Compressed Air Purity Guide: What You Actually Need to Know

The Compressed Air and Gas Institute (CAGI) has released its all-new Compressed Air Purity Guide, a comprehensive resource designed to help industries achieve clean, dry compressed air.

Most systems are pulling in contaminated ambient air from the start. Without proper treatment, that contamination moves through your entire compressed air system and into your equipment or product.

The 3 Main Contaminants in Compressed Air

• Particles – dust, dirt, rust, and microorganisms that clog filters and damage components
• Water – moisture that condenses during compression, leading to corrosion and failures
• Oil – from compressors or ambient hydrocarbons that contaminate air systems

Not All Compressed Air Needs the Same Purity

The required air quality depends on your application:

• Plant Air – general use like tools and shop equipment
• Instrument Air – cleaner air for controls and sensitive equipment
• Process Air – highest purity when air contacts the product

Food, beverage, and pharmaceutical applications typically require the highest level of air treatment.

How to Achieve Clean, Dry Air

Getting clean compressed air comes down to using the right combination of equipment:

• Dryers – refrigerated for general use, desiccant for low dew points
• Filters – particulate, coalescing, and activated carbon
• Drains & Separators – remove liquid water and condensate

Why This Matters

Dirty compressed air leads to:

• Premature equipment failure
• Higher maintenance costs
• Product contamination risks
• Reduced system efficiency

Bottom Line

Compressed air purity is not optional. Matching the right filtration and drying setup to your application helps protect your equipment, your product, and your bottom line.

You can view the news release from Compressed Air Best Practices and directly download the CAGI Compressed Air Purity Guide PDF to learn more.