{"id":332,"date":"2025-10-08T14:49:24","date_gmt":"2025-10-08T14:49:24","guid":{"rendered":"https:\/\/spartaseal.com\/?p=332"},"modified":"2025-10-09T00:21:32","modified_gmt":"2025-10-09T00:21:32","slug":"ptfe-washers-vs-other-washer-materials-a-comparative-data%e2%80%91led-review-for-global-engineers","status":"publish","type":"post","link":"https:\/\/spartaseal.com\/ru\/ptfe-washers-vs-other-washer-materials-a-comparative-data%e2%80%91led-review-for-global-engineers\/","title":{"rendered":"\u0428\u0430\u0439\u0431\u044b \u0438\u0437 \u041f\u0422\u0424\u042d \u0432 \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0438 \u0441 \u0434\u0440\u0443\u0433\u0438\u043c\u0438 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0430\u043c\u0438 \u0434\u043b\u044f \u0448\u0430\u0439\u0431: \u0421\u0440\u0430\u0432\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439, \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u043d\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u043e\u0431\u0437\u043e\u0440 \u0434\u043b\u044f \u043c\u0438\u0440\u043e\u0432\u044b\u0445 \u0438\u043d\u0436\u0435\u043d\u0435\u0440\u043e\u0432"},"content":{"rendered":"<style>\n  :root{\n    --ink:#0e1726;--muted:#5b6673;--brand:#0b6aa2;--accent:#0a7f44;\n    --bg:#ffffff;--panel:#f6f9ff;--line:#e5edf6;--warn:#b35b00\n  }\n  .wrap{max-width:1160px;margin:0 auto;padding:16px}\n  .hero{margin:0;padding:0;border-bottom:1px solid var(--line)}\n  .hero .inner{max-width:1160px;margin:0 auto;padding:10px 16px}\n  .tag{display:inline-block;background:var(--panel);border:1px solid var(--line);padding:2px 10px;border-radius:999px;font-size:.82rem;color:var(--muted);margin-right:8px}\n  p,li{color:var(--ink);line-height:1.78}\n  a{color:var(--brand);text-decoration:none}\n  a:hover{text-decoration:underline}\n  .sec{margin:24px 0}\n  .h{font-weight:800;margin:6px 0 10px}\n  .grid{display:grid;gap:18px}\n  @media(min-width:780px){.g2{grid-template-columns:1fr 1fr}.g3{grid-template-columns:repeat(3,1fr)}}\n  .card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}\n  .ok{border-left:4px solid var(--accent);padding-left:12px}\n  .warn{background:#fff8ee;border:1px solid #ffe0ba}\n  table{width:100%;border-collapse:collapse;border:1px solid var(--line);background:#fff;margin:12px 0}\n  th,td{border-bottom:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}\n  th{background:#f8fbff}\n  figure{margin:14px 0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}\n  figcaption{padding:8px 12px;border-top:1px solid var(--line);font-size:.92rem;color:var(--muted)}\n  img.resp{display:block;max-width:100%;height:auto;border-radius:10px}\n  .chips{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0}\n  .chip{background:#fff;border:1px solid var(--line);padding:8px 10px;border-radius:10px}\n  .mini{font-size:.92rem;color:var(--muted)}\n  .faq .q{font-weight:700;margin:8px 0 6px}\n  .entry-content > *:first-child, .elementor-widget-container > *:first-child { margin-top:0 !important }\n<\/style>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\":\"https:\/\/schema.org\",\n  \"@graph\":[\n    {\n      \"@type\":\"Article\",\n      \"headline\":\"PTFE Washers vs. Other Washer Materials: A Comparative, Data\u2011Led Review for Global Engineers (2025)\",\n      \"inLanguage\":\"en\",\n      \"datePublished\":\"2025-10-08\",\n      \"dateModified\":\"2025-10-08\",\n      \"author\":{\"@type\":\"Organization\",\"name\":\"SPARTA SEALING\"},\n      \"publisher\":{\"@type\":\"Organization\",\"name\":\"SPARTA SEALING\"},\n      \"about\":[\"PTFE washer vs metal washers\",\"PTFE vs nylon vs PEEK\",\"isolation washers\",\"chemical resistance comparison\"],\n      \"keywords\":\"PTFE washer differences, Teflon washer vs steel, PTFE vs nylon, PTFE vs PEEK, dielectric spacer, cold flow, creep relaxation, torque retention, chemical resistance, gasket materials\",\n      \"articleSection\":[\"Summary\",\"Material comparison\",\"Performance data\",\"Use\u2011case decisions\",\"Design implications\",\"Compliance & QA\",\"Cost model\"],\n      \"citation\":[\"https:\/\/www.astm.org\/\",\"https:\/\/www.iso.org\/\",\"https:\/\/www.fda.gov\/\"]\n    },\n    {\n      \"@type\":\"FAQPage\",\n      \"mainEntity\":[\n        {\"@type\":\"Question\",\"name\":\"How do PTFE washers differ from stainless steel washers?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"PTFE provides chemical and electrical isolation with very low friction; stainless offers high strength and minimal creep but no chemical isolation. PTFE is chosen for corrosive media or insulation; stainless for high clamp and structural duty.\"}},\n        {\"@type\":\"Question\",\"name\":\"PTFE vs. nylon: which is better outdoors?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"PTFE resists UV and moisture with negligible water uptake, while nylon absorbs moisture and softens, narrowing tolerance control. PTFE is generally preferred for outdoor chemical and dimensional stability.\"}},\n        {\"@type\":\"Question\",\"name\":\"When is PEEK a better choice than PTFE?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Use PEEK when high stiffness, low creep, and tight tolerances are critical under load and temperature; select PTFE for extreme chemical resistance and low friction at lower loads.\"}},\n        {\"@type\":\"Question\",\"name\":\"Do filled PTFE grades remove cold flow completely?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. They reduce creep substantially but do not eliminate it. Backup washers and proper geometry are still recommended.\"}},\n        {\"@type\":\"Question\",\"name\":\"Can PTFE replace elastomer gaskets?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not directly. Washers distribute load and provide micro\u2011sealing; leak\u2011tight, cycling joints typically need gasket materials with elastic recovery or PTFE\u2011jacketed elastomers.\"}},\n        {\"@type\":\"Question\",\"name\":\"What standards apply to property data in this comparison?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Common methods include ASTM D638 (tensile), D792 (density), D2240 (hardness), D149 (dielectric), and F38 (creep relaxation).\"}}\n      ]\n    }\n  ]\n}\n<\/script><\/p>\n<div class=\"hero\">\n<div class=\"inner\">\n    <span class=\"tag\">Comparative analysis<\/span><br \/>\n    <span class=\"tag\">Global audience<\/span><br \/>\n    <span class=\"tag\">Updated 2025<\/span><\/p>\n<p class=\"mini\">A head\u2011to\u2011head review of PTFE washers against stainless steel, brass, nylon, PEEK, fiber\/laminates, and elastomer\u2011backed designs. The focus is on measurable differences: chemical resistance, friction, creep, dielectric behavior, and lifecycle cost.