{"id":1310,"date":"2022-08-08T16:37:29","date_gmt":"2022-08-08T08:37:29","guid":{"rendered":"https:\/\/limegreen-okapi-448594.hostingersite.com\/?page_id=1310"},"modified":"2026-07-27T18:21:36","modified_gmt":"2026-07-27T10:21:36","slug":"valve-life-testing","status":"publish","type":"page","link":"https:\/\/raymonvalve.com\/fr\/valve-life-testing\/","title":{"rendered":"Tests de dur\u00e9e de vie et d'endurance des vannes"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1310\" class=\"elementor elementor-1310\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-12b14058 e-con-full e-flex e-con e-parent\" data-id=\"12b14058\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-461b285c elementor-widget elementor-widget-html\" data-id=\"461b285c\" data-element_type=\"widget\" data-e-type=\"widget\" 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.rv-actions{margin-top:22px}}.rv-topicgrid,.rv-routegrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.rv-topic,.rv-route{padding:22px;border:1px solid var(--rv-line);border-radius:12px;background:#fff}.rv-topic b,.rv-route b{display:block;color:var(--rv-blue);margin-bottom:7px}.rv-topic p,.rv-route p{margin:0;color:#667085;font-size:14px}.rv-limitgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.rv-limit{padding:24px;border-radius:12px;background:#fff;color:#26344d}.rv-limit h3{margin:0 0 10px;color:#1f29bd;font-size:19px}.rv-limit p{margin:0;font-size:14px}.rv-trust{padding:26px;border:1px solid var(--rv-line);border-left:5px solid var(--rv-blue);border-radius:10px;background:#f8faff}.rv-trustgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px 30px}.rv-trust b{display:block;color:var(--rv-ink);margin-bottom:5px}.rv-trust p{margin:0;color:#667085;font-size:14px}.rv-trustlinks{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.rv-trustlinks a{color:var(--rv-blue);font-size:13px;font-weight:800}body.page-id-1310 #content,body.page-id-1310 .site-content,body.page-id-1310 #primary,body.page-id-1310 #main,body.page-id-1310 .entry-content{margin-top:0!important;padding-top:0!important}body.page-id-1310 .site-content>.ast-container{max-width:100%!important;padding-left:0!important;padding-right:0!important}@media(max-width:980px){.rv-topicgrid,.rv-routegrid,.rv-limitgrid{grid-template-columns:1fr 1fr}}@media(max-width:640px){.rv-topicgrid,.rv-routegrid,.rv-limitgrid,.rv-trustgrid{grid-template-columns:1fr}}<\/style><main class=\"rv-cat\">\n<section class=\"rv-hero\"><div class=\"rv-wrap\"><div class=\"rv-crumb\"><a href=\"\/\">Home<\/a> \/ <a href=\"\/support\/\">Resources<\/a> \/ Valve Cycle Life and Endurance Testing<\/div><div class=\"rv-kicker\" style=\"color:#f3cc18\">Endurance claims tied to a defined operating cycle<\/div><h1 class=\"rv-title\">Valve Cycle Life Testing: Duty Profile, Failure Criteria and Evidence<\/h1><p>A valve cycle-life claim has no engineering meaning until one cycle, the applied pressure differential, temperature, media, speed, dwell, actuator settings, maintenance rules and failure criteria are defined. Endurance testing can compare designs or qualify a configuration for a stated duty, but accelerated laboratory cycling may not reproduce corrosion, solids, thermal transients or field installation loads. A useful protocol connects the operating profile to the actual application and records performance drift throughout the test, not only a final open\/close count. Baseline and interval data also reveal whether performance degraded gradually or failed suddenly.<\/p><div class=\"rv-actions\"><a class=\"rv-btn rv-primary\" href=\"\/contact\/\">Request Technical Review<\/a><a class=\"rv-btn rv-ghost\" href=\"#technical-scope\">Open Technical Scope<\/a><\/div><div class=\"rv-pills\"><span class=\"rv-pill\">Defined duty cycle<\/span><span class=\"rv-pill\">Load and environment<\/span><span class=\"rv-pill\">Performance trending<\/span><span class=\"rv-pill\">Failure-mode inspection<\/span><\/div><\/div><\/section>\n<section id=\"technical-scope\" class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Technical scope<\/div><h2 class=\"rv-h2\">Specify the operating cycle before specifying a cycle count<\/h2><div class=\"rv-topicgrid\"><div class=\"rv-topic\"><b>Cycle definition<\/b><p>State start\/end positions, stroke limits, opening\/closing sequence, dwell and whether partial strokes count.