{"id":7407,"date":"2025-04-09T13:30:52","date_gmt":"2025-04-09T13:30:52","guid":{"rendered":"https:\/\/ntgdvalve.com\/?p=7407"},"modified":"2026-04-23T08:06:37","modified_gmt":"2026-04-23T08:06:37","slug":"understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants","status":"publish","type":"post","link":"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/","title":{"rendered":"V\u00e1lvula de compuerta paralela en centrales el\u00e9ctricas: funcionamiento, ajuste y l\u00edmite de la cu\u00f1a"},"content":{"rendered":"<p><strong>Author Name:<\/strong> Bruce Zheng<\/p>\n<p><strong>Author Role:<\/strong> Co-Founder and Valve Engineer at NTGD Valve<\/p>\n<p><strong>Author Bio:<\/strong> Bruce Zheng is Co-Founder and Valve Engineer at NTGD Valve, focusing on industrial valve selection, application, and technical content for global B2B buyers.<\/p>\n<p><strong>Last Updated:<\/strong> April 22, 2026<\/p>\n<p>A <strong>parallel slide gate valve<\/strong> is not just a generic power plant gate valve with a different label. It is a specific shutoff design used where sealing stability, high temperature, high pressure, and cycling behavior matter more than simple familiarity with gate-valve categories.<\/p>\n<p>In power-plant service, that distinction is practical. Choosing the wrong shutoff route for high-energy steam or feedwater duty can lead to thermal binding, difficult hot operation, unstable shutoff performance, and maintenance exposure that costs far more than the valve line item itself. The real question is not whether a valve sounds robust. It is whether its sealing route fits the duty better than the alternatives.<\/p>\n<p>This article focuses on that question from an engineering perspective:<\/p>\n<ul>\n<li>why a <strong>parallel slide gate valve<\/strong> is considered for demanding power duties,<\/li>\n<li>how its sealing mechanism changes hot-service behavior,<\/li>\n<li>where it fits in steam, feedwater, and turbine-isolation service,<\/li>\n<li>and where the real boundary sits between a <strong>parallel slide gate valve vs wedge gate valve<\/strong> decision.<\/li>\n<\/ul>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0a0a0a;color:#0a0a0a\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0a0a0a;color:#0a0a0a\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#What_a_Parallel_Slide_Gate_Valve_Means_in_Power-Plant_Service\" >What a Parallel Slide Gate Valve Means in Power-Plant Service<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#What_makes_it_a_parallel_slide_gate_valve\" >What makes it a parallel slide gate valve<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Parallel_slide_gate_valve_vs_parallel_gate_valve_terminology\" >Parallel slide gate valve vs parallel gate valve terminology<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Why_this_valve_appears_in_power-plant_service\" >Why this valve appears in power-plant service<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#How_a_Parallel_Slide_Gate_Valve_Seals_and_Operates\" >How a Parallel Slide Gate Valve Seals and Operates<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Twin-disc_and_parallel-faced_closure_logic\" >Twin-disc and parallel-faced closure logic<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Spring_preload_and_line-pressure-assisted_sealing\" >Spring preload and line-pressure-assisted sealing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Why_no_wedging_action_changes_torque_binding_and_shutoff_behavior\" >Why no wedging action changes torque, binding, and shutoff behavior<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Why_This_Valve_Design_Matters_in_High-Energy_Power_Service\" >Why This Valve Design Matters in High-Energy Power Service<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Stable_shutoff_and_lower_mechanical_stress\" >Stable shutoff and lower mechanical stress<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Low_pressure_drop_and_service_suitability\" >Low pressure drop and service suitability<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Why_reduced_wear_can_lower_maintenance_burden\" >Why reduced wear can lower maintenance burden<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Mapping_Power-Plant_Duties_to_Parallel_Slide_Gate_Valve_Fit\" >Mapping Power-Plant Duties to Parallel Slide Gate Valve Fit<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#High-pressure_steam_systems\" >High-pressure steam systems<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Boiler_feedwater_service\" >Boiler feedwater service<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Turbine_isolation_and_shutoff_protection\" >Turbine isolation and shutoff protection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Where_steam_headers_and_similar_high-energy_duties_fit\" >Where steam headers and similar high-energy duties fit<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Parallel_Slide_Gate_Valve_vs_Wedge_Gate_Valve_Where_the_Boundary_Really_Is\" >Parallel Slide Gate Valve vs Wedge Gate Valve: Where the Boundary Really Is<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Sealing_logic_wedging_vs_non-wedging\" >Sealing logic: wedging vs non-wedging<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Thermal_binding_operating_torque_and_shutoff_stability\" >Thermal binding, operating torque, and shutoff stability<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#When_parallel_slide_has_an_advantage%E2%80%94and_when_not_to_overgeneralize\" >When parallel slide has an advantage\u2014and when not to overgeneralize<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Severe-Service_Boundaries_Seat_Route_Hard-Facing_and_Reliability_Under_Stress\" >Severe-Service Boundaries: Seat Route, Hard-Facing, and Reliability Under Stress<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Why_seat_and_seal_route_matter_in_high-temperature_duty\" >Why seat and seal route matter in high-temperature duty<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Metal-to-metal_hard-facing_and_wear_resistance\" >Metal-to-metal, hard-facing, and wear resistance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Differential_pressure_thermal_cycling_and_long-cycle_reliability\" >Differential pressure, thermal cycling, and long-cycle reliability<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Lifecycle_Maintenance_and_Final_Fit_Check\" >Lifecycle, Maintenance, and Final Fit Check<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#What_to_monitor_in_service\" >What to monitor in service<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Maintenance_burden_and_reliability_implications\" >Maintenance burden and reliability implications<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Final_fit_check_before_specifying_this_valve_for_power_duty\" >Final fit check before specifying this valve for power duty<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#FAQ\" >FAQ<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#1_Is_a_parallel_gate_valve_the_same_as_a_parallel_slide_gate_valve\" >1. Is a parallel gate valve the same as a parallel slide gate valve?