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Coalescing filters remove oil aerosols, water vapor, and submicron particles from compressed air by forcing contaminated air through specialized media that captures and drains liquid contaminants – achieving oil concentrations as low as 0.01 ppm while removing 99.99% of particles down to 0.01 microns, making them essential for food processing, pharmaceuticals, electronics manufacturing, and other critical applications requiring truly clean compressed air.

Proper FRL setup and maintenance involves setting correct pressure levels (typically 10-15 PSI below maximum component rating), replacing filter elements every 3-6 months, adjusting lubrication rates to 1-2 drops per 1000 cycles, and performing weekly visual inspections – following these practices can extend pneumatic component life by 200-300% while reducing system failures by up to 85%.

Absolute micron rating guarantees that 99.98% of particles larger than the specified size are removed, while nominal rating typically captures only 85-95% of a of particles at the stated size – meaning a nominal 5-micron filter may allow particles up to 15-20 microns to pass through, potentially damaging sensitive pneumatic components.