Core Functions of Coalescing Filters
Coalescing filters are used across multiple industries for:
Compressed Air Purification: Removes oil mist and water vapor in air compressors
Fuel Systems: Eliminates free water from diesel, jet fuel, and gasoline
Natural Gas Processing: Improves gas quality by removing water, hydrocarbons, and H₂S
Oil-Water Separation: Acts as an oil coalescing filter in separators
Instrument Protection: Prevents moisture damage in sensitive measurement systems
How Do Coalescing Filters Work?
Stage 1: Coalescence
As air or gas passes through coalescing filter elements, submicron aerosols undergo:
Inertial impaction – Particles collide with the glass fiber media
Direct interception – Droplets larger than fiber gaps get trapped
Brownian diffusion – Smaller particles stick to fibers via molecular motion
These filter coalescer elements merge tiny droplets into larger ones.
Stage 2: Gravity Separation
Larger droplets settle by gravity
Oil collects in a sump (e.g., in coalescing filter for air compressors)
Water settles at the bottom in fuel/gas applications
High-performance coalescing filters achieve up to 99.98% efficiency for 0.3μm particles
Top 5 Benefits of Using a Coalescing Filter
Submicron Precision
Captures particles as small as 0.01μm—smaller than most viruses
Low Pressure Drop
< 0.5 psi pressure drop → Save up to 30% energy
Corrosion Resistance
316L stainless steel housing ideal for H₂S-rich environments
Long-Life Elements
U.S.-made HV glass fiber lasts 12–24 months
Modular Systems
Support online replacement—no shutdowns required
