Coalescing Filters

Part No: 2901207211

Core Technical Specifications

Outlet Residual Oil Content: ≤0.1 ppm, fully compliant with ISO 8573-1 Class 2 clean air standard

Filtration Efficiency: 99.99% removal efficiency for 1μm liquid aerosols

Filter Media: Multi-layer gradient hydrophobic borosilicate glass fiber composite, outer blue oleophobic anti-re-entrainment foam sleeve with anti-static coating

Mounting: Central metal mandrel bayonet lock quick plug-in structure

Operating Limits

Continuous Operating Temperature: 2°C ~ 80°C

Standard Replacement Cycle: Replace after 4,000 operating hours or 12 months, whichever comes first

Differential Pressure Service Thresholds

Initial Differential Pressure: ≤0.014 MPa

Sealing System: Reinforced PA polyamide end caps with integrated dual NBR nitrile rubber flat gaskets, zero air bypass leakage

Support Structure: Double-layer 304 stainless steel perforated inner & outer protective cage, anti-deformation under full rated airflow load

Key Product Advantages

Intermediate Polishing Stage to Protect Downstream High-Cost Precision Filters

Installed downstream of 2901207210 PD particulate prefilter, this blue DD grade cartridge intercepts fine 1μm oil/water aerosols and bulk condensed liquid water that pass the dust stage. It drastically reduces liquid contamination load on QD ultra-high efficiency and activated carbon filter elements, extends their service life and cuts overall system maintenance and spare parts expenditure.

Large Liquid Holding Capacity for High-Humidity Workshop Environments

Thick multi-gradient hydrophobic fiber matrix provides massive oil & water storage volume, resisting rapid saturation in factories with insufficient aftercooler or refrigerated dryer performance.

Low Flow Resistance for Energy Saving

Deep-pleated glass fiber maximizes effective filtration area, maintaining stable low pressure drop under 24/7 full-load continuous operation, lowering extra power consumption of medium & large central air compressor stations.

Hydrolysis & Abrasion Resistant Fiber-Free Construction

Oil-repellent borosilicate glass fiber matched with stainless steel support cage prevents fiber shedding under long-term humid compressed air impact, eliminating secondary pipeline contamination to downstream pneumatic valves and general processing equipment.

Working Principle

Pre-cleaned compressed air from PD particulate prefilter flows outside-in through the filter cartridge:

Bulk liquid water and large solid particles are blocked by outer blue hydrophobic foam;

Micro oil & water aerosols collide and coalesce into large liquid droplets across multi-layer gradient glass fiber media;

Outer blue anti-re-entrainment foam sleeve stops coalesced liquid droplets from being re-carried by high-speed airflow;

Condensed oil and water drain down to the filter bowl by gravity;

Medium-clean dry compressed air is delivered downstream to QD ultra-high efficiency coalescing filter for ultra-fine precision polishing treatment.