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#2_How_does_line-pressure-assisted_sealing_help_a_parallel_slide_valve\" >2. How does line-pressure-assisted sealing help a parallel slide valve?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#3_Is_a_parallel_slide_gate_valve_always_better_than_a_wedge_gate_valve\" >3. Is a parallel slide gate valve always better than a wedge gate valve?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#4_Can_a_parallel_slide_gate_valve_be_used_for_throttling\" >4. Can a parallel slide gate valve be used for throttling?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#5_Can_a_parallel_slide_gate_valve_make_sense_in_low-pressure_auxiliary_power-plant_service\" >5. Can a parallel slide gate valve make sense in low-pressure auxiliary power-plant service?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#6_What_should_maintenance_teams_pay_attention_to_first\" >6. What should maintenance teams pay attention to first?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#7_When_should_seat_route_and_hard-facing_receive_extra_attention\" >7. When should seat route and hard-facing receive extra attention?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/ntgdvalve.com\/es\/understanding-the-importance-of-parallel-slide-gate-valves-in-power-plants\/#Final_Application_Check\" >Final Application Check<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_a_Parallel_Slide_Gate_Valve_Means_in_Power-Plant_Service\"><\/span>What a Parallel Slide Gate Valve Means in Power-Plant Service<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A <strong>parallel slide gate valve<\/strong> uses parallel-faced closure members rather than a wedge-shaped gate that relies primarily on wedging force to create shutoff. In many industrial contexts, the term <strong>parallel gate valve<\/strong> is used as a related or overlapping term. On this page, the focus is the parallel slide route used for demanding shutoff duty in power-plant service.<\/p>\n<p>That distinction matters because the phrase <strong>power plant gate valve<\/strong> is broad. It can include wedge gate valves, pressure-seal routes, and other high-energy isolation designs. This page is narrower. It is about the <strong>parallel slide gate valve in power-plant service<\/strong>, especially where steam, feedwater, or turbine-related isolation duty pushes the buyer to look beyond a generic gate-valve label.<\/p>\n<figure id=\"attachment_9240\" aria-describedby=\"caption-attachment-9240\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-9240\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-real-product-photo.png\" alt=\"Real parallel slide gate valve product photo with forged steel block body and handwheel operator\" width=\"600\" height=\"750\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-real-product-photo.png 1122w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-real-product-photo-768x960.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-real-product-photo-10x12.png 10w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-real-product-photo-600x750.png 600w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption id=\"caption-attachment-9240\" class=\"wp-caption-text\">A real finished valve photo adds product credibility without taking over the mechanism discussion.<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"What_makes_it_a_parallel_slide_gate_valve\"><\/span>What makes it a parallel slide gate valve<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The defining feature is the closure arrangement. Instead of forcing a wedge tightly between seats, a parallel slide design uses parallel closure surfaces and a sealing logic that depends on spring assistance, line pressure, or both, depending on the design route.<\/p>\n<p>That difference changes how the valve behaves under load. It affects opening force, shutoff stability, response to thermal growth, and long-term wear behavior.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Parallel_slide_gate_valve_vs_parallel_gate_valve_terminology\"><\/span>Parallel slide gate valve vs parallel gate valve terminology<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In practice, many buyers and engineers use <strong>parallel slide gate valve<\/strong>, <strong>parallel gate valve<\/strong>, and sometimes <strong>parallel slide valve<\/strong> in related ways. The terminology is not always handled consistently across vendors and industries.<\/p>\n<p>For selection work, the important point is not the label alone. It is whether the design actually follows a <a href=\"https:\/\/ntgdvalve.com\/slide-gate-valve\/\">parallel slide shutoff mechanism<\/a> associated with this valve family. For procurement and specification, the safest check is to confirm that the valve uses a parallel-faced, non-wedging closure route with preload and pressure-assisted sealing behavior rather than relying mainly on wedge force.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_this_valve_appears_in_power-plant_service\"><\/span>Why this valve appears in power-plant service<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Power plants place shutoff valves in severe duties. Temperature can be high. Pressure can be high. Cycling may be repeated. Leakage consequences can be operationally serious even when the valve is not serving a control function.<\/p>\n<p>That is why the parallel slide route is evaluated in power service. It is not because it is automatically the best gate valve in every case. It is because certain high-energy isolation duties reward its sealing behavior and operating characteristics. In steam, feedwater, and other hot shutoff points, a non-wedging route is often considered precisely because thermal cycling, operating difficulty, and shutoff instability can become the real problem\u2014not the valve category printed on the datasheet.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_a_Parallel_Slide_Gate_Valve_Seals_and_Operates\"><\/span>How a Parallel Slide Gate Valve Seals and Operates<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Understanding <strong>parallel slide valve operation<\/strong> is the key to understanding why this valve appears in power service at all. The value of the design comes from how it shuts off, not from a generic claim that it is simply \u201cstronger\u201d or \u201cbetter.