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Kelan Core utilizes American Prafy product solutions
Purafil: A Leader in Gas Phase Filtration. Since its founding in 1969, Purafil, an American company, has been deeply involved in the field of gas phase purification. With over fifty years of technological accumulation and innovation, it has become a global leader in gas phase filtration technology.
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Kelan Core uses custom-grade Toray filter paper, highlighting its superior product strength.
Toray Industries is a globally renowned materials company, founded in Japan in 1926. Its business spans fields such as fibers, high-performance chemicals, carbon fiber composites, environmental engineering, and life sciences, achieving remarkable results in materials innovation and production, particularly in the field of carbon fiber.
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How many grades are there for air filters, such as H12?
Air filter classification is mainly based on international standards, with the core indicator being the filtration efficiency of particles of a specific size. Common classification systems and key grades are as follows: 1. European EN 1822 standard (most commonly used). This is for high-efficiency filters (HEPA filters).
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How are the filtration efficiency levels of high-efficiency filters classified?
The classification of HEPA filter filtration efficiency levels is mainly based on international and domestic standards. The core principle is to define the filtration efficiency for particles of a specific size. Common standards and levels are as follows: International Standard (ISO 16890) is based on filtration efficiency for PM1, PM2.5 ...
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Common Materials and Working Principles of High-Efficiency Air Filters
High-efficiency air filters remove particles of 0.3 μm and larger. Learn about common media, frames, seals, and the main filtration mechanisms.
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Removing Formaldehyde from a New Home: Why Composite Filters Work Best
Formaldehyde can off-gas for years after renovation. Composite filters combine rapid adsorption with chemical decomposition for more reliable long-term removal.
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How to Choose a Pre-Filter for a Home Air Purifier
Choosing the right pre-filter extends the life of the main filter and improves purification. Focus on material, structure, and ease of maintenance.
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Multi-Industry Applications of Pre-Filters
Pre-filters capture large particles in residential, commercial, industrial, and specialized environments, with designs tailored to each setting.
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
