{"id":9966,"date":"2026-06-01T05:40:05","date_gmt":"2026-06-01T05:40:05","guid":{"rendered":"https:\/\/ntgdvalve.com\/?p=9966"},"modified":"2026-06-01T06:56:23","modified_gmt":"2026-06-01T06:56:23","slug":"how-does-a-ball-valve-work","status":"publish","type":"post","link":"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/","title":{"rendered":"Comment fonctionne un robinet \u00e0 boisseau sph\u00e9rique ?"},"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> May 31, 2026<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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\/fr\/how-does-a-ball-valve-work\/#Quick_Answer_How_Does_a_Ball_Valve_Work\" >Quick Answer: How Does a Ball Valve Work?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#What_Is_a_Ball_Valve\" >What Is a Ball Valve?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#What_This_Article_Covers\" >What This Article Covers<\/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\/fr\/how-does-a-ball-valve-work\/#What_This_Article_Does_Not_Cover\" >What This Article Does Not Cover<\/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\/fr\/how-does-a-ball-valve-work\/#Core_Components_That_Make_a_Ball_Valve_Work\" >Core Components That Make a Ball Valve Work<\/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\/fr\/how-does-a-ball-valve-work\/#Ball_and_Bore\" >Ball and Bore<\/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\/fr\/how-does-a-ball-valve-work\/#Stem_Handle_or_Actuator\" >Stem, Handle, or Actuator<\/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\/fr\/how-does-a-ball-valve-work\/#Seats_Body_and_Sealing_Surfaces\" >Seats, Body, and Sealing Surfaces<\/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\/fr\/how-does-a-ball-valve-work\/#Ball_Valve_Working_Principle_Quarter-Turn_Bore_Alignment\" >Ball Valve Working Principle: Quarter-Turn Bore Alignment<\/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\/fr\/how-does-a-ball-valve-work\/#Step_1_The_Handle_or_Actuator_Turns_the_Stem\" >Step 1: The Handle or Actuator Turns the Stem<\/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\/fr\/how-does-a-ball-valve-work\/#Step_2_The_Ball_Rotates_90_Degrees\" >Step 2: The Ball Rotates 90 Degrees<\/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\/fr\/how-does-a-ball-valve-work\/#Step_3_The_Bore_Aligns_With_or_Blocks_the_Flow_Path\" >Step 3: The Bore Aligns With or Blocks the Flow Path<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#Step_4_The_Seats_Create_Shutoff\" >Step 4: The Seats Create Shutoff<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#Ball_Valve_Open_and_Closed_Position\" >Ball Valve Open and Closed Position<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#Handle_Parallel_to_the_Pipe_Open_Position\" >Handle Parallel to the Pipe: Open Position<\/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\/fr\/how-does-a-ball-valve-work\/#Handle_Perpendicular_to_the_Pipe_Closed_Position\" >Handle Perpendicular to the Pipe: Closed Position<\/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\/fr\/how-does-a-ball-valve-work\/#Why_Handle_Position_Reflects_the_Internal_Bore_Position\" >Why Handle Position Reflects the Internal Bore Position<\/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\/fr\/how-does-a-ball-valve-work\/#How_Seat_Sealing_Creates_Tight_Shutoff\" >How Seat Sealing Creates Tight Shutoff<\/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\/fr\/how-does-a-ball-valve-work\/#What_Happens_Between_the_Ball_and_Seats\" >What Happens Between the Ball and Seats<\/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\/fr\/how-does-a-ball-valve-work\/#Why_Seat_Condition_Matters_for_Shutoff\" >Why Seat Condition Matters for Shutoff<\/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\/fr\/how-does-a-ball-valve-work\/#When_Debris_Abrasive_Media_or_Wear_Can_Affect_Sealing\" >When Debris, Abrasive Media, or Wear Can Affect Sealing<\/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\/fr\/how-does-a-ball-valve-work\/#Flow_Path_Bore_Type_and_Operation_Limits\" >Flow Path, Bore Type, and Operation Limits<\/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\/fr\/how-does-a-ball-valve-work\/#Full_Port_vs_Reduced_Port_in_the_Flow_Path\" >Full Port vs Reduced Port in the Flow Path<\/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\/fr\/how-does-a-ball-valve-work\/#Why_Ordinary_Ball_Valves_Are_Mainly_OnOff_Valves\" >Why Ordinary Ball Valves Are Mainly On\/Off Valves<\/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\/fr\/how-does-a-ball-valve-work\/#Manual_Operation_vs_Actuated_Operation\" >Manual Operation vs Actuated Operation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#Flow_Direction_A_Light_Note_Not_the_Main_Topic\" >Flow Direction: A Light Note, Not the Main Topic<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#What_to_Check_Before_Selecting_a_Ball_Valve_for_Industrial_Service\" >What to Check Before Selecting a Ball Valve for Industrial Service<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#Media_Pressure_and_Temperature\" >Media, Pressure, and Temperature<\/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\/fr\/how-does-a-ball-valve-work\/#Seat_Material_Bore_Type_and_Shutoff_Requirement\" >Seat Material, Bore Type, and Shutoff Requirement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#Manual_or_Actuated_Operation_Requirement\" >Manual or Actuated Operation Requirement<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#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-32\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#How_do_ball_valves_work\" >How do ball valves work?<\/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\/fr\/how-does-a-ball-valve-work\/#How_can_you_tell_if_a_manual_ball_valve_is_open_or_closed\" >How can you tell if a manual ball valve is open or closed?<\/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\/fr\/how-does-a-ball-valve-work\/#Which_way_is_open_on_a_ball_valve\" >Which way is open on a ball valve?<\/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\/fr\/how-does-a-ball-valve-work\/#Can_a_standard_ball_valve_be_used_partially_open_for_throttling\" >Can a standard ball valve be used partially open for throttling?<\/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\/fr\/how-does-a-ball-valve-work\/#Do_ball_valves_have_a_flow_direction\" >Do ball valves have a flow direction?<\/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\/fr\/how-does-a-ball-valve-work\/#What_parts_make_a_ball_valve_work\" >What parts make a ball valve work?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#Is_a_ball_valve_the_same_as_a_ball_check_valve\" >Is a ball valve the same as a ball check valve?<\/a><\/li><\/ul><\/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\/fr\/how-does-a-ball-valve-work\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/ntgdvalve.com\/fr\/how-does-a-ball-valve-work\/#Application_Specification_Support\" >Application \/ Specification Support<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Quick_Answer_How_Does_a_Ball_Valve_Work\"><\/span>Quick Answer: How Does a Ball Valve Work?