Low resistance initial effect paper frame air filterProduct Structure and Materials

1. Outer frame material

Made of moisture-proof and water-resistant wood fiber paperboard, it has high strength characteristics and is not easily deformed, broken or twisted under normal operating environment -1-7

Fix the filter material diagonally in front and back of the paper frame to ensure a tight bond between the filter material and the outer frame, preventing any airflow leakage -5-7

Common thickness specifications: 20mm (1 '), 46mm (2'), 96mm (4 ') and other options -2

2. Filter material

Mainly using polyester synthetic fibers or non-woven fabrics as filter materials-4-9

The filter material is treated with needle piercing technology to form a gradually layered structure, which has a high dust capture capacity and a long service life of -5

Moisture resistance is achievable, suitable for high humidity environments -4-5

Adhesive metal mesh on the air outlet surface to prevent vibration and ensure consistent folding spacing -5

3. Structural design

The filter material is folded and packed into high-strength die cut cardboard, with a filtration area 2-5 times that of a flat filter

The folding structure effectively increases the windward area, allowing the airflow to pass smoothly and evenly -1-9

IIILow resistance initial effect paper frame air filterProduct features and advantages

Characteristic dimensionSpecific advantages

Filtering performanceFilter dust particles larger than 5 μ m, and the efficiency of the weighing method can reach 90% -93% -1-6%

running resistanceThe initial resistance is as low as 18-70Pa (depending on specifications and air volume), saving system energy consumption by -2

Dust holding capacityLarge dust holding capacity, long service life, reduced replacement frequency -1-2

structural strengthThe outer frame is sturdy and moisture-proof, not easily deformed, ensuring long-term stable operation -1-6

economyDisposable design, no need for cleaning and maintenance, low overall cost of use -4-7

compatibilityGood universality, no need to change the original air conditioning box design, can be directly replaced -1

Efficiency level description:

G3 level: Average efficiency (colorimetric method) 30% -35%

G4 level: Higher average efficiency (colorimetric method), in compliance with EN779-4-6 standard

4、 Technical performance parameters

1. Conventional specifications and performance parameters -2-6-8

Actual size (mm)thicknessFilter area (m ²)Rated air volume (m ³/h)Initial resistance (Pa)Efficiency Level

595×595×4646mm（2'）1.75340060-70G3/G4

595×290×4646mm（2'）0.851500-170045-68G3/G4

594×594×9696mm（4'）2.66340068G4

595×595×2020mm（1'）0.88238070G3/G4

2. Operating conditions

Suggested final resistance: ≤ 225Pa-2

Moisture resistance: ≤ 90% -2

Maximum operating temperature: 80 ° C-4

Suggested wind speed: 350FPM (approximately 1.78m/s) -5

5、 Application scenarios

1. Building ventilation field

Air conditioning and central ventilation system primary filter -2-8

Pre filtration of ventilation systems in public places such as office buildings, shopping malls, airports, etc. -6

Subway ventilation system filter -10

2. Industrial and clean fields

Pre filtration of large air compressor -2-8

Program controlled switch and computer room dedicated constant temperature and humidity air conditioning -1-3

Cleanroom return air system and FFU inlet pre filtration -6-10

Pre filtration of HEPA/ULPA high-efficiency filtration device prolongs the lifespan of the back-end high-efficiency filter -1-6

3. Special applications

Spray painting system, spray painting workshop pre filter -6

Coarse filtration of factory exhaust gas and processing dust collection