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Frequently Asked Questions about High Efficiency Air Filters in Cleanroom Junior High Schools (2)

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Clean room junior high schoolHigh efficiency air filterWhat are the common problems? The editor of Shandong snyli Purification will give you a detailed introduction below:


1. Classification and performance comparison of elementary, middle and high efficiency filters?

Answer: The counting efficiency of atmospheric dust with a particle size equal to or greater than 5.0um20%And less than80%The filter is called the primary filter.

For particle size equal to or greater than1.0umThe atmospheric dust counting efficiency of particles is greater than or equal to20%And less than70%The filter is called medium-efficiency filter.

For particle size equal to or greater than0.3umThe atmospheric dust counting efficiency of particles is greater than or equal to99.99%The filter is called a high efficiency filter.

2. Fan filter groupFFUThe function and principle?

Answer: FFU laminar flow air supply unit can be connected in modules, makingFFUIt is widely used in clean rooms, clean workbenches, clean production lines, assembled clean rooms and laminar flow hoods.

The FFU is equipped with a two-stage filter screen with initial high efficiency. Fan fromFFUThe clean air sucked in from the top and filtered by the primary and high efficiency filters on the entire outlet surface0.45m/s+20%The wind speed is sent out evenly.

3. What are high-efficiency air outlets and integrated air outlets?

Answer: The shell of the high-efficiency air outlet is made of high-quality cold-rolled steel plate, the surface is electrostatically sprayed, and the static pressure box high-efficiency filter and diffuser plate are included. In the reconstructed and newly built clean room, it can be used as a terminal high-efficiency filter device in the clean shed. In other places, it has the advantages of low investment and simple construction.

The integrated air outlet filter is a closed structure, a low-profile, light-weight shell, and a high-efficiency filter in the middle. It has the best filtration performance and is connected to the air duct filter group, used for laminar and non-laminar flow grades from 100000 to10Class clean room. The closed design prevents internal voids and side leakage, and has passed the strict requirements for air quality in the clean room. Its low profile, light weight and disposable design make it suitable for hospital operating rooms, laboratories, pharmaceutical industry, microelectronics, film and food processing plants.

4. What is the current mixing ratio and standard dosage of high efficiency filters with and without partitions?

Answer: With or without partitions, the currently used sealant is A,BGlue, while other manufacturers use polyurethane glue.ABThe glue mixing ratio is

1:2, Its sealing performance is better, but once the proportion is out of balance, it will cause serious consequences, such as: the glue does not dry, or the glue bubbles, etc., causing the filter to be scrapped.

5. What is the standard size of the diagonal of the primary, medium, sub- and high-efficiency filters and the accepted deviation?

Answer: The standard diagonal of the primary, medium and high-efficiency filters is the sum of the squares of the two right-angle sides, and then the square: Find the standard size of the diagonal, that is, the standard diagonal. Generally, the allowable deviation of the filter is: for the filter larger than 700mm, the allowable deviation of the diagonal is less than or equal to4.5mm, And less than or equal to700mmFilter, the allowable deviation of the diagonal is less than or equal to2.3mm


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