{"id":26999,"date":"2025-09-02T16:35:38","date_gmt":"2025-09-02T08:35:38","guid":{"rendered":"https:\/\/stark-water.com\/?p=26999"},"modified":"2026-04-01T16:32:27","modified_gmt":"2026-04-01T08:32:27","slug":"pp-filter","status":"publish","type":"post","link":"https:\/\/stark-water.com\/ko\/%eb%b8%94%eb%a1%9c%ea%b7%b8\/pp-filter\/","title":{"rendered":"5\ub9c8\uc774\ud06c\ub860 20\uc778\uce58 PP \ud544\ud130\ub294 \uc5bc\ub9c8\ub098 \uc790\uc8fc \uad50\uccb4\ud574\uc57c \ud560\uae4c\uc694? \uc5d4\uc9c0\ub2c8\uc5b4\ub97c \uc704\ud55c \ud604\uc7a5 \uac00\uc774\ub4dc"},"content":{"rendered":"<p>If you run sediment pretreatment, you\u2019ve likely asked:\u00a0<strong>how long will a 5 micron 20 inch <a href=\"https:\/\/baike.baidu.com\/item\/PP%E6%A3%89%E6%BB%A4%E8%8A%AF\/2735425\" target=\"_blank\" rel=\"noopener\">PP filter<\/a> last<\/strong>, and what\u2019s the safest way to decide the replacement time? This guide gives you actionable thresholds using\u00a0<strong>pressure drop (\u0394P)<\/strong>, water quality trends, and scenario-based timelines you can apply immediately.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quick Answer: 3 Signals That Trigger Replacement<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u0394P (pressure drop):<\/strong>&nbsp;Replace around&nbsp;<strong>0.10 MPa (\u224815 psi)<\/strong>. Above this, pump energy rises sharply and bypass risk increases.<\/li>\n\n\n\n<li><strong>Filtrate quality:<\/strong>&nbsp;Rising turbidity\/particle count or unusual pressure drop across downstream carbon\/RO indicates breakthrough.<\/li>\n\n\n\n<li><strong>Time backstop:<\/strong>&nbsp;Even if \u0394P is low, change the cartridge every&nbsp;<strong>1\u20133 months<\/strong>&nbsp;depending on load and feed quality.<\/li>\n<\/ul>\n\n\n\n<p>Use \u0394P and filtrate quality as the main controls; use time as a conservative backstop.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Does the 5 micron 20 inch pp filter \u201cTighten\u201d Over Time?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Gradient-depth melt-blown structure<\/h3>\n\n\n\n<p>The cartridge uses a&nbsp;<em>graded density<\/em>&nbsp;design\u2014open fibers outside and tighter fibers toward the core. Larger particles are intercepted first, finer ones later, which increases dirt-holding capacity and keeps initial \u0394P low.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fouling mechanisms<\/h3>\n\n\n\n<p>Seasonal turbidity, colloids, iron\/manganese, and load spikes progressively block pores, so \u0394P climbs over time. Melt-blown PP is&nbsp;<strong>not designed for backwashing<\/strong>; cleaning attempts can damage the fiber pathways and risk breakthrough.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Where 5 \u03bcm fits in a train<\/h3>\n\n\n\n<p>A common staging is&nbsp;<strong>20 \u03bcm \u2192 5 \u03bcm \u2192 carbon\/RO<\/strong>. The 5 \u03bcm stage is the \u201cgeneral purpose\u201d guard that balances capture efficiency and reasonable \u0394P.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Judge Replacement Time (Step by Step)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1) Monitor \u0394P (priority signal)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Install gauges on housing inlet\/outlet. Record weekly:&nbsp;<code>\u0394P = P_in \u2212 P_out<\/code>.<\/li>\n\n\n\n<li>Typical new-cartridge \u0394P at design flow:&nbsp;<strong>0.02\u20130.05 MPa<\/strong>.<\/li>\n\n\n\n<li><strong>Replacement threshold:<\/strong>&nbsp;<strong>0.10 MPa (\u224815 psi)<\/strong>&nbsp;or when the growth rate accelerates.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2) Watch filtrate quality and downstream behavior<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rising turbidity\/SDI or visible clarity drop.<\/li>\n\n\n\n<li>Higher \u0394P across carbon\/softener\/RO compared to baseline suggests upstream breakthrough.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3) Time-based backstop<\/h3>\n\n\n\n<p>Set a conservative calendar limit and refine it with your \u0394P data:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Good municipal feed \/ light duty:&nbsp;<strong>8\u201312 weeks<\/strong><\/li>\n\n\n\n<li>Average duty (typical RO pretreatment):&nbsp;<strong>4\u20138 weeks<\/strong><\/li>\n\n\n\n<li>Poor feed \/ high load (well\/surface water peaks):&nbsp;<strong>2\u20134 weeks<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Worked Example: Estimating Cartridge Life From \u0394P Trend<\/h2>\n\n\n\n<p><strong>Given:<\/strong>&nbsp;5 micron 20 inch PP filter, design flow ~14 L\/min; new \u0394P&nbsp;<code>\u0394P\u2080 = 0.03 MPa<\/code>. Weekly \u0394P increase (site data):&nbsp;<code>k = 0.003 MPa\/week<\/code>. Allowed \u0394P&nbsp;<code>\u0394P* = 0.10 MPa<\/code>.