<\/p><\/div><div class=\"rv-topic\"><b>Differential pressure<\/b><p>Define pressure and flow during movement, seating and unseating; no-load cycling can miss dominant wear mechanisms.<\/p><\/div><div class=\"rv-topic\"><b>Temperature and media<\/b><p>Use representative conditions or state the limitations of substitutes for corrosive, erosive, cryogenic or hot service.<\/p><\/div><div class=\"rv-topic\"><b>Actuation settings<\/b><p>Record torque\/thrust limits, speed, control logic, fail action and any adjustments during the program.<\/p><\/div><div class=\"rv-topic\"><b>Interim inspections<\/b><p>Trend leakage, operating torque, travel time, packing behavior and external condition at planned intervals.<\/p><\/div><div class=\"rv-topic\"><b>End-of-test analysis<\/b><p>Disassemble where required and document seats, stem\/shaft, bearings, seals, coating and wear locations against acceptance criteria.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Evidence matrix<\/div><h2 class=\"rv-h2\">Translate field duty into a controlled endurance protocol<\/h2><div class=\"rv-tablewrap\"><table class=\"rv-table\"><thead><tr><th>Duty input<\/th><th>Protocol decision<\/th><th>Data to trend<\/th><th>Risk if omitted<\/th><\/tr><\/thead><tbody><tr><td>Operating frequency<\/td><td>Cycle rate, dwell and total duration without unrealistic heating or lubrication effects.<\/td><td>Cycle count, timestamps, component temperature and interruptions.<\/td><td>Accelerated test may create or hide wear mechanisms unlike service.<\/td><\/tr><tr><td>Pressure\/flow profile<\/td><td>Differential during movement and closure, direction, pump\/system interaction and seat load.<\/td><td>Upstream\/downstream pressure, flow where relevant and torque\/thrust.<\/td><td>No-load cycling can overstate endurance and underrepresent seat or bearing load.<\/td><\/tr><tr><td>Temperature history<\/td><td>Steady, cyclic or transient temperature and stabilization requirements.<\/td><td>Valve\/body\/ambient temperature and thermal cycle count.<\/td><td>Seal relaxation, thermal expansion and material behavior may be missed.<\/td><\/tr><tr><td>Media and contamination<\/td><td>Actual fluid or justified substitute, cleanliness and particles\/solids dosing.<\/td><td>Fluid condition, filtration, solids concentration and change intervals.<\/td><td>Compatibility, erosion, deposition or lubrication behavior may not be represented.<\/td><\/tr><tr><td>Actuator\/control behavior<\/td><td>Power source, speed, limits, fail action, position feedback and allowed adjustment.<\/td><td>Current\/pressure, stroke time, position, alarms and setting changes.<\/td><td>An oversized or repeatedly adjusted actuator can conceal valve degradation.<\/td><\/tr><tr><td>Acceptance and teardown<\/td><td>Leakage, operability, external containment, dimensional wear and component condition.<\/td><td>Baseline\/interim\/final measurements, photographs and failed-cycle history.<\/td><td>A final cycle count alone gives no evidence of functional performance.<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Engineering evidence<\/div><h2 class=\"rv-h2\">Evidence that supports a bounded life-test conclusion<\/h2><div class=\"rv-routegrid\"><div class=\"rv-route\"><b>Test article identity<\/b><p>Size, class, materials, seats, packing, bearings and actuator match the claimed design.<\/p><\/div><div class=\"rv-route\"><b>Baseline performance<\/b><p>Leakage, torque\/thrust, stroke time and condition are recorded before cycling.<\/p><\/div><div class=\"rv-route\"><b>Continuous controls<\/b><p>Cycle, pressure, temperature and actuator data demonstrate the intended duty was applied.<\/p><\/div><div class=\"rv-route\"><b>Maintenance log<\/b><p>Lubrication, packing adjustment, repairs and pauses remain visible in the result.<\/p><\/div><div class=\"rv-route\"><b>Failure criteria<\/b><p>Leakage, loss of travel, torque rise, external leakage or damage triggers are defined in advance.