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>How does a ball valve work?<\/strong> A ball valve works by rotating a bored ball inside the valve body. This is the basic ball valve working principle: when the bore through the ball is aligned with the pipeline, fluid can pass through the valve; when the ball rotates 90 degrees, the solid side of the ball blocks the flow path, and the seats around the ball help create shutoff.<\/p>\n<p>This quarter-turn operation is simple, fast, and effective for isolation service. In industrial pipelines, however, shutoff reliability depends not only on the ball position, but also on bore alignment, seat condition, pressure, temperature, media, and whether the valve is used within its intended service range.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_a_Ball_Valve\"><\/span>What Is a Ball Valve?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A ball valve is a rotary shutoff valve that uses a spherical ball with a hole through its center. This hole is usually called the <strong>bore<\/strong> or <strong>port<\/strong>. The ball sits inside the valve body and rotates between seats that support and seal around it.<\/p>\n<p>In industrial piping systems, ball valves are commonly selected for fast opening and closing, a direct flow path when fully open, and reliable shutoff when the valve is correctly specified for the service. They are widely used for isolation in liquid, gas, chemical, utility, and process pipelines.<\/p>\n<figure id=\"attachment_9980\" aria-describedby=\"caption-attachment-9980\" style=\"width: 1693px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-9980\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-12-inch-600LB-WCB-workshop-product-photo.png\" alt=\"A real NTGD workshop photo showing a technician measuring or checking flanged industrial ball valves. This image supports manufacturing credibility and helps connect the article\u2019s working-principle explanation to real ball valve production and inspection.\" width=\"1693\" height=\"944\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-12-inch-600LB-WCB-workshop-product-photo.png 1693w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-12-inch-600LB-WCB-workshop-product-photo-768x428.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-12-inch-600LB-WCB-workshop-product-photo-1536x856.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-12-inch-600LB-WCB-workshop-product-photo-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-12-inch-600LB-WCB-workshop-product-photo-600x335.png 600w\" sizes=\"(max-width: 1693px) 100vw, 1693px\" \/><figcaption id=\"caption-attachment-9980\" class=\"wp-caption-text\">12 inch 600LB WCB flanged ball valve shown in NTGD workshop.<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"What_This_Article_Covers\"><\/span>What This Article Covers<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This article explains the general working principle of a two-way industrial ball valve:<\/p>\n<ul>\n<li>how the handle, gear operator, or actuator turns the stem;<\/li>\n<li>how the stem rotates the ball;<\/li>\n<li>how bore alignment controls flow;<\/li>\n<li>how open and closed positions can usually be identified;<\/li>\n<li>how the seats help create shutoff;<\/li>\n<li>why ordinary ball valves are mainly used for on\/off service.<\/li>\n<\/ul>\n<p>The focus is the mechanism, not a full product catalog.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_This_Article_Does_Not_Cover\"><\/span>What This Article Does Not Cover<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This article focuses on the general <strong>ball valve working principle<\/strong>. It does not replace a detailed ball valve types guide, parts guide, actuator guide, 3-way ball valve guide, flow direction guide, or maintenance troubleshooting article.<\/p>\n<p>Those topics are still important, but they belong to separate selection or product-specific discussions. For example, 3-way, floating, trunnion-mounted, V-port, and actuated ball valves all share the same basic rotary principle, but their detailed designs affect multiport routing, high-pressure sealing, control service, or automation requirements in different ways.<\/p>\n<p>For readers who need to compare designs rather than the basic mechanism, use the <a href=\"https:\/\/ntgdvalve.com\/ball-valves-types-and-selection-guide\/\">ball valve types and selection guide<\/a> as a separate selection reference.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Core_Components_That_Make_a_Ball_Valve_Work\"><\/span>Core Components That Make a Ball Valve Work<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A ball valve does not work because of the ball alone. The ball, bore, stem, handle or actuator, seats, seals, and body all interact to control flow and shutoff.<\/p>\n<table>\n<thead>\n<tr>\n<th>Component<\/th>\n<th>Role in Ball Valve Operation<\/th>\n<th>Service Relevance<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Valve body<\/td>\n<td>Holds the pressure boundary and houses the ball and seats<\/td>\n<td>Must match pressure, temperature, material, and end connection requirements<\/td>\n<\/tr>\n<tr>\n<td>Ball<\/td>\n<td>Rotates inside the valve body to open or block the flow path<\/td>\n<td>Surface finish, coating, and material affect torque, sealing, and wear behavior<\/td>\n<\/tr>\n<tr>\n<td>Bore \/ port<\/td>\n<td>The hole through the ball that allows flow when aligned with the pipe<\/td>\n<td>Bore size affects flow capacity, pressure drop tendency, and full-bore clearance<\/td>\n<\/tr>\n<tr>\n<td>Stem<\/td>\n<td>Transfers torque from the handle, gear, or actuator to the ball<\/td>\n<td>Stem design affects operating torque and external sealing requirements<\/td>\n<\/tr>\n<tr>\n<td>Handle \/ gear \/ actuator<\/td>\n<td>Provides the motion source that turns the stem<\/td>\n<td>Determines whether the valve is manual, geared, or automated<\/td>\n<\/tr>\n<tr>\n<td>Seats<\/td>\n<td>Support the ball and form the sealing contact surface<\/td>\n<td>Soft or metal seat selection depends on media, temperature, pressure, and shutoff demand<\/td>\n<\/tr>\n<tr>\n<td>Stem packing \/ seals<\/td>\n<td>Help prevent leakage around the stem area<\/td>\n<td>Packing and seal design affect external leakage control and emission performance<\/td>\n<\/tr>\n<tr>\n<td>End connections<\/td>\n<td>Connect the valve to the pipeline<\/td>\n<td>Must suit piping design, installation method, and pressure class<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure id=\"attachment_9988\" aria-describedby=\"caption-attachment-9988\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"size-full wp-image-9988\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-cutaway-core-components-bore-stem-seats.png\" alt=\"Ball valve cutaway showing body ball bore stem handle seats stem seal and flow path\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-cutaway-core-components-bore-stem-seats.