What is the service life of the HEPA filter?

11/08/2020

    What is the service life of the HEPA filter? High-efficiency filters include high-efficiency filters with partitions and high-efficiency filters without partitions. High-efficiency filters with partitions include high-temperature-resistant high-efficiency filters and high-humidity-resistant high-efficiency filters.

    The HEPA filter without partition includes combined HEPA filter, HV type combined HEPA filter, a liquid tank without a partition HEPA filter, ultra HEPA filter, sub-high efficiency filter, ultra-low resistance without a partition HEPA filter, Knife holder type HEPA filter without partition, etc. Different HEPA filters, different service life.

    Sub-high-efficiency filters are divided into sub-high-efficiency filters with partitions and sub-high-efficiency filters without partitions: sub-high-efficiency filters with partitions include GK (sub-high-efficiency filters with partitions) and GKW (high-temperature-resistant sub-high-efficiency filters), GKA (high humidity resistant sub-high efficiency filter) and so on.

    The HEPA filter is a kind of air purification equipment, especially used in cleanroom workshops or aseptic rooms and other working environments. Guangzhou Zijing is a professional HEPA filter manufacturer with excellent quality.

    When there is too much dust on the high-efficiency filter, the resistance increases, and when it affects the normal air supply, the high-efficiency filter should be scrapped. Increasing the filtering area of ​​the HEPA filter or increasing the number of filters can prolong the service life of the filter.

    For a clean room in operation, the value of the end HEPA filter is not high, and all of them may be less than the user's two-hour output value, but the risk and indirect cost of replacing the filter will be high.

    When the filter is replaced, production must be stopped. Only the owner can calculate the loss of production. This loss is definitely higher than the cost of spare parts for the filter.

    High-efficiency filters are mainly widely used in the end filtration of civil or industrial clean places that require high cleanliness in electronics, semiconductors, precision machinery, pharmaceuticals, hospitals, food, and other industries.

    Replacing the filter is a very careful operation. Anything in the cleanroom cannot withstand the toss. If an inconspicuous device is damaged, the loss may be higher than the cost of all filters.

    After the filter is replaced, it must be inspected by professionals, and sometimes the air conditioning system must be debugged, and then a period of trial operation will be required.

    The three costs of testing, debugging, and trial operation may be the same as the price of the filter. Some owners always want to extend the service life of the high-efficiency filter as much as possible, not to save a little money on the filter, they want to avoid a lot of trouble caused by replacing the filter.

    For the HEPA filter, the installation direction must be correct: when the corrugated plate combination filter is installed in the vertical direction, the corrugated plate must be perpendicular to the ground; the connection between the filter and the frame in the vertical direction is strictly prohibited from leakage, deformation, damage, and leakage. After installation, the inner wall must be clean and free of floating dust, oil stains, rust, and debris. Inspection method: observe or wipe inspection with a white silk cloth.

    Before installing the high-efficiency filter, the cleanroom must be thoroughly cleaned and wiped. If there is dust in the purifying air conditioning system, it should be cleaned and wiped again to meet the cleaning requirements. If the HEPA filter is installed in the technical mezzanine or suspended ceiling, the technical floor or suspended ceiling should also be thoroughly cleaned and wiped.

    The transportation and storage of high-efficiency filters should be shelved in accordance with the direction marked by the manufacturer. During transportation, handle with care to prevent severe vibration and collision, and do not force loading and unloading.

    Before installing the high-efficiency filter, the package must be unpacked at the installation site for visual inspection, including whether the filter paper, sealant, and frame are damaged; whether the side length, diagonal and thickness dimensions meet the requirements; whether the frame has burrs and rust spots ( Metal frame); whether there is a product certificate and whether the technical performance meets the design requirements.

    Then check the method in accordance with the national standard "Code for Construction and Acceptance of Clean Room" [JGJ71-90], and install it immediately if it is qualified.

    High-efficiency filters used in cleanrooms with cleanliness levels equal to and higher than Class 100 should be leak-tested according to the methods specified in the "Code for Construction and Acceptance of Cleanrooms" [JGJ71-90] before installation and meet the specified requirements.

    When installing the high-efficiency filter, the arrow on the outer frame should be consistent with the airflow direction; when it is installed vertically, the direction of the filter paper creases should be perpendicular to the ground.