Standard for Determining the Replacement of High-Efficiency Filters in Layered Air Filtration Enclosures (Priority Levels, GMP Compliance Available)
\nI. First determination criterion: Pressure difference (the most objective and commonly used in daily practice)
\nAfter the equipment is installed, record the initial pressure difference;
\nWhen the operating pressure difference rises to twice the initial pressure difference, replacement is mandatory;
\nIf the pressure difference rapidly increases in a short period (significantly rising within half a month), even if it has not reached twice the initial pressure difference, it should be investigated. There is a high probability of premature damage and dust leakage, and it is recommended to replace the high-efficiency filter in advance.
\nII. Second determination criterion: Wind speed not meeting standards
\nStandard working surface wind speed of the laminar flow enclosure: 0.36 – 0.54 m\/s
\nAfter excluding faults in the fan, backflow blockage, and severe blockage of the primary \/ intermediate efficiency filters, if the measured average wind speed continuously falls below the lower limit;
\nLocal areas have no airflow or the airflow is skewed, indicating that there is a large-scale accumulation of dust and blockage in the filter area, and it should be replaced directly.
\nIii. Third basis for judgment: PAO\/DOP leak detection fails (legal verification standard)
\nIf the following situations occur during the annual integrity scanning test\uff0c it cannot be repaired by re-sealing and increasing pressure\uff0c and replacement is mandatory\uff1a
\nThe filter material body has leakage points\uff0c and the leakage exceeds the standard\uff1b
\nThe filter frame is damaged\uff0c the filter paper is cracked\uff1b
\nThe sealing strip has aged and failed, and even after replacing the gasket, leakage still persists.
\nIV. On-site visual phenomena (auxiliary judgment during daily inspections)
\nIf any of the following occurs\uff0c replace it after confirming with re-measurement of the pressure difference\uff1a
\nContinuous visible dust and flocculent matter blowing out from the outlet under the light\uff1b
\nSignificantly increased noise and vibration from the fan (excessive filter resistance\uff0c fan overload)\uff1b
\nThe high-efficiency windward surface becomes black and is severely clogged with dust\uff0c making it impossible to clean\uff1b
\nLong-term excessive suspended particles in the clean area\uff0c excluding external factors such as personnel\uff0c environment\uff0c and laminar flow showers.
\nV. Time is for reference only and cannot be used as the sole basis for replacement
\n8 – 12 hours of intermittent operation\uff1a Refer to 2 – 3 years\uff1b
\n24 hours of continuous operation\uff1a Refer to 1.5 – 2 years\uff1b
\nHigh dust production and frequent expiration of primary filters\uff1a Shorten to 1 – 1.5 years.
\nEven if the service life has not been reached, the pressure difference\/leak detection\/wind speed should still be replaced if they are not up to standard.
\nVI. Simple judgment process
\nCheck the pressure difference every day \u2192 When the pressure difference reaches 2 times \u2192 Replace
\nIf the pressure difference is normal \u2192 Measure the working surface wind speed \u2192 Wind speed is low \u2192 Replace
\nIf both pressure difference and wind speed are normal \u2192 Annual PAO test \u2192 Leakage exceeds the standard \u2192 Replace
\nIf all of the above are normal but dust is continuously discharged and particles exceed the standard \u2192 Replace
\nImportant prohibition
\nHigh-efficiency filters are prohibited from being blown with air guns\uff0c washed with water\uff0c or patted. If there is blockage or leakage\uff0c only the entire filter can be replaced\uff0c and repair attempts will be ineffective.<\/p>","protected":false},"excerpt":{"rendered":"
Standard for Determining the Replacement of High-Efficiency Filters in Layered Air Filtration Enclosures (Priority Levels, GMP Compliance Available) I. First determination criterion: Pressure difference (the most objective and commonly used in daily practice) After the equipment is installed, record the initial pressure difference; When the operating pressure difference rises to twice the initial pressure difference, […]<\/p>","protected":false},"author":12,"featured_media":5343,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[92],"tags":[],"class_list":["post-5563","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-technology"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/posts\/5563","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/comments?post=5563"}],"version-history":[{"count":1,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/posts\/5563\/revisions"}],"predecessor-version":[{"id":5564,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/posts\/5563\/revisions\/5564"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/media\/5343"}],"wp:attachment":[{"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/media?parent=5563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/categories?post=5563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/tags?post=5563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}