{"id":894,"date":"2026-07-30T02:00:00","date_gmt":"2026-07-30T02:00:00","guid":{"rendered":"https:\/\/fswelfarefilter.com\/?p=894"},"modified":"2026-07-28T03:16:20","modified_gmt":"2026-07-28T03:16:20","slug":"filter-paper-permeability-guide","status":"publish","type":"post","link":"https:\/\/fswelfarefilter.com\/ru\/filter-paper-permeability-guide\/","title":{"rendered":"\u041f\u0440\u043e\u043d\u0438\u0446\u0430\u0435\u043c\u043e\u0441\u0442\u044c \u0444\u0438\u043b\u044c\u0442\u0440\u043e\u0432\u0430\u043b\u044c\u043d\u043e\u0439 \u0431\u0443\u043c\u0430\u0433\u0438: \u043a\u0430\u043a \u0441\u0431\u0430\u043b\u0430\u043d\u0441\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0442\u043e\u043a, \u0443\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u0438 \u0441\u0440\u043e\u043a \u0441\u043b\u0443\u0436\u0431\u044b \u0444\u0438\u043b\u044c\u0442\u0440\u0430"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>\u041e\u0433\u043b\u0430\u0432\u043b\u0435\u043d\u0438\u0435<\/h2><nav><ul><li><a href=\"#what-filter-paper-permeability-actually-means\">What Filter Paper Permeability Actually Means<\/a><\/li><li><a href=\"#why-permeability-is-not-the-same-as-filtration-accuracy\">Why Permeability Is Not the Same as Filtration Accuracy<\/a><\/li><li><a href=\"#the-paper-properties-that-influence-flow\">The Paper Properties That Influence Flow<\/a><\/li><li><a href=\"#how-the-process-changes-filter-paper-permeability\">How the Process Changes Filter Paper Permeability<\/a><\/li><li><a href=\"#how-to-read-a-supplier-data-sheet\">How to Read a Supplier Data Sheet<\/a><\/li><li><a href=\"#compare-flow-under-controlled-conditions\">Compare Flow Under Controlled Conditions<\/a><\/li><li><a href=\"#choose-the-right-direction-for-a-media-trial\">Choose the Right Direction for a Media Trial<\/a><\/li><li><a href=\"#common-permeability-selection-mistakes\">Common Permeability Selection Mistakes<\/a><\/li><li><a href=\"#frequently-asked-questions\">Frequently Asked Questions<\/a><\/li><li><a href=\"#request-a-controlled-filter-paper-trial\">Request a Controlled Filter Paper Trial<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">A filter medium can produce clear liquid and still be wrong for the equipment if the flow falls too quickly. It can also deliver excellent flow while allowing too much contamination downstream. Filter paper permeability sits between those two outcomes. It describes how readily a fluid or gas can pass through the sheet under defined conditions, but buyers should not treat it as a stand-alone promise of filtration performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide explains how process engineers and purchasing teams can interpret filter paper permeability, compare supplier data, and run a useful production trial. The goal is not to choose the highest or lowest number. It is to find a repeatable balance between initial flow, particle retention, cake formation, wet strength, and service life.<\/p>\n\n\n\n<h2 id=\"what-filter-paper-permeability-actually-means\" class=\"wp-block-heading\">What Filter Paper Permeability Actually Means<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Filter paper permeability expresses the ease with which a medium allows flow through its connected pore structure. A more open structure usually creates less initial resistance, while a tighter structure usually creates more resistance. The result depends on the test fluid, pressure difference, exposed area, sample conditioning, and measurement method.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Paper laboratories often use air-permeance or air-resistance methods because they are controlled and repeatable. <a href=\"https:\/\/www.iso.org\/standard\/53062.html\" target=\"_blank\" rel=\"noopener\">ISO 5636-5<\/a>, for example, specifies the Gurley method for determining the air permeance of paper and board within its stated measurement range. An air result is valuable for lot comparison, but industrial liquid filtration also involves viscosity, surface tension, contaminants, additives, temperature, and cake formation. Filter paper permeability therefore needs both laboratory context and process context.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper.jpg-1.webp\" alt=\"Industrial filter paper roll selected for controlled permeability\" class=\"wp-image-896\" srcset=\"https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper.jpg-1.webp 1000w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper.jpg-1-300x300.webp 300w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper.jpg-1-150x150.webp 150w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper.jpg-1-768x768.webp 768w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper.jpg-1-12x12.webp 12w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper.jpg-1-800x800.webp 800w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper.jpg-1-100x100.webp 100w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 id=\"why-permeability-is-not-the-same-as-filtration-accuracy\" class=\"wp-block-heading\">Why Permeability Is Not the Same as Filtration Accuracy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Filter paper permeability and particle retention are related, but they are not interchangeable. Two papers can show similar air-flow behavior while using different fiber blends, thicknesses, pore distributions, or surface structures. Those differences can affect how particles enter the sheet, remain on the surface, or form a filter cake.