<\/p>\n<\/p><\/div>\n<\/div>\n<p><main class=\"wrap\"><\/p>\n<section class=\"sec\">\n<p class=\"h\">Executive summary: where PTFE stands out<\/p>\n<ul>\n<li>Near\u2011universal chemical resistance and negligible water uptake (<0.01%\/24 h) give PTFE an edge in corrosive or sanitary environments.<\/li>\n<li>Low surface energy delivers a friction coefficient around 0.05\u20130.10 vs polished steel\u2014useful for anti\u2011galling and controlled slip.<\/li>\n<li>Trade\u2011off: creep (cold flow) under sustained load; mitigated with glass\/carbon\/bronze fillers and backup washers.<\/li>\n<li>Electrical isolation performance (dielectric strength ~60\u2013100 kV\/mm) is significantly higher than metals and higher than many engineering plastics in wet service.<\/li>\n<\/ul>\n<p class=\"mini\">For engineered selections and custom cuts, see <a href=\"https:\/\/spartaseal.com\/\" rel=\"nofollow\">SPARTA SEALING<\/a> or the company profile of the <a href=\"https:\/\/spartaseal.com\/about\/\" rel=\"nofollow\">seal company<\/a>.<\/p>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Side\u2011by\u2011side material comparison<\/p>\n<table>\n<thead>\n<tr>\n<th>Washer material<\/th>\n<th>Chemical resistance<\/th>\n<th>Typical friction vs. steel<\/th>\n<th>Creep\/elastic recovery<\/th>\n<th>Electrical behavior<\/th>\n<th>Temperature window (continuous)<\/th>\n<th>Core advantages<\/th>\n<th>Typical drawbacks<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>PTFE (virgin)<\/td>\n<td>Excellent (most acids\/bases\/solvents)<\/td>\n<td>0.05\u20130.10<\/td>\n<td>High creep; no elastic recovery<\/td>\n<td>Insulating, high resistivity<\/td>\n<td>\u2212200 to +260 \u00b0C<\/td>\n<td>Non\u2011stick, sanitary, dielectric<\/td>\n<td>Torque relaxation; needs larger bearing area<\/td>\n<\/tr>\n<tr>\n<td>PTFE (filled)<\/td>\n<td>Very good<\/td>\n<td>0.08\u20130.20<\/td>\n<td>Reduced creep<\/td>\n<td>Insulating (slightly lower)<\/td>\n<td>\u2212200 to +260 \u00b0C<\/td>\n<td>Better preload stability<\/td>\n<td>Abrasive; chemical window narrows (bronze)<\/td>\n<\/tr>\n<tr>\n<td>Stainless steel (304\/316)<\/td>\n<td>Good to excellent (not universal)<\/td>\n<td>High (galling risk)<\/td>\n<td>Very low creep; structural<\/td>\n<td>Conductive<\/td>\n<td>\u2212200 to +400 \u00b0C+<\/td>\n<td>High clamp, durability<\/td>\n<td>No chemical\/electrical isolation; potential corrosion<\/td>\n<\/tr>\n<tr>\n<td>Brass<\/td>\n<td>Good in water\/non\u2011oxidizing<\/td>\n<td>Medium<\/td>\n<td>Very low creep<\/td>\n<td>Conductive<\/td>\n<td>\u2212100 to +200 \u00b0C<\/td>\n<td>Machinability, cost<\/td>\n<td>Stress corrosion in ammonia; tarnish<\/td>\n<\/tr>\n<tr>\n<td>Nylon (PA6\/PA66)<\/td>\n<td>Fair; hydrolysis\/solvent limits<\/td>\n<td>Medium<\/td>\n<td>Moderate creep; absorbs moisture<\/td>\n<td>Insulating (drops when wet)<\/td>\n<td>\u221240 to +120 \u00b0C<\/td>\n<td>Low cost, light weight<\/td>\n<td>Dimensional drift, UV sensitivity<\/td>\n<\/tr>\n<tr>\n<td>PEEK<\/td>\n<td>Very good<\/td>\n<td>Medium<\/td>\n<td>Low creep; high modulus<\/td>\n<td>Insulating<\/td>\n<td>\u221250 to +250 \u00b0C<\/td>\n<td>Strength, precision, heat<\/td>\n<td>Higher price than PTFE<\/td>\n<\/tr>\n<tr>\n<td>Fiber\/laminate (G10\/FR4)<\/td>\n<td>Good<\/td>\n<td>Medium<\/td>\n<td>Low creep<\/td>\n<td>Excellent insulation<\/td>\n<td>\u221250 to +150 \u00b0C<\/td>\n<td>Rigidity, electrical<\/td>\n<td>Chemical limits; edge wicking if unsealed<\/td>\n<\/tr>\n<tr>\n<td>PTFE\u2011jacketed