Air Filters

Part No: 3PU35-280

Absolute Filtration Precision: Solid contaminants ≥3μm 

Particle Removal Efficiency: 99.999% for 3μm solid particles

Filter Media: Deep-pleated reinforced cellulose paper composite, outer metal protective mesh jacket

Continuous Operating Temperature: ≤79°C (175°F)

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

Differential Pressure Thresholds

Initial clean differential pressure: ≤0.012 MPa

Mandatory replacement alarm: ΔP ≥ 0.07 MPa

Sealing & Support Construction

End Caps: One-piece solid urethane integrated sealing, zero air bypass leakage

Inner & Outer Support: Perforated carbon steel rigid cage, anti-collapse under full large airflow load

Key Product Advantages

First-stage protective barrier to extend service life of downstream high-cost coalescing & carbon filters

As the front pretreatment element of the whole compressed air purification system, this PU-grade cellulose filter intercepts most coarse solid impurities, pipeline rust and scale. It drastically reduces solid particle contamination load on CU, Grade6 and AU activated carbon cartridges, effectively lowering replacement frequency and overall factory maintenance expenditure.

Ultra-large dust holding capacity for heavy-dust industrial workshops

Deep-pleated cellulose matrix provides massive dust storage volume, resisting rapid clogging in metal machining, forging, sandblasting and other dusty environments, minimizing production downtime caused by frequent filter replacement.

Ultra-low airflow resistance to reduce central compressor station power consumption

Large-area deep-fold filter media optimizes internal air channels, maintaining stable low pressure drop under 24/7 full-load continuous large-volume operation, cutting extra power draw of central air compressor units and long-term electricity costs.

Rigid all-metal support cage with robust structural stability

Thick perforated steel inner core and outer protective mesh prevent media deformation or rupture under high airflow; integrated urethane end seal resists aging from condensed water and lubricant mist, ensuring permanent airtight sealing without bypass.

Working Principle

Raw unpurified compressed air flows outside-in through the filter cartridge:

Air first passes through outer steel protective mesh to block large metal debris;

All solid particles larger than 3μm are trapped and stored inside deep-pleated cellulose media;