\u201d<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Twin-disc_and_parallel-faced_closure_logic\"><\/span>Twin-disc and parallel-faced closure logic<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A typical parallel slide gate valve uses parallel-faced closure members that move into the shutoff position without relying on wedging action to generate the main sealing load. That is the core structural difference.<\/p>\n<p>Because the closure members remain parallel rather than wedged, the valve\u2019s shutoff behavior is tied more directly to seat-contact logic and line conditions than to forcing a tapered gate into place.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Spring_preload_and_line-pressure-assisted_sealing\"><\/span>Spring preload and line-pressure-assisted sealing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Many parallel slide designs use spring assistance to maintain disc positioning and promote early contact. That preload matters because it helps establish basic seat contact before full system pressure is available.<\/p>\n<p>As system pressure builds, line pressure then reinforces sealing contact. In other words, preload supports the initial sealing relationship, while service pressure strengthens it under operating conditions. That is an important distinction in startup, low-differential, or changing-pressure phases, where the valve must still behave in a controlled way before full pressure assistance is established.<\/p>\n<p>That is why the design is often associated with stable shutoff in high-energy service. The sealing route is not just mechanical forcing. It is a combination of geometry, preload, and <a href=\"https:\/\/www.emerson.com\/documents\/automation\/data-sheets-dewrance-parallel-slide-gate-valves-sempell-en-en-5193522.pdf\" target=\"_blank\" rel=\"noopener\">service-pressure behavior<\/a>.<\/p>\n<figure id=\"attachment_9246\" aria-describedby=\"caption-attachment-9246\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"size-full wp-image-9246\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-sealing-mechanism-diagram.png\" alt=\"Cross-sectional diagram of a parallel slide gate valve showing spring preload and non-wedging seat contact\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-sealing-mechanism-diagram.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-sealing-mechanism-diagram-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-sealing-mechanism-diagram-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-sealing-mechanism-diagram-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-sealing-mechanism-diagram-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9246\" class=\"wp-caption-text\">This cutaway clarifies the parallel, non-wedging shutoff route that defines the design.<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Why_no_wedging_action_changes_torque_binding_and_shutoff_behavior\"><\/span>Why no wedging action changes torque, binding, and shutoff behavior<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The absence of primary wedging action does <strong>not<\/strong> make a parallel slide valve universally superior to every wedge design. It changes the valve\u2019s operating behavior, and that change matters in the right duty.<\/p>\n<p>First, it can reduce the mechanical tendency toward <strong>thermal binding<\/strong> when hot-service temperature changes affect internal dimensions. Second, it can reduce operating-force demands compared with situations where a wedge must be driven hard into sealing surfaces under load. Third, it can support stable shutoff behavior in duties where sealing reliability matters more than throttling precision.<\/p>\n<p>The point is not that one route wins by definition. The point is that the sealing route is fundamentally different, and that difference changes the selection logic.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_This_Valve_Design_Matters_in_High-Energy_Power_Service\"><\/span>Why This Valve Design Matters in High-Energy Power Service<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The performance value of a parallel slide gate valve comes from its shutoff route. Buyers should judge the design by what that route changes in service, not by generic claims about durability.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Stable_shutoff_and_lower_mechanical_stress\"><\/span>Stable shutoff and lower mechanical stress<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A parallel slide gate valve is primarily a <strong>shutoff<\/strong> valve. In high-energy power service, that matters because leakage risk, thermal distortion, and repeated cycling can turn a familiar isolation point into a maintenance problem.<\/p>\n<p>When the sealing route avoids heavy wedging as the primary mechanism, the valve can reduce some of the mechanical stress associated with opening, closing, and thermal exposure. In practical power duty, that can mean more predictable hot operation and lower exposure to shutoff instability at critical isolation points.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Low_pressure_drop_and_service_suitability\"><\/span>Low pressure drop and service suitability<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Like other full-bore or near-full-bore isolation routes, a parallel slide gate valve is attractive where the valve should disappear from the flow path when open rather than behave like a throttling device.<\/p>\n<p>So \u201cefficiency\u201d here should not be read as precision flow control. It means the valve suits <strong>open-or-closed isolation duty<\/strong> while keeping flow resistance low in the open position. That is valuable in steam and feedwater service because the design is being judged as an <a href=\"https:\/\/www.spiraxsarco.com\/learn-about-steam\/pipeline-ancillaries\/isolation-valves---linear-movement?sc_lang=en-GB\" target=\"_blank\" rel=\"noopener\">isolation route<\/a>, not as a control valve substitute.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_reduced_wear_can_lower_maintenance_burden\"><\/span>Why reduced wear can lower maintenance burden<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Maintenance benefit is a result, not a slogan. If operating force is lower, if shutoff remains stable, and if the seat route is appropriate for the service, wear exposure can become more manageable over time.<\/p>\n<p>For a power plant, that matters because reduced wear is not just a component-life issue. It can lower exposure to unplanned shutoff problems, difficult hot restarts, and maintenance work at lines where isolation reliability matters operationally. Maintenance does not disappear, but the design route can materially change the burden the plant must carry.<\/p>\n<figure id=\"attachment_9242\" aria-describedby=\"caption-attachment-9242\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"size-full wp-image-9242\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-feature-to-outcome-map.png\" alt=\"Feature-to-outcome chart showing how parallel slide gate valve design affects power-service performance\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-feature-to-outcome-map.