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A buyer who selects only by a nominal micron value may overlook flow. A buyer who selects only by filter paper permeability may overlook downstream cleanliness. The correct specification should state the required filtrate condition and the operating envelope. Our article on <a href=\"https:\/\/fswelfarefilter.com\/ru\/filter-paper-gsm-selection-guide\/\">filter paper GSM<\/a> explains a similar limitation: basis weight alone cannot tell you whether a sheet is fine, open, strong, or suitable for a particular liquid.<\/p>\n\n\n\n<h2 id=\"the-paper-properties-that-influence-flow\" class=\"wp-block-heading\">The Paper Properties That Influence Flow<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Pore Structure and Fiber Formation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Connected pore paths determine how liquid moves through the sheet. Uniform formation helps distribute flow across the available area. Local dense spots can create unnecessary resistance, while very open spots can become preferential channels. Stable filter paper permeability depends on controlling the structure across the width and along the roll.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Thickness and Compressibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A thicker medium may provide a longer path and more internal space for particles, but thickness does not automatically mean lower filter paper permeability. Compressibility matters as well. Pressure, roll tension, or an uneven support can compact the sheet and change its resistance. <a href=\"https:\/\/www.iso.org\/standard\/53060.html\" target=\"_blank\" rel=\"noopener\">ISO 534<\/a> describes standardized methods for determining paper thickness, density, and specific volume, which helps explain why thickness data should be measured rather than estimated from weight.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Wet Strength and Surface Treatment<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Strength treatments help a sheet survive handling and liquid exposure, but any change to the fiber network can also affect filter paper permeability. A stronger paper is useful only if it maintains the necessary flow and retention. Review the <a href=\"https:\/\/fswelfarefilter.com\/ru\/wet-strength-filter-paper-selection\/\">wet-strength filter paper guide<\/a> when tearing, stretching, or bypass occurs together with flow loss.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper04.jpg-1.webp\" alt=\"Industrial filter paper surface used to evaluate flow consistency\" class=\"wp-image-895\" srcset=\"https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper04.jpg-1.webp 1000w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper04.jpg-1-300x300.webp 300w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper04.jpg-1-150x150.webp 150w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper04.jpg-1-768x768.webp 768w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper04.jpg-1-12x12.webp 12w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper04.jpg-1-800x800.webp 800w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper04.jpg-1-100x100.webp 100w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 id=\"how-the-process-changes-filter-paper-permeability\" class=\"wp-block-heading\">How the Process Changes Filter Paper Permeability<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A laboratory result describes a conditioned sample. A production line adds variables. Cold oil moves more slowly than warm oil. A water-based coolant may contain tramp oil, fines, additives, biological material, and concentration changes. The <a href=\"https:\/\/www.osha.gov\/metalworking-fluids\/manual\" target=\"_blank\" rel=\"noopener\">OSHA metalworking fluids manual<\/a> describes the variety of straight, soluble, semisynthetic, and synthetic fluids used in machining and the importance of maintaining filtration systems.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Viscosity:<\/strong> Higher viscosity reduces flow through the same medium.<\/li>\n\n\n\n<li><strong>Temperature:<\/strong> Temperature changes viscosity and can alter apparent performance.<\/li>\n\n\n\n<li><strong>Solids load:<\/strong> More particles create resistance faster, even when initial filter paper permeability is unchanged.<\/li>\n\n\n\n<li><strong>Particle shape:<\/strong> Fibrous, plate-like, hard, soft, and sticky contaminants form different cakes.<\/li>\n\n\n\n<li><strong>Pressure:<\/strong> Greater driving pressure may increase flow but can compact the paper or force particles deeper.<\/li>\n\n\n\n<li><strong>Distribution:<\/strong> Uneven wetting uses only part of the installed filter area.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These variables explain why filter paper permeability should be checked under a stable, documented process. If a line suddenly slows, use the <a href=\"https:\/\/fswelfarefilter.com\/ru\/filter-paper-clogging-fixes\/\">filter paper clogging diagnostic guide<\/a> before concluding that the supplied roll has changed.<\/p>\n\n\n\n<h2 id=\"how-to-read-a-supplier-data-sheet\" class=\"wp-block-heading\">How to Read a Supplier Data Sheet<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A filter paper permeability value is meaningful only when the test method and units are clear. Ask whether the value is a typical result, an average, or a controlled specification range. Confirm the conditioning environment, sample area, pressure difference, apparatus, and direction of flow.