{"id":14479,"date":"2026-09-10T13:56:24","date_gmt":"2026-09-10T05:56:24","guid":{"rendered":"https:\/\/raymonvalve.com\/?p=14479"},"modified":"2026-09-10T13:57:57","modified_gmt":"2026-09-10T05:57:57","slug":"rising-stem-vs-non-rising-stem-gate-valve","status":"publish","type":"post","link":"https:\/\/raymonvalve.com\/de\/rising-stem-vs-non-rising-stem-gate-valve\/","title":{"rendered":"Rising Stem vs Non-Rising Stem Gate Valve: Position Indication, Installation Space, Buried Service and Maintenance"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"14479\" class=\"elementor elementor-14479\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5b3fb853 e-flex e-con-boxed e-con e-parent\" data-id=\"5b3fb853\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-218ba590 elementor-widget elementor-widget-text-editor\" data-id=\"218ba590\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t\n<p style=\"text-align: left;\"><style>\n.raymonvalve-blog-page{\n  --rv-primary:#0f4c81;\n  --rv-primary-dark:#0a355a;\n  --rv-accent:#e97824;\n  --rv-text:#263746;\n  --rv-muted:#667583;\n  --rv-bg:#f5f8fb;\n  --rv-border:#d9e3ec;\n  --rv-white:#ffffff;\n  max-width:1120px;\n  margin:0 auto;\n  color:var(--rv-text);\n  font-family:Arial,Helvetica,sans-serif;\n  font-size:16px;\n  line-height:1.72;\n  overflow-wrap:anywhere;\n}\n\n.raymonvalve-blog-page *,\n.raymonvalve-blog-page *::before,\n.raymonvalve-blog-page *::after{\n  box-sizing:border-box;\n}\n\n.raymonvalve-blog-page .rv-content{\n  width:100%;\n  max-width:820px;\n  margin:0 auto;\n}\n\n.raymonvalve-blog-page p{\n  margin:0 0 18px;\n}\n\n.raymonvalve-blog-page h2{\n  margin:46px 0 18px;\n  color:var(--rv-primary-dark);\n  font-size:30px;\n  line-height:1.3;\n  letter-spacing:-0.01em;\n}\n\n.raymonvalve-blog-page h3{\n  margin:30px 0 14px;\n  color:var(--rv-primary);\n  font-size:22px;\n  line-height:1.4;\n}\n\n.raymonvalve-blog-page ul,\n.raymonvalve-blog-page ol{\n  margin:0 0 22px 24px;\n  padding:0;\n}\n\n.raymonvalve-blog-page li{\n  margin:7px 0;\n}\n\n.raymonvalve-blog-page a{\n  color:var(--rv-primary);\n  text-decoration:underline;\n  text-decoration-thickness:1px;\n  text-underline-offset:3px;\n}\n\n.raymonvalve-blog-page a:hover,\n.raymonvalve-blog-page a:focus{\n  color:var(--rv-primary-dark);\n}\n\n.raymonvalve-blog-page a:focus-visible,\n.raymonvalve-blog-page summary:focus-visible{\n  outline:3px solid rgba(233,120,36,.35);\n  outline-offset:3px;\n}\n\n.raymonvalve-blog-page .rv-lead{\n  margin-bottom:22px;\n  font-size:19px;\n  line-height:1.72;\n  color:#1f3140;\n}\n\n.raymonvalve-blog-page .rv-note{\n  margin:24px 0;\n  padding:18px 20px;\n  border-left:4px solid var(--rv-accent);\n  border-radius:5px;\n  background:#fff7f0;\n}\n\n.raymonvalve-blog-page .rv-note strong{\n  color:#7b3d0d;\n}\n\n.raymonvalve-blog-page .rv-summary-box{\n  margin:28px 0;\n  padding:24px;\n  border:1px solid var(--rv-border);\n  border-radius:8px;\n  background:var(--rv-bg);\n}\n\n.raymonvalve-blog-page .rv-summary-box strong{\n  color:var(--rv-primary-dark);\n}\n\n.raymonvalve-blog-page .rv-scenario{\n  margin:26px 0;\n  padding:22px;\n  border:1px solid var(--rv-border);\n  border-radius:8px;\n  background:#fbfcfd;\n}\n\n.raymonvalve-blog-page .rv-scenario strong{\n  display:block;\n  margin-bottom:8px;\n  color:var(--rv-primary-dark);\n}\n\n.raymonvalve-blog-page .rv-evidence-gate{\n  margin:28px 0 34px;\n  padding:24px;\n  border:1px solid #bfd0df;\n  border-radius:8px;\n  background:#f3f7fa;\n}\n\n.raymonvalve-blog-page .rv-evidence-gate strong{\n  display:block;\n  margin-bottom:10px;\n  color:var(--rv-primary-dark);\n  font-size:18px;\n}\n\n.raymonvalve-blog-page .rv-evidence-gate ul{\n  margin-bottom:0;\n}\n\n.raymonvalve-blog-page figure{\n  margin:30px 0 38px;\n}\n\n.raymonvalve-blog-page figure img{\n  display:block;\n  width:100%;\n  max-width:100%;\n  height:auto;\n  border-radius:8px;\n}\n\n.raymonvalve-blog-page figcaption{\n  margin-top:10px;\n  color:var(--rv-muted);\n  font-size:14px;\n  line-height:1.55;\n}\n\n.raymonvalve-blog-page .raymonvalve-table-wrap{\n  width:100%;\n  margin:24px 0 34px;\n  overflow-x:auto;\n  -webkit-overflow-scrolling:touch;\n  border:1px solid var(--rv-border);\n  border-radius:8px;\n}\n\n.raymonvalve-blog-page table{\n  width:100%;\n  min-width:760px;\n  border-collapse:collapse;\n  background:var(--rv-white);\n}\n\n.raymonvalve-blog-page th,\n.raymonvalve-blog-page td{\n  padding:13px 14px;\n  border-right:1px solid var(--rv-border);\n  border-bottom:1px solid var(--rv-border);\n  vertical-align:top;\n  text-align:left;\n}\n\n.raymonvalve-blog-page tr > *:last-child{\n  border-right:0;\n}\n\n.raymonvalve-blog-page tbody tr:last-child td{\n  border-bottom:0;\n}\n\n.raymonvalve-blog-page th{\n  background:var(--rv-primary);\n  color:#fff;\n  font-weight:700;\n  line-height:1.45;\n}\n\n.raymonvalve-blog-page tbody tr:nth-child(even){\n  background:#f8fafc;\n}\n\n.raymonvalve-blog-page .rv-step{\n  margin:18px 0;\n  padding:20px;\n  border:1px solid var(--rv-border);\n  border-radius:7px;\n  background:#fff;\n}\n\n.raymonvalve-blog-page .rv-step strong{\n  display:block;\n  margin-bottom:6px;\n  color:var(--rv-primary-dark);\n  font-size:18px;\n}\n\n.raymonvalve-blog-page .rv-cta{\n  margin:50px 0 36px;\n  padding:30px;\n  border-radius:10px;\n  background:var(--rv-primary-dark);\n  color:#fff;\n}\n\n.raymonvalve-blog-page .rv-cta h2{\n  margin:0 0 14px;\n  color:#fff;\n}\n\n.raymonvalve-blog-page .rv-cta p{\n  color:#fff;\n}\n\n.raymonvalve-blog-page .rv-cta a.rv-button{\n  display:inline-block;\n  margin-top:8px;\n  padding:13px 22px;\n  border-radius:5px;\n  background:var(--rv-accent);\n  color:#fff;\n  font-weight:700;\n  line-height:1.4;\n  text-decoration:none;\n}\n\n.raymonvalve-blog-page .rv-cta a.rv-button:hover,\n.raymonvalve-blog-page .rv-cta a.rv-button:focus{\n  background:#cf6519;\n  color:#fff;\n}\n\n.raymonvalve-blog-page .rv-faq{\n  margin-bottom:28px;\n}\n\n.raymonvalve-blog-page .rv-faq details{\n  margin:12px 0;\n  border:1px solid var(--rv-border);\n  border-radius:7px;\n  