<\/p>\n\n\n\n<p><strong>Usable \u0394P margin<\/strong>&nbsp;=&nbsp;<code>\u0394P* \u2212 \u0394P\u2080 = 0.07 MPa<\/code>&nbsp;\u2192&nbsp;<strong>Estimated life<\/strong>&nbsp;\u2248&nbsp;<code>0.07 \/ 0.003 = ~23 weeks<\/code>.<\/p>\n\n\n\n<p><em>\ucc38\uace0:<\/em>&nbsp;k depends heavily on season and solids loading. If sudden load spikes occur, obey the threshold, not the estimate.<\/p>\n\n\n\n<p><strong>Rule of thumb:<\/strong>&nbsp;<code>Life (weeks) \u2248 (\u0394P* \u2212 \u0394P0) \/ k<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Replacement Intervals by Scenario<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\uc2dc\ub098\ub9ac\uc624<\/th><th>Typical Flow<\/th><th>New \u0394P<\/th><th>Replace at \u0394P<\/th><th>Suggested Interval<\/th><th>\ucc38\uace0<\/th><\/tr><\/thead><tbody><tr><td>Residential \/ light commercial POE<\/td><td>8\u201312 L\/min<\/td><td>0.02\u20130.04 MPa<\/td><td>0.10 MPa<\/td><td>8\u201312 weeks<\/td><td>Use calendar backstop; refine with gauges<\/td><\/tr><tr><td>Industrial RO pretreatment<\/td><td>12\u201316 L\/min<\/td><td>0.03\u20130.05 MPa<\/td><td>0.10 MPa<\/td><td>4\u20138 weeks<\/td><td>Track RO SDI and \u0394P curves<\/td><\/tr><tr><td>Well\/surface water (muddy season)<\/td><td>10\u201316 L\/min<\/td><td>0.04\u20130.06 MPa<\/td><td>0.10 MPa<\/td><td>2\u20134 weeks<\/td><td>Add sand\/UF ahead to reduce load<\/td><\/tr><tr><td>Food &amp; beverage batch prep<\/td><td>Process-specific<\/td><td>-<\/td><td>0.10 MPa<\/td><td>Per batch or \u0394P<\/td><td>Change with batch turnover<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Choosing the Right 5 Micron 20\u2033 PP Filter (to Avoid Over-Frequent Changes)<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/stark-water.com\/wp-content\/uploads\/2025\/09\/5-micron-20-inch-pp-filter.webp\" alt=\"5\ub9c8\uc774\ud06c\ub860 20\uc778\uce58 PP \ud544\ud130\" class=\"wp-image-27010\" title=\"\" srcset=\"https:\/\/stark-water.com\/wp-content\/uploads\/2025\/09\/5-micron-20-inch-pp-filter.webp 1024w, https:\/\/stark-water.com\/wp-content\/uploads\/2025\/09\/5-micron-20-inch-pp-filter-300x300.webp 300w, https:\/\/stark-water.com\/wp-content\/uploads\/2025\/09\/5-micron-20-inch-pp-filter-150x150.webp 150w, https:\/\/stark-water.com\/wp-content\/uploads\/2025\/09\/5-micron-20-inch-pp-filter-768x768.webp 768w, https:\/\/stark-water.com\/wp-content\/uploads\/2025\/09\/5-micron-20-inch-pp-filter-12x12.webp 12w, https:\/\/stark-water.com\/wp-content\/uploads\/2025\/09\/5-micron-20-inch-pp-filter-600x600.webp 600w, https:\/\/stark-water.com\/wp-content\/uploads\/2025\/09\/5-micron-20-inch-pp-filter-100x100.webp 100w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">5\ub9c8\uc774\ud06c\ub860 20\uc778\uce58 PP \ud544\ud130<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Key specifications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Size:<\/strong>&nbsp;2.5\u2033 \u00d7 20\u2033 (check OD\/ID tolerances), double open end (DOE)<\/li>\n\n\n\n<li><strong>\uc530:<\/strong>&nbsp;EPDM standard; FKM (Viton) optional to match chemical conditions<\/li>\n\n\n\n<li><strong>Design flow &amp; initial \u0394P:<\/strong>&nbsp;confirm at your operating flow\/temperature<\/li>\n\n\n\n<li><strong>Gradient-depth construction:<\/strong>&nbsp;higher dirt-holding capacity and smoother \u0394P curve<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Staging &amp; load management<\/h3>\n\n\n\n<p>\uc0ac\uc6a9&nbsp;<strong>20 \u03bcm \u2192 5 \u03bcm \u2192 carbon\/RO<\/strong>. For heavy solids, add a mesh\/sand\/UF step to protect cartridges.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common pitfalls<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Jumping straight to 1 \u03bcm for all loads \u2192 early clogging and higher energy.<\/li>\n\n\n\n<li>Trying to backwash\/reuse melt-blown PP \u2192 fiber damage and breakthrough risk.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Replacement Steps &amp; Safety Notes<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Shut inlet\/outlet valves and depressurize to 0.