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-feature-to-outcome-map-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-feature-to-outcome-map-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-feature-to-outcome-map-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-feature-to-outcome-map-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9242\" class=\"wp-caption-text\">The chart links design features to the service outcomes buyers care about in hot-duty isolation.<\/figcaption><\/figure>\n<table>\n<thead>\n<tr>\n<th>Design feature<\/th>\n<th>Why it matters<\/th>\n<th>Service result<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Non-wedging sealing route<\/td>\n<td>Avoids relying mainly on wedge force for shutoff<\/td>\n<td>Better fit for power-service duties sensitive to thermal binding and difficult hot operation<\/td>\n<\/tr>\n<tr>\n<td>Spring- and line-pressure-assisted sealing<\/td>\n<td>Supports seat contact first through preload, then through service pressure<\/td>\n<td>More stable shutoff logic in steam and feedwater isolation duty<\/td>\n<\/tr>\n<tr>\n<td>Low-resistance open flow path<\/td>\n<td>Suits isolation duty rather than throttling duty<\/td>\n<td>Lower pressure-loss penalty when fully open in high-energy lines<\/td>\n<\/tr>\n<tr>\n<td>Lower operating-force tendency<\/td>\n<td>Reduces mechanical loading during operation<\/td>\n<td>Can help limit hot-restart operability problems and maintenance exposure<\/td>\n<\/tr>\n<tr>\n<td>Proper seat route for severe duty<\/td>\n<td>Improves resistance to heat and wear exposure<\/td>\n<td>Better long-cycle shutoff reliability when correctly specified for power-plant service<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Mapping_Power-Plant_Duties_to_Parallel_Slide_Gate_Valve_Fit\"><\/span>Mapping Power-Plant Duties to Parallel Slide Gate Valve Fit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The right way to use the broad phrase <strong>power plant gate valve<\/strong> on this page is to map it back to actual duties. This article is not about all power-plant valves. It is about where the parallel slide route fits.<\/p>\n<figure id=\"attachment_9245\" aria-describedby=\"caption-attachment-9245\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9245\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-power-service-map.png\" alt=\"Service map showing where a parallel slide gate valve fits in steam, feedwater, turbine isolation, and steam headers\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-power-service-map.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-power-service-map-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-power-service-map-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-power-service-map-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-power-service-map-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9245\" class=\"wp-caption-text\">The duty map shows where parallel slide selection becomes practical in power-plant service.<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"High-pressure_steam_systems\"><\/span>High-pressure steam systems<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>High-pressure steam duty is one of the clearest fit scenarios. The valve is evaluated here because shutoff reliability under heat, repeated thermal cycling, and hot operating behavior matter more than general-purpose familiarity.<\/p>\n<p>In this duty, the buyer should look past generic \u201chigh-temperature capable\u201d language. The real questions are whether the valve can maintain shutoff confidence across thermal swings, whether the sealing route reduces sensitivity to thermal binding, and whether hot-service operation remains manageable after repeated cycles.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Boiler_feedwater_service\"><\/span>Boiler feedwater service<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Boiler feedwater isolation is not just another liquid-service line item. Shutoff integrity, differential loading, cycling pattern, and wear behavior can all matter, especially where isolation reliability must remain stable over time.<\/p>\n<p>A parallel slide gate valve may be considered when the service places a premium on dependable shutoff, controlled operating behavior, and long-term seat performance. The key is to evaluate the actual feedwater duty rather than assume that any gate valve route will behave the same way under repeated isolation demand.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Turbine_isolation_and_shutoff_protection\"><\/span>Turbine isolation and shutoff protection<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This is where the wording must stay precise. A parallel slide gate valve should not be presented as a precision control valve. In turbine-related duty, its value is tied to <strong>isolation and shutoff protection<\/strong>, not throttling performance.<\/p>\n<p>That means the selection logic is about leakage consequence, isolation reliability, and dependable shutoff behavior when the system demands it. In turbine-related service, the wrong shutoff route can become a system-protection issue, not just a valve-maintenance issue.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Where_steam_headers_and_similar_high-energy_duties_fit\"><\/span>Where steam headers and similar high-energy duties fit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Steam headers and similar high-energy shutoff points often follow the same logic. If the line sees demanding thermal conditions, repeated cycling, or tight shutoff expectations, the buyer may need to look closely at whether the parallel slide route offers a better behavioral fit than a more conventional wedge-based route.<\/p>\n<p>The point is not to expand this page into every power-plant subsystem. It is to show that steam headers and similar hot isolation points often raise the same engineering questions seen in <a href=\"https:\/\/ntgdvalve.com\/high-pressure-gate-valve-application-and-troubleshooting\/\">high-pressure gate valve applications<\/a>.