What are the general grades of laminar flow hoods?

1. Grade A laminar flow hood is the highest grade of laminar flow hood, with the best filtering effect and cleanliness. Its main function is to protect very sensitive experiments and manufacturing processes, such as microelectronic chip manufacturing. The filtering effect of the Grade A laminar flow hood is very good, which can effectively remove microorganisms and dust particles in the air so that the air quality can reach very high cleanliness requirements. Grade A laminar flow hoods usually use high-efficiency air filters with a filtering efficiency of more than 99.99%;

2. Grade B laminar flow hoods are medium-grade laminar flow hoods, suitable for some laboratories and manufacturing processes that do not require too much cleanliness. Class B laminar flow hoods have strong filtering capabilities, can reduce microorganisms and dust particles in the air, and keep the room relatively clean. Class B laminar flow hoods usually use high-efficiency air filters with a filtering efficiency of about 99.9%;

3. Class C laminar flow hoods are the lowest level of laminar flow hoods, suitable for some less sensitive laboratories and industrial manufacturing sites. Class C laminar flow hoods have relatively weak filtering effects and can only reduce a part of the microorganisms and dust particles in the air. Class C laminar flow hoods usually use ordinary air filters with a filtering efficiency of about 90%.

For the selection of the level of laminar flow hoods, we should determine it according to actual needs and the use environment. For some experiments and manufacturing processes with extremely high requirements for cleanliness, such as biomedical research and food processing, Class A laminar flow hoods should be selected. For some experiments and manufacturing processes with high requirements for cleanliness, such as electronic component manufacturing and medical laboratories, Class B laminar flow hoods can be selected. For some laboratories and manufacturing processes with low requirements for cleanliness, such as chemical laboratories and ordinary manufacturing processes, Class C laminar flow hoods can be selected.

In summary, the level of laminar flow hoods is divided according to their filtering effect, and different levels of laminar flow hoods are suitable for different laboratories and manufacturing environments. Choosing a laminar flow hood of the right level can improve the health and safety level of the working environment and ensure the smooth progress of the experiment and manufacturing process. As a laminar flow hood manufacturer, Bailun Purification produces 100-level laminar flow hoods made of 304 stainless steel, which are composed of fans, high-efficiency filters, electrical controls, and other components to provide laminar flow protection for the corresponding environment. The air inlet of the laminar flow hood can be at the top or side, in line with the new version of the GMP dynamic level 100, and the wind speed in the working area reaches 0.45m/s±20%. It is extremely widely used in the fields of medicine and biology, food processing, electronic manufacturing, chemical experiments, aerospace, etc.