Compressed Air Quality Calculator

ISO 8573 air quality class from application requirements.

Application type

System flow rate (CFM)

Ambient temperature (°F)

Ambient humidity (%)

Tab to move between fields

ISO 8573 Particle Class

ISO 8573 Water Class

ISO 8573 Oil Class

Required dew point (°F)37

Max oil content (mg/m³)1

Dryer type needed2

Filtration stages1

Est. condensate (gal/day)4.6

How to Use This Calculator

Enter the application type to set ISO 8573-1 quality class requirements.
Input current measured particulate count, pressure dew point, and oil content.
Review which ISO class is achieved for each contaminant.
Compare current quality to the required class for your most sensitive application.
Use the output to specify the correct filtration, drying, and separation equipment.

What each input means

Application type: 1 = General plant air, 2 = Spray painting, 3 = Food/beverage, 4 = Pharmaceutical, 5 = Electronics, 6 = Instrument air.
System flow rate (CFM): Total compressed air flow rate for condensate estimation.
Ambient temperature (°F): Ambient air temperature entering the compressor intake.
Ambient humidity (%): Relative humidity of ambient air at the compressor intake.

ISO 8573 Particle Class: Required particulate cleanliness class (1 = cleanest, 6 = least stringent).
ISO 8573 Water Class: Required moisture/dew point class (1 = driest, 6 = least stringent).
ISO 8573 Oil Class: Required oil content class (1 = cleanest, 4 = least stringent).
Required dew point (°F): Pressure dew point the dryer must achieve for the water class.
Max oil content (mg/m³): Maximum allowable total oil aerosol and vapor concentration.
Dryer type needed: 1 = None/membrane, 2 = Refrigerated, 3 = Desiccant, 4 = Heated desiccant.
Filtration stages: Number of filtration stages recommended for the particle class.
Est. condensate (gal/day): Estimated condensate generation requiring drainage and treatment.

Identify Input Parameters
4 parameters
Application type = 1, System flow rate (CFM) = 100, Ambient temperature (°F) = 85, Ambient humidity (%) = 60 = 4 input(s) provided
Calculate ISO 8573 Particle Class
ISO 8573 Particle Class
5 = 5
Calculate ISO 8573 Water Class
ISO 8573 Water Class
4 = 4
Calculate ISO 8573 Oil Class
ISO 8573 Oil Class
3 = 3
Calculate Required dew point
Required dew point
37 = 37
Calculate Max oil content
Max oil content
1 = 1