<\/p>\n<table>\n<thead>\n<tr>\n<th>Power-plant duty<\/th>\n<th>Why the parallel slide route is considered<\/th>\n<th>Main checks before specifying<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>High-pressure steam<\/td>\n<td>Non-wedging shutoff logic can reduce thermal-binding sensitivity in hot cycling service<\/td>\n<td>Thermal cycling severity, seat route, hot-service operability<\/td>\n<\/tr>\n<tr>\n<td>Boiler feedwater isolation<\/td>\n<td>Non-wedging shutoff behavior can help keep repeat isolation duty stable when cycling, loading, and wear rise<\/td>\n<td>Shutoff integrity, cycling burden, wear exposure, operating behavior<\/td>\n<\/tr>\n<tr>\n<td>Turbine isolation<\/td>\n<td>Non-throttling shutoff logic prioritizes isolation confidence where leakage consequence and system protection dominate<\/td>\n<td>Leakage consequence, shutoff confidence, response under duty<\/td>\n<\/tr>\n<tr>\n<td>Steam headers \/ similar high-energy lines<\/td>\n<td>Hot cycling and pressure swings can make sealing behavior, not valve familiarity, the main selection issue<\/td>\n<td>Temperature swings, differential pressure, lifecycle burden, seat design<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Parallel_Slide_Gate_Valve_vs_Wedge_Gate_Valve_Where_the_Boundary_Really_Is\"><\/span>Parallel Slide Gate Valve vs Wedge Gate Valve: Where the Boundary Really Is<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The most useful comparison on this page is not parallel slide gate valve vs every other valve family. It is <strong>parallel slide gate valve vs wedge gate valve<\/strong>.<\/p>\n<figure id=\"attachment_9244\" aria-describedby=\"caption-attachment-9244\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9244\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-vs-wedge-gate-valve-comparison.png\" alt=\"Comparison chart of parallel slide gate valve and wedge gate valve selection in power-plant service\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-vs-wedge-gate-valve-comparison.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-vs-wedge-gate-valve-comparison-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-vs-wedge-gate-valve-comparison-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-vs-wedge-gate-valve-comparison-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-vs-wedge-gate-valve-comparison-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9244\" class=\"wp-caption-text\">This comparison keeps the parallel-slide-versus-wedge decision tied to duty, not slogans.<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Sealing_logic_wedging_vs_non-wedging\"><\/span>Sealing logic: wedging vs non-wedging<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A wedge gate valve creates shutoff through wedging geometry. A parallel slide gate valve relies on a parallel sealing route supported by preload and service-pressure behavior rather than primary wedging force.<\/p>\n<p>That difference is not academic. It changes how the valve responds under thermal load, how much operating force may be needed, and how the sealing surfaces are stressed in service.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Thermal_binding_operating_torque_and_shutoff_stability\"><\/span>Thermal binding, operating torque, and shutoff stability<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This is where the comparison becomes practical. Wedge routes can be highly effective, but the buyer must pay close attention to how heat, expansion, and operating force interact in the actual duty. A parallel slide route is often considered where <a href=\"https:\/\/www.trilliumflow.com\/tf-news\/thermal-binding\/\" target=\"_blank\" rel=\"noopener\">thermal binding<\/a> becomes a problem rather than a detail.<\/p>\n<p>The decision is not \u201cparallel slide is newer\u201d or \u201cwedge is outdated.\u201d The decision is which sealing route is more stable for the duty. A parallel slide valve is attractive because it may reduce exposure to wedging-related hot-operation problems\u2014but that advantage belongs to specific duties, not to every installation with a gate valve in it.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"When_parallel_slide_has_an_advantage%E2%80%94and_when_not_to_overgeneralize\"><\/span>When parallel slide has an advantage\u2014and when not to overgeneralize<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A parallel slide gate valve tends to become attractive when the service has a stronger need for:<\/p>\n<ul>\n<li>stable shutoff in high-energy duty,<\/li>\n<li>lower sensitivity to wedging-related hot-operation issues,<\/li>\n<li>lower operating-force tendency,<\/li>\n<li>and lifecycle behavior that justifies the route.<\/li>\n<\/ul>\n<p>But it should not be sold as a universal replacement for every wedge gate valve. Plant standards, seat route, specification history, duty pattern, and maintenance philosophy still matter. In many plants, wedge routes remain practical for more general isolation duty, less thermally severe service, or lines where the <a href=\"https:\/\/ntgdvalve.com\/difference-between-solid-wedge-gate-valve-and-flexible-wedge-gate-valve\/\">solid-vs-flexible wedge tradeoff<\/a> matters more than optimizing around hot-duty behavior.<\/p>\n<p>A short role boundary is also useful here: if the real duty is continuous throttling, the comparison may no longer be parallel slide vs wedge. It may be gate valve vs a control-oriented route entirely.<\/p>\n<table>\n<thead>\n<tr>\n<th>Decision factor<\/th>\n<th>Parallel slide gate valve<\/th>\n<th>Wedge gate valve<\/th>\n<th>Why it changes selection<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Primary sealing route<\/td>\n<td>Parallel, non-wedging seat logic<\/td>\n<td>Wedging seat logic<\/td>\n<td>Changes shutoff behavior under load<\/td>\n<\/tr>\n<tr>\n<td>Response to thermal growth<\/td>\n<td>Often chosen to reduce wedging-related binding concerns<\/td>\n<td>Requires closer attention to wedging behavior under heat<\/td>\n<td>Important in high-temperature duty<\/td>\n<\/tr>\n<tr>\n<td>Operating-force tendency<\/td>\n<td>Often lower when correctly applied<\/td>\n<td>Can increase with wedging load and service condition<\/td>\n<td>Affects operability and actuator demand<\/td>\n<\/tr>\n<tr>\n<td>Best-fit logic<\/td>\n<td>High-energy shutoff where sealing behavior and hot operation are the priority<\/td>\n<td>General isolation duty, less thermally severe service, or lines where plant standards favor wedge interchangeability<\/td>\n<td>Keeps the comparison duty-specific rather than absolute<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Severe-Service_Boundaries_Seat_Route_Hard-Facing_and_Reliability_Under_Stress\"><\/span>Severe-Service Boundaries: Seat Route, Hard-Facing, and Reliability Under Stress<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In severe power duty, seat design often influences service life more directly than body style alone. Buyers do not just choose a valve family. They choose a sealing route that must remain credible under heat, pressure, differential loading, cycling, and wear exposure.<\/p>\n<figure id=\"attachment_9243\" aria-describedby=\"caption-attachment-9243\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9243\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-severe-service-boundary.png\" alt=\"Severe-service boundary matrix for parallel slide gate valves in power-plant shutoff duty\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-severe-service-boundary.