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Kelan Xinxin: The Brand Power Behind a Trusted Filter
Kelan Xinxin has grown into a trusted filter brand by combining professional-grade quality, broad product compatibility, fair pricing, and reliable service.
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Inertial Impaction in Air Filters: Why Small Particles Are Captured
Inertial impaction captures particles that cannot follow airflow as it bends around filter fibers, causing them to strike and adhere to the fibers.
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Can Filters Capture Particles Smaller Than Their Pores? Understanding Interception
Direct interception captures particles smaller than the gaps between filter fibers when their airflow path brings them into contact with a fiber surface.
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Matching Activated Carbon Pore Structure to Formaldehyde Adsorption
Effective formaldehyde adsorption depends on a balanced pore structure: 0.5–2 nm micropores provide capacity, while mesopores support diffusion and macropores reduce resistance.
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How HEPA Filters Perform Against Viruses of Different Sizes
HEPA filters capture viruses through diffusion, interception, impaction, and electrostatic attraction, including viruses carried in respiratory droplets and aerosols.
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How Pore Size Is Designed in Pre-, Medium-, and High-Efficiency Filters
Filter pore sizes are graded to match pollutant sizes while balancing efficiency, airflow resistance, service life, and cost across each filtration stage.
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[Standards News] Revision of QB/T 5365 for Air-Purifier Filters Officially Launched
On January 14, 2025, industry representatives met in Hefei to launch the revision of QB/T 5365, the standard for filter-type air-purifier filters.
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What Do Pre-, Medium-, and High-Efficiency Filters Do?
A three-stage system uses pre-filters for large debris, medium-efficiency filters for intermediate particles, and HEPA filters for fine pollutants.
![[Standards News] Revision of QB/T 5365 for Air-Purifier Filters Officially Launched](http://img.wds168.cn/comdata/73497/202507/20250726170312c3b658.png "[Standards News] Revision of QB/T 5365 for Air-Purifier Filters Officially Launched")
Company landline
010-60770969
Sales Phone/WeChat: 15601000090
Purchasing Management/WeChat: 13331060986
Company Phone: 010-60770969
Address: Room 1708, Building B, Jinyu International Center, Longyu East 1st Road, Huilongguan Street, Changping District, Beijing
©2026 Kelan Filtration Technology(Beijing) Group Co., Ltd. All rights reserved
Record Number: Jing ICP No. 2022016037-2
Technical Support: Suyuan Network
Sales Phone/WeChat: 15601000090
Purchasing Management/WeChat: 13331060986
Company Phone: 010-60770969
Address: Room 1708, Building B, Jinyu International Center, Longyu East 1st Road, Huilongguan Street, Changping District, Beijing
©2026 Copyright Beijing Kelan Fresh Air Technology Co., Ltd. All rights reserved
Record Number: Jing ICP No. 2022016037-2
Technical Support: Suyuan Network