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-cutaway-core-components-bore-stem-seats-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-cutaway-core-components-bore-stem-seats-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-cutaway-core-components-bore-stem-seats-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-cutaway-core-components-bore-stem-seats-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9988\" class=\"wp-caption-text\">Core components that make a ball valve work: body, ball, bore, stem, handle, seats, stem seal, and flow path.<\/figcaption><\/figure>\n<div class=\"ntgd-video-embed\" style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; margin: 24px 0;\"><iframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;\" title=\"How a 600LB Ball Valve Comes Together | Precision Assembly Process\" src=\"https:\/\/www.youtube.com\/embed\/sOXbbmyIVIg\" allowfullscreen=\"allowfullscreen\"><br \/>\n<\/iframe><\/div>\n<p style=\"text-align: center;\"><em>Watch how a 600LB industrial ball valve comes together during the assembly process.<\/em><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ball_and_Bore\"><\/span>Ball and Bore<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The ball is usually machined with a straight bore through its center. When the bore is aligned with the pipeline, the valve is open. When the bore is turned perpendicular to the pipeline, the valve is closed.<\/p>\n<p>This bore alignment is the center of the ball valve function. A ball valve does not lift a disc like a globe valve, and it does not move a wedge up and down like a gate valve. It rotates a bored ball.<\/p>\n<p>Bore size also affects how the valve behaves in service. A full-port design can provide a direct, low-restriction flow path when fully open, while a reduced-port design creates a smaller flow opening and a higher restriction tendency. For systems that require high flow capacity, low pressure drop, or pigging clearance, this difference should be reviewed before selection.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Stem_Handle_or_Actuator\"><\/span>Stem, Handle, or Actuator<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The stem connects the external operating device to the ball. On a manual ball valve, the handle turns the stem directly. On an actuated ball valve, a pneumatic, electric, or hydraulic actuator provides the turning force.<\/p>\n<p>The internal working principle remains the same: the stem rotates the ball. The actuator only changes how the motion is generated and controlled. Detailed actuator sizing, control logic, fail position, and feedback design are separate topics and should not be confused with the general ball valve working principle.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Seats_Body_and_Sealing_Surfaces\"><\/span>Seats, Body, and Sealing Surfaces<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The seats surround the ball and provide the main sealing contact. In many soft-seated ball valves, the seats are pressed against the ball to help prevent internal leakage when the valve is closed. In more demanding services, seat design, seat material, temperature, pressure, and media compatibility become critical.<\/p>\n<p>The body provides the pressure-containing structure. The seats provide the shutoff interface. The ball provides the rotating closure element. All three are needed for a ball valve to work correctly.<\/p>\n<p>For a deeper component-level view, refer to the <a href=\"https:\/\/ntgdvalve.com\/ball-valve-parts\/\">ball valve parts and components guide<\/a> instead of expanding this working-principle article into a full parts guide.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ball_Valve_Working_Principle_Quarter-Turn_Bore_Alignment\"><\/span>Ball Valve Working Principle: Quarter-Turn Bore Alignment<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The ball valve working principle can be understood as a short mechanical sequence: the operating device turns the stem, the stem turns the ball, the ball bore either aligns with or turns away from the flow path, and the seats complete the shutoff.<\/p>\n<figure id=\"attachment_9982\" aria-describedby=\"caption-attachment-9982\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"size-full wp-image-9982\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-working-principle-quarter-turn-bore-alignment.png\" alt=\"Ball valve working principle showing open position 90 degree turn and closed position\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-working-principle-quarter-turn-bore-alignment.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-working-principle-quarter-turn-bore-alignment-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-working-principle-quarter-turn-bore-alignment-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-working-principle-quarter-turn-bore-alignment-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-working-principle-quarter-turn-bore-alignment-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9982\" class=\"wp-caption-text\">A ball valve opens and closes when the bored ball rotates 90 degrees between aligned and perpendicular positions.<\/figcaption><\/figure>\n<table>\n<thead>\n<tr>\n<th>Step<\/th>\n<th>Motion<\/th>\n<th>Internal Result<\/th>\n<th>Flow Result<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>Handle, gear, or actuator turns the stem<\/td>\n<td>Stem transfers torque to the ball<\/td>\n<td>Flow state begins to change<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Stem rotates the ball through a quarter turn<\/td>\n<td>Ball bore moves toward aligned or perpendicular position<\/td>\n<td>Flow path opens or closes<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Bore aligns with or turns away from the pipeline<\/td>\n<td>Open position creates a clear path; closed position blocks the path<\/td>\n<td>Valve opens or closes<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>Seats contact the ball in the closed position<\/td>\n<td>Ball and seats form the sealing boundary<\/td>\n<td>Shutoff depends on valve design and seat condition<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For a neutral technical reference, the <a href=\"https:\/\/engineeringlibrary.org\/reference\/valves-doe-handbook\" target=\"_blank\" rel=\"noopener\">DOE valve handbook<\/a> describes the same basic ball valve motion: the handle turns 90 degrees, the hole through the ball aligns with the inlet and outlet when open, and turns perpendicular to the flow openings when closed.