{"id":5117,"date":"2026-02-09T11:56:35","date_gmt":"2026-02-09T03:56:35","guid":{"rendered":"https:\/\/www.bacintl.com\/?p=5117"},"modified":"2026-02-09T08:50:12","modified_gmt":"2026-02-09T00:50:12","slug":"dop-high-efficiency-liquid-tank-filter-leak-detection-criteria","status":"publish","type":"post","link":"https:\/\/www.bacintl.com\/es\/dop-high-efficiency-liquid-tank-filter-leak-detection-criteria\/","title":{"rendered":"DOP high-efficiency liquid tank filter leak detection criteria"},"content":{"rendered":"

The leak detection determination for DOP high-efficiency liquid filter is based on the core standard of **\u22640.01% penetration rate (leakage rate)**. It is accompanied by repair and re-test rules, which need to cover the filter material, seal, and frame, and meet the specifications such as ISO 14644-3 and GB\/T 6165-2008. Here are the determination criteria and practical key points:
\nCore determination indicators
\nPenetration rate threshold: The continuous and stable penetration rate of all scanable points of the filter \u2264 0.01% (that is, one ten-thousandth of the upstream concentration), any point exceeding this threshold is judged as\u4e0d\u5408\u683c\uff0c and it needs to be marked for repair or replacement.
\nScan coverage range\uff1a Filter material surface\uff0c filter material – frame bonding area\uff0c frame – liquid tank sealing surface\uff0c liquid tank – static pressure box \/ enclosure joint\uff0c frame joint seam\uff0c etc.
\nDetection parameters\uff1a Scan speed \u2264 5cm\/s\uff0c probe distance from the filter surface is approximately 25mm\uff0c line overlap \u2265 10mm\uff1b the upstream aerosol concentration is stable at 10\u201320\u03bcg\/mL (or meets the instrument linear range).
\nRepair and re-test rules<\/p>\n\n\n\n\n\n\n
Project<\/td>\nQualified upper limit<\/td>\nRe-test requirements<\/td>\n<\/tr>\n
Single repair length<\/td>\n\u226438mm<\/td>\nAfter repair, a re-measurement of the entire area was conducted, and the penetration rate remained \u2264 0.01%<\/td>\n<\/tr>\n
Cumulative repair area<\/td>\n\u2264 3% of the filter material area<\/td>\nIf it exceeds the limit, it must be replaced entirely.<\/td>\n<\/tr>\n
Repair method<\/td>\nSpecial sealant \/ patch, compacted without air bubbles<\/td>\nMust not affect the sealing of the liquid tank and the uniformity of the airflow<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Qualification determination process
\nUpstream dust emission and concentration calibration: Confirm the stability of the upstream concentration, and perform zero adjustment and linear calibration on the spectrophotometer.
\nZone scanning and data recording: Scan each zone, record the penetration rate at each point, and mark and locate the abnormal points.
\nResult determination: If the penetration rate of all points is \u2264 0.01% and the repair is compliant, it is determined as qualified; otherwise, it needs to be repaired\/ replaced and retested until qualified.
\nReport and traceability: Record the equipment number, detection date, upstream concentration, maximum penetration rate, repair location \/ area, retest results, etc., and archive for retention.
\nKey standards basis
\nISO 14644\u20113: The maximum penetration rate of scanable high-efficiency filters is \u2264 0.01%.
\nGB\/T 6165\u20112008: The on-site leak detection penetration rate of high-efficiency filters (0.3\u03bcm) is \u2264 0.01%.
\nFDA\/GMP: The pharmaceutical industry requires that filters and seals have no leakage and the penetration rate is \u2264 0.01%.<\/p>","protected":false},"excerpt":{"rendered":"

The leak detection determination for DOP high-efficiency liquid filter is based on the core standard of **\u22640.01% penetration rate (leakage rate)**. It is accompanied by repair and re-test rules, which need to cover the filter material, seal, and frame, and meet the specifications such as ISO 14644-3 and GB\/T 6165-2008. Here are the determination criteria […]<\/p>","protected":false},"author":3,"featured_media":5118,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[92],"tags":[],"class_list":["post-5117","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\/5117","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\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/comments?post=5117"}],"version-history":[{"count":1,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/posts\/5117\/revisions"}],"predecessor-version":[{"id":5120,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/posts\/5117\/revisions\/5120"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/media\/5118"}],"wp:attachment":[{"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/media?parent=5117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/categories?post=5117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/tags?post=5117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}