background:#fff;\n}\n\n.raymonvalve-blog-page .rv-faq summary{\n  position:relative;\n  cursor:pointer;\n  padding:16px 46px 16px 18px;\n  color:var(--rv-primary-dark);\n  font-weight:700;\n  line-height:1.45;\n}\n\n.raymonvalve-blog-page .rv-faq summary::after{\n  content:\"+\";\n  position:absolute;\n  top:50%;\n  right:18px;\n  transform:translateY(-50%);\n  color:var(--rv-primary);\n  font-size:22px;\n  font-weight:400;\n}\n\n.raymonvalve-blog-page .rv-faq details[open] summary::after{\n  content:\"\u2212\";\n}\n\n.raymonvalve-blog-page .rv-faq .rv-faq-answer{\n  padding:0 18px 18px;\n}\n\n.raymonvalve-blog-page .rv-faq .rv-faq-answer p:last-child{\n  margin-bottom:0;\n}\n\n@media(max-width:767px){\n  .raymonvalve-blog-page{\n    padding:0 16px;\n    font-size:16px;\n  }\n\n  .raymonvalve-blog-page h2{\n    margin-top:38px;\n    font-size:25px;\n  }\n\n  .raymonvalve-blog-page h3{\n    margin-top:26px;\n    font-size:20px;\n  }\n\n  .raymonvalve-blog-page .rv-lead{\n    font-size:17px;\n  }\n\n  .raymonvalve-blog-page .rv-note,\n  .raymonvalve-blog-page .rv-summary-box,\n  .raymonvalve-blog-page .rv-scenario,\n  .raymonvalve-blog-page .rv-evidence-gate,\n  .raymonvalve-blog-page .rv-step{\n    padding:18px;\n  }\n\n  .raymonvalve-blog-page .rv-cta{\n    padding:22px 20px;\n  }\n\n  .raymonvalve-blog-page .rv-cta a.rv-button{\n    display:block;\n    width:100%;\n    text-align:center;\n  }\n\n  .raymonvalve-blog-page table{\n    min-width:680px;\n    font-size:14px;\n  }\n\n  .raymonvalve-blog-page th,\n  .raymonvalve-blog-page td{\n    padding:11px 12px;\n  }\n\n  .raymonvalve-blog-page figure{\n    margin:26px 0 32px;\n  }\n}\n\n@media(max-width:420px){\n  .raymonvalve-blog-page{\n    padding:0 12px;\n  }\n\n  .raymonvalve-blog-page h2{\n    font-size:23px;\n  }\n\n  .raymonvalve-blog-page .rv-cta{\n    padding:20px 16px;\n  }\n}\n<\/style><\/p>\n<article class=\"raymonvalve-blog-page\">\n<div class=\"rv-content\">\n<p class=\"rv-lead\">A rising-stem gate valve provides a visible indication of gate travel because the stem moves axially as the valve opens, but it requires enough vertical clearance for the fully open stem. A non-rising-stem gate valve keeps the external stem height nearly fixed, which can suit restricted-headroom or some below-grade installations. The final choice should also consider position feedback, stem-thread location, maintenance access, buried-service construction and the approved operating envelope\u2014not stem type alone.<\/p>\n<p>Choosing only by the words \u201crising stem\u201d or \u201cnon-rising stem\u201d can create installation and RFQ problems. The technical review should compare the complete supplied arrangement, including approved dimensions, operator scope, indication method, maintenance envelope and any below-grade or buried-service accessories.<\/p>\n<figure><img fetchpriority=\"high\" decoding=\"async\" title=\"Rising Stem vs Non-Rising Stem Gate Valve Comparison\" src=\"https:\/\/raymonvalve.com\/wp-content\/uploads\/2026\/09\/rising-stem-vs-non-rising-stem-gate-valve-comparison.webp\" alt=\"Rising stem and non-rising stem gate valve comparison showing stem movement and installation height\" width=\"1200\" height=\"900\" data-image-status=\"live-verified\" \/>\n<figcaption>Engineering comparison of typical rising-stem and non-rising-stem gate valve arrangements. Exact internal construction and operating details should be confirmed from the approved drawing for the selected valve.<\/figcaption>\n<\/figure>\n<h2>Rising Stem vs Non-Rising Stem Gate Valve: Quick Comparison<\/h2>\n<p>The practical difference is how the stem arrangement affects position verification, required operating envelope, thread accessibility and future maintenance.<\/p>\n<div class=\"raymonvalve-table-wrap\" tabindex=\"0\" role=\"region\" aria-label=\"Rising stem versus non-rising stem gate valve comparison\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Selection Factor<\/th>\n<th scope=\"col\">Rising Stem Gate Valve<\/th>\n<th scope=\"col\">Non-Rising Stem Gate Valve<\/th>\n<th scope=\"col\">What the Buyer Should Verify<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Valve position visibility<\/td>\n<td>Stem travel usually gives a direct mechanical position cue<\/td>\n<td>External stem height normally does not indicate gate travel<\/td>\n<td>Required local or remote indication<\/td>\n<\/tr>\n<tr>\n<td>Vertical operating space<\/td>\n<td>Requires clearance for full stem travel<\/td>\n<td>More compact external operating envelope<\/td>\n<td>Approved fully open dimensional drawing<\/td>\n<\/tr>\n<tr>\n<td>Above-ground access<\/td>\n<td>Often convenient where the stem is visible and accessible<\/td>\n<td>Also possible where indication and access are adequate<\/td>\n<td>Operator and maintenance access<\/td>\n<\/tr>\n<tr>\n<td>Valve box or chamber<\/td>\n<td>May need greater chamber height<\/td>\n<td>Often easier to accommodate vertically<\/td>\n<td>Valve-box or chamber dimensions<\/td>\n<\/tr>\n<tr>\n<td>Buried installation<\/td>\n<td>Requires installation-specific review<\/td>\n<td>Often practical where vertical space is restricted<\/td>\n<td>Burial arrangement, coating, extension, sealing and access<\/td>\n<\/tr>\n<tr>\n<td>Stem thread inspection<\/td>\n<td>Often more accessible in typical outside-screw-and-yoke arrangements<\/td>\n<td>Internal thread engagement may be less directly inspectable<\/td>\n<td>Sectional drawing and stem\/thread construction<\/td>\n<\/tr>\n<tr>\n<td>Dirty or scaling media<\/td>\n<td>External stem still needs environmental protection<\/td>\n<td>Internal operating interfaces may need contamination review<\/td>\n<td>Solids, deposits, scaling or crystallization risk<\/td>\n<\/tr>\n<tr>\n<td>Actuated operation<\/td>\n<td>Visible stem travel does not replace actuator feedback<\/td>\n<td>Independent indication may be especially important<\/td>\n<td>Actuator datasheet, switches and feedback scope<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"rv-note\"><strong>Before technical approval:<\/strong> Verify the approved fully open drawing, required position indication, complete operator scope and any buried-service accessories. Do not approve the valve from the stem label, nominal size and pressure class alone.