<\/p><\/div><div class=\"rv-route\"><b>Coverage statement<\/b><p>The report explains what sizes, variants and services the tested configuration can support.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Technical boundaries<\/div><h2 class=\"rv-h2\">Claims and shortcuts this page does not support<\/h2><div class=\"rv-limitgrid\"><div class=\"rv-limit\"><h3>Cycle count without duty is marketing, not engineering evidence<\/h3><p>The loads, environment, speed, maintenance and acceptance criteria determine what the count represents.<\/p><\/div><div class=\"rv-limit\"><h3>Accelerated cycling can change the failure mechanism<\/h3><p>Heat generation, inadequate dwell or unrealistic fluid conditions can make results non-representative.<\/p><\/div><div class=\"rv-limit\"><h3>One successful specimen does not establish statistical reliability<\/h3><p>Sample size, manufacturing variation and confidence objectives must be defined when reliability claims are required.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Controlled workflow<\/div><h2 class=\"rv-h2\">From requirement to auditable evidence<\/h2><div class=\"rv-flow\"><div class=\"rv-step\"><b>1. Describe the field mission<\/b><span>Document cycles, pressure, temperature, media, speed, control and maintenance.<\/span><\/div><div class=\"rv-step\"><b>2. Define the qualification claim<\/b><span>State the exact design family and performance the test is intended to support.<\/span><\/div><div class=\"rv-step\"><b>3. Approve the protocol<\/b><span>Set cycle definition, loads, monitoring, intervals, failures and deviations.<\/span><\/div><div class=\"rv-step\"><b>4. Record baseline and run<\/b><span>Capture performance before testing and maintain traceable continuous\/interim data.<\/span><\/div><div class=\"rv-step\"><b>5. Control interruptions<\/b><span>Document every adjustment, repair, instrument issue and unplanned stop.<\/span><\/div><div class=\"rv-step\"><b>6. Inspect and issue conclusion<\/b><span>Analyze results and teardown evidence, then state coverage and limitations.<\/span><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Project checklist<\/div><h2 class=\"rv-h2\">Information and records to define<\/h2><div class=\"rv-check\"><div>Application duty profile and annual\/mission cycles<\/div><div>Definition of one full or partial cycle<\/div><div>Pressure differential, flow direction and seat load<\/div><div>Media, cleanliness\/solids and temperature history<\/div><div>Actuator sizing, settings, power and stroke speed<\/div><div>Baseline\/interim leakage, torque and travel measurements<\/div><div>Failure criteria, maintenance and interruption log<\/div><div>Final teardown, coverage statement and raw-data package<\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Technical authority and scope<\/div><h2 class=\"rv-h2\">How this resource should be used<\/h2><div class=\"rv-trust\"><div class=\"rv-trustgrid\"><div><b>Primary search intent<\/b><p>Engineering guidance for specifying valve cycle-life or endurance tests and evaluating what a reported cycle count actually demonstrates.<\/p><\/div><div><b>Technical content owner<\/b><p>Raymon Valve technical content team. Final project decisions require the controlled documents and responsible engineer or quality reviewer.<\/p><\/div><div><b>Standards boundary<\/b><p>The valve product standard, project qualification specification and approved endurance protocol control. This page makes no universal cycle-life claim and does not equate accelerated laboratory results with every field environment or valve variant.<\/p><\/div><div><b>Review status<\/b><p>Technical scope reviewed 27 July 2026. Editions, procedures, acceptance criteria and product evidence must be reconfirmed before order.<\/p><\/div><\/div><div class=\"rv-trustlinks\"><a href=\"\/support\/\">Resource Center<\/a><a href=\"\/valve-standards\/\">Valve Standards<\/a><a href=\"\/valve-inspection\/\">Inspection &amp; Testing<\/a><a href=\"\/contact\/\">Request Technical Review<\/a><\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Frequently asked questions<\/div><h2 class=\"rv-h2\">Valve Cycle Life and Endurance Testing FAQ<\/h2><div class=\"rv-faq\"><details><summary>What counts as one valve cycle?