Classification and Characteristics

Plastic frame combined medium-effect filters can be classified into F6 to F9 according to the filtration efficiency level, and different levels of filters can be selected according to different application requirements. It is characterized by high air volume, low resistance, high dust capacity and other advantages, and is easy to clean and replace, and can adapt to different environmental conditions.

Working Principle

The main function of the plastic frame combined medium efficiency filter is to capture dust particles of 1-5um, and its working principle is based on physical filtration, intercepting airborne particles through specific filter materials, such as non-woven fabrics or glass fibers. The pleated structure inside the filter increases the filtration area and improves the filtration efficiency, as well as ensures lower air resistance and higher dust holding capacity.

Application Cases

Plastic frame combined medium-effect filters have a wide range of applications in pharmaceutical, hospital, electronics, food and other industries. In these industries, filters serve as key equipment for air purification, ensuring the cleanliness and safety of the production environment. For example, in hospital operating rooms, the use of such filters can effectively reduce the spread of bacteria and viruses and ensure patient safety.

Maintenance Steps and Precautions

Things to keep in mind when maintaining plastic-frame combined medium-effect filters include regular cleaning of the filter to remove accumulated dust, and checking the sealing performance of the filter to ensure that there are no leaks. In terms of the replacement cycle, it is generally recommended to replace the filter every 3 months to 1 year, depending on the environment and usage. In addition, it is also necessary to pay attention to the storage environment of the filter to avoid humidity and sunlight.

Filtration Efficiency Standards

According to EN 779 standard, medium efficiency filters are categorized into different levels, including F5, F6, F7, F8 and F9. Specifically, the particle capture efficiency of F5 grade filters is not less than 40%, F6 is not less than 60%, F7 is not less than 80%, F8 is not less than 90% and F9 is not less than 95%. In addition, there are higher standards of filtration efficiency such as M6 and M8. The particle capture efficiency of M6 can reach 99.999% or more, capable of capturing particles larger than 0.3 microns; the particle capture efficiency of M8 can reach 99.9999% or more, capable of capturing particles larger than 0.1 microns.

Wind resistance standard

Wind resistance is one of the key indicators for evaluating the performance of medium efficiency filters. Generally, the initial wind resistance is around 50 Pa, and the final wind resistance should not exceed 350 Pa. This design aims to ensure that the filter can still maintain a low operating resistance under high load conditions, thus reducing energy consumption and prolonging service life.

Structure standard

The structural design of the plastic frame combined medium efficiency filter has a significant impact on its performance. An optimized filter structure should have good sealing performance to reduce the air permeability of flying dust and reduce the possibility of trapping flying dust. In addition, the filter design should take into account the need for easy installation and maintenance, as well as stability under high airflow conditions.