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-severe-service-boundary-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-severe-service-boundary-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-severe-service-boundary-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-severe-service-boundary-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9243\" class=\"wp-caption-text\">Severe-service judgment depends on confirming temperature, cycling, pressure, wear, and lifecycle burden together.<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Why_seat_and_seal_route_matter_in_high-temperature_duty\"><\/span>Why seat and seal route matter in high-temperature duty<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In high-energy isolation duty, the question is whether the sealing system will remain stable as pressure, temperature, and repeated cycling accumulate. That is why seat and seal design deserve explicit attention. A good severe-duty decision cannot be made from body style alone.<\/p>\n<p>When the service is demanding, seat route becomes part of the selection logic itself. It is no longer a minor detail after the valve type has been chosen.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Metal-to-metal_hard-facing_and_wear_resistance\"><\/span>Metal-to-metal, hard-facing, and wear resistance<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Where shutoff must remain reliable under harsh service, buyers often look at metal-seated routes, <a href=\"https:\/\/www.osti.gov\/biblio\/402022\" target=\"_blank\" rel=\"noopener\">hard-facing options<\/a>, and welded seat constructions rather than treating seat detail as a minor specification line.<\/p>\n<p>The purpose is not to make the valve sound tougher. The purpose is to protect shutoff performance when heat, wear, or repeated cycling would otherwise attack the sealing route. In severe duty, seat detail is a reliability decision.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Differential_pressure_thermal_cycling_and_long-cycle_reliability\"><\/span>Differential pressure, thermal cycling, and long-cycle reliability<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Severe-service judgment is rarely about a single variable. Thermal cycling changes internal relationships over time. Differential pressure affects opening behavior and shutoff demand. Long-cycle service turns small sealing and wear problems into maintenance cost.<\/p>\n<p>Buyers commonly check whether the specification aligns with recognized design, pressure-rating, and testing frameworks such as API 600 or <a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/b16-34-valves-flanged-threaded-welding-end\" target=\"_blank\" rel=\"noopener\">ASME B16.34<\/a>, along with plant-specific requirements and testing expectations. Standards do not replace duty analysis, but they help confirm that the valve route being considered is grounded in recognized engineering practice.<\/p>\n<table>\n<thead>\n<tr>\n<th>Severe-service factor<\/th>\n<th>Why it matters<\/th>\n<th>What to confirm<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>High temperature<\/td>\n<td>Changes thermal growth and seat behavior<\/td>\n<td>Whether shutoff stability remains credible across normal and upset temperature range, and whether seat materials or overlay are suitable for the actual duty<\/td>\n<\/tr>\n<tr>\n<td>Thermal cycling<\/td>\n<td>Repeats expansion and contraction stress<\/td>\n<td>Whether repeated cycling increases binding risk, seal degradation, or hot-operation difficulty<\/td>\n<\/tr>\n<tr>\n<td>Differential pressure<\/td>\n<td>Changes loading during operation and shutoff<\/td>\n<td>How the valve will open under expected differential pressure, what shutoff load it must hold, and whether the sealing route matches that demand<\/td>\n<\/tr>\n<tr>\n<td>Wear exposure<\/td>\n<td>Damages sealing surfaces over time<\/td>\n<td>Whether hard-facing, welded seats, or a more robust seat route are justified by the service<\/td>\n<\/tr>\n<tr>\n<td>Long-cycle duty<\/td>\n<td>Turns small wear issues into lifecycle cost<\/td>\n<td>How the plant will verify torque trend, leakage trend, outage inspection results, and whether the seat route will remain credible over time<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Lifecycle_Maintenance_and_Final_Fit_Check\"><\/span>Lifecycle, Maintenance, and Final Fit Check<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A parallel slide gate valve should not end its evaluation at \u201cit fits the duty.\u201d It also has to fit the plant\u2019s maintenance reality.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_to_monitor_in_service\"><\/span>What to monitor in service<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The monitoring focus should be tied to the design route, not a generic <a href=\"https:\/\/ntgdvalve.com\/how-to-maintain-and-troubleshoot-gate-valves-for-optimal-performance\/\">gate valve maintenance checklist<\/a>. In practice, that means:<\/p>\n<ul>\n<li>tracking any increase in seat leakage over time,<\/li>\n<li>monitoring for gradual or sudden changes in breakaway or operating torque,<\/li>\n<li>checking sealing-surface condition during outages,<\/li>\n<li>comparing cycling severity against wear trend,<\/li>\n<li>and watching for any loss of shutoff confidence under actual hot-service conditions.<\/li>\n<\/ul>\n<p>Those signals matter more than a generic instruction to lubricate parts or inspect regularly.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Maintenance_burden_and_reliability_implications\"><\/span>Maintenance burden and reliability implications<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Lifecycle cost usually comes from instability, not from a single dramatic failure. A valve that becomes harder to operate, leaks more often, or needs repeated attention at critical shutoff points can create far more operating burden than the initial specification suggested.<\/p>\n<p>That is why maintenance discussion belongs in the selection logic. It is not a separate housekeeping topic. The buyer is not just choosing whether the valve can work; the buyer is choosing what kind of maintenance burden the shutoff route is likely to create over time.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Final_fit_check_before_specifying_this_valve_for_power_duty\"><\/span>Final fit check before specifying this valve for power duty<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Before specifying a parallel slide gate valve for power service, the buyer should follow a disciplined <a href=\"https:\/\/ntgdvalve.com\/how-to-choose-the-right-gate-valve-for-your-industrial-application\/\">gate valve selection process<\/a>.