Primary efficiency pleated filter

Primary Foldable Air Filter (G1-G4) - Pre-Filtration for Industrial & Commercial

I.Technical Specifications

Filtration Class: G1/G2/G3/G4 (EN 779:2012)

Filter Media: Non-woven Fabric / Needle-punched Cotton / Reusable Metal Mesh (optional)

Rated Air Flow: 500-3000 m³/h (per unit, customizable)

Initial Pressure Drop: 20-60 Pa (at rated air flow)

Dust Holding Capacity: 150-300 g/m² (varies by media type)

Temperature Resistance: -10℃~80℃ (standard); 120℃ (high-temp option)

Standard Sizes: 300×300×220mm, 400×400×220mm (custom sizes available)

II.Application Scenarios

Industrial Workshops (Metal/ Electronics/ Machinery)

Recommended Specs: G3/G4 + Non-woven Fabric + 2000-3000 m³/h

Value: Captures metal dust/cuttings, protects ventilation systems, reduces equipment maintenance

III.HVAC Fresh Air Systems

Recommended Specs: G2/G3 + Low-resistance Needle-punched Cotton + 1000-1500 m³/h

Value: Pre-filters outdoor large particles, reduces AC filter clogging, extends HVAC lifespan

IV.Clean Room Return Air Systems

Recommended Specs: G4 + High-density Non-woven Fabric + 500-1000 m³/h

Value: Reduces load on downstream HEPA filters, lowers clean room operation costs

Equipment Rooms (Generator/ Control Rooms)

Recommended Specs: Reusable Metal Mesh + 1500-2000 m³/h

Value: Washable for repeated use, fits high-dust/ high-ventilation needs of equipment rooms