elastomer<\/td>\n<td>Face has PTFE chemical resistance<\/td>\n<td>Low<\/td>\n<td>Good elastic recovery (core)<\/td>\n<td>Insulating<\/td>\n<td>Core\u2011limited (e.g., EPDM\/FKM)<\/td>\n<td>Leak\u2011tight on rough faces<\/td>\n<td>Higher cost; thickness control<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Measured differences: property bands and test methods<\/p>\n<table>\n<thead>\n<tr>\n<th>Property<\/th>\n<th>PTFE<\/th>\n<th>Nylon<\/th>\n<th>PEEK<\/th>\n<th>Stainless<\/th>\n<th>Method\/notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Density (g\/cm\u00b3)<\/td>\n<td>2.13\u20132.20<\/td>\n<td>1.13\u20131.15<\/td>\n<td>1.30<\/td>\n<td>7.9\u20138.0<\/td>\n<td>ASTM D792 (metals by mass\/volume)<\/td>\n<\/tr>\n<tr>\n<td>Tensile strength (MPa)<\/td>\n<td>20\u201335<\/td>\n<td>60\u201380 (dry)<\/td>\n<td>90\u2013100<\/td>\n<td>>500<\/td>\n<td>ASTM D638; metals per ASTM A standards<\/td>\n<\/tr>\n<tr>\n<td>Elongation at break (%)<\/td>\n<td>200\u2013400<\/td>\n<td>40\u2013100<\/td>\n<td>20\u201350<\/td>\n<td>~40<\/td>\n<td>ASTM D638<\/td>\n<\/tr>\n<tr>\n<td>Shore hardness<\/td>\n<td>D 50\u201360<\/td>\n<td>D 70\u201380<\/td>\n<td>D 85\u201390<\/td>\n<td>\u2014<\/td>\n<td>ASTM D2240<\/td>\n<\/tr>\n<tr>\n<td>Coeff. of friction vs steel<\/td>\n<td>0.05\u20130.10<\/td>\n<td>0.2\u20130.4<\/td>\n<td>0.2\u20130.4<\/td>\n<td>0.5\u20130.8 (dry)<\/td>\n<td>ASTM D1894 (analogous)<\/td>\n<\/tr>\n<tr>\n<td>Water absorption 24 h (%)<\/td>\n<td><0.01<\/td>\n<td>1\u20132+<\/td>\n<td>0.1<\/td>\n<td>0<\/td>\n<td>ASTM D570<\/td>\n<\/tr>\n<tr>\n<td>Dielectric strength (kV\/mm)<\/td>\n<td>60\u2013100<\/td>\n<td>15\u201330 (drops when wet)<\/td>\n<td>20\u201325<\/td>\n<td>Conductive<\/td>\n<td>ASTM D149<\/td>\n<\/tr>\n<tr>\n<td>Continuous service temp (\u00b0C)<\/td>\n<td>\u2212200\u2026260<\/td>\n<td>\u221240\u2026120<\/td>\n<td>\u221250\u2026250<\/td>\n<td>\u2212200\u2026400+<\/td>\n<td>Manufacturer data\/standards<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"mini\">Bands represent common datasheet ranges; confirm with supplier certificates before final design.<\/p>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Decision tree: choosing between PTFE and the rest<\/p>\n<div class=\"grid g2\">\n<div class=\"card ok\">\n<p class=\"h\">Choose PTFE when<\/p>\n<ul>\n<li>Process media include acids, bases, halogenated solvents, or cleaning agents where nylons\/PEEK may swell or stress\u2011crack.<\/li>\n<li>Electrical isolation and non\u2011wetting surfaces are critical (sensors, RF hardware, mixed\u2011metal joints).<\/li>\n<li>Cryogenic service or rapid temperature swings demand low brittleness and moisture immunity.<\/li>\n<\/ul><\/div>\n<div class=\"card\">\n<p class=\"h\">Choose a different material when<\/p>\n<ul>\n<li>High clamp with minimal relaxation is mandatory\u2014prefer stainless or PEEK, or use filled PTFE with steel backups.<\/li>\n<li>Leak\u2011tight cyclic sealing is required\u2014use PTFE\u2011jacketed elastomer or expanded PTFE gaskets rather than plain washers.<\/li>\n<li>Sliding PV is high and continuous\u2014use filled PTFE bearing grades or engineered bearing polymers.<\/li>\n<\/ul><\/div>\n<\/p><\/div>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Design implications unique to PTFE<\/p>\n<ul>\n<li>Geometry: larger OD\/ID ratios (\u22651.8) for virgin PTFE under high preload; 1.5 may suffice with filled grades.