What Is ULPA Filters

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What Is ULPA Filters


Maybe you've heard of HEPA-High-Efficiency Particulate Air Filter, but do you know what UPLPA is. Equipping with HEPA & ULPA Filters in high cleanliness places is necessary. What is ULPA filter? Actually ULPA is an acronym for "ultra-low penetration air", whose working efficiency even higher than HEPA. Now let's get a brief learning about ULPA filter.

ULPA (Ultra Low Penetration Air) filters with higher cleaning level were developed in the 1970s. A ULPA filter can remove at least 99.999% of particles 0.12 μm in diameter, such as dust, pollen, mold, bacteria and any airborne particles. ULPA filter is specially designed for use in cleanrooms and precision assembly areas.

What is ULPA filter? ULPA filters resemble HEPA-filters in their construction. The construction of a ULPA filter consists of a very thin and dense filter material folded into a wooden or metal frame. The filter material catches particulates of dust from the air that penetrates it. High filtering ability is achieved by very low speed at which the air penetrates the filter material. Maximal speed cannot exceed 0.025 m/s. To achieve sufficient air speed through the face of the filter, it is necessary to fold the filtering material into the cassette as tightly as possible, but at the same time it should be noted that the filter resistance would not become too high. In a standard filter cassette in size 610 x 610 x 292 mm has c.a. 20 m2 of filter material. The most used material is glass cloth, but also different fabrics of synthetic fiber can be used.

What is ULPA filter? The main difference between HEPA and ULPA is in higher level of cleaning. It is recognized that ULPA work more efficiently than HEPA. The filtration class of HEPA filters is from EU (energy unit) 10 to EU 14, and then from EU 15 to EU 17 there are ULPA filters. The ULPA filter unit of the present invention has the further advantage of avoiding many previous deficiencies in HEPA and ULPA filter units, such as filter contamination from shedding particles and/or out-gassing, and limitations on chemicals to which the filter can be exposed without deterioration. As a result, the present invention provides a cleaner and more durable filter that can be used to address growing contamination problems in many different industries, such as electronics and pharmaceuticals. With this Filter the air can be purified of the smallest particles, even viruses.

We hope all the information above is useful to you. Now you may understand what UPLA is. If you are in need of ULPA, you can visit www.hefilter.com for more information.