Coalescing Filters

Part No: 9.4878.0

Core Technical Specifications

Filtration Efficiency: 99.9999% capture efficiency for 0.01 μm oil mist aerosols per ISO 12500-1 multi-pass test standard

Filter Media Structure: Multi-layer deep-pleated gradient borosilicate microglass composite, outer green hydrophobic & oleophobic drainage foam layer to eliminate liquid re-entrainment, graded density deep pleats for high dirt holding capacity

4,000–5,000 working hours / 12 months under clean industrial conditions; shorten to 2,000–3,000 hours in high-humidity, dusty workshops. Replace immediately once differential pressure hits alarm threshold.

Differential Pressure Replacement Thresholds

Initial pressure drop of new element: ≤0.014 MPa

Mandatory replacement alarm trigger point: ΔP ≥ 0.07 MPa

Sealing & Support Construction

End Caps: Reinforced black PA polymer locking end cap with integrated flow diversion ribs

Seal System: Integrated full-circle NBR nitrile rubber gasket, zero air bypass leakage, resistant to compressor oil, acidic condensate and long-term aging

Inner & Outer Support Cage: Double-layer perforated 304 stainless steel mesh, anti-collapse under full rated airflow

Key Product Advantages

Third-stage ultra-fine polishing barrier to protect downstream 9.4890.0 activated carbon filters and high-sensitivity precision production equipment

Installed after 9.4872.0 KE medium coalescing filter, this FE-grade cartridge intercepts invisible trace submicron oil mist and micro water droplets that medium-grade filters cannot separate. It drastically reduces oil contamination load on terminal activated carbon cartridges, extends carbon service life and cuts factory spare parts & maintenance expenses.

Large oil & liquid holding capacity for stable long-cycle continuous operation

Thick deep-pleated microglass matrix provides massive liquid retention volume. Special drainage rib structure accelerates liquid separation and gravity discharge, resisting rapid pressure rise in humid production workshops with underperforming aftercoolers or refrigerated dryers, minimizing unplanned production downtime from frequent filter swaps.

Heat-stabilized integrated media, zero fiber shedding to avoid secondary pipeline contamination

Heat-cured solidified microglass composite paired with stainless steel support mesh prevents glass fiber powder detachment under long-term high-flow airflow impact. No glass fiber debris will block spray guns, laser optical lenses and miniature pneumatic control valves.

Ultra-low permanent differential pressure to reduce air compressor energy consumption

Uniform gradient pore layout minimizes airflow resistance throughout the full service lifespan; KAESER optimized flow channel design delivers up to 50% lower pressure loss than generic filters, cutting continuous power draw of large screw air compressors and lowering long-term factory electricity costs

Working Principle

Medium-clean compressed air flows through the filter cartridge from outside to inside:

Residual large condensed water droplets and fine solid particles are trapped and drained by the outer green hydrophobic foam layer, flowing down to filter bowl via gravity;

Micro submicron oil & water aerosols collide, coalesce and form large separable liquid droplets while passing through multi-layer gradient borosilicate microglass media;

The outer anti-re-entrainment foam prevents coalesced liquid droplets from being re-carried into high-speed compressed airflow;

Ultra-dry compressed air with residual liquid oil ≤0.01mg/m³ flows downstream into activated carbon filter for final oil vapor adsorption treatment.

Application Industries

Automotive large electrostatic spray booths, heavy-duty laser cutting equipment, pharmaceutical mass filling production lines, large laboratory central air supply, food & beverage aseptic packaging factories, electronics cleanroom assembly workshops, medical central gas supply, automated multi-station production lines requiring strict Class 1 ultra-pure compressed air.