<\/li>\n<li>Backup hardware: a stainless or coated steel washer under the nut\/bolt head raises interface friction and curbs creep.<\/li>\n<li>Surface prep: keep Ra \u2264 3.2 \u03bcm; deburr edges; avoid sharp transitions that seed extrusion.<\/li>\n<li>Retorque plan: inspect after first heat\u2011soak or 24\u201348 hours; ASTM F38 creep\u2011relaxation tests help set maintenance intervals.<\/li>\n<\/ul>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Compliance and QA differences<\/p>\n<table>\n<thead>\n<tr>\n<th>Topic<\/th>\n<th>PTFE (virgin)<\/th>\n<th>Alternatives<\/th>\n<th>What to verify<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Food\/pharma use<\/td>\n<td>Common path via FDA 21 CFR 177.1550; EU 10\/2011<\/td>\n<td>Nylon\/PEEK may qualify; metals depend on passivation<\/td>\n<td>Migration\/extractables, pigment approvals<\/td>\n<\/tr>\n<tr>\n<td>Electrical isolation<\/td>\n<td>High dielectric, low moisture uptake<\/td>\n<td>Nylon loses insulation when wet; metals conduct<\/td>\n<td>ASTM D149\/D257 data; humidity effects<\/td>\n<\/tr>\n<tr>\n<td>Traceability<\/td>\n<td>Resin grade + filler % certificates standard practice<\/td>\n<td>Metals: alloy certs; polymers: grade sheets<\/td>\n<td>Lot numbers, sintering profiles (PTFE)<\/td>\n<\/tr>\n<tr>\n<td>Environmental durability<\/td>\n<td>UV and chemicals stable<\/td>\n<td>Nylon UV\u2011sensitive; brass stress\u2011corrosion risks<\/td>\n<td>Outdoor aging data, corrosion tests<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Cost and lifecycle: normalized view (M10, indicative)<\/p>\n<table>\n<thead>\n<tr>\n<th>Material<\/th>\n<th>Unit price<\/th>\n<th>Expected retention of preload<\/th>\n<th>Maintenance profile<\/th>\n<th>Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>PTFE virgin<\/td>\n<td>$0.25\u2013$0.80<\/td>\n<td>Low\u2013medium (requires retorque)<\/td>\n<td>Inspect after first cycle; periodic checks<\/td>\n<td>Best for purity\/chemicals<\/td>\n<\/tr>\n<tr>\n<td>PTFE filled (glass\/carbon)<\/td>\n<td>$0.40\u2013$1.30<\/td>\n<td>Medium\u2013high<\/td>\n<td>Less frequent retorque<\/td>\n<td>Abrasiveness management needed<\/td>\n<\/tr>\n<tr>\n<td>Stainless 304\/316<\/td>\n<td>$0.05\u2013$0.30<\/td>\n<td>High<\/td>\n<td>Minimal; monitor corrosion in chlorides<\/td>\n<td>No insulation or chemical barrier<\/td>\n<\/tr>\n<tr>\n<td>Nylon<\/td>\n<td>$0.03\u2013$0.15<\/td>\n<td>Low\u2013medium (moisture\u2011dependent)<\/td>\n<td>Dimensional checks in humidity<\/td>\n<td>Budget isolation where media benign<\/td>\n<\/tr>\n<tr>\n<td>PEEK<\/td>\n<td>$0.60\u2013$2.50<\/td>\n<td>High<\/td>\n<td>Low maintenance<\/td>\n<td>Premium strength and temperature<\/td>\n<\/tr>\n<tr>\n<td>PTFE\u2011jacketed elastomer<\/td>\n<td>$1.20\u2013$3.50<\/td>\n<td>High (elastic core)<\/td>\n<td>Inspect core compatibility<\/td>\n<td>Best for leak\u2011tight faces<\/td>\n<\/tr>\n<\/tbody>\n<tfoot>\n<tr>\n<td colspan=\"5\">Prices reflect 2024\u20132025 industrial catalogs; volume and tolerance tightenings shift costs.<\/td>\n<\/tr>\n<\/tfoot>\n<\/table>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Illustrative image: washer stack\u2011up<\/p>\n<figure>\n      <img decoding=\"async\" class=\"resp\" loading=\"lazy\" src=\"https:\/\/dummyimage.com\/1200x675\/e5edf6\/0b6aa2.png&#038;text=Steel+backup+%7C+PTFE+washer+%7C+Mating+face\" alt=\"Placeholder photo showing a steel backup washer, a PTFE washer, and a mating face in a bolted joint\" width=\"1200\"><figcaption>Adding a steel backup washer improves torque hold and reduces PTFE creep\u2014one of the main differences versus metals or PEEK that need no backup for preload stability.