I will prepare for you a detailed, step-by-step standard procedure specifically about the replacement of the horizontal flow ultra-clean workbench and the HEPA filter. It is straightforward and can be followed directly. There are no unnecessary details. This procedure can be used as an SOP in both workshops and laboratories.
\nHorizontal flow ultra-clean workbench
\nDetailed steps for HEPA filter replacement
\n1. Before replacement (must be done first)
\nConfirm that it is a HEPA filter
\nFor horizontal flow workbench: The HEPA filter is located at the rear air supply position, not at the return air inlet.
\nIt cannot be washed or tapped. It is a one-time consumable.
\nReplacement signal (any one of the following conditions is sufficient)
\nThe pressure difference reading significantly increases, exceeding the normal value by more than 30%
\nThe wind speed significantly decreases and the cleanliness does not meet the standard
\nIt has been in use for 6-12 months (frequent use)
\nThe filter is deformed, leaking, or the rubber strip is aging
\nPreparation items
\nSame model new HEPA filter (with certificate of conformity)
\nCross-head screwdriver
\nDust-free cloth + 75% alcohol
\nDust-free gloves, mask, clean suit
\nSeal bag (for old filter)
\nSafety prerequisite
\nMust be powered off! Unplug the plug!
\nThe operation room should be quiet, with few people, no wind, and less dust.
\n2. Formal replacement steps (no omission)
\n1. Clean the exterior of the workbench and the inspection door
\nUse a dust-free cloth dipped in alcohol to wipe:
\nThe rear of the workbench, the inspection door, and the surrounding shell.
\nPurpose: To prevent dust from falling in when opening the door.
\n2. Open the inspection door of the HEPA filter
\nThe HEPA filter is generally located at the back of the workbench
\nUse a screwdriver to unscrew the fixing screws of the inspection door
\nThe screws should be placed on the dust-free cloth and not dropped or landed on the ground
\nGently remove the inspection door and place it flat on the dust-free cloth
\n3. Remove the old HEPA filter (the most critical step)
\nThe movement must be slow, gentle, and without shaking!
\nLoosen the pressure strip \/ latch \/ fixing piece of the filter
\nHold the filter frame with both hands and slowly pull out horizontally
\nStrictly prohibited:
\nShaking Flip
\nCollision \/ Accident
\nTouch the filter paper with your hands
\nAfter taking it out, immediately put it into a double-layer sealed bag and tie the opening tightly
\nTo prevent secondary pollution of the environment by dust accumulation.
\n4. Deep cleaning of the installation slot and the sealing rubber strip
\nThis step directly determines whether the cleanliness can meet the standards.
\nWipe with a dust-free cloth + 75% alcohol:
\nThe four sides of the installation slot frame
\nThe entire sealing rubber strip
\nThe inner side of the duct (lightly wipe, do not dig deeply)
\nKey checks:
\nWhether the rubber strip is aging, cracking, missing pieces, or falling off
\nIf there are problems, the rubber strip must be replaced first
\n5. Install the new high-efficiency filter
\nOpen the packaging of the new filter, do not touch the filter paper
\nCheck the arrow direction on the filter:
\n\u2192 The arrow must be consistent with the air flow direction (blow forward)
\nHold the frame with both hands, push it smoothly into the installation slot
\nEnsure:
\nThe four sides are completely sealed
\nThe rubber strip is not distorted, has no gaps, and does not leak air
\nFasten the pressure strip \/ latch, and fix evenly
\nDo not tighten too much to cause the frame to deform
\n6. Put the maintenance door back in place
\nPut the maintenance door back to its original position
\nScrew the screws diagonally (to ensure sealing)
\nWipe the external dust again
\nIII. After replacement, necessary debugging and verification must be done
\n1. Start the machine for empty blowing
\nPower on \u2192 Turn on the fan
\nOpen the glass door to the standard operating height (10-15cm)
\nRun empty for 30-40 minutes
\nBlow away the particles brought in during installation.
\n2. Wind speed check (passing standard)
\nNormal wind speed of the horizontal flow workbench: 0.3-0.5 m\/s at each point is uniform, with no obvious difference in strength.
\n3. Cleanliness verification (important)
\nUse an air particle counter to detect:
\n0.5\u03bcm particles \u2264 3520 particles \/ m\u00b3
\n5\u03bcm particles \u2264 20 particles \/ m\u00b3
\nIf it meets the requirements, it is considered as **Class 100 (ISO 5)** qualified.
\n4. Pressure difference check
\nThe pressure difference meter should return to the normal range and no longer be high.
\nIV. Record and archive (compliance must be met)
\nEach replacement must be recorded:
\nReplacement date
\nFilter model, number
\nBefore replacement phenomenon (pressure difference \/ wind speed)
\nAfter replacement wind speed, pressure difference, cleanliness results
\nOperator
\nV. Absolutely prohibited actions (red line)
\nDo not disassemble the high-efficiency filter while powered on
\nOld filters cannot be shaken, knocked, or left empty
\nFilter paper cannot be touched, wiped, or washed
\nArrow direction cannot be installed in reverse
\nSealing rubber strip cannot be faked with tape
\nAfter replacement, do not use directly without verification<\/p>","protected":false},"excerpt":{"rendered":"
I will prepare for you a detailed, step-by-step standard procedure specifically about the replacement of the horizontal flow ultra-clean workbench and the HEPA filter. It is straightforward and can be followed directly. There are no unnecessary details. This procedure can be used as an SOP in both workshops and laboratories. Horizontal flow ultra-clean workbench Detailed […]<\/p>","protected":false},"author":3,"featured_media":4379,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[92],"tags":[],"class_list":["post-5180","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\/5180","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=5180"}],"version-history":[{"count":1,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/posts\/5180\/revisions"}],"predecessor-version":[{"id":5181,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/posts\/5180\/revisions\/5181"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/media\/4379"}],"wp:attachment":[{"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/media?parent=5180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/categories?post=5180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bacintl.com\/es\/wp-json\/wp\/v2\/tags?post=5180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}