<\/summary><p>The protocol must define it. Commonly it is a complete movement from one specified end position to the other and back, but partial-stroke or one-way definitions can differ. State start, end, dwell and count logic.<\/p><\/details><details><summary>Should a valve be cycle-tested under pressure?<\/summary><p>The pressure\/flow conditions should represent the intended qualification question. No-load functional cycling may be useful, but it does not demonstrate endurance under seating, flow or differential-pressure loads.<\/p><\/details><details><summary>Can life testing predict exact field service life?<\/summary><p>Usually not by itself. It supports performance under the defined laboratory duty; corrosion, installation loads, maintenance, process transients and manufacturing variation affect actual life.<\/p><\/details><details><summary>What data should be included besides the cycle count?<\/summary><p>Include specimen configuration, duty profile, pressure\/temperature\/media, speed, actuator data, baseline\/interim\/final leakage and torque, interruptions, maintenance, failures and teardown findings.<\/p><\/details><\/div><\/div><\/section>\n<section class=\"rv-section\" style=\"padding-top:0\"><div class=\"rv-wrap\"><div class=\"rv-cta\"><div><div class=\"rv-kicker\" style=\"color:#f3cc18\">Technical evidence review<\/div><h2>Send the requirement and the evidence you need to verify<\/h2><p>We will identify the applicable scope, missing records and approval path without inventing compliance claims.<\/p><\/div><div class=\"rv-actions\"><a class=\"rv-btn rv-primary\" href=\"\/contact\/\">Request Technical Review<\/a><\/div><\/div><\/div><\/section>\n<\/main><script type=\"application\/ld+json\">[{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/raymonvalve.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Resources\",\"item\":\"https:\/\/raymonvalve.com\/support\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Valve Cycle Life and Endurance Testing\",\"item\":\"https:\/\/raymonvalve.com\/valve-life-testing\/\"}]},{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What counts as one valve cycle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The protocol must define it. 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It supports performance under the defined laboratory duty; corrosion, installation loads, maintenance, process transients and manufacturing variation affect actual life.\"}},{\"@type\":\"Question\",\"name\":\"What data should be included besides the cycle count?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Include specimen configuration, duty profile, pressure\/temperature\/media, speed, actuator data, baseline\/interim\/final leakage and torque, interruptions, maintenance, failures and teardown findings.\"}}]}]<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>A valve cycle-life claim has no engineering meaning until one cycle, the applied pressure differential, temperature, media, speed, dwell, actuator settings, maintenance rules and failure criteria are defined.<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"full-width","ast-site-content-layout":"full-width","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":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"class_list":["post-1310","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/raymonvalve.com\/fr\/wp-json\/wp\/v2\/pages\/1310","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/raymonvalve.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/raymonvalve.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/fr\/wp-json\/wp\/v2\/comments?post=1310"}],"version-history":[{"count":67,"href":"https:\/\/raymonvalve.com\/fr\/wp-json\/wp\/v2\/pages\/1310\/revisions"}],"predecessor-version":[{"id":13495,"href":"https:\/\/raymonvalve.com\/fr\/wp-json\/wp\/v2\/pages\/1310\/revisions\/13495"}],"wp:attachment":[{"href":"https:\/\/raymonvalve.com\/fr\/wp-json\/wp\/v2\/media?parent=1310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}