<\/figcaption><\/figure>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Practical selection checklist<\/p>\n<ol>\n<li>Map media and temperature: if aggressive chemicals or sterilization agents are present, bias toward PTFE.<\/li>\n<li>Define preload and tolerance to relaxation: for high clamp, prefer filled PTFE, PEEK, or metals; add backups when choosing PTFE.<\/li>\n<li>Set electrical\/galvanic goals: PTFE or laminates for insulation; metals when conductivity is required.<\/li>\n<li>Assess sealing need: for cycling or rough faces, use PTFE\u2011jacketed elastomer instead of plain washers.<\/li>\n<li>Verify compliance: FDA\/EU statements for sanitary uses; ASTM data for mechanical and dielectric properties.<\/li>\n<li>Specify QA: lot traceability, sintering profile (PTFE), and dimensional tolerances suitable to your stack\u2011up.<\/li>\n<\/ol>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">Supplier engagement<\/p>\n<p>When engaging suppliers, request resin grade, filler percentage, and creep\u2011relaxation data (ASTM F38) for PTFE; ask for alloy\/passivation data for stainless; and for nylon\/PEEK, obtain moisture conditioning and thermal derating curves. For engineered help and custom geometries, consult <a href=\"https:\/\/spartaseal.com\/\" rel=\"nofollow\">SPARTA SEALING<\/a>, whose <a href=\"https:\/\/spartaseal.com\/about\/\" rel=\"nofollow\">seal company<\/a> page outlines R&#038;D, manufacturing, and service capabilities.<\/p>\n<\/section>\n<section class=\"sec faq\">\n<p class=\"h\">Frequently asked questions<\/p>\n<div class=\"card\">\n<div class=\"q\">Is PTFE always superior to nylon in water?<\/div>\n<div>Yes for dimensional and dielectric stability\u2014PTFE\u2019s water uptake is negligible, while nylon absorbs water and softens, altering preload and insulation.<\/div>\n<\/div>\n<div class=\"card\">\n<div class=\"q\">How does PTFE compare to stainless under vibration?<\/div>\n<div>Stainless retains preload much better due to negligible creep. PTFE needs larger bearing areas, filled grades, and backup washers to approach similar stability.<\/div>\n<\/div>\n<div class=\"card\">\n<div class=\"q\">What about UV exposure?<\/div>\n<div>PTFE is UV\u2011resistant with minimal degradation; nylon can embrittle without stabilizers; stainless is unaffected but may discolor in aggressive atmospheres.<\/div>\n<\/div>\n<div class=\"card\">\n<div class=\"q\">Can PTFE be colored for identification?<\/div>\n<div>It can, but sanitary or FDA\u2011regulated zones often require natural white virgin PTFE or documented pigments to control extractables.<\/div>\n<\/div>\n<div class=\"card\">\n<div class=\"q\">Is PEEK overkill for simple isolation?<\/div>\n<div>Often yes. PEEK is ideal when high stiffness and tight tolerances are critical; PTFE offers better chemical margin at lower cost for basic isolation.<\/div>\n<\/div>\n<div class=\"card\">\n<div class=\"q\">Does bronze\u2011filled PTFE corrode?<\/div>\n<div>The bronze filler can reduce chemical resistance in aggressive media; evaluate compatibility and consider glass\/carbon fills if exposure is harsh.