<\/div>\n<h2>What Actually Changes Between Rising-Stem and Non-Rising-Stem Designs?<\/h2>\n<p>Both arrangements are used on industrial <a href=\"https:\/\/raymonvalve.com\/gate-valves\/\">gate valves<\/a>. The distinction discussed here concerns the stem and operating arrangement rather than gate geometry, pressure rating or the complete valve design.<\/p>\n<p>For broader construction and specification decisions beyond stem arrangement, use the <a href=\"https:\/\/raymonvalve.com\/gate-valve-guide\/\">gate valve selection framework<\/a> before freezing the valve datasheet.<\/p>\n<h3>Rising Stem Gate Valve<\/h3>\n<p>In a typical rising-stem design, the stem translates axially as the gate moves. As the valve opens, a greater length of stem becomes visible above the handwheel, yoke or operator.<\/p>\n<p>Many industrial rising-stem gate valves use an outside-screw-and-yoke arrangement, or OS&amp;Y. In a typical OS&amp;Y configuration, the operating threads are externally accessible. Exact stem, stem-nut and thread construction should still be confirmed from the sectional drawing for the selected valve.<\/p>\n<h3>Non-Rising Stem Gate Valve<\/h3>\n<p>In a non-rising-stem design, the external stem height remains substantially fixed while the gate moves internally. This can reduce the required vertical operating envelope.<\/p>\n<p>Depending on the construction, the threaded operating interface may be located inside the valve body or another internal operating zone. Where solids, scale, sediment or crystallizing deposits are relevant, the actual sectional drawing and manufacturer data should be reviewed rather than applying one generic assumption to every NRS valve.<\/p>\n<figure><img decoding=\"async\" title=\"Rising vs Non-Rising Stem Gate Valve Movement\" src=\"https:\/\/raymonvalve.com\/wp-content\/uploads\/2026\/09\/rising-vs-non-rising-stem-gate-valve-movement.webp\" alt=\"Gate valve stem movement schematic comparing rising stem and non-rising stem operation\" width=\"1200\" height=\"900\" data-image-status=\"live-verified\" \/>\n<figcaption>Simplified engineering schematic showing typical external stem movement. It is explanatory and does not represent an exact Raymon Valve internal construction.<\/figcaption>\n<\/figure>\n<h2>Stem Arrangement Does Not Define Pressure-Temperature Capability<\/h2>\n<p>Rising-stem and non-rising-stem construction should not be used as a shortcut for pressure or temperature capability. Stem arrangement describes part of the operating mechanism; it does not by itself establish the valve&#8217;s allowable pressure-temperature rating or service suitability.<\/p>\n<p>Those limits depend on the complete valve design and applicable project requirements, including body and bonnet construction, materials, pressure-rating basis, trim, packing, bolting and the exact manufacturer configuration.<\/p>\n<div class=\"rv-note\"><strong>Specification boundary:<\/strong> Do not assume that a rising-stem valve is automatically a higher-pressure or higher-temperature design, or that an NRS valve is restricted to lower-pressure service. Review the exact datasheet and applicable rating requirements.<\/div>\n<h2>Position Indication: Can Operators Tell Whether the Gate Is Open or Closed?<\/h2>\n<h3>Rising Stem Provides a Useful Mechanical Position Cue<\/h3>\n<p>On a typical rising-stem design, external stem travel provides a useful visual indication of mechanical gate travel. This can simplify local operating checks on accessible valves.<\/p>\n<div class=\"rv-note\"><strong>Important distinction:<\/strong> Mechanical position indication does not prove seat tightness. A valve can reach its closed travel position while debris, seat damage or other conditions still affect leakage performance.<\/div>\n<p>If shut-off acceptance is important, the buyer should define the applicable inspection and <a href=\"https:\/\/raymonvalve.com\/valve-pressure-testing\/\">valve pressure testing<\/a> requirements separately.<\/p>\n<h3>How Is Position Indicated on a Non-Rising Stem Gate Valve?<\/h3>\n<p>Because external stem height normally stays nearly fixed, NRS valve position may need to be confirmed through the supplied operating equipment.<\/p>\n<ul>\n<li>Mechanical open\/close indicator<\/li>\n<li>Gearbox position indicator<\/li>\n<li>Limit switches<\/li>\n<li>Actuator open and closed feedback<\/li>\n<li>Position transmitter<\/li>\n<li>Remote control-system status<\/li>\n<\/ul>\n<figure><img decoding=\"async\" title=\"Gate Valve Position Indication: Rising vs Non-Rising Stem\" src=\"https:\/\/raymonvalve.com\/wp-content\/uploads\/2026\/09\/gate-valve-position-indication-rising-vs-non-rising-stem.webp\" alt=\"Gate valve position indication comparison for rising stem and non-rising stem designs\" width=\"1200\" height=\"900\" data-image-status=\"live-verified\" \/>\n<figcaption>Example position-indication methods for rising-stem and non-rising-stem gate valves. Position feedback confirms mechanical travel, not seat leakage performance.<\/figcaption>\n<\/figure>\n<h3>When Position Verification Should Be Written into the RFQ<\/h3>\n<p>Position indication should be specified rather than assumed when the valve is remotely operated, located in an inaccessible chamber, included in an operating sequence, actuated or used where incorrect status could affect plant operation.<\/p>\n<div class=\"rv-scenario\"><strong>Representative engineering scenario \u2014 missing indication scope<\/strong> An RFQ that specifies only \u201cNRS gate valve\u201d can produce technically different quotations. One supplier may include only a manual operator, while another includes a gearbox indicator or electrical position feedback. The buyer should define the required local and remote indication scope and review deviations before comparing price.<\/div>\n<h2>Installation Space: Why Closed-Valve Height Is Not Enough<\/h2>\n<p>The approved installation review should use the complete supplied assembly, not just the catalogue closed height.