Coalescing Filters

Part No: F3-550406

Core Technical Specifications

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

Max Working Pressure: 1.0 MPa

Rated Air Flow @7 bar, 20°C: Matches standard flow rate of CKD F3 series compact filter housing

Mounting: Central threaded bayonet plug-in connection, one-piece black plastic top & bottom end caps with diversion ribs

Operating Limits

Max Working Pressure: 1.0 MPa

Continuous Operating Temperature: 1°C ~ 60°C

Standard Replacement Interval

4,000 working hours / 12 months under clean industrial air; shorten to 2,000–3,000 hours for dusty, high-humidity spray workshops. Replace when differential pressure ΔP ≥ 0.07 MPa.

Differential Pressure Replacement Thresholds

Initial pressure drop of new element: ≤0.014 MPa

Mandatory replacement alarm threshold: ΔP ≥ 0.07 MPa

Sealing & Support Construction

End Caps: Reinforced black PA plastic locking caps with integrated flow diversion ribs

Seal System: Built-in integral NBR nitrile rubber sealing ring, zero air bypass leakage, resistant to compressor oil and acidic condensate aging

Inner & Outer Support Cage: Single-layer perforated stainless steel mesh, anti-collapse under rated compact airflow

Key Product Advantages

Third-stage ultra-fine polishing barrier to protect downstream activated carbon filter and high-sensitivity miniature precision equipment

Installed after medium coalescing filter, this red-coded H-grade cartridge intercepts invisible trace submicron oil mist and micro water droplets that medium filters cannot separate. It drastically reduces oil contamination load on terminal activated carbon cartridges, extends carbon service life and cuts spare parts costs.

Compact high dirt & liquid holding capacity for small pneumatic systems

Deep pleated microglass matrix stores large volumes of oil and condensate within compact dimensions. Outer red drainage foam accelerates liquid separation and gravity discharge, slowing pressure rise in small workshop air loops and reducing unplanned downtime from frequent filter swaps.

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

Heat-cured borosilicate microglass composite paired with stainless steel support mesh prevents glass fiber powder shedding into small-bore air pipelines, protecting micro spray nozzles, tiny laser optical lenses and miniature solenoid valves from clogging failure.

Optimized low permanent differential pressure for small compressors

Central vent flow channel design minimizes airflow resistance throughout the full service cycle; stable low backpressure lowers continuous power consumption of mini screw compressors and small air pumps, cutting long-term factory electricity expenses.

Working Principle

Pre-filtered compressed air flows through the filter cartridge from outside to inside:

Residual small water droplets and fine solid impurities are trapped by outer red hydrophobic foam and drain into the filter bowl via gravity.

0.01μm ultra-fine oil-water micro-aerosols collide and coalesce into large separable liquid droplets while passing through multi-layer gradient borosilicate microglass media.

The outer anti-re-entrainment foam prevents separated liquid droplets from being re-carried by high-speed mini compressed airflow.

Collected oil and condensate are automatically discharged via mini float drain valve.

Ultra-dry air with residual liquid oil ≤0.01mg/m³ flows downstream to activated carbon filter for final oil vapor removal.

Application Industries

Miniature precision electronic testing equipment, portable electrostatic spray guns, compact mini laser marking machines, laboratory analytical instruments, cosmetic micro-filling lines, medical & dental small gas supply, miniature pneumatic automation test benches, small food sample packaging equipment, small automation robot air supply.