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_1_The_Handle_or_Actuator_Turns_the_Stem\"><\/span>Step 1: The Handle or Actuator Turns the Stem<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ball valve operation starts outside the valve body. A lever handle, gear operator, or actuator applies torque to the stem. The stem then transfers this torque to the ball.<\/p>\n<p>In a manual lever-operated valve, a 90-degree movement of the handle usually corresponds to a 90-degree movement of the ball. In automated service, the actuator performs the same basic rotation but may also include position feedback, limit switches, or control accessories. Those actuator details should be handled under actuated ball valve selection, not in the basic working principle.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_2_The_Ball_Rotates_90_Degrees\"><\/span>Step 2: The Ball Rotates 90 Degrees<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The ball rotates around the stem axis. Because the bore passes through the ball, a quarter-turn movement is enough to move the bore from an open flow path to a blocked flow path.<\/p>\n<p>This is what defines ball valves as quarter-turn valves. The short rotation also explains why they are often used where fast isolation is required.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_3_The_Bore_Aligns_With_or_Blocks_the_Flow_Path\"><\/span>Step 3: The Bore Aligns With or Blocks the Flow Path<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When the valve is open, the bore through the ball lines up with the inlet and outlet. Fluid passes through the ball and continues downstream.<\/p>\n<p>When the valve is closed, the ball turns so that the bore is no longer aligned with the pipeline. The solid side of the ball faces the flow path and blocks the passage.<\/p>\n<p>This is the key difference between a ball valve and many linear-motion valves. A ball valve controls flow by rotating a ported ball, not by raising or lowering a closure member.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_4_The_Seats_Create_Shutoff\"><\/span>Step 4: The Seats Create Shutoff<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Closing the flow path is not only a matter of placing the solid side of the ball in front of the fluid. The seats around the ball also matter. In the closed position, the ball and seats form the sealing interface that limits leakage across the valve.<\/p>\n<p>Ball rotation alone does not guarantee tight shutoff. Seat contact, seat condition, seat material, and the correct seat design are critical to industrial shutoff reliability. If the seats are worn, damaged, chemically attacked, incorrectly selected, or blocked by particles, the valve may leak even when the handle indicates the closed position. This is a common reason a ball valve fails to hold the expected shutoff in real service.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ball_Valve_Open_and_Closed_Position\"><\/span>Ball Valve Open and Closed Position<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The <strong>ball valve open and closed position<\/strong> is usually easy to identify from the handle position on a manual valve. This visual rule is one reason ball valves are widely used for quick isolation.<\/p>\n<table>\n<thead>\n<tr>\n<th>Valve State<\/th>\n<th>Handle Position<\/th>\n<th>Ball Bore Position<\/th>\n<th>Flow Result<\/th>\n<th>Sealing Effect<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Open<\/td>\n<td>Handle is parallel to the pipe<\/td>\n<td>Bore is aligned with the flow path<\/td>\n<td>Fluid passes through<\/td>\n<td>Seats support the ball, but shutoff is not engaged<\/td>\n<\/tr>\n<tr>\n<td>Closed<\/td>\n<td>Handle is perpendicular to the pipe<\/td>\n<td>Bore is turned 90 degrees from the flow path<\/td>\n<td>Flow is blocked<\/td>\n<td>Ball and seats form the shutoff boundary<\/td>\n<\/tr>\n<tr>\n<td>Partially open<\/td>\n<td>Handle is between parallel and perpendicular<\/td>\n<td>Bore is partly exposed to the flow path<\/td>\n<td>Restricted or unstable flow; may cause seat erosion or vibration in ordinary ball valves<\/td>\n<td>Not ideal for precise control in standard on\/off service<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Handle_Parallel_to_the_Pipe_Open_Position\"><\/span>Handle Parallel to the Pipe: Open Position<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When the handle is parallel to the pipeline, a standard manual ball valve is usually open. Internally, the bore through the ball is also aligned with the pipeline. This creates a relatively direct flow path through the valve.<\/p>\n<p>For a full port ball valve, the bore may be close to the pipe bore size, which helps reduce flow restriction. For a reduced port ball valve, the bore is smaller than the pipe bore, so the flow path is more restricted.<\/p>\n<figure id=\"attachment_9985\" aria-describedby=\"caption-attachment-9985\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9985\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-open-closed-position-bore-alignment.png\" alt=\"Ball valve open and closed position showing handle parallel and perpendicular with bore alignment\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-open-closed-position-bore-alignment.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-open-closed-position-bore-alignment-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-open-closed-position-bore-alignment-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-open-closed-position-bore-alignment-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-open-closed-position-bore-alignment-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9985\" class=\"wp-caption-text\">In a standard manual ball valve, handle position usually reflects the internal bore position.<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Handle_Perpendicular_to_the_Pipe_Closed_Position\"><\/span>Handle Perpendicular to the Pipe: Closed Position<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When the handle is perpendicular to the pipeline, the valve is usually closed. Internally, the ball has rotated 90 degrees so that the bore no longer lines up with the flow path. The solid side of the ball blocks flow, and the seats help create shutoff.<\/p>\n<p>This handle rule is useful, but it should still be checked against valve design, locking devices, actuator indicators, and project documentation when the service is critical. In high-pressure, hazardous, or safety-related service, relying only on handle direction can be unsafe; position indicators, actuator feedback, body markings, or system documentation should also be reviewed.<\/p>\n<p>If the project requires clearer valve-status confirmation or remote feedback, review <a href=\"https:\/\/ntgdvalve.com\/ball-valves-with-position-indicators-how-they-improve-operational-accuracy\/\">ball valves with position indicators<\/a> as a separate topic.