<\/p>\n<p>The project should verify:<\/p>\n<ul>\n<li>Closed overall height<\/li>\n<li>Fully open overall height<\/li>\n<li>Stem projection<\/li>\n<li>Handwheel or gearbox envelope<\/li>\n<li>Actuator dimensions<\/li>\n<li>Overhead piping, structure or cable trays<\/li>\n<li>Operator access<\/li>\n<li>Packing adjustment space<\/li>\n<li>Bonnet, gearbox or actuator removal space<\/li>\n<\/ul>\n<figure><img loading=\"lazy\" decoding=\"async\" title=\"Rising Stem Gate Valve Installation Clearance\" src=\"https:\/\/raymonvalve.com\/wp-content\/uploads\/2026\/09\/rising-stem-gate-valve-installation-clearance.webp\" alt=\"Rising stem gate valve installation clearance showing fully open stem and maintenance space\" width=\"1200\" height=\"900\" data-image-status=\"live-verified\" \/>\n<figcaption>Example installation-envelope review for a rising-stem gate valve. Final clearances should be taken from the approved GA or dimensional drawing for the exact supplied configuration.<\/figcaption>\n<\/figure>\n<h3>Where a Non-Rising Stem Saves Space<\/h3>\n<p>A non-rising-stem arrangement avoids the same external stem projection during opening, which can help in restricted vertical spaces. However, the complete assembly may still include a gearbox, actuator, stem extension or indicator that determines the final envelope.<\/p>\n<h3>Operating Clearance and Maintenance Clearance Are Different<\/h3>\n<p>A valve can have enough space to operate while still lacking enough room for disassembly or maintenance. Packing replacement, gearbox removal, actuator lifting and bonnet or stem work may all require additional clearance.<\/p>\n<div class=\"rv-summary-box\"><strong>Key layout rule:<\/strong> Review operating envelope, maintenance envelope and component-removal envelope separately on the approved layout.<\/div>\n<div class=\"rv-scenario\"><strong>Representative engineering scenario \u2014 fully open clearance overlooked<\/strong> A layout can accept the valve&#8217;s closed height but still interfere with full rising-stem travel. The correction is to review the approved fully open dimensional drawing before piping and structural clearances are frozen.<\/div>\n<h2>Below Grade, Valve Chamber and Direct Burial Are Not the Same<\/h2>\n<p>The terms \u201cunderground\u201d and \u201cburied\u201d are often used loosely, but they can describe very different installation conditions.<\/p>\n<div class=\"raymonvalve-table-wrap\" tabindex=\"0\" role=\"region\" aria-label=\"Below-grade gate valve installation conditions\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Installation Condition<\/th>\n<th scope=\"col\">Typical Meaning<\/th>\n<th scope=\"col\">Main Review Points<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Below grade<\/td>\n<td>The valve elevation is below ground level, but the valve may still be inside an accessible structure<\/td>\n<td>Access, clearance, drainage, environment and operation<\/td>\n<\/tr>\n<tr>\n<td>Valve chamber \/ vault<\/td>\n<td>The valve is housed inside a dedicated accessible enclosure<\/td>\n<td>Chamber dimensions, maintenance space, flooding risk and lifting access<\/td>\n<\/tr>\n<tr>\n<td>Valve box<\/td>\n<td>Limited surface access is provided mainly for operation<\/td>\n<td>Extension stem, operating nut, indication and future maintenance strategy<\/td>\n<\/tr>\n<tr>\n<td>Direct burial<\/td>\n<td>The valve body is installed in direct contact with the surrounding buried environment<\/td>\n<td>Valve construction, coating, sealing, corrosion protection, groundwater and project specification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"rv-note\"><strong>Buried-service boundary:<\/strong> A valve suitable for installation in an accessible underground chamber should not automatically be assumed suitable for direct burial.<\/div>\n<h2>Buried Service: Why \u201cUse Non-Rising Stem Underground\u201d Is Too Simple<\/h2>\n<p>Non-rising-stem gate valves are often considered for below-grade installations because the compact stem arrangement reduces external vertical travel. That advantage is relevant to layout, but it does not prove direct-burial suitability.<\/p>\n<h3>Why Non-Rising Stem Is Often Considered for Buried Installations<\/h3>\n<ul>\n<li>Reduced vertical operating envelope<\/li>\n<li>Easier accommodation in some valve boxes<\/li>\n<li>No long rising-stem projection during opening<\/li>\n<li>Possible use with extension stems<\/li>\n<li>Possible use with operating nuts or remote manual operation<\/li>\n<\/ul>\n<h3>What Must Be Checked Before Specifying Buried Service<\/h3>\n<ul>\n<li>Direct burial, valve box or accessible chamber<\/li>\n<li>Approved valve construction<\/li>\n<li>Extension-stem arrangement<\/li>\n<li>Operating nut or gearbox<\/li>\n<li>Local or remote position indication<\/li>\n<li>External coating specification<\/li>\n<li>Groundwater and water-ingress exposure<\/li>\n<li>Stem and bonnet sealing arrangement<\/li>\n<li>Future operating access<\/li>\n<li>Future inspection and maintenance access<\/li>\n<li>Applicable installation and project specification<\/li>\n<\/ul>\n<figure><img loading=\"lazy\" decoding=\"async\" title=\"Non-Rising Stem Gate Valve Buried Service Review\" src=\"https:\/\/raymonvalve.com\/wp-content\/uploads\/2026\/09\/non-rising-stem-gate-valve-buried-service-checklist.webp\" alt=\"Buried non-rising stem gate valve installation review showing valve box, extension stem and corrosion protection\" width=\"1200\" height=\"900\" data-image-status=\"live-verified\" \/>\n<figcaption>Engineering schematic for buried-service review. Stem arrangement alone does not establish suitability for direct burial.<\/figcaption>\n<\/figure>\n<h3>Can a Rising-Stem Gate Valve Be Used Below Grade?<\/h3>\n<p>A rising-stem design should not automatically be rejected because the valve elevation is below grade. Installation inside an adequately sized chamber may still provide the required stem travel, inspection access, corrosion protection and maintenance clearance.