HEPA filters with separators are mainly used to filter tiny dust particles and various suspended matter. The primary raw material for manufacturing these filters is ultra-fine glass fiber paper (as the filter media), paired with separator materials like offset paper or aluminum film. They are bonded with wooden frames or aluminum alloy frames. Each filter undergoes a flame test, ensuring high filtration efficiency, low resistance, and large dust-holding capacity.
HEPA filters with separators are widely used at the air supply terminals of air conditioning systems in clean environments across industries such as optoelectronics, LCD manufacturing, biomedicine, precision instruments, food and beverage, and PCB printing. They are primarily applied at the terminals of cleanrooms and in various purification equipment. Based on their structural design, HEPA filters can be categorized into types including HEPA filters with separators, HEPA filters without separators, high-airflow HEPA filters, and ultra-high-efficiency filters. The key difference between HEPA filters with and without separators lies in their manufacturing processes and the design of the separators.
Advantages of HEPA Filters with Separators
Large Dust-Holding CapacityThese filters offer exceptionally high filtration efficiency and low resistance, allowing them to trap large amounts of dust. Additionally, they ensure uniform airflow distribution.
Shorter Fold HeightThe actual fold height of the filter paper in HEPA filters with separators is typically slightly shorter than the nominal size. The number of folds depends on two factors: the separator paper and the tightness of the assembly between the filter paper and separator paper. The standard arc of the separator paper is 4mm — if the arc is less than 4mm, the number of separators (and thus folds) increases; conversely, loose assembly reduces the number of folds. By contrast, the number of folds in HEPA filters without separators is determined mainly by the fold height of the filter paper and its tightness.
High Filtration EfficiencyHEPA filters with separators can selectively adsorb pollutants. When activated carbon is integrated (for specific models), the adsorbed particles react with the carbon to form solid substances and harmless gases — a process known as chemical adsorption. For particles passing through the fiber layer, gravity causes larger particles to settle on the fiber surface as they move. While this gravitational effect is negligible for filtering tiny particles (since their small size means gravity has little impact, and they follow the airflow through the fiber layer), the overall filtration efficiency remains high for most target contaminants.
The above covers the key features and advantages of HEPA filters with separators. We hope this introduction is helpful for those seeking to learn more about these filters.