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_Handle_Position_Reflects_the_Internal_Bore_Position\"><\/span>Why Handle Position Reflects the Internal Bore Position<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The handle is connected to the stem, and the stem is connected to the ball. In a standard manual ball valve, the handle position reflects the position of the bore inside the ball.<\/p>\n<p>That is why a simple handle position can tell the operator whether the valve is likely open or closed. However, in automated valves, valves with gearboxes, locked handles, damaged handles, or special designs, the external indication should be verified with the valve position indicator, actuator feedback, or system documentation.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_Seat_Sealing_Creates_Tight_Shutoff\"><\/span>How Seat Sealing Creates Tight Shutoff<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A ball valve is often described as a valve that opens or closes by rotating a ball. That is true, but it is not complete. Shutoff depends heavily on how the ball and seats contact each other.<\/p>\n<div class=\"ntgd-video-embed\" style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; margin: 24px 0;\"><iframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;\" title=\"High Pressure Test in Action | 18\u201d 600LB Ball Valve Hydro Test\" src=\"https:\/\/www.youtube.com\/embed\/q6tssLa_jEg\" allowfullscreen=\"allowfullscreen\"><br \/>\n<\/iframe><\/div>\n<p style=\"text-align: center;\"><em>See an 18\u201d 600LB ball valve hydro test in an industrial workshop setting.<\/em><\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_Happens_Between_the_Ball_and_Seats\"><\/span>What Happens Between the Ball and Seats<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The ball sits between sealing surfaces called seats. In a typical soft-seated ball valve, the seats are designed to contact the ball surface and form a sealing boundary. When the valve closes, the pressure, seat design, and ball position help maintain contact between the ball and the seat.<\/p>\n<p>In many soft-seated floating ball valves, upstream pressure helps push the ball toward the downstream seat, strengthening the sealing contact. Trunnion-mounted ball valves support the ball differently and often use seat loading mechanisms to maintain sealing contact. These design differences matter for high-pressure, large-size, or demanding services, but they do not change the basic principle: the ball rotates, the flow path is blocked, and the seats create the sealing interface.<\/p>\n<figure id=\"attachment_9984\" aria-describedby=\"caption-attachment-9984\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9984\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-seat-sealing-closed-position-cutaway.png\" alt=\"Ball valve closed position cutaway showing seat sealing interface and blocked flow\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-seat-sealing-closed-position-cutaway.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-seat-sealing-closed-position-cutaway-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-seat-sealing-closed-position-cutaway-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-seat-sealing-closed-position-cutaway-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-seat-sealing-closed-position-cutaway-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9984\" class=\"wp-caption-text\">Ball valve closed position cutaway showing seat sealing interface and blocked flow<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Why_Seat_Condition_Matters_for_Shutoff\"><\/span>Why Seat Condition Matters for Shutoff<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If the ball surface is scratched, the seats are worn, or particles become trapped between the ball and the seat, the valve may leak internally. The handle may show \u201cclosed,\u201d but the sealing surfaces may not be able to create the expected shutoff.<\/p>\n<p>This is especially important in services with abrasive particles, crystallizing fluids, fibrous materials, or media that can attack seat materials. In these cases, the valve should be selected based on actual media, pressure, temperature, seat material, operating frequency, and shutoff requirement.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"When_Debris_Abrasive_Media_or_Wear_Can_Affect_Sealing\"><\/span>When Debris, Abrasive Media, or Wear Can Affect Sealing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Standard soft-seated ball valves perform well in many clean liquid and gas isolation services, but they are not universally suitable for slurry, abrasive, or high-temperature services.<\/p>\n<p>If solids become trapped in the cavity or between the ball and seats, the valve may become harder to operate or may not fully close. If the media is abrasive, the ball surface and seats can wear. If the seat material is not compatible with the temperature or fluid, sealing performance may decline.<\/p>\n<p>These conditions can shorten seat life and reduce shutoff reliability. This does not mean ball valves are unsuitable for industrial service. It means the working principle must be matched with media condition, seat material, operating frequency, and the required shutoff performance.<\/p>\n<p>If the issue is existing internal leakage, hard operation, or seal wear, route the diagnosis to the <a href=\"https:\/\/ntgdvalve.com\/how-to-prevent-leakage-in-ball-valves-common-causes-and-solutions\/\">ball valve leakage prevention guide<\/a> rather than turning this working-principle page into a maintenance article.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Flow_Path_Bore_Type_and_Operation_Limits\"><\/span>Flow Path, Bore Type, and Operation Limits<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The same quarter-turn principle can behave differently depending on bore type, seat design, media, and operation method. These points should be understood as service considerations, not as a full selection guide.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Full_Port_vs_Reduced_Port_in_the_Flow_Path\"><\/span>Full Port vs Reduced Port in the Flow Path<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<thead>\n<tr>\n<th>Bore Type<\/th>\n<th>Flow Opening<\/th>\n<th>Pressure Drop Tendency<\/th>\n<th>Use Note<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Full port<\/td>\n<td>Bore is close to pipeline bore size<\/td>\n<td>Lower restriction tendency<\/td>\n<td>Useful where flow capacity and pigging clearance may matter<\/td>\n<\/tr>\n<tr>\n<td>Reduced port<\/td>\n<td>Bore is smaller than pipeline bore size<\/td>\n<td>Higher restriction tendency than full port<\/td>\n<td>Common where compact size or cost control is acceptable<\/td>\n<\/tr>\n<tr>\n<td>V-port or characterized port<\/td>\n<td>Bore or ball opening is shaped for control<\/td>\n<td>Depends on design<\/td>\n<td>A special ball valve design, not the ordinary on\/off principle<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure id=\"attachment_9983\" aria-describedby=\"caption-attachment-9983\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9983\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-full-port-reduced-port-flow-path.png\" alt=\"Full port and reduced port ball valve flow path comparison\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-full-port-reduced-port-flow-path.