Air filters are primarily used for the purpose of cleaning dirty air and toxic emissions from an industrial unit. They typically operate on the adhesive principle in which dust particles normally stick to the air filters. The air filters are made from adhesive substances which are wrapped around metals or other materials. Industrial air filters can be made of many types of materials including: acrylic, activated carbon, aluminum wire screen, electrostatic fabric, fiberglass, paper, polyurethane foam, polyester and poly/cotton non-woven materials.
Disposable filters are generally discarded after one use while reusable filters can be washed and used numerous times. Sometimes the filter material can be replaced while the frame of the filter is kept. Reusable filters can be washed for multiple uses. Air filters act as a great cleaning agent, but their effectiveness is greatly hampered if their pores are clogged. If this occurs it will result in a high level of maintenance.
Industrial air filters are usually high capacity as they filter large amounts of air particles at high airflows. Sometimes dirty air will prematurely clog air filters and several filters may be needed to do the job effectively. This will increase the costs of filtration so pre-filters are often used.
Industrial air filters are available in many different forms, these include: bag filters, box filters, fan filters, HEPA or ULPA filters, filter media, panel filters, disposable filters, reusable filters and pre-filters. They form an integral part of a compressed air filter or air purifier system. In a typical system, before the intake of air is made by compressors, it is passed through air filters to make sure that the quality of air is pure and that it doesn't contain any extraneous particles.
Air filters are used in a wide array of applications ranging from protecting expensive medical equipment to various industrial applications. However with advances in technology, air filtration techniques have undergone a sea of changes, with most air filters providing high quality and customized services.
There are a few important factors to consider when looking for industrial air filters. These include porosity, efficiency, filter length, filter height and filter width or ring size, and ply. Filter porosity is measured in ppi which means the average number of pores-per-linear-inch. A filter with an open cell has little air restriction while a fine celled foam filter provides maximum air filtration. Efficiency of the filter is its ability to remove a specific amount of particles of a specific size at specific airflow. Most household filters are one inch wide while commercially fitted filters are usually two inches. Most filters come in standard sizes and shapes. Round bag filters are specified in length and ring size. Ply means the layers of material contained in the filter.