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  2. Media filter - Wikipedia

    en.wikipedia.org/wiki/Media_filter

    A media filter is a type of filter that uses a bed of sand, peat, shredded tires, foam, crushed glass, geo-textile fabric, anthracite, crushed granite or other material to filter water for drinking, swimming pools, aquaculture, irrigation, stormwater management, oil and gas operations, and other applications. Each layer of media is designed to ...

  3. HEPA - Wikipedia

    en.wikipedia.org/wiki/HEPA

    HEPA filters, as defined by the United States Department of Energy (DOE) standard adopted by most American industries, remove at least 99.97% of aerosols 0.3 micrometers (μm) in diameter. The filter's minimal resistance to airflow, or pressure drop, is usually specified around 300 pascals (0.044 psi) at its nominal volumetric flow rate.

  4. NIOSH air filtration rating - Wikipedia

    en.wikipedia.org/wiki/NIOSH_air_filtration_rating

    These HE-marked filters are 99.97% efficient against 0.3 micron particles and are oil-proof, and therefore their filter-media material has the exact same specification as a P100 filter. [9] [10] [11] Since filters are tested against the most penetrating particle size of 0.3 μm , an APR with a P100 classification would be at least 99.97% ...

  5. American Standard Brands - Wikipedia

    en.wikipedia.org/wiki/American_Standard_Brands

    Website. americanstandard-us .com. American Standard Brands is a North American manufacturer of plumbing fixtures, based in Piscataway, New Jersey, United States. It is principally owned by the Lixil Group, with Bain Capital Partners holding a minority stake. The company was formed as American Standard Americas from the North American ...

  6. Median filter - Wikipedia

    en.wikipedia.org/wiki/Median_filter

    The median filter operates by considering a local window (also known as a kernel) around each pixel in the image. The steps for applying the median filter are as follows: Choose a window of a specific size (e.g., 3x3, 5x5) centered around the pixel to be filtered. For our example, let’s use a 3x3 window.

  7. Depth filter - Wikipedia

    en.wikipedia.org/wiki/Depth_filter

    Rates of removal for pressurized sand filters with media typically in the range of 0.3- 0.5 mm have been reported to be at 95 of particles as small as 6 μm with media size of 0.3 mm and 95% removal rate of particles as small as 15 μm for media size of 0.5 mm. Filter media. There is a variety of filter media that can be employed in depth ...

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