<\/p>\n<p>That condition should be distinguished from direct burial, where the complete valve construction and environmental protection require separate project review.<\/p>\n<div class=\"rv-scenario\"><strong>Representative engineering scenario \u2014 buried-service scope not normalized<\/strong> Two suppliers may both quote an NRS valve while providing different scopes. One quotation may include the specified coating, extension stem, operating nut and indicator, while another supplies only the basic valve and operator. These deviations should be normalized before technical and commercial comparison.<\/div>\n<h2>Stem Threads, Corrosion, Fouling and Operating Resistance<\/h2>\n<h3>External Threads on Typical OS&amp;Y Arrangements<\/h3>\n<p>On many rising-stem OS&amp;Y valves, operating threads are externally accessible. This can simplify visual inspection, cleaning and lubrication, but external exposure also means the stem and threads may require protection from the surrounding environment.<\/p>\n<p>Relevant environmental risks can include:<\/p>\n<ul>\n<li>Rain<\/li>\n<li>Salt-laden atmosphere<\/li>\n<li>Dust and sand<\/li>\n<li>Coating overspray<\/li>\n<li>Atmospheric corrosion<\/li>\n<li>Mechanical damage<\/li>\n<\/ul>\n<h3>Internal Thread Considerations on Non-Rising Stem Designs<\/h3>\n<p>Where operating threads or the stem nut are located in an internal operating zone, contamination risk should be reviewed against the actual process.<\/p>\n<p>Additional review may be appropriate for:<\/p>\n<ul>\n<li>Suspended solids<\/li>\n<li>Scale-forming fluids<\/li>\n<li>Sediment<\/li>\n<li>Corrosion products<\/li>\n<li>Crystallizing chemicals<\/li>\n<li>Sticky deposits<\/li>\n<li>Fouling materials<\/li>\n<\/ul>\n<p>For these services, use the supplier&#8217;s sectional drawing and product data to confirm the stem, stem nut, thread and lubrication arrangement instead of relying on the generic NRS label.<\/p>\n<h3>Does Stem Type Determine Operating Torque?<\/h3>\n<p>No. Rising versus non-rising stem arrangement alone does not provide enough information to calculate or compare operating torque.<\/p>\n<p>Actual torque or thrust can depend on:<\/p>\n<ul>\n<li>Valve size<\/li>\n<li>Differential pressure<\/li>\n<li>Gate and seat design<\/li>\n<li>Stem diameter and thread geometry<\/li>\n<li>Stem nut arrangement<\/li>\n<li>Lubrication condition<\/li>\n<li>Corrosion and deposits<\/li>\n<li>Operating frequency<\/li>\n<li>Gearbox efficiency<\/li>\n<li>Valve wear<\/li>\n<li>Temperature and actual service condition<\/li>\n<\/ul>\n<p>For an actuated gate valve, actuator matching should use the exact valve torque or thrust data together with the confirmed differential pressure, required operating time, available power or air supply and fail-action requirement.<\/p>\n<h2>Maintenance: Which Design Is Easier to Inspect and Service?<\/h2>\n<p>Neither design is universally easier to maintain. A better comparison is which components are externally inspectable, which require disassembly and whether technicians can reach them in the actual installed arrangement.<\/p>\n<h3>Rising Stem Maintenance Considerations<\/h3>\n<ul>\n<li>Stem surface condition<\/li>\n<li>Thread cleanliness<\/li>\n<li>Atmospheric corrosion<\/li>\n<li>Scoring or mechanical damage<\/li>\n<li>Lubrication condition<\/li>\n<li>Packing leakage<\/li>\n<li>Gland condition<\/li>\n<li>Stem protection<\/li>\n<\/ul>\n<h3>Non-Rising Stem Maintenance Considerations<\/h3>\n<ul>\n<li>Internal thread or stem-nut condition<\/li>\n<li>Process contamination<\/li>\n<li>Gearbox condition<\/li>\n<li>Position-indicator condition<\/li>\n<li>Valve-box accessibility<\/li>\n<li>Disassembly requirements<\/li>\n<li>Inspection frequency<\/li>\n<\/ul>\n<p>For below-grade installations, chamber or valve-box access can have a greater effect on maintainability than the stem arrangement itself.<\/p>\n<h2>Rising Stem vs Non-Rising Stem Selection Matrix<\/h2>\n<div class=\"raymonvalve-table-wrap\" tabindex=\"0\" role=\"region\" aria-label=\"Rising stem versus non-rising stem selection matrix\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Service or Installation Condition<\/th>\n<th scope=\"col\">Preliminary Direction<\/th>\n<th scope=\"col\">Engineering Review Required<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Above-ground manual isolation with good access<\/td>\n<td>Rising stem often offers useful visibility<\/td>\n<td>Confirm environment, space and maintenance access<\/td>\n<\/tr>\n<tr>\n<td>Restricted overhead clearance<\/td>\n<td>Non-rising stem often has a geometric advantage<\/td>\n<td>Check operator and removal envelope<\/td>\n<\/tr>\n<tr>\n<td>Direct visual position confirmation required<\/td>\n<td>Rising stem or independent indication<\/td>\n<td>Define local and remote indication requirement<\/td>\n<\/tr>\n<tr>\n<td>Valve box<\/td>\n<td>Non-rising stem is often practical<\/td>\n<td>Confirm extension, operation and indication<\/td>\n<\/tr>\n<tr>\n<td>Accessible below-grade chamber<\/td>\n<td>Either arrangement may be possible<\/td>\n<td>Review chamber dimensions and maintenance access<\/td>\n<\/tr>\n<tr>\n<td>Direct burial<\/td>\n<td>Do not select from stem type alone<\/td>\n<td>Confirm complete buried-service construction and project requirements<\/td>\n<\/tr>\n<tr>\n<td>Dirty or scaling medium<\/td>\n<td>Review thread location carefully<\/td>\n<td>Confirm sectional construction<\/td>\n<\/tr>\n<tr>\n<td>Remote actuation<\/td>\n<td>Either design may be used<\/td>\n<td>Confirm torque\/thrust data and feedback scope<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>Common Specification Mistakes<\/h2>\n<h3>1. Choosing NRS Only Because the Valve Is Underground<\/h3>\n<p>Below-grade location, chamber installation and direct burial should first be distinguished.<\/p>\n<h3>2. Comparing Only Closed-Valve Height<\/h3>\n<p>The approved fully open operating and maintenance envelope should be reviewed.<\/p>\n<h3>3. Treating Visible Stem Position as Proof of Shut-Off<\/h3>\n<p>Stem travel indicates mechanical position. Seat leakage acceptance requires separate verification.