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What is the difference between high efficiency filters without baffles and baffles?

2022-04-29 Page view : 59 views

High-Efficiency Filters are Divided into Non-Partition Filters and Partition Filters

 

1.) 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. Compared with the high-efficiency filter with partitions, under the same air volume, it has It has the advantages of light weight, small size, reliable performance and compact structure.

2.) The high-efficiency filter with partition is made of ultra-fine glass fiber as the filter material, aluminum platinum as the partition board, and glued paper, and is made of aluminum alloy frame or wood frame glue. Because of its relatively simple production, high quality and low price, widely used in clean workshops.

 

Dimensions Without and with Baffles:

 

HEPA filters are divided into actual size and nominal size. The nominal size refers to the size of the filter including the filter material and the outer frame, while the actual size generally only calculates the width, height, depth of the filter material and the area of ​​the filter material. Count the frame. Filters without partitions are often made: 50mm, 69mm, 90mm, and filters with partitions are generally made of two thicknesses of 150mm and 220mm. Baffle less filters are lighter and thinner compared to volume!

Production process without partition and with partition: 1. The high-efficiency air filter without separator generally requires the use of a fully automatic digital origami machine, which has higher requirements on production equipment, large dust holding capacity, low resistance, high production efficiency, and batch production. The production is cost-effective, so it will gradually replace the high-efficiency air filter with a partition and become the mainstream of the purification market!2. The manufacturing process of high-efficiency air filters with Seperator(H13 H14 High Efficiency Air Filter HEPA Filter with Seperator Manufacturer) is relatively simple. It can be produced by a few people in a workshop. The advantage is that the requirements for production equipment are low, but the disadvantages are also obvious. Low dust holding capacity, large resistance, and large volume, Low-cost performance and low production efficiency, the quality of different manufacturers in the entire high-efficiency air filter industry is uneven, and it is difficult to conduct unified inspection and management.

 

Efficiency Without and with Baffles:

 

1.) Compared with the filter of the same area, the air volume of the filter without partition is smaller than that of the filter with partition. If the partition is 320*320*220, the rated air volume is 500 cubic meters per hour, without partition the air volume of the filter 320*320*90 is only 300 cubic meters per hour.

2.) High efficiency H13 filtration efficiency: the filtration efficiency of ≥0.3μm particles is above 99.97% Sub-high efficiency H10 filtration efficiency: the filtration efficiency of ≥0.5μm particles is above 95% Medium efficiency F8 filtration efficiency: yes, the filtration efficiency of ≥1.0μm particles is above 80%, and the efficiency of separator filters is commonly used for H12, which is only effective for dust above 0.5um.

The efficiency of no separator can reach H13-U17, U17 is also known as ultra-efficient filtration efficiency: the filtration efficiency of ≥0.12um particles is 99.999997%. Relatively speaking, no partition filter is more efficient!

 

Advantages and Disadvantages of No Partition and Partition:

There are partitions for high efficiency, and paper and aluminum foil are mostly used to make a folded shape as a filter element separator to form an air channel. The divider is made of high-quality kraft paper, hot roll forming or using offset paper as the divider. Coated paper with double-sided glue is mostly used as the separator. The main purpose is to prevent the separator from shrinking due to the influence of cold, heat, dryness and humidity, thereby emitting particles.

 

However, according to the experience of the industry over the years, when the temperature and humidity change, this kind of separator paper may emit larger particles, resulting in unqualified clean room cleanliness test, suitable for various purification equipment and clean workshops and low-level of non-unidirectional flow items. For places with high cleanliness requirements, more suitable high-efficiency filters without partitions should be recommended for customers to use. Now Class A clean rooms generally use high-efficiency filters without partitions, and the FFU is also equipped with high-efficiency filters without partitions.

 

Compared with high-efficiency filters with partitions, under the same air volume, it has the advantages of light weight, small volume, reliable performance, compact structure, stable efficiency, easy installation, and uniform wind speed.

 

The efficient design without baffles can achieve the highest efficiency with the least resistance, thus reducing the running cost, especially the hot melt adhesive design can ensure the same fold spacing, ensure the passage of the best air flow, and at the same time achieve high dust holding capacity, prolong the long service life, making full use of the filter material over the entire depth of the filter.

 

In addition, the V-shaped channel without a baffle filter further improves the uniformity of dust holding and prolongs the filter life compared to the rectangular channel with baffle filter. Baffleless filters for ventilation avoid the use of metal parts, are easy to dispose of, and comply with increasingly stringent environmental requirements.