Oil Free Air Compressors

You may have no choice over the quality of the compressed air used in your process – especially in the food and beverage, and, pharmaceutical industries – it just has to be absolutely contaminant free.

Air purity is critical for many applications where even the smallest drop of oil can cause product spoilage or damage the production equipment, resulting in potential unplanned downtime.

There are many options available to ensure your production runs smoothly and to industrial standards, and Direct Air are happy to advise on what would be the ideal solution for your circumstance.

ISO 8573-1 Class 0 Compressed Air

Direct Air can advise on the most suitable means to deliver an acceptable level of oil free compressed air from your existing or new system.

Compressed air purity classes for particles

ISO8573-1:2010 CLASS

Solid ParticulateWaterOil
Maximum number of particles per m³Mass Concentration mg/m³Vapour Pressure DewpointLiquid g/m³Total Oil (aerosol liquid and vapour)
0.1 – 0.5 micron0.5 – 1 micron1 – 5 micronmg/m³
0As specified by the equipment user or supplier and more stingent than Class 1
1≤ 20,000≤ 400≤ 10≤ -70℃0.01
2≤ 400,000≤ 6,000≤ 100≤ -40℃0.1
3≤ 90,000≤ 1,000≤ -20℃1
4≤ 10,000≤ +3℃5
5≤ 100,000≤ 7℃
6≤ 5≤ -10℃
75 – 10≤ 0.5
80.5 – 5
95 – 10
X> 10> 1010

Oil free compressors

Many manufacturers in critical applications industries choose ISO 8573-1 Class Zero oil-free compressors that provide clean, 100 percent oil-free air. However atmospheric conditions can lead to oil vapour being present in the air generated from an oil free air compressor.

Therefore, additional filtration may be necessary for the system as a whole or point of use depending upon the application.

As with all systems a detailed analysis of the process requirements is the best solution to ensure that the delivered air quality is suitable for the application.