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also request the properties that help interpret the result: basis weight, thickness, tensile or wet strength, and any available retention or application data. Do not compare values from two different methods as if they were directly equivalent. A numerical result without its method can create false confidence.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Data item<\/th><th>What it helps explain<\/th><th>Question to ask<\/th><\/tr><\/thead><tbody><tr><td>Permeability or air resistance<\/td><td>Initial resistance under a defined method<\/td><td>Which method, units, pressure, and range were used?<\/td><\/tr><tr><td>\u0411\u0430\u0437\u0438\u0441\u043d\u044b\u0439 \u0432\u0435\u0441<\/td><td>Mass per unit area<\/td><td>Is it a target value or a controlled tolerance?<\/td><\/tr><tr><td>\u0422\u043e\u043b\u0449\u0438\u043d\u0430<\/td><td>Sheet caliper and possible holding volume<\/td><td>Was single-sheet thickness measured under a stated pressure?<\/td><\/tr><tr><td>\u0412\u043b\u0430\u0436\u043d\u0430\u044f \u043f\u0440\u043e\u0447\u043d\u043e\u0441\u0442\u044c<\/td><td>Resistance to tearing or deformation in service<\/td><td>Which liquid and test condition were used?<\/td><\/tr><tr><td>Retention information<\/td><td>Expected particle-control behavior<\/td><td>Is the value nominal, absolute, or application-based?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"compare-flow-under-controlled-conditions\" class=\"wp-block-heading\">Compare Flow Under Controlled Conditions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When comparing filter paper permeability, use samples with the same exposed area and support. Keep fluid temperature, concentration, flow demand, and solids feed as consistent as the process allows. Record the initial flow before a cake forms, then record how resistance changes as solids accumulate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pressure and flow should be considered together. <a href=\"https:\/\/www.iso.org\/standard\/64104.html\" target=\"_blank\" rel=\"noopener\">ISO 3968<\/a> provides a standardized framework for evaluating differential pressure versus flow characteristics in hydraulic filters. A roll-paper system is not the same device, but the engineering lesson remains useful: a flow result without the corresponding pressure and viscosity is incomplete.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Measure filtrate quality at defined points rather than judging only by appearance. A more open sheet may show attractive initial filter paper permeability but allow an unacceptable contaminant load. A tighter sheet may produce clear liquid but require frequent advancement. The best trial result is the one that satisfies both process cleanliness and stable operation.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper03.jpg-1.webp\" alt=\"Filter paper rolls prepared for controlled permeability trials\" class=\"wp-image-897\" srcset=\"https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper03.jpg-1.webp 1000w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper03.jpg-1-300x300.webp 300w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper03.jpg-1-150x150.webp 150w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper03.jpg-1-768x768.webp 768w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper03.jpg-1-12x12.webp 12w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper03.jpg-1-800x800.webp 800w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper03.jpg-1-100x100.webp 100w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 id=\"choose-the-right-direction-for-a-media-trial\" class=\"wp-block-heading\">Choose the Right Direction for a Media Trial<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If flow is low from the beginning and filtrate is cleaner than necessary, a modest increase in filter paper permeability may be worth testing. If flow begins well but clarity is poor, moving to an even more open sheet is unlikely to solve the real problem. If flow declines rapidly after a short stable period, inspect the contaminant and cake before changing the initial permeability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For continuous equipment, review roll width, core size, length, and support conditions at the same time. The <a href=\"https:\/\/fswelfarefilter.com\/ru\/industrial-filter-paper-roll\/\">\u0440\u0443\u043b\u043e\u043d\u043d\u0430\u044f \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u0440\u043e\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u043e\u0439 \u0444\u0438\u043b\u044c\u0442\u0440\u043e\u0432\u0430\u043b\u044c\u043d\u043e\u0439 \u0431\u0443\u043c\u0430\u0433\u0438<\/a> explains how roll dimensions and process requirements should be specified together. Our <a href=\"https:\/\/fswelfarefilter.com\/ru\/product\/large-industrial-filter-paper\/\">\u0431\u043e\u043b\u044c\u0448\u0430\u044f \u043f\u0440\u043e\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0430\u044f \u0444\u0438\u043b\u044c\u0442\u0440\u043e\u0432\u0430\u043b\u044c\u043d\u0430\u044f \u0431\u0443\u043c\u0430\u0433\u0430<\/a> page shows common industrial formats that can be discussed for a controlled sample.<\/p>\n\n\n\n<h2 id=\"common-permeability-selection-mistakes\" class=\"wp-block-heading\">Common Permeability Selection Mistakes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Comparing numbers from different test methods without conversion or context.<\/li>\n\n\n\n<li>Assuming higher filter paper permeability always means a better production rate.