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General information about air cleaning filters

Electrostatic filters

Electrostatic air filtersElectrostatic filters became widely used due to the high degree of capturing of the most hazardous particles with size from 5 to 0,01 micron and smaller, and now they are being used in various fields of industry.

Electrostatic filters are being efficiently used for cleaning the air from small particles of different types of smoke and dust, vapours of liquid cooling mixtures, oil mist / aerosol and emulsion fog, with size down to 0,01 micron. At this, cleaning efficiency of the filter can reach up to 99%. Such agents of diseases as microbes, viruses, bacteriums, fungies and other vermins simply die in electrostatic field of the filter.

The main principle of air cleaning in electrostatic filter is as follows: polluted air flow passes through prefilter, which separates large particles. The rest of the particles are being charged in electrostatic field of the ionizer cell and fall on to the negatively charged plates of precipitator cell. At this stage, particles with size down to 0,01 micron are being captured.

Cleaning efficiency of electrostatic filter depends on the speed, at which the polluted air passes through the filter, and size of particles in this air flow. At this, the less is the air flow, the higher is the cleaning efficiency. Recommended values of air flow through the filter and corresponding cleaning efficiency are presented in technical information for the units.

Main filtrating elements of electrostatic filter are washable. There is no need in regular change of those and they can be used during several years, which is definite advantage.

Bag filters

Bag filtersOffered bag filters are being used for cleaning the polluted air from different types of dust and smoke, formde during welding of zinc-coated steel, aluminum, stainless and galvanized steel, soldering and spot welding.

Mechanical filters are ideal for removal of oil mist / aerosol, emulsion fog, vapours of liquid coolant mixtures, formed during various types of metal processing.

Mechanical filters offer a high cleaning efficiency for particles with size down to 0,1 micron.

Working principle is as follows: polluted air flow passes through the prefilter, which separates large particles. After that, air flow passes through the fine filter with large active filtering surface. This filter captures the particles with size down to 0,1 micron.

Cartridge filters

Cartridge filtersCartridge filters are being widely used in all fields of industry due to low operating costs and possibility to create a highly efficient filter at minimal pressure loss.

Cartridge filters offer a high cleaning efficiency for dry particles of different types of dust and smoke with size down to 0,1 micron and less. Cleaning efficiency of the filter reaches 99,9% in the whole range of stated particle sizes.

Filtration principle is as follows: incoming flow of polluted air passes through the inlet and is being evenly spread by the air distributing piece, providing the protection of cartridge from the sparks and the most efficient passing of air flow through the filter. After that, air flow evenly passes through the filtering cartridge surface, which capture the parts with size down to 0,1 micron.

Filtering cartridges have long service life and rarely need to be changed. Depending on the type of pollutant, the filtering cartridge can be made of different type of material.

Particle sizes of typical pollutants

Type of pollutantRange of particle sizes,
(micron)
Welding fume5-0,01
Soldering fume2-0,01
Tobacco smoke1-0,01
Smoke from rubber0,5-0,01
Oil smoke1-0,01
Viruses0,1-0,01
Oil deposit1-0,01
Oil mist100-1
Pollen100-10
Hair100-50
Carbon dust100-1
Flour100-5
Cement dust70-1
Colouring pigment5-0,1
Aerosol5-0,01
Bacteria, fungus50-0,5
 
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