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Help CenterThe Function Of Air Filter For Fabric Ductwork
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Sometimes we may use air filter for DurkeeSox fabric ductwork, FAF(fabric air filter) is unique component of DurkeeSox fabric air duct system and used to increase cleanliness of indoor air and effectively extend time interval of system cleaning and maintenance.Fabric in filter material make airflow bypass and cause small resistance. When filter is not installed, air supply pressure reaches maximu;when length of filter increased,pressure in air duct gradually decreases.Below chart is resistance schematic with and without filter. As can be seen from figure,when length of filter is four times of diameter, the decreasing trend of resistance is already very gentle.Filter generate to airflow, resistance caused by new filter called intial resistance correspondingly resistance caused by obsolete filter called final resistance. When filter is covered by dust, resistance; the dirtier filter is, the quicker resistance increases. When resistance increases to a specified value, it will make air volume of air-conditioning systems sharply decrease. Moreover due to big gap among the fabric, too big resistance is possible to blow the dust away in the filter. At this time resistance no longer increases but filtration efficiency decreases to zero. Therefore when final resistance reaches in 0.4 to 0.8 in w.g., filter should be cleaned. Cleaning cycle depends supply air quality.
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