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Why does the air shower need to install primary and high-efficiency filters?

Why does the air shower need to install primary and high-efficiency filters?

    I believe that friends who know the air shower room know that in fact, the air shower room must be equipped with a primary filter and a high-efficiency filter to achieve a high dust removal effect. The air shower room is equipped with a voice prompt system, which automatically The voice system prompts people to complete the entire blowing and dust removal process in an orderly manner to achieve an effective purification effect. The clean air flow filtered by the high-efficiency filter is sprayed onto the body from all directions by the rotatable nozzle, effectively and quickly removing dust particles. The dust particles are filtered by the primary and high-efficiency filters and then recirculated into the air shower area.
    Everyone needs to know that the high-efficiency filter of the air shower room is generally replaced once a year. The primary filter of the air shower room is replaced every 6 months. If the wind speed still cannot be increased, it means that the high-efficiency filter has been installed. You should confirm the arrow mark on the high-efficiency filter. The arrow should point in the direction of airflow.
    If it is found that the wind speed in the air shower room has become smaller, first we need to check whether the surface of the primary air filter is black. If it is black, it means that the pre-filter contains more dust and the resistance increases, that is, the inner part of the primary air filter should be removed. Clean or replace the non-woven fabric.
    The air shower primary filter is an effective device for purifying people and materials and preventing outdoor air from invading the clean area. It has strong versatility and can be used with all clean rooms and clean factories.