<\/div>\n<\/div>\n<\/section>\n<section class=\"sec\">\n<p class=\"h\">References and attribution<\/p>\n<ul class=\"mini\">\n<li>ASTM: D4894\/D4895 (PTFE resins), D638 (tensile), D2240 (hardness), D792 (density), D149 (dielectric), D570 (water absorption), F38 (creep relaxation) \u2014 https:\/\/www.astm.org\/<\/li>\n<li>ISO materials and tribology references \u2014 https:\/\/www.iso.org\/<\/li>\n<li>FDA 21 CFR 177.1550 \u2014 perfluorocarbon resins for food contact \u2014 https:\/\/www.fda.gov\/<\/li>\n<\/ul>\n<p class=\"mini\">This comparison consolidates consensus ranges and practices reflected across high\u2011ranking technical datasheets and standards accessible via Google Search in 2024\u20132025. Text is original and not copied. For custom programs and verified documentation, visit <a href=\"https:\/\/spartaseal.com\/\" rel=\"nofollow\">SPARTA SEALING<\/a> or the company\u2019s <a href=\"https:\/\/spartaseal.com\/about\/\" rel=\"nofollow\">seal company<\/a> overview.<\/p>\n<\/section>\n<p><\/main><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u041e\u0431\u0437\u043e\u0440 \u0448\u0430\u0439\u0431 \u0438\u0437 \u041f\u0422\u0424\u042d \u0432 \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0438 \u0441 \u0448\u0430\u0439\u0431\u0430\u043c\u0438 \u0438\u0437 \u043d\u0435\u0440\u0436\u0430\u0432\u0435\u044e\u0449\u0435\u0439 \u0441\u0442\u0430\u043b\u0438, \u043b\u0430\u0442\u0443\u043d\u0438, \u043d\u0435\u0439\u043b\u043e\u043d\u0430, \u041f\u042d\u042d\u041a, \u0432\u043e\u043b\u043e\u043a\u043e\u043d\/\u043b\u0430\u043c\u0438\u043d\u0430\u0442\u043e\u0432 \u0438 \u044d\u043b\u0430\u0441\u0442\u043e\u043c\u0435\u0440\u043e\u0432. \u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0435 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435 \u0443\u0434\u0435\u043b\u044f\u0435\u0442\u0441\u044f \u0438\u0437\u043c\u0435\u0440\u044f\u0435\u043c\u044b\u043c \u0440\u0430\u0437\u043b\u0438\u0447\u0438\u044f\u043c: \u0445\u0438\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0441\u0442\u043e\u0439\u043a\u043e\u0441\u0442\u0438, \u0442\u0440\u0435\u043d\u0438\u044e, \u043f\u043e\u043b\u0437\u0443\u0447\u0435\u0441\u0442\u0438, \u0434\u0438\u044d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u043c \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430\u043c \u0438 \u0441\u0442\u043e\u0438\u043c\u043e\u0441\u0442\u0438 \u0436\u0438\u0437\u043d\u0435\u043d\u043d\u043e\u0433\u043e \u0446\u0438\u043a\u043b\u0430.<\/p>","protected":false},"author":1,"featured_media":349,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[27],"tags":[],"class_list":["post-332","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seals-knowledge"],"_links":{"self":[{"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/posts\/332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/comments?post=332"}],"version-history":[{"count":2,"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/posts\/332\/revisions"}],"predecessor-version":[{"id":350,"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/posts\/332\/revisions\/350"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/media\/349"}],"wp:attachment":[{"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/media?parent=332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/categories?post=332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spartaseal.com\/ru\/wp-json\/wp\/v2\/tags?post=332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}