Compressed air filters work by utilising different filtration principles depending on the type of filter. Here's a brief overview of how each type of filter operates:

Particulate filters use a fine mesh or membrane to trap solid particles. As compressed air passes through the filter, contaminants are captured on the surface of the membrane, allowing clean air to pass through. These filters are effective at removing particles down to a few microns in size.

Coalescing filters use a combination of mechanical and chemical processes to remove liquid contaminants. As compressed air passes through the filter, small droplets of water and oil coalesce into larger droplets. These larger droplets are then captured by the filter media and drained away, leaving clean, dry air.

Activated carbon filters use adsorption to remove gaseous contaminants. The activated carbon in the filter has a large surface area with many pores, which attract and trap gaseous molecules. As compressed air passes through the filter, harmful gases and odors are adsorbed onto the carbon, ensuring that the air is clean and odor-free.