<\/p>\n<h3>4. Assuming Stem Type Determines Pressure or Temperature Capability<\/h3>\n<p>Pressure-temperature suitability depends on the complete rated valve construction and project requirements, not simply whether the stem rises.<\/p>\n<h3>5. Ignoring Process Contamination Around Internal Operating Parts<\/h3>\n<p>Solids, scale, sediment and crystallization may affect internal operating mechanisms depending on the exact construction.<\/p>\n<h3>6. Specifying an Actuated NRS Valve Without Position Feedback<\/h3>\n<p>Where valve status matters operationally, the operator or actuator package should include the required indication.<\/p>\n<h3>7. Forgetting Maintenance and Removal Clearance<\/h3>\n<p>Packing, gearbox, actuator and bonnet access should be reviewed before layout approval.<\/p>\n<h2>RFQ Checklist for Rising-Stem and Non-Rising-Stem Gate Valves<\/h2>\n<p>A useful RFQ should allow suppliers to quote the same technical scope rather than filling missing information with different assumptions.<\/p>\n<p>If the project specification is still being developed, define the <a href=\"https:\/\/raymonvalve.com\/gate-globe-valve-datasheets\/\">gate valve datasheet requirements<\/a> before comparing supplier quotations.<\/p>\n<div class=\"raymonvalve-table-wrap\" tabindex=\"0\" role=\"region\" aria-label=\"Gate valve RFQ checklist\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">RFQ Input<\/th>\n<th scope=\"col\">Why It Matters<\/th>\n<th scope=\"col\">What Should Be Confirmed<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Valve function<\/td>\n<td>Confirms isolation duty<\/td>\n<td>Normal operation and operating frequency<\/td>\n<\/tr>\n<tr>\n<td>Nominal size<\/td>\n<td>Affects geometry<\/td>\n<td>Exact approved dimensions<\/td>\n<\/tr>\n<tr>\n<td>Pressure class or PN<\/td>\n<td>Part of specification<\/td>\n<td>Applicable rating basis and project requirement<\/td>\n<\/tr>\n<tr>\n<td>Design pressure<\/td>\n<td>Required for service review<\/td>\n<td>Design differential where relevant<\/td>\n<\/tr>\n<tr>\n<td>Design temperature<\/td>\n<td>Affects material and sealing review<\/td>\n<td>Normal and design condition<\/td>\n<\/tr>\n<tr>\n<td>Medium<\/td>\n<td>Influences corrosion and contamination risk<\/td>\n<td>Composition, solids and deposits<\/td>\n<\/tr>\n<tr>\n<td>Stem arrangement<\/td>\n<td>Defines RS\/NRS requirement<\/td>\n<td>Required or open to supplier proposal<\/td>\n<\/tr>\n<tr>\n<td>Installation condition<\/td>\n<td>Controls access and environmental review<\/td>\n<td>Above ground, chamber, valve box or direct burial<\/td>\n<\/tr>\n<tr>\n<td>Vertical clearance<\/td>\n<td>Controls layout<\/td>\n<td>Fully open approved dimension<\/td>\n<\/tr>\n<tr>\n<td>Position indication<\/td>\n<td>Controls status verification<\/td>\n<td>Local, remote or both<\/td>\n<\/tr>\n<tr>\n<td>Operation method<\/td>\n<td>Affects supplied scope<\/td>\n<td>Handwheel, gearbox or actuator<\/td>\n<\/tr>\n<tr>\n<td>Stem extension<\/td>\n<td>Relevant below grade<\/td>\n<td>Length and operating interface<\/td>\n<\/tr>\n<tr>\n<td>External coating<\/td>\n<td>Important for environment<\/td>\n<td>Project coating specification<\/td>\n<\/tr>\n<tr>\n<td>Maintenance access<\/td>\n<td>Affects layout<\/td>\n<td>Operating and removal envelope<\/td>\n<\/tr>\n<tr>\n<td>Testing<\/td>\n<td>Defines acceptance<\/td>\n<td>Inspection\/test requirement and records<\/td>\n<\/tr>\n<tr>\n<td>Documentation<\/td>\n<td>Supports approval<\/td>\n<td>GA drawing, sectional drawing, datasheet and test records<\/td>\n<\/tr>\n<tr>\n<td>Technical deviations<\/td>\n<td>Allows quote normalization<\/td>\n<td>Supplier deviation list<\/td>\n<\/tr>\n<tr>\n<td>Project specification<\/td>\n<td>Governs final requirement<\/td>\n<td>Applicable document revision<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<figure><img loading=\"lazy\" decoding=\"async\" title=\"Rising vs Non-Rising Stem Gate Valve RFQ Checklist\" src=\"https:\/\/raymonvalve.com\/wp-content\/uploads\/2026\/09\/rising-vs-non-rising-stem-gate-valve-rfq-checklist.webp\" alt=\"RFQ checklist for selecting rising stem or non-rising stem gate valves\" width=\"1200\" height=\"900\" data-image-status=\"live-verified\" \/>\n<figcaption>Gate valve RFQ checklist for comparing rising-stem and non-rising-stem arrangements against process, installation and maintenance requirements.<\/figcaption>\n<\/figure>\n<div class=\"rv-evidence-gate\"><strong>Evidence to Request Before Technical Approval<\/strong>\n<ul>\n<li>Approved GA or dimensional drawing<\/li>\n<li>Valve sectional drawing<\/li>\n<li>Final valve datasheet<\/li>\n<li>Operator or gearbox datasheet<\/li>\n<li>Actuator datasheet when the valve is actuated<\/li>\n<li>Coating specification for relevant below-grade or buried service<\/li>\n<li>Inspection and test requirements<\/li>\n<li>Supplier technical deviation list<\/li>\n<\/ul>\n<\/div>\n<h2>Pre-PO Technical Approval Checklist<\/h2>\n<p>Before PO approval, compare the supplier datasheet, quotation, approved drawing and deviation list against the original RFQ. Two valves carrying the same RS or NRS description may still represent different supplied scopes.<\/p>\n<div class=\"raymonvalve-table-wrap\" tabindex=\"0\" role=\"region\" aria-label=\"Pre-purchase-order gate valve technical approval checklist\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Approval Item<\/th>\n<th scope=\"col\">Verification<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Stem arrangement<\/td>\n<td>Datasheet and sectional drawing identify the agreed construction<\/td>\n<\/tr>\n<tr>\n<td>Fully open height<\/td>\n<td>Approved GA or dimensional drawing fits the available envelope<\/td>\n<\/tr>\n<tr>\n<td>Position indication<\/td>\n<td>Local and remote feedback scope matches the RFQ<\/td>\n<\/tr>\n<tr>\n<td>Below-grade \/ buried scope<\/td>\n<td>Installation type, extension, operator, coating, sealing and access are defined<\/td>\n<\/tr>\n<tr>\n<td>Stem\/thread construction<\/td>\n<td>Sectional arrangement is reviewed where fouling or corrosion matters<\/td>\n<\/tr>\n<tr>\n<td>Actuation<\/td>\n<td>Operator or actuator scope matches exact valve data and service conditions<\/td>\n<\/tr>\n<tr>\n<td>Maintenance access<\/td>\n<td>Removal clearance exists for gearbox, actuator, bonnet and packing work<\/td>\n<\/tr>\n<tr>\n<td>Testing and documents<\/td>\n<td>Inspection\/test requirements and required records are identified<\/td>\n<\/tr>\n<tr>\n<td>Technical deviations<\/td>\n<td>Supplier deviations are listed, reviewed and resolved before approval<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>How to Choose Between Rising and Non-Rising Stem Gate Valves<\/h2>\n<div class=\"rv-step\"><strong>Step 1 \u2014 Define the Required Position Indication<\/strong> Decide whether visual local position is sufficient or whether gearbox indication, limit switches, actuator feedback or remote status transmission is required.