Coalescing Filters

Part No: DH050AO

Core Technical Specifications

Multi-layer deep folded gradient HV borosilicate glass fiber composite media, outer integrated hydrophobic & oleophobic PU anti-re-entrainment drainage foam. Deep pleat design expands filtration area by 450% vs traditional flat media, strong water/oil repellency to avoid liquid re-entrainment.

Continuous Operating Temperature: -10°C ~ 80°C

6,000 working hours / 12 months (whichever comes first) under clean intake air; shorten to 3,000 hours for dusty spray booth, foundry and high-humidity environments. Mandatory replacement when differential pressure ΔP ≥ 0.07 MPa.

Differential Pressure Replacement Thresholds

Initial pressure drop of new element: ≤0.007 MPa

Max saturated differential pressure: ≤0.14 MPa

Mandatory alarm replacement threshold: ΔP ≥ 0.07 MPa

Key Product Advantages

Front-stage primary coalescing protection to extend service life of downstream high-precision filters

Installed after water separator and dust prefilter, AO grade intercepts pipeline bulk condensed water, rust particles and large 1μm liquid oil mist. It drastically reduces liquid contamination load on AA ultrafine and ACS carbon filters, cutting overall factory spare parts consumption and maintenance frequency.

Ultra-large dirt & oil holding capacity with stable low differential pressure

Proprietary deep-fold glass fiber matrix stores massive oil sludge, condensate and solid dust without rapid pressure rise, perfectly matching non-stop heavy-duty continuous production. Outer hydrophobic foam rapidly drains liquid to filter bowl, minimizing oil re-entrainment risk.

Heat-stabilized glass fiber media eliminates fiber shedding and secondary pipeline contamination

High-temperature cured borosilicate glass fiber remains stable under 80°C oil-gas mixing conditions, no softening or pulverization. Zero glass fiber debris enters air piping to block spray guns, laser lenses and proportional solenoid valves.

Low permanent differential pressure design reduces compressor power consumption

Uniform gradient pore layout maintains minimal airflow resistance throughout full service cycle. Stable low backpressure reduces continuous motor load of large screw air compressors and slashes long-term workshop electricity operating costs.

Domnick Hunter OIL-X series bayonet quick-maintenance design

Unified central bayonet positioning structure perfectly fits DH050 filter housing. A single technician completes full cartridge replacement within 3 minutes after full system pressure relief, no complete disassembly of filter tank required.

Working Principle

Pre-dried large-volume compressed air flows through filter cartridge from outside to inside:

Large water droplets and coarse solid impurities are trapped by outer white hydrophobic foam, drain down to filter bowl by gravity.

1μm oil-water micro-aerosols collide and coalesce into large separable liquid droplets while passing through multi-layer gradient borosilicate glass fiber media.

Outer anti-re-entrainment foam barrier prevents separated liquid oil from being re-carried by high-speed large-volume compressed airflow.

Collected oil and condensate are automatically discharged via electronic zero-loss drain valve.

Medium-clean air with residual liquid oil ≤0.6 mg/m³ flows downstream to DH050AA ultrafine coalescing filter for secondary high-precision purification.

Application Industries

Full vehicle automotive electrostatic spray production lines, heavy industry large-format laser cutting workshops, large-scale pharmaceutical central aseptic filling air supply, electronics factory large cleanroom main gas source, food & beverage large sterile packaging plants, multi-station heavy automation production lines with high air demand requiring medium-clean industrial compressed air.