KWS Paper Frame Primary Filter - Customized Air Purifier Filters from China Suppliers and Factory
Product Introduction
Product Characteristics
Inexpensive, lightweight and versatile, effectively reducing long-term system running costs.
The outer frame is made of cardboard, and the filter material is made of high quality polyester synthetic fibre with diamond mesh folding.
Compact structure, optimal for application as the first stage of filtration in standard ventilation systems.
Technical Parameters
| Model Name | Size (mm) | Rated Airflow | Efficiency | Initial Resistance | Suggested Ultimate Resistance |
|---|---|---|---|---|---|
| KWS-011 | 595*595*46 | 3000m³/h | G3 (30%) | ≦55Pa | ≦110Pa |
| KWS-012 | 295*595*46 | 1500m³/h | G3 (30%) | ≦55Pa | ≦110Pa |
| KWS-013 | 595*595*22 | 3000m³/h | G3 (30%) | ≦55Pa | ≦110Pa |
| KWS-014 | 295*595*22 | 15000m³/h | G3 (30%) | G3 (30%) | ≦55Pa |
Applications
Primary filtration for commercial and industrial ventilation and air conditioning systems.
Purification and filtration of general indoor ventilation systems.
Household air-conditioning purification equipment primary filtration.
Frequently Asked Questions (FAQ)
What particle sizes does the paper frame primary filter capture?
The paper frame primary filter is specialized in capturing large airborne particulate matter exceeding 5μm, including atmospheric dust, pet hair, pollen, and industrial debris.
How does this primary filter protect downstream filtration stages?
By effectively intercepting coarse dust and larger particulates as the initial barrier, it reduces the loading on secondary filters, extending the service life of downstream HEPA or activated carbon filters by up to 40%.
What is the recommended maintenance and replacement schedule?
For optimal performance and energy efficiency, users should adhere to a 3-month regular inspection cycle, replacing the filter when the ultimate resistance reaches approximately 110 Pa.
What efficiency ratings do these filters meet?
These primary air filters comply with international filtration standards, offering ratings in G3 (EN779) / MERV6 (ASHRAE 52.2) and G4 (EN779) / MERV8 (ASHRAE 52.2).
Is installation easy for non-technical users?
Yes. The lightweight, modular cardboard frame allows hassle-free replacement within minutes without specialized tools. Ensure proper airtight gasket alignment during insertion to prevent bypass leakage.
Where are paper frame primary filters commonly used?
They are widely utilized as pre-filters in commercial HVAC systems, electronics cleanrooms, pharmaceutical plants, commercial buildings, and household air purification units.