<\/div>\n<div class=\"rv-step\"><strong>Step 2 \u2014 Check the Approved Installation Envelope<\/strong> Review closed height, fully open height, operator dimensions, overhead interference and maintenance-removal clearance.<\/div>\n<div class=\"rv-step\"><strong>Step 3 \u2014 Review the Exact Stem and Thread Construction<\/strong> Use the sectional drawing where atmospheric corrosion, groundwater, scale, solids, crystallization or lubrication conditions can affect operation.<\/div>\n<div class=\"rv-step\"><strong>Step 4 \u2014 Define the Actual Installation Condition<\/strong> Distinguish above ground, accessible chamber, valve box and direct burial before deciding whether the compact NRS arrangement provides a meaningful advantage.<\/div>\n<div class=\"rv-step\"><strong>Step 5 \u2014 Normalize the Supplier Scope<\/strong> Compare the operator, indication, extension, coating, testing, documentation and technical deviations before technical approval.<\/div>\n<div class=\"rv-summary-box\">The preferred stem arrangement is the one that satisfies the required position verification, approved installation envelope, process exposure, environmental condition and maintenance strategy\u2014not simply the design with the smaller catalogue height.<\/div>\n<p>For additional valve engineering articles and selection resources, see the <a href=\"https:\/\/raymonvalve.com\/knowledge-center\/\">Raymon Valve Knowledge Center<\/a>.<\/p>\n<section class=\"rv-cta\" aria-labelledby=\"rv-gate-selection-cta\">\n<h2 id=\"rv-gate-selection-cta\">Request Gate Valve Selection Review<\/h2>\n<p>Send the valve function, medium and solids information, size, pressure class or PN, design pressure and temperature, installation condition, available fully open clearance, required position indication, operation method, stem-extension requirement, coating requirement and maintenance-access constraints.<\/p>\n<p>Include the project datasheet, applicable specification and available layout drawing so the proposed stem arrangement and supplied scope can be reviewed against the actual installation requirement.<\/p>\n<a class=\"rv-button\" href=\"https:\/\/raymonvalve.com\/contact\/\">Request Gate Valve Selection Review<\/a><\/section>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"rv-faq\"><details>\n<summary>What is the main difference between a rising stem and non-rising stem gate valve?<\/summary>\n<div class=\"rv-faq-answer\">\n<p>In a rising-stem gate valve, the external stem normally moves axially with gate travel. In a non-rising-stem valve, the external stem height remains substantially fixed while the gate moves internally. The difference affects position indication, installation envelope and maintenance access.<\/p>\n<\/div>\n<\/details><details>\n<summary>How can you tell if a rising stem gate valve is open or closed?<\/summary>\n<div class=\"rv-faq-answer\">\n<p>Stem travel normally provides a useful visual indication of mechanical gate position. It does not prove seat leakage performance, so shut-off acceptance should be verified separately where required.<\/p>\n<\/div>\n<\/details><details>\n<summary>How do you know whether a non-rising stem gate valve is open?<\/summary>\n<div class=\"rv-faq-answer\">\n<p>The valve may use a gearbox indicator, mechanical indicator, limit switches, actuator feedback or a position transmitter. The required method should be specified in the RFQ and confirmed in the operator or actuator scope.<\/p>\n<\/div>\n<\/details><details>\n<summary>Is a non-rising stem gate valve always better for buried service?<\/summary>\n<div class=\"rv-faq-answer\">\n<p>No. Compact operating height can be useful, but direct-burial suitability also depends on the complete valve construction, coating, sealing, groundwater exposure, extension arrangement, operator access and project specification.<\/p>\n<\/div>\n<\/details><details>\n<summary>Does a rising stem gate valve need more installation space?<\/summary>\n<div class=\"rv-faq-answer\">\n<p>It normally needs more vertical operating clearance because the stem projects outward during opening. The exact fully open height and maintenance-removal clearance should be verified from the approved supplier drawing.<\/p>\n<\/div>\n<\/details><details>\n<summary>Does rising stem or non-rising stem determine the valve pressure rating?<\/summary>\n<div class=\"rv-faq-answer\">\n<p>No. Stem arrangement alone does not determine pressure-temperature capability. The complete valve design, materials, rating basis and project requirements must be reviewed.<\/p>\n<\/div>\n<\/details><details>\n<summary>Which gate valve is easier to maintain?<\/summary>\n<div class=\"rv-faq-answer\">\n<p>Neither design is universally easier. Rising-stem arrangements often make more operating components externally inspectable, while NRS arrangements reduce exposed stem travel. Maintenance difficulty depends on the construction, service environment and installation access.<\/p>\n<\/div>\n<\/details><details>\n<summary>Can rising stem and non-rising stem gate valves both be actuated?<\/summary>\n<div class=\"rv-faq-answer\">\n<p>Yes. Both can be actuated, but actuator selection should be based on exact valve torque or thrust data, differential pressure, operating time, supply condition and fail-action requirement rather than stem type alone.