<\/p>\n<table>\n<thead>\n<tr>\n<th>Final fit-check item<\/th>\n<th>Why it matters<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Is the duty primarily shutoff, not throttling?<\/td>\n<td>Prevents role mismatch that can accelerate wear and weaken isolation performance<\/td>\n<\/tr>\n<tr>\n<td>What are the normal and upset temperature conditions?<\/td>\n<td>Affects seat route, thermal behavior, and hot-service shutoff stability<\/td>\n<\/tr>\n<tr>\n<td>What differential pressure will the valve see during operation?<\/td>\n<td>Changes opening demand, shutoff loading, and operability under duty<\/td>\n<\/tr>\n<tr>\n<td>How severe is the cycling pattern?<\/td>\n<td>Influences wear rate, hot restart behavior, and lifecycle burden<\/td>\n<\/tr>\n<tr>\n<td>What seat route is appropriate for the duty?<\/td>\n<td>Determines whether the sealing system is credible for severe-service reliability<\/td>\n<\/tr>\n<tr>\n<td>What leakage consequence does the plant consider acceptable?<\/td>\n<td>Clarifies how demanding the shutoff expectation really is<\/td>\n<\/tr>\n<tr>\n<td>What maintenance access and monitoring discipline are realistic?<\/td>\n<td>Connects valve selection to how the plant will actually live with the valve<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure id=\"attachment_9241\" aria-describedby=\"caption-attachment-9241\" style=\"width: 1672px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9241\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-lifecycle-fit-checkpoints.png\" alt=\"Lifecycle and fit-check checklist for parallel slide gate valve monitoring and specification\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-lifecycle-fit-checkpoints.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-lifecycle-fit-checkpoints-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-lifecycle-fit-checkpoints-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-lifecycle-fit-checkpoints-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2025\/04\/parallel-slide-gate-valve-lifecycle-fit-checkpoints-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9241\" class=\"wp-caption-text\">These checkpoints connect in-service monitoring with final pre-specification fit review.<\/figcaption><\/figure>\n<p>If those answers support a non-wedging shutoff route under demanding power duty, the parallel slide option becomes easier to justify. If they do not, the page should not force the reader toward it anyway. Its purpose is to avoid role mismatch, not to justify a parallel slide valve everywhere.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Is_a_parallel_gate_valve_the_same_as_a_parallel_slide_gate_valve\"><\/span>1. Is a parallel gate valve the same as a parallel slide gate valve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>They are often used as closely related terms, and many industrial sources use them with substantial overlap. For selection work, the important issue is the actual sealing route and closure design, not the label alone. This page focuses on the parallel slide, non-wedging shutoff route used in demanding power service. For procurement and specification, always verify the actual sealing design rather than assuming the terminology means the same thing across suppliers.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_How_does_line-pressure-assisted_sealing_help_a_parallel_slide_valve\"><\/span>2. How does line-pressure-assisted sealing help a parallel slide valve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It helps reinforce seat contact as service pressure acts on the internal sealing system. That matters because shutoff behavior is not created only by forcing a wedge into place. In lower-pressure or startup conditions, spring preload helps create the initial sealing relationship before full pressure assistance is available. Line pressure then strengthens that contact as operating conditions build, so pressure assistance should be understood as a sealing enhancer, not the only source of shutoff behavior.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Is_a_parallel_slide_gate_valve_always_better_than_a_wedge_gate_valve\"><\/span>3. Is a parallel slide gate valve always better than a wedge gate valve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. The better choice depends on duty. A parallel slide route may offer advantages where thermal behavior, operating-force tendency, and shutoff stability are major concerns. But wedge gate valves remain valid and widely used. The correct comparison is duty-specific, not absolute.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Can_a_parallel_slide_gate_valve_be_used_for_throttling\"><\/span>4. Can a parallel slide gate valve be used for throttling?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It should not be treated as a control-oriented throttling valve just because the flow path looks favorable when open. Its main value in this context is shutoff and isolation performance. If throttling is the real duty, the buyer may need a different valve route altogether.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Can_a_parallel_slide_gate_valve_make_sense_in_low-pressure_auxiliary_power-plant_service\"><\/span>5. Can a parallel slide gate valve make sense in low-pressure auxiliary power-plant service?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It can, but that does not mean it is automatically the most practical choice. The core advantages of the parallel slide route become most meaningful in high-energy, high-temperature, or cycling-sensitive isolation duty. In lower-pressure auxiliary systems, a wedge gate valve may remain the more practical and economical route if the service does not justify the additional focus on non-wedging shutoff behavior.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_What_should_maintenance_teams_pay_attention_to_first\"><\/span>6. What should maintenance teams pay attention to first?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Start with <strong>breakaway or operating-torque trend<\/strong>. A steady increase in torque is often one of the earliest signs that hot-service behavior, wear, deposit buildup, or shutoff stability is beginning to change. After that, watch leakage trend, cycling severity, and sealing-surface condition. Those signals reveal lifecycle behavior far earlier than a generic maintenance checklist.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7_When_should_seat_route_and_hard-facing_receive_extra_attention\"><\/span>7. When should seat route and hard-facing receive extra attention?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Give them extra attention whenever the valve will see high temperature, repeated thermal cycling, differential pressure, or wear-sensitive service. Under those conditions, seat route stops being a secondary specification detail and becomes part of the shutoff-reliability decision.