There are many types of industrial air filtration equipment including Indoor Clean Air Systems, Scrubbers, Dust Collectors and Fume Hoods.
Sometimes packaging and manufacuring operations require the surrounding air to be free of contaminants. In those cases filters such as HEPA filters are used to clean the air. Clean air chambers can built around a machine or, sometimes, they are entire rooms.
A high-efficiency particulate arrestance filter, or HEPA filter is designed to remove 99.97% of particulates that are 0.3 micrometers in size. They are rated by the US Department of Energy. HEPA filters are commonly constructed of fiberglass fabric. They are so efficient, they can keep out bacteria, viruses and allergens. Clean chambers and clean rooms are sealed so that the only air that can enter come through the HEPA filter. Workers are often required to scrub down and wear special clothing before entering a clean room so they do not contaminate the product with dirt on their bodies or clothes.
Manufacturing operations that produce dust but do not need HEPA filtered air have dust collectors. A dust collector is similar to a vacuum cleaner. It has a filter or chamber that captures flying dust and particulate. Small dust collectors are often rectangular in shape while larger dust collectors are conical in shape. These are called cyclones. They are often mounted outside the plant to shield the plant from the noise of the vacuum.
Sometimes, industrial operations, especially lab operations create fumes. In those cases, a fume hood is called for. The fume hood, as its name implies, is placed over the operation that creates the fumes and often looks rather like the hood over a the grille in a restaurant. Air is sucked to the back of the fume hood through a perforated wall and is drawn down so that particulate falls to the bottom. Then it is drawn up through a filter at the top that captures the fumes before the air is pushed outside.
Industrial operations that create air pollution require air scrubbers. Air scrubbers are also called negative air machines. They are filtration systems that remove particles, gasses, and/or chemicals from the air within a given area. The air can be filtered and either returned to the interior space or ducted to the outdoors.
Clean Rooms are produced by companies such as Clean Air Products, Cambridge, Guard Tech and Sericor. Dust collectors are produced by companies such as Donaldson/Torit, Oneida and Micro Air. Fume Hoods are produced by companies such as Cole-Parmer, Labconco and BBF Technologies. Air scrubbers are produced by companies such as Jon Don and Nikro.
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