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-full-port-reduced-port-flow-path-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-full-port-reduced-port-flow-path-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-full-port-reduced-port-flow-path-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-full-port-reduced-port-flow-path-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9983\" class=\"wp-caption-text\">Full port and reduced port ball valves use the same quarter-turn principle, but the bore size changes the flow opening and restriction tendency.<\/figcaption><\/figure>\n<p>A full port ball valve can provide a more open flow path when fully open. A reduced port ball valve still uses the same quarter-turn principle, but the bore is smaller, so the flow path is more restricted.<\/p>\n<p>This section should not be treated as a complete selection guide. Bore type must be checked together with pressure class, flow requirement, media, end connection, and system design.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_Ordinary_Ball_Valves_Are_Mainly_OnOff_Valves\"><\/span>Why Ordinary Ball Valves Are Mainly On\/Off Valves<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ordinary ball valves are best understood as on\/off valves. They can be placed in a partially open position, but that does not make them ideal for precise throttling.<\/p>\n<p>In a partially open position, flow may pass across the edge of the ball bore and seat area at higher velocity. Frequent throttling with a standard on\/off ball valve can accelerate seat wear, cause vibration or noise, create unstable control, and eventually reduce shutoff reliability. For accurate or frequent flow regulation, a control valve or a purpose-designed V-port ball valve may be more appropriate.<\/p>\n<p>For flow-capacity context, the <a href=\"https:\/\/www.engineeringtoolbox.com\/ball-valves-flow-coefficients-d_223.html\" target=\"_blank\" rel=\"noopener\">Engineering ToolBox ball valve Cv reference<\/a> lists full-bore and reduced-bore ball valve flow coefficients and notes that conventional ball valves are normally not used as throttling valves.<\/p>\n<p>For services that require better modulation than a standard round-port ball valve can provide, review <a href=\"https:\/\/ntgdvalve.com\/what-are-v-port-ball-valves-and-how-do-they-improve-flow-control\/\">V-port ball valves for flow control<\/a> as a separate selection topic.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Manual_Operation_vs_Actuated_Operation\"><\/span>Manual Operation vs Actuated Operation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<figure id=\"attachment_9987\" aria-describedby=\"caption-attachment-9987\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9987\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-manual-pneumatic-electric-operation.png\" alt=\"Manual pneumatic and electric ball valve operation showing the same internal quarter-turn principle\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-manual-pneumatic-electric-operation.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-manual-pneumatic-electric-operation-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-manual-pneumatic-electric-operation-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-manual-pneumatic-electric-operation-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-manual-pneumatic-electric-operation-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9987\" class=\"wp-caption-text\">Manual, pneumatic, and electric operation all rotate the ball valve stem and bored ball through the same quarter-turn principle.<\/figcaption><\/figure>\n<table>\n<thead>\n<tr>\n<th>Operation Method<\/th>\n<th>How the Stem Turns<\/th>\n<th>What Stays the Same<\/th>\n<th>What Not to Assume<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Manual handle<\/td>\n<td>Operator turns the lever<\/td>\n<td>Stem rotates the ball 90 degrees<\/td>\n<td>Handle rule applies only if the handle and stem are correctly aligned<\/td>\n<\/tr>\n<tr>\n<td>Gear operator<\/td>\n<td>Gearbox reduces operating effort<\/td>\n<td>Stem still rotates the ball<\/td>\n<td>Gear position should be checked carefully<\/td>\n<\/tr>\n<tr>\n<td>Pneumatic actuator<\/td>\n<td>Air pressure drives actuator motion<\/td>\n<td>Actuator turns the stem and ball<\/td>\n<td>Actuator sizing, air supply, fail position, and torque requirement need separate review<\/td>\n<\/tr>\n<tr>\n<td>Electric actuator<\/td>\n<td>Motorized actuator turns the stem<\/td>\n<td>Ball still opens or closes by rotation<\/td>\n<td>Torque, duty cycle, control signal, and feedback requirement need separate specification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The basic ball valve operation remains a quarter-turn rotation. The motion source may change, but the internal principle does not.<\/p>\n<p>If the valve must be operated remotely or tied into automation, the next review should move to <a href=\"https:\/\/ntgdvalve.com\/actuated-ball-valve\/\">actuated ball valve specification<\/a> rather than actuator internals in this article.<\/p>\n<p>In basic <strong>ball valve operation<\/strong>, the motion source may be manual or actuated, but the internal result is still the same: the stem rotates the ball through a quarter turn.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Flow_Direction_A_Light_Note_Not_the_Main_Topic\"><\/span>Flow Direction: A Light Note, Not the Main Topic<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Many standard two-way ball valves are commonly used in either direction, but this should not be assumed for every ball valve design. Special seat arrangements, vented balls, special venting, cavity relief features, unidirectional seat designs, or high differential pressure service may require direction checks.<\/p>\n<p>Handle position tells you whether the valve is open or closed. It does not always prove the required flow direction, pressure direction, or installation orientation. For critical service, check the body markings, project specification, datasheet, and manufacturer documentation.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_to_Check_Before_Selecting_a_Ball_Valve_for_Industrial_Service\"><\/span>What to Check Before Selecting a Ball Valve for Industrial Service<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Understanding the ball valve working principle helps connect a simple quarter-turn mechanism to real specification decisions. A ball valve may look simple from the outside, but the correct design depends on service conditions.