meetHACCP、ISO 22000and other food safety system requirements.
- Critical equipment needs to pass3A、EHEDGSanitary design certification.
- monitoring and verification
- Install dew point meters and oil content detectors, and commission third-party testing every quarter.
- Keep test reports and establish quality traceability records.
- maintenance specifications
- Drain condensate daily and check filter pressure differential weekly.
- Annual in-depth maintenance: cleaning the drying tower and calibrating sensors.
4. Special scenario solutions
- high temperature and high humidity environment: Add precooler (reduce the intake air temperature by 5℃~8℃).
- cleanroom applications: Equipped with epoxy coating for stainless steel pipes to reduce particulate matter attachment.
- explosion-proof area: Select ATEX certified equipment and configure explosion-proof motor.
Note: For dairy products, baking and other processes that require direct contact with food, it is recommended to set up an independent compressed air station to avoid cross-contamination with other production systems.
