What are the general grades of laminar flow hoods?

1. Class A laminar flow hood is the highest level laminar flow hood, with the best filtration effect and cleanliness. Its main role is to protect very sensitive experiments and manufacturing processes, such as microelectronic chip manufacturing. The filtration effect of the Class A laminar flow hood is very good and can effectively remove microorganisms and dust particles in the air, making the air quality meet very high cleanliness requirements. Class A laminar flow hoods usually use high-efficiency air filters, with a filtration efficiency of more than 99.99%;

2. Class B laminar flow hood is a medium-level laminar flow hood, suitable for some laboratories and manufacturing processes that do not have high cleanliness requirements. Class B laminar flow hoods have strong filtration capabilities, which 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 filtration efficiency of about 99.9%;

3. Class C laminar flow hood is the lowest level of laminar flow hood and is suitable for some less sensitive laboratories and industrial manufacturing sites. The filtration effect of the C-level laminar flow hood is relatively weak 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 filtration efficiency of about 90%.

The grade selection of the laminar flow hood should be determined based on actual needs and usage environment. For some experiments and manufacturing processes that require extremely high cleanliness, such as biomedical research and food processing, Class A laminar flow hoods should be selected. For some experiments and manufacturing processes that require higher cleanliness, such as electronic component manufacturing and medical laboratories, you can choose a Class B laminar flow hood. For some laboratories and manufacturing processes that do not have high requirements for cleanliness, such as chemical laboratories and general manufacturing processes, you can choose Class C laminar flow hoods.

To sum up, the grades of laminar flow hoods are divided according to their filtration effects. Different grades of laminar flow hoods are suitable for different laboratory and manufacturing environments. Choosing an appropriate grade of laminar flow hood can improve the health and safety level of the working environment and ensure the smooth progress of experiments and manufacturing processes.