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Media_Pressure_and_Temperature\"><\/span>Media, Pressure, and Temperature<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Start with the media. Clean water, air, oil, gas, chemical fluids, utility service, slurry, and abrasive service do not place the same demands on the ball and seats.<\/p>\n<p>Pressure and temperature also affect material selection, seat selection, sealing behavior, operating torque, and valve body design. For ball valves, pressure and temperature suitability is often limited not only by body rating, but also by seat and seal materials. Verifying seat compatibility can be as important as checking pressure class.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Seat_Material_Bore_Type_and_Shutoff_Requirement\"><\/span>Seat Material, Bore Type, and Shutoff Requirement<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Seat material should be selected based on media compatibility, temperature range, pressure, and required shutoff performance. A soft seat may provide tight shutoff in many clean services, while more demanding conditions may require a different seat design.<\/p>\n<p>Bore type should also match the system requirement. Full port may be preferred where low restriction or pigging clearance matters. Reduced port may be acceptable where full bore capacity is not required. Special port designs belong to more specific selection discussions.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Manual_or_Actuated_Operation_Requirement\"><\/span>Manual or Actuated Operation Requirement<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A manually operated ball valve may be enough for local isolation. An actuated ball valve may be required for remote operation, automated process control, emergency shutoff, or frequent cycling.<\/p>\n<p>The article\u2019s core principle remains the same: the stem rotates the ball. But the specification of the operating method should consider torque, cycle frequency, control signal, fail position, feedback, environment, and maintenance access.<\/p>\n<figure id=\"attachment_9986\" aria-describedby=\"caption-attachment-9986\" style=\"width: 1672px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9986\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-specification-fit-check-board.png\" alt=\"Ball valve specification fit-check board for media pressure seat bore operation and shutoff requirement\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-specification-fit-check-board.png 1672w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-specification-fit-check-board-768x432.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-specification-fit-check-board-1536x864.png 1536w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-specification-fit-check-board-18x10.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-specification-fit-check-board-600x338.png 600w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><figcaption id=\"caption-attachment-9986\" class=\"wp-caption-text\">Key specification items to confirm before selecting an industrial ball valve.<\/figcaption><\/figure>\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=\"How_do_ball_valves_work\"><\/span>How do ball valves work?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ball valves work by rotating a bored ball 90 degrees inside the valve body. When the bore aligns with the pipe, fluid flows through; when the bore turns perpendicular to the pipe, the solid side of the ball blocks the path and the seats create shutoff. This fast quarter-turn movement makes ball valves useful for isolation service.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_can_you_tell_if_a_manual_ball_valve_is_open_or_closed\"><\/span>How can you tell if a manual ball valve is open or closed?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>On most manual lever-operated ball valves, the valve is open when the handle is parallel to the pipe and closed when the handle is perpendicular to the pipe. Internally, this usually means the ball bore is aligned with the pipe when open and turned 90 degrees when closed.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Which_way_is_open_on_a_ball_valve\"><\/span>Which way is open on a ball valve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>For a standard manual ball valve, the open position is usually when the handle points in the same direction as the pipe. The closed position is usually when the handle is across the pipe. For actuated valves, gear-operated valves, or special designs, confirm the position using the indicator or project documentation.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_a_standard_ball_valve_be_used_partially_open_for_throttling\"><\/span>Can a standard ball valve be used partially open for throttling?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A ball valve can physically be left partially open, but standard on\/off ball valves are not designed for precise or frequent throttling. Partial opening exposes the seat and ball edge to higher-velocity flow, which can cause accelerated wear, vibration, noise, unstable control, and premature shutoff failure. For frequent flow regulation, a V-port ball valve or a dedicated control valve should be reviewed.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do_ball_valves_have_a_flow_direction\"><\/span>Do ball valves have a flow direction?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Many standard two-way ball valves are commonly used as bidirectional shutoff valves, but this is not universal for every design. Direction may matter for valves with special venting, cavity relief features, unidirectional seat designs, or specific project requirements. For critical service, check the valve marking, datasheet, and manufacturer documentation.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_parts_make_a_ball_valve_work\"><\/span>What parts make a ball valve work?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The main parts involved in the working principle are the body, ball, bore, stem, handle or actuator, seats, and stem seals or packing. The ball and bore control the flow path, the stem transfers torque, and the seats help create shutoff.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_a_ball_valve_the_same_as_a_ball_check_valve\"><\/span>Is a ball valve the same as a ball check valve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. A ball valve is usually a quarter-turn shutoff valve with a rotating bored ball. A ball check valve is a check valve that uses a moving ball to help prevent reverse flow. They are different valve types and should not be selected or described as the same device.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A ball valve works through a simple but important mechanism: a bored ball rotates 90 degrees inside the valve body. When the bore aligns with the pipeline, the valve is open. When the ball turns perpendicular to the flow path, the valve closes, and the seats help form the shutoff boundary.