The filter medium of the HEPA filter is pleated fiberglass paper with a characteristic fiber size and their proper distribution depending on the filtration class. The method of pleating material used means that we increase in this way filter surface and airflow velocity. The whole is placed in the metal frame (galvanized, aluminum, stainless steel) or MDF (depending on customer demand). The filters have special hotmelt or aluminum separators, whose task is to keep pleats at equal distances. The separators are accordingly selected in terms of the environment in which the air filter will work, e.g. for the environment in which oil mist will occur, the appropriate selection is the separator
aluminum, while in the operating room we can use hotmelt separators.
– Sealing with a polyurethane gasket (one or two-sided)
– Metal housing (zinc, aluminum, stainless steel) or MDF
– One or double-sided metal protective mesh, painted white
– Filter material – glass fiber
– Hotmelt or aluminum separators
– Turbulent or laminar flow
HEPA filters according to EN1822-1: 2009 are divided into three groups:
EPA – these are effective air filters, they are marked with the letter E (E10-E12),
HEPA – a highly effective air filter, marked with the letter H (H11-H14),
ULPA – literally translated air filters with very low penetration, i.e. those with the highest efficiency of all HEPA filters (U15-U17).