<\/li>\n\n\n\n<li>Using basis weight as a substitute for pore structure or retention.<\/li>\n\n\n\n<li>Running samples at different fluid temperatures or solids loads.<\/li>\n\n\n\n<li>Ignoring distribution, support condition, tension, or sealing in the filter.<\/li>\n\n\n\n<li>Judging a trial only by roll life without measuring filtrate quality.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A good specification does not maximize filter paper permeability. It defines an acceptable range that the manufacturer can reproduce and the process can use consistently.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper02-800x800.jpg-1.webp\" alt=\"Large filter paper roll for stable industrial liquid flow\" class=\"wp-image-898\" srcset=\"https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper02-800x800.jpg-1.webp 800w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper02-800x800.jpg-1-300x300.webp 300w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper02-800x800.jpg-1-150x150.webp 150w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper02-800x800.jpg-1-768x768.webp 768w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper02-800x800.jpg-1-12x12.webp 12w, https:\/\/fswelfarefilter.com\/wp-content\/uploads\/2026\/07\/Da-Zhang-Industrial-Filter-Paper02-800x800.jpg-1-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 id=\"frequently-asked-questions\" class=\"wp-block-heading\">Frequently Asked Questions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Does higher filter paper permeability mean coarser filtration?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Often there is a trade-off, but the relationship is not universal. Fiber formation, thickness, pore distribution, and surface behavior all matter. Confirm retention with a relevant test instead of inferring it from filter paper permeability alone.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can air permeance predict liquid flow exactly?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. Air testing is useful for controlled comparison, but liquid viscosity, temperature, wetting, contaminants, and cake formation change production behavior. Use air data for consistency and a liquid trial for application confirmation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why does the same paper flow differently in winter?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Lower temperature can increase liquid viscosity, especially with oils. The sheet may have the same filter paper permeability while the process delivers less flow. Compare results at a stable temperature before changing media.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Should permeability be a controlled purchasing specification?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It can be useful when the method, units, range, and sampling plan are agreed. It should sit beside other requirements such as dimensions, strength, and filtration performance rather than replace them.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What should I send a manufacturer for a permeability review?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Send the current paper specification or sample, equipment type, roll dimensions, fluid, temperature, flow, pressure, contaminant description, service interval, and required filtrate condition. Explain whether the concern is initial filter paper permeability, rapid flow loss, or poor clarity.<\/p>\n\n\n\n<h2 id=\"request-a-controlled-filter-paper-trial\" class=\"wp-block-heading\">Request a Controlled Filter Paper Trial<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Filter paper permeability is most useful when it is tied to a documented process and a repeatable test. If you need to compare a current roll with a more open or tighter alternative, <a href=\"https:\/\/fswelfarefilter.com\/ru\/contact-us\/\">contact Fushun Civil Affairs Filter Paper Factory<\/a>. Provide the operating details and required roll dimensions so the discussion can focus on a practical trial rather than a single isolated number.<\/p>","protected":false},"excerpt":{"rendered":"<p>A filter medium can produce clear liquid and still be wrong for the equipment if the flow falls too quickly. It can also deliver excellent flow while allowing too much contamination downstream. Filter paper permeability sits between those two outcomes. It describes how readily a fluid or gas can pass through the sheet under defined [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[68,69,53,63,40],"class_list":["post-894","post","type-post","status-publish","format-standard","hentry","category-blog","tag-filter-media-testing","tag-filter-paper-permeability","tag-filtration-flow-rate","tag-industrial-filtration","tag-liquid-filtration"],"_links":{"self":[{"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/posts\/894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/comments?post=894"}],"version-history":[{"count":1,"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/posts\/894\/revisions"}],"predecessor-version":[{"id":899,"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/posts\/894\/revisions\/899"}],"wp:attachment":[{"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/media?parent=894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/categories?post=894"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fswelfarefilter.com\/ru\/wp-json\/wp\/v2\/tags?post=894"}],"curies":[{"name":"\u0432\u043f","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}