Compressed air in a food or beverage plant frequently touches the product, the packaging or the surfaces around them. Conveying, filling, capping, nitrogen blanketing and pneumatic controls all rely on compressed air, so any contamination travels directly into the supply chain.
Why oil-free air is non-negotiable
Oil carryover can taint flavour, stain packaging and trigger regulatory failures. Food and beverage operations therefore specify ISO 8573-1 Class 0 oil-free air and treat the full system for particles and moisture. Dryers and coalescing filters are not optional add-ons; they are part of the hygiene barrier.
System design for hygienic production
- Oil-free compressor with stainless or corrosion-resistant pipework
- Refrigerated dryer plus adsorption dryer where dew point is critical
- Point-of-use filtration at each critical machine
- Drain management to prevent condensate pooling
Where air is used
Typical points include air knives for drying containers, pneumatic conveyors, form-fill-seal packaging, capping and labelling machines, and cleanroom instrumentation. Each point has its own purity and pressure requirement, so the system should be designed backwards from the process, not from the compressor room.