Can food companies only use oil-free screw air compressors?

Food companies do not only use oil-free screw air compressors, but oil-free screw air compressors do have a wide range of applications in the food industry and are often the preferred equipment. The following is a description of three dimensions: industry specifications, equipment characteristics, and alternatives:

1. the core requirements of the food industry for compressed air

according to the Principles of Food Engineering and industry practice, the key requirements for compressed air in food production are:

1. zero oil pollution
   • if compressed air is in direct contact with food (e. g. food drying, packaging filling), it must comply ISO 8573-1 Class 0 standard, that is, the oil content in compressed air is less than or equal to 0.01 mg/m & sup3;, which is equivalent to completely oil-free.
2. High cleanliness
   • multi-stage filtration is required to remove particles, microorganisms and water vapor, and some scenarios (such as drug filling) need to be equipped with sterilization filters.
3. Stability and Compliance
   • it is necessary to continuously and stably supply compressed air in accordance with regulations (such as HACCP, FDA) to avoid pressure fluctuations or sudden pollution.

Suitability Advantage of 2. Oil-free Screw Air Compressor

oil-free screw air compressor has become the mainstream choice in the food industry, mainly because of its:

1. zero oil lubrication design
   • the use of water lubrication or special coating technology, from the root to prevent lubricating oil into the compression chamber, to meet the strict requirements of direct contact with food.
2. Energy efficient features
   • compared with traditional air compressors, energy saving is 20%-30%, and some models support frequency conversion adjustment to further reduce energy consumption.
3. Low maintenance costs
   • no need to change the lubricating oil and oil filter, reduce downtime maintenance time, suitable for food enterprises under the high health standards of continuous production needs.
4. intelligent monitoring capability
   • can be integrated with the Internet of things system, real-time monitoring of air quality and equipment status, early warning of potential failure.

3. other possible compressor options and limitations

in specific non-direct contact scenarios (such as equipment power, non-food packaging areas), food companies can also choose other compressors, but need to be accompanied by strict purification measures:

1. permanent magnet variable frequency screw air compressor
   • applicability: Suitable for compressed air does not directly contact with food links (such as peripheral equipment drive).
   • Requirements: Multi-stage oil-water separator and activated carbon filter shall be equipped, and oil residue shall be regularly detected (≤ 0.01 mg/m & sup3;).
2. Centrifugal air compressor
   • applicability: Suitable for large flow and low pressure scenarios (such as plant ventilation).
   • Restrictions: The efficiency fluctuates obviously with the load, and it is necessary to cooperate with the gas storage tank to stabilize the pressure.
3. Piston air compressor
   • restrictions: Only suitable for very small-scale workshops, high risk of oil contamination, frequent replacement of filter elements.

4. comprehensive selection suggestion

conclusion food companies do not only use oil-free screw air compressors, but they need to strictly evaluate the compressor type according to the process. In the core link involving food safety, oil-free screw air compressor is still the most reliable choice; other types of compressors need to cooperate with complex purification systems, and the operation and maintenance costs are high.