Dry Particulate Filters
Dry particulate filters are integral for removing desiccant particles after an adsorption air dryer. They act as a sieve, preventing dust and particles from causing clogs by filtering through a membrane material. This membrane essentially functions as a gate, only allowing air to pass through while blocking larger contaminants.
Coalescing Filters
Coalescing filters play a vital role in capturing oil, aerosols, and tiny moisture droplets to prevent condensation in the system - essential for eliminating rust. The separation is a two-phase process. Smaller droplets merge with larger ones, enabling their removal from the filter. A re-entrainment barrier then prevents these droplets from re-entering the air.
Vapour Removal Filters
Vapour removal filters are designed to extract gaseous lubricants that make it through the coalescing filter. However, these filters are not suitable for capturing lubricant aerosols as they could saturate the filter and render it ineffective within hours. To avoid this, a coalescing filter should precede a vapour removal filter. These filters employ activated charcoal as the filtering medium in the adsorption process.