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What is the difference between HEPA and ultra-HEPA filters?
What is the difference between HEPA and ultra-HEPA filters?High-efficiency filters and ultra-high-efficiency filters mainly have the following differences:Filtration efficiency High-efficiency filter: According to GB/T 13554-2008 "High-efficiency Air filter", the use of sodium flame method detection, filtration efficiency is not less than 99.9%; According to GB50472-2008 "Electronic industry clean room design Code", under the rated air volume, the efficiency of the most easily penetrated particle size method is more than 99.95%. Ultra-high efficiency filter: according to GB/T 13554-2008, the use of counting method detection, filtration efficiency is not less than 99.999%; According to GB50472-2008, under the rated air volume, the efficiency of the most easily penetrated particle size method is above 99.9995%. Filter particle size High-efficiency filter: mainly used to capture particles of dust above 0.3μm and a variety of suspended matter. Ultra-high efficiency filter: mainly used to filter dust particles greater than 0.1μm. Airflow resistance High-efficiency filter: According to GB50472-2008, the initial resistance of the airflow is below 220Pa. Ultra-high efficiency filter: according to GB50472-2008, the initial resistance of the airflow is below 250Pa. Detection method High-efficiency filter: Domestic testing is mainly based on GB/T 13554-2008 and other standards, detection methods include the sodium flame method, oil mist method, and counting method three, sodium flame method as the benchmark method. Ultra-high efficiency filter: efficiency is measured by the counting method. Application scenario High-efficiency filter: widely used in optical electronics, LCD liquid crystal manufacturing, biomedicine, precision instruments, beverage and food, PCB printing, and other industries' clean air conditioning end supply. Ultra-high efficiency filters: used in places with high cleanliness requirements, such as chip manufacturing lithography workshops, high-end biopharmaceutical aseptic production workshops, aerospace dust-free assembly workshops, and some laboratories requiring high-precision scientific experiments. Cost and price High-efficiency filter: Compared with ultra-high-efficiency filters, the production process and material requirements are relatively low, and the cost and price are relatively low. Ultra-high efficiency filter: Because of its extremely high requirements for filter materials, manufacturing process, and quality control, production is difficult, so the cost and price are usually much higher than the high-efficiency filter. |
