The accuracy grade standard of compressed air filters covers different levels from coarse filtration to ultra-fine filtration to meet various application requirements. These levels generally include:
Coarse filtration: The filtration accuracy is usually in the range of 25μm to 100μm, mainly used to remove larger particles such as dust and particulate matter. This level of filter is often used for pre-filtration of air compressors to protect finer filters.
Fine filtration: The filtration accuracy is usually in the range of 1μm to 25μm, used to remove smaller particles and solid particles. This level of filter is often used to provide cleaner air to meet specific application requirements, such as food processing and pharmaceuticals.
Ultra-fine filtration: The filtration accuracy is usually in the range of 0.01μm to 1μm, used to remove tiny particles, including bacteria, viruses and tiny particles. This level of filter is often used in high-demand applications, such as electronic manufacturing and health care.
In addition, the accuracy levels of compressed air filters include P-level (pre-coalescing filter, filtration accuracy 3μm), U-level (general filter, filtration accuracy 1μm), H-level (precision filter, filtration accuracy 0.01μm), S-level (oil removal filter, filtration accuracy is 0.01μm) and C-level (activated carbon deodorization filter, filtration accuracy 0.001mg/m³). The accuracy levels of these filters are selected according to the needs of the application, and usually the appropriate filter level needs to be selected according to the properties of smoke, particulate matter and liquid droplets.