<\/li>\n\n\n\n<li>Open housing, remove the cartridge. Clean the seat and inspect the O-ring.<\/li>\n\n\n\n<li>Insert new cartridge (correct orientation), lightly lube seal with food-grade grease.<\/li>\n\n\n\n<li>Close housing, open valves slowly to vent air, check for leaks.<\/li>\n\n\n\n<li>Log date, flow,&nbsp;<strong>\u0394P<\/strong>, and any water quality notes for trend analysis.<\/li>\n\n\n\n<li>Dispose of the spent cartridge per local regulations (industrial sites: follow waste policy).<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Weekly Check Template (Columns to Track)<\/h2>\n\n\n\n<p><em>Date | Flow | P_in | P_out | \u0394P | Turbidity\/SDI | Notes<\/em>&nbsp;\u2014 keeping this simple log quickly reveals your optimal interval.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Should I pick 1 \u03bcm, 5 \u03bcm, or 10\/20 \u03bcm?<\/h3>\n\n\n\n<p>For general pretreatment,&nbsp;<strong>20 \u03bcm \u2192 5 \u03bcm<\/strong>&nbsp;is a dependable combo. 1 \u03bcm is for very low particle tolerance but clogs faster. Choose based on feed solids and downstream needs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can a 5 micron 20 inch PP filter be backwashed or reused?<\/h3>\n\n\n\n<p>Not recommended. Melt-blown polypropylene is not backwashable; cleaning can damage the fiber structure and lead to particle breakthrough.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is the material safe for drinking water?<\/h3>\n\n\n\n<p>PP media is commonly used for potable-water pretreatment. Compliance depends on the complete system (housing, seals, local regulations); verify to your jurisdiction and project requirements.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How does it work with carbon and RO?<\/h3>\n\n\n\n<p>As a sediment barrier upstream of carbon\/RO, it reduces particulate load, stabilizes SDI, and typically extends downstream element life.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Get Pricing or a Sample<\/h2>\n\n\n\n<p>Need a reliable supply of&nbsp;<strong>5 micron 20 inch PP filter<\/strong>&nbsp;cartridges? Contact STARK for quotes, private label, and documentation.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/ko\/product\/5-micron-20-inch-pp-sediment-filter\/\">5 \u03bcm 20\u2033 PP Filter (Product Page)<\/a><\/li>\n\n\n\n<li><a href=\"\/ko\/product\/6000lph-ro-%ec%a0%95%ec%88%98-%ec%8b%9c%ec%8a%a4%ed%85%9c\/\">6000 LPH RO System<\/a><\/li>\n\n\n\n<li><a href=\"\/ko\/product\/%ed%94%8c%eb%9d%bc%ec%8a%a4%ed%8b%b1-%ec%95%84%ed%81%ac%eb%a6%b4-%ec%9c%a0%eb%9f%89%ea%b3%84-%eb%a1%9c%ed%83%80%eb%af%b8%ed%84%b0\/\">Plastic &amp; Acrylic Flow Meter<\/a><\/li>\n\n\n\n<li><a href=\"\/ko\/product\/160m3h-uf-water-purifier\/\">160 m\u00b3\/h UF Water Purifier<\/a><\/li>\n<\/ul>\n\n\n\n<p>Technical reviewer:&nbsp;<a href=\"\/ko\/about-us\/\">STARK Water Editorial<\/a>&nbsp;| Last updated: 2025-09-02<\/p>\n\n\n\n<p><em>All values are typical and configurable. Replacement intervals depend on actual feed quality and load; always verify with your site data and regulations.<\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>If you run sediment pretreatment, you\u2019ve likely asked:\u00a0how long will a 5 micron 20 inch PP filter last, and what\u2019s [&hellip;]<\/p>","protected":false},"author":1,"featured_media":27012,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_joinchat":[],"footnotes":""},"categories":[1],"tags":[237],"class_list":["post-26999","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-water-treatment-industry-information","tag-pp-filter"],"acf":[],"_links":{"self":[{"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/posts\/26999","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/comments?post=26999"}],"version-history":[{"count":2,"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/posts\/26999\/revisions"}],"predecessor-version":[{"id":68713,"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/posts\/26999\/revisions\/68713"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/media\/27012"}],"wp:attachment":[{"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/media?parent=26999"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/categories?post=26999"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stark-water.com\/ko\/wp-json\/wp\/v2\/tags?post=26999"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}