Air Filters

Model: 3PU51-280

Core Technical Parameters

Filter Grade: PU Particulate Pre-filter

Absolute Filtration Precision: 3 μm solid particles

Filtration Efficiency: ≥99% for 3μm contaminants

Filter Media: Pleated cellulose filter paper

Flow Direction: Outside-to-inside airflow

Overall Size: 5.1 inch OD × 28 inch length

Max Working Temperature: 107℃ / 225℉

End Seal Material: High-temperature urethane

Rated Large Flow Capacity: Up to 2490 CFM

Service Life: 4000–6000 working hours / max 15 months

Applicable Medium: Compressed air, industrial nitrogen gas

Key Product Features

Front-stage heavy-duty particulate protection

Traps pipeline rust, scale, dust, bulk liquid water and large oil droplets, effectively protect downstream coalescing & activated carbon filter cartridges and extend their service life.

Large-flow low pressure drop pleated structure

High pleat count design delivers ample filtration area, maintains stable low differential pressure under continuous high-flow operation and reduces air compressor energy consumption.

Rigid reinforced inner support cage

Robust metal inner retainer prevents media collapse and deformation under heavy dust load, suitable for long-term 24/7 industrial operation.

High dirt holding capacity

Thick cellulose media holds massive solid contaminants, lowering filter replacement frequency and maintenance cost.

Main Application

Serves as primary pre-filtration stage for large-flow compressed air post-processing systems.

Ideal for heavy-dust industrial environments: steel plants, metal spraying, mining equipment, general machinery, packaging, textile and nitrogen purification systems.