Clean room testing status can be divided into three categories

1, empty state facilities of the clean room all pipelines connected and running but no production equipment, materials and production personnel.

2, static has been built in all the facilities of the clean room installed in the production equipment and suppliers agreed by the owner of the way to test far turn, but no production personnel in the field.

3, dynamic facilities in accordance with the provisions of the way to run the state and the provisions of the personnel present in the prescribed manner of work.

Testing items: air velocity and air volume, air exchange, temperature and humidity, differential pressure, suspended particles, planktonic bacteria, settled bacteria, noise, illumination and so on. Specifically, you can refer to the clean room testing standards.

A series of experiments triggered by a phenomenon that doesn't comply with the theory
Theoretically, for the same filter, the higher the airflow, the lower the filtration efficiency.
However, our engineers found in the testing process, when the velocity of the wind is high to a certain value, the filtration efficiency no longer follows the rule of decreasing with the increase in air volume, but increases with the increase in air volume.
Later on, after we checked the related information from many sources, as well as communicated with the professionals in the industry and analyzed them, we considered the following possible reasons:
1) When tested in higher air volume, the filter element strength is not enough, the structure is damaged.
2) Filter materials with high filtration efficiency under high air volume do exist.

As we all know, the highest filtration efficiency level of high-efficiency filters can reach 99.999995 or more for different particle sizes of pollution. In the past, there are always people who correspond the level of clean room with the efficiency level of high efficiency filter, and always think that the more 9 high efficiency filters are used, the cleaner the clean room can reach the cleanliness of 100 or even 10 levels.
In fact, this concept is wrong, although the high efficiency filter is the core component of the clean room, but the clean room want to achieve 100 or even 10 levels of cleanliness, high efficiency filter is not the only condition.
There are many factors affecting the cleanliness level of clean room, such as the number of air changes, door and window sealing, and personnel entering and leaving the air shower room.

Activated carbon filter is made of activated carbon filter material, because the material is composed of meltblown and other filter materials and activated carbon together, and has a filtering effect on both particulate matter and gas compounds. Some manufacturers call it a double-effect filter.Activated carbon filters are used in a wide range of applications.
Such as home air purifiers to remove grease and smoke from kitchens, odors from restaurants, smells from pets, and harmful gases from outdoors. In HAVC, clean room, etc. They are used in conjunction with high efficiency filters to ensure the air quality inside offices and workshops to maintain human health and product quality. And as automotive air conditioning filters. Thus, how to make sure that you choose the proper filter media and filter?