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KWS Primary Effect Panel Folding Air Filter
Product Introduction
Primary filters: the first line of defence in air purification
As the critical first-stage defense in air purification systems, primary filters employ mechanical filtration to capture airborne contaminants exceeding 5 microns, including particulate matter, lint strands, fibrous debris, and allergenic pollen grains. Positioned at the filtration sequence forefront, these pre-filters strategically safeguard downstream precision filtration components (particularly HEPA modules) from premature particulate overload, thereby optimizing system longevity through reduced maintenance frequency and enhanced energy efficiency.
In industrial workshops, commercial buildings and domestic air conditioning, the need for primary filters is reflected in three ways:
1. Economy: This strategic pre-filtration solution achieves 60-80% particulate retention efficiency for ASHRAE-defined coarse particulates (≥3μm), thereby minimizing operational downtime for downstream HEPA/ULPA filter maintenance cycles. The optimized performance translates to measurable cost savings through extended filter lifespan management and reduced consumables expenditure;
2. Efficiency guarantee: This engineered clogging mitigation mechanism effectively blocks particulate ingress (≥5μm) at the primary filtration interface, preserving structural porosity of HEPA-grade filtration media. Through sustained particulate load management, the system ensures ±2% airflow differential pressure stability and >99% contaminant removal efficacy retention over 10,000 operational hours;
3. Widely applicable: washable or replaceable metal mesh, chemical fibre materials are suitable for scenes with high dust concentration (e.g. building ventilation, factory pre-treatment).
According to statistics, without the installation of primary filter purification equipment, high-efficiency filter element life shortened by more than 40% on average. Whether it is to protect precision instruments or to improve indoor air quality, primary filters have become an indispensable cornerstone of modern air management with their low-cost and cost-effective features.
Product Characteristics
1. Cheap, light weight, good versatility, reduce operating costs;
2. The outer frame is made of galvanised frame or aluminium frame, and the filter material is made of high-quality polyester synthetic fibre attached with rhombic mesh or welded wire mesh folded and shaped.
3. Compact structure, commonly used in the ventilation system of the first level of filtration.
4. It is also suitable for air-conditioning and ventilation system which only needs one level of filtration.
Filter efficiency
G3(EN779), MERV6(ASHRAE52.2)
G4(EN779), MERV8(ASHRAE52.2)
Technical Parameter
| Size | Rated airflow | efficiency | initial resistance | Suggested ultimate resistance |
| 595*595*46 | 3000m³/h | G4(35%) | ≦55Pa | ≦110Pa |
| 295*595*46 | 1500m³/h | G4(35%) | ≦55Pa | ≦110Pa |
| 595*595*96 | 3800m³/h | G4(35%) | ≦55Pa | ≦110Pa |
| 295*595*96 | 1900m³/h | G4(35%) | ≦55Pa | ≦110Pa |
Special sizes and specifications can be made according to customer requirements.
Applications
1. Pre-filtration of general air-conditioning and ventilation systems to avoid the accumulation of dust and pollution within the system.
2. Pre-filtration of large air compressor.
3. Centralized ventilation and air-conditioning systems and return air filtration in clean rooms to prolong the service life of high-efficiency filters at the back stage.
4. Pre-filtration of general industrial plant ventilation system to achieve general clean air requirements.
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