<\/p>\n<p>For industrial service, the working principle should not be separated from specification. Bore type, seat material, media condition, pressure, temperature, operating method, and shutoff requirement all affect how the valve performs in real pipelines. The basic quarter-turn principle is simple; specifying the correct bore type, seat material, service limits, media compatibility, and operation method is the engineering decision that determines whether the valve performs as expected over its service life.<\/p>\n<figure id=\"attachment_9981\" aria-describedby=\"caption-attachment-9981\" style=\"width: 1390px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9981\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-workshop-dimensional-inspection.png\" alt=\"Industrial flanged ball valve dimensional inspection in NTGD workshop\" width=\"1390\" height=\"928\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-workshop-dimensional-inspection.png 1390w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-workshop-dimensional-inspection-768x513.png 768w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-workshop-dimensional-inspection-18x12.png 18w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2026\/06\/ball-valve-flanged-workshop-dimensional-inspection-600x401.png 600w\" sizes=\"(max-width: 1390px) 100vw, 1390px\" \/><figcaption id=\"caption-attachment-9981\" class=\"wp-caption-text\">Technician checking industrial flanged ball valves during workshop inspection.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Application_Specification_Support\"><\/span>Application \/ Specification Support<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Once the working principle and service limits are understood, the next step is to confirm whether a standard on\/off ball valve fits the system or whether a more specific design should be reviewed.<\/p>\n<p>For an industrial project, prepare the service media, pressure and temperature conditions, required shutoff performance, bore preference, seat material, end connection, and operation method. These details help confirm whether a standard on\/off ball valve is suitable, or whether a full port, reduced port, V-port, floating, trunnion-mounted, or actuated ball valve should be evaluated for the service.<\/p>\n<p>For projects that require verified manufacturing quality, real product documentation, inspection records, and workshop photos can also support the final specification review when available.<\/p>\n<p><script type=\"application\/ld+json\"> { \"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [ { \"@type\": \"Question\", \"name\": \"How do ball valves work?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Ball valves work by rotating a bored ball 90 degrees inside the valve body. When the bore aligns with the pipe, fluid flows through; when the bore turns perpendicular to the pipe, the solid side of the ball blocks the path and the seats create shutoff. This fast quarter-turn movement makes ball valves useful for isolation service.\" } }, { \"@type\": \"Question\", \"name\": \"How can you tell if a manual ball valve is open or closed?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"On most manual lever-operated ball valves, the valve is open when the handle is parallel to the pipe and closed when the handle is perpendicular to the pipe. Internally, this usually means the ball bore is aligned with the pipe when open and turned 90 degrees when closed.\" } }, { \"@type\": \"Question\", \"name\": \"Which way is open on a ball valve?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"For a standard manual ball valve, the open position is usually when the handle points in the same direction as the pipe. The closed position is usually when the handle is across the pipe. For actuated valves, gear-operated valves, or special designs, confirm the position using the indicator or project documentation.\" } }, { \"@type\": \"Question\", \"name\": \"Can a standard ball valve be used partially open for throttling?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"A ball valve can physically be left partially open, but standard on\/off ball valves are not designed for precise or frequent throttling. Partial opening exposes the seat and ball edge to higher-velocity flow, which can cause accelerated wear, vibration, noise, unstable control, and premature shutoff failure. For frequent flow regulation, a V-port ball valve or a dedicated control valve should be reviewed.\" } }, { \"@type\": \"Question\", \"name\": \"Do ball valves have a flow direction?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Many standard two-way ball valves are commonly used as bidirectional shutoff valves, but this is not universal for every design. Direction may matter for valves with special venting, cavity relief features, unidirectional seat designs, or specific project requirements. For critical service, check the valve marking, datasheet, and manufacturer documentation.\" } }, { \"@type\": \"Question\", \"name\": \"What parts make a ball valve work?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"The main parts involved in the working principle are the body, ball, bore, stem, handle or actuator, seats, and stem seals or packing. The ball and bore control the flow path, the stem transfers torque, and the seats help create shutoff.\" } }, { \"@type\": \"Question\", \"name\": \"Is a ball valve the same as a ball check valve?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"No. A ball valve is usually a quarter-turn shutoff valve with a rotating bored ball. A ball check valve is a check valve that uses a moving ball to help prevent reverse flow. They are different valve types and should not be selected or described as the same device.\" } } ] } <\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Guide technique expliquant le fonctionnement d'un robinet \u00e0 boisseau sph\u00e9rique par l'alignement de l'al\u00e9sage quart de tour, les positions ouverte et ferm\u00e9e, l'\u00e9tanch\u00e9it\u00e9 du si\u00e8ge, la trajectoire du flux et les limites des services industriels.<\/p>","protected":false},"author":1,"featured_media":9988,"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-9966","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/posts\/9966","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/comments?post=9966"}],"version-history":[{"count":3,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/posts\/9966\/revisions"}],"predecessor-version":[{"id":9989,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/posts\/9966\/revisions\/9989"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/media\/9988"}],"wp:attachment":[{"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/media?parent=9966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/categories?post=9966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/tags?post=9966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}