Clean Room Primary, Medium, High Efficiency Air Filters Faq (1)

1. What is the actual size and nominal size of high-efficiency filters with and without clapboards?

The reason why the HEPA filter with or without clapboards is divided into actual size and nominal size is that the nominal size is a filter including the outer frame and filter material, while the actual size generally excludes the outer edge and only calculates the width, height, and size of the filter material. the depth and the area of the filter material.

2. What are the similarities and differences between HEPA filters with and without partitions?

High-efficiency filters can be divided into high-efficiency with partitions and high-efficiency without partitions.

The high-efficiency filter with clapboard is made of ultra-fine glass fiber as the filter material, glued paper, aluminum platinum as the partition plate, and glued with the wooden frame or aluminum alloy frame. It has high filtration efficiency, low resistance, and large air volume—advantages, widely used in various local purification equipment and clean workshops.

The high-efficiency filter without partition is made of ultra-fine glass fiber as the filter material and hot-melt adhesive as the separator. It is assembled with various outer frames, and the outer frame is beautiful. Small size, lightweight, compact structure, reliable performance, and other advantages.

3. What are the standard folding numbers, folding heights, and formula conversions of filter materials for high-efficiency filters with and without partitions?

The folded height of filter paper with partitions is generally 30mm~34mm shorter than the height of the nominal size. The folded number is mainly determined by the tightness of the separator paper and the assembly of the filter paper and the separator paper. The radian of the separator paper is calculated according to the standard. Generally, it is 4 mm, if it is less than 4 mm, the number of compartments with partitions will be more, and if the assembly is loose, the result is just the opposite. The tightness of the filter paper determines the folding height of the filter paper.

4. What are elementary, middle, high school, sub-high, and high-efficiency filters?

The primary filter is suitable for the pre-filtration of the air conditioning system, mainly used to filter dust particles above 5um. There are three styles of primary filters (folding, plate, and bag). The outer frame materials include paper frame, aluminum frame, and galvanized frame, and the filter materials include non-woven fabric, nylon mesh, activated carbon filter material, metal mesh, etc.

Medium-efficiency filters are widely used in the intermediate filtration of air-conditioning systems, mainly used to filter dust particles of 1um~5um, with the advantages of small resistance and large air volume. Medium-efficiency filters include bag type, frame type, and combined type.

High-efficiency filters are mainly divided into two types: filters with baffles and filters without baffles.

5. Classification and performance comparison of primary, medium, and high-efficiency filters?

For the atmospheric dust counting efficiency greater than or equal to 20% and less than 80% for particles with a particle size equal to or greater than 5.0um, the filter is called a primary filter.

A filter with a counting efficiency of greater than or equal to 20% and less than 70% for atmospheric dust particles with a particle size equal to or greater than 1.0um is called a medium-efficiency filter.

A filter with a counting efficiency of greater than or equal to 99.99% for atmospheric dust particles with a particle size equal to or greater than 0.3um is called a high-efficiency filter.

6. The function and principle of fan filter group FFU?

The FFU laminar flow air supply unit can be used in modular connections, making FFU widely used in clean rooms, clean benches, clean production lines, assembled clean rooms, and laminar flow hoods.

The FFU is equipped with an initial high-efficiency two-stage filter screen. The fan sucks in the air from the top of the FFU, and the clean air filtered by the primary and high-efficiency filters is evenly sent out on the entire air outlet surface at a wind speed of 0.45m/s+20%.

7. What are high-efficiency air supply vents and integrated air supply vents?

The shell of the high-efficiency air supply port is made of a high-quality cold-rolled steel plate, with electrostatic spraying on the surface, including a high-efficiency filter for a static plenum box, and a diffuser plate. It can be used as a terminal high-efficiency filter device in clean sheds, etc., and has the advantages of less investment and simple construction.

The integrated air supply filter is a closed structure, low profile, lightweight shell, and a high-efficiency filter is installed in the middle. It has the best filtration performance and is connected to the filter group of the air duct, which is used in the clean room of class 100000 to class 10 with laminar flow and non-laminar flow. The closed design prevents internal gaps and side leakage and meets the strict requirements of a clean room on air quality. Its low profile, lightweight, and disposable design make it suitable for use in hospital operating rooms, laboratories, the pharmaceutical industry, microelectronics, film, and food processing plants.

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

The sealants currently used for high-efficiency filters with or without partitions are A and B glues, and some manufacturers use polyurethane glue. The glue mixing ratio of A and B glue is 1:2, and its sealing performance is relatively good, but once the ratio is out of balance, it will cause serious consequences, for example, the glue will not dry, or glue bubbles will cause the filter to be scrapped.

Wuxi Lenge Purification Equipments Co., Ltd. is a professional manufacturer of purification equipment, our products are suitable for pharmaceuticals, laboratories, food and beverage, electronics, etc. We also have stainless steel furniture. If you are interested in purification equipment and stainless steel furniture, please contact us! You can contact us at 86-510-85189266. Or send an email to export@wxljjh.com.