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A <strong>parallel slide gate valve<\/strong> earns its place in power-plant service when the duty calls for dependable shutoff under demanding conditions and the sealing route matters as much as the valve category. The design should be understood as a non-wedging isolation route, not as a generic better gate valve and not as a control-valve substitute.<\/p>\n<p>The most useful way to judge it is to work from the duty outward: define the shutoff role, examine the sealing mechanism, map the actual steam or feedwater service, compare it honestly against wedge behavior, and then confirm whether the seat route and lifecycle burden support the choice. In practice, this valve is most justified in high-pressure, high-temperature, or frequently cycled isolation duties where shutoff stability and hot-service behavior are top priorities. For more general isolation service, less thermally severe duty, or lines where existing plant standards favor wedge interchangeability, a wedge gate valve may still remain the more practical route.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Final_Application_Check\"><\/span>Final Application Check<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If you are reviewing a high-pressure steam, boiler feedwater, or turbine-isolation duty and need to confirm the sealing route, cycling fit, or boundary between parallel slide and wedge gate valves, NTGD Valve can support a duty-specific fit check and specification review before you finalize the valve direction.<\/p>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is a parallel gate valve the same as a parallel slide gate valve?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"They are often used as closely related terms, but the key issue is the actual sealing route and closure design, not the label alone. This page focuses on the parallel slide, non-wedging shutoff route used in demanding power service. For procurement and specification, verify the actual sealing design rather than assuming different suppliers use the terms the same way.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does line-pressure-assisted sealing help a parallel slide valve?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"It reinforces seat contact as service pressure acts on the internal sealing system. In lower-pressure or startup conditions, spring preload helps create the initial sealing relationship before full pressure assistance is available. Line pressure then strengthens that contact as operating conditions build, so pressure assistance is a sealing enhancer, not the only source of shutoff behavior.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is a parallel slide gate valve always better than a wedge gate valve?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. The better choice depends on duty. A parallel slide route may offer advantages where thermal behavior, operating-force tendency, and shutoff stability are major concerns. But wedge gate valves remain valid and widely used. The correct comparison is duty-specific, not absolute.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can a parallel slide gate valve be used for throttling?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"It should not be treated as a control-oriented throttling valve just because the flow path looks favorable when open. Its main value in this context is shutoff and isolation performance. If throttling is the real duty, a different valve route may be more appropriate.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can a parallel slide gate valve make sense in low-pressure auxiliary power-plant service?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"It can, but that does not mean it is automatically the most practical choice. The main advantages of the parallel slide route become most meaningful in high-energy, high-temperature, or cycling-sensitive isolation duty. In lower-pressure auxiliary systems, a wedge gate valve may remain the more practical and economical route if the service does not justify the additional focus on non-wedging shutoff behavior.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What should maintenance teams pay attention to first?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Start with breakaway or operating-torque trend. A steady increase in torque is often one of the earliest signs that hot-service behavior, wear, deposit buildup, or shutoff stability is beginning to change. After that, watch leakage trend, cycling severity, and sealing-surface condition.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"When should seat route and hard-facing receive extra attention?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Give them extra attention whenever the valve will see high temperature, repeated thermal cycling, differential pressure, or wear-sensitive service. Under those conditions, seat route stops being a secondary specification detail and becomes part of the shutoff-reliability decision.\"\n      }\n    }\n  ]\n}\n  <\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Esta gu\u00eda t\u00e9cnica explica c\u00f3mo funciona una v\u00e1lvula de compuerta paralela en centrales el\u00e9ctricas, cu\u00e1les son sus aplicaciones en sistemas de vapor, agua de alimentaci\u00f3n y aislamiento de turbinas, y en qu\u00e9 casos las v\u00e1lvulas de cu\u00f1a pueden seguir siendo la opci\u00f3n m\u00e1s pr\u00e1ctica. Se centra en el comportamiento de sellado, el dise\u00f1o para condiciones de servicio extremo y las revisiones durante el ciclo de vida, en lugar de ofrecer descripciones gen\u00e9ricas de las v\u00e1lvulas.<\/p>","protected":false},"author":1,"featured_media":9240,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","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":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","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":[45],"tags":[],"class_list":["post-7407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/posts\/7407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/comments?post=7407"}],"version-history":[{"count":2,"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/posts\/7407\/revisions"}],"predecessor-version":[{"id":9247,"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/posts\/7407\/revisions\/9247"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/media\/9240"}],"wp:attachment":[{"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/media?parent=7407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/categories?post=7407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ntgdvalve.com\/es\/wp-json\/wp\/v2\/tags?post=7407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}