<\/p>\n<\/div>\n<\/details><\/div>\n<p>Buyers evaluating supplier capability can also review <a href=\"https:\/\/raymonvalve.com\/about-us\/\">Raymon Valve company information<\/a> before submitting project requirements.<\/p>\n<\/div>\n<\/article>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\":\"https:\/\/schema.org\",\n  \"@type\":\"TechArticle\",\n  \"mainEntityOfPage\":{\n    \"@type\":\"WebPage\",\n    \"@id\":\"https:\/\/raymonvalve.com\/rising-stem-vs-non-rising-stem-gate-valve\/\"\n  },\n  \"headline\":\"Rising Stem vs Non-Rising Stem Gate Valve: Position Indication, Installation Space, Buried Service and Maintenance\",\n  \"description\":\"Compare rising stem and non-rising stem gate valves by position indication, installation clearance, buried service, stem-thread exposure and maintenance access.\",\n  \"image\":[\n    \"https:\/\/raymonvalve.com\/wp-content\/uploads\/2026\/09\/rising-stem-vs-non-rising-stem-gate-valve-comparison.webp\"\n  ],\n  \"author\":{\n    \"@type\":\"Organization\",\n    \"name\":\"Raymon Valve\"\n  },\n  \"publisher\":{\n    \"@type\":\"Organization\",\n    \"name\":\"Raymon Valve\",\n    \"url\":\"https:\/\/raymonvalve.com\/\"\n  }\n}\n<\/script> <script type=\"application\/ld+json\">\n{\n  \"@context\":\"https:\/\/schema.org\",\n  \"@type\":\"FAQPage\",\n  \"mainEntity\":[\n    {\n      \"@type\":\"Question\",\n      \"name\":\"What is the main difference between a rising stem and non-rising stem gate valve?\",\n      \"acceptedAnswer\":{\n        \"@type\":\"Answer\",\n        \"text\":\"In a rising-stem gate valve, the external stem normally moves axially with gate travel. In a non-rising-stem valve, the external stem height remains substantially fixed while the gate moves internally. The difference affects position indication, installation envelope and maintenance access.\"\n      }\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"How can you tell if a rising stem gate valve is open or closed?\",\n      \"acceptedAnswer\":{\n        \"@type\":\"Answer\",\n        \"text\":\"Stem travel normally provides a useful visual indication of mechanical gate position. It does not prove seat leakage performance, so shut-off acceptance should be verified separately where required.\"\n      }\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"How do you know whether a non-rising stem gate valve is open?\",\n      \"acceptedAnswer\":{\n        \"@type\":\"Answer\",\n        \"text\":\"The valve may use a gearbox indicator, mechanical indicator, limit switches, actuator feedback or a position transmitter. The required method should be specified in the RFQ and confirmed in the operator or actuator scope.\"\n      }\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Is a non-rising stem gate valve always better for buried service?\",\n      \"acceptedAnswer\":{\n        \"@type\":\"Answer\",\n        \"text\":\"No. Compact operating height can be useful, but direct-burial suitability also depends on the complete valve construction, coating, sealing, groundwater exposure, extension arrangement, operator access and project specification.\"\n      }\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Does a rising stem gate valve need more installation space?\",\n      \"acceptedAnswer\":{\n        \"@type\":\"Answer\",\n        \"text\":\"It normally needs more vertical operating clearance because the stem projects outward during opening. The exact fully open height and maintenance-removal clearance should be verified from the approved supplier drawing.\"\n      }\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Does rising stem or non-rising stem determine the valve pressure rating?\",\n      \"acceptedAnswer\":{\n        \"@type\":\"Answer\",\n        \"text\":\"No. Stem arrangement alone does not determine pressure-temperature capability. The complete valve design, materials, rating basis and project requirements must be reviewed.\"\n      }\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Which gate valve is easier to maintain?\",\n      \"acceptedAnswer\":{\n        \"@type\":\"Answer\",\n        \"text\":\"Neither design is universally easier. Rising-stem arrangements often make more operating components externally inspectable, while NRS arrangements reduce exposed stem travel. Maintenance difficulty depends on the construction, service environment and installation access.\"\n      }\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Can rising stem and non-rising stem gate valves both be actuated?\",\n      \"acceptedAnswer\":{\n        \"@type\":\"Answer\",\n        \"text\":\"Yes. Both can be actuated, but actuator selection should be based on exact valve torque or thrust data, differential pressure, operating time, supply condition and fail-action requirement rather than stem type alone.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\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 rising-stem gate valve provides a visible indication of gate travel because the stem moves axially [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"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":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","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":"set","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":""},"categories":[1],"tags":[],"class_list":["post-14479","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/posts\/14479","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/comments?post=14479"}],"version-history":[{"count":8,"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/posts\/14479\/revisions"}],"predecessor-version":[{"id":14487,"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/posts\/14479\/revisions\/14487"}],"wp:attachment":[{"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/media?parent=14479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/categories?post=14479"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/raymonvalve.com\/de\/wp-json\/wp\/v2\/tags?post=14479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}