{"id":1320,"date":"2026-10-29T15:23:37","date_gmt":"2026-10-29T15:23:37","guid":{"rendered":"https:\/\/fldvalve.com\/?p=1320"},"modified":"2026-10-29T15:23:39","modified_gmt":"2026-10-29T15:23:39","slug":"l-port-vs-t-port-ball-valves-get-the-flow-path-right-before-you-order","status":"publish","type":"post","link":"https:\/\/fldvalve.com\/fr\/l-port-vs-t-port-ball-valves-get-the-flow-path-right-before-you-order\/","title":{"rendered":"Vannes \u00e0 bille \u00e0 port en L ou \u00e0 port en T : obtenez le chemin d'\u00e9coulement juste avant de commander"},"content":{"rendered":"<p class=\"wp-block-paragraph\">When one process line needs to serve two destinations, a three-way ball valve can make the piping arrangement simpler. The selection gets less straightforward when you need both branches open, a defined shut-off position or a particular flow path after an air failure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That\u2019s where the port arrangement matters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An L-port typically switches a common connection between two branches. A T-port allows additional connections, including an all-three-connected position where the valve design permits it. The right choice depends on how your system needs to operate\u2014not just how many connections the valve has.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For projects using Phileda\u2019s <a href=\"https:\/\/fldvalve.com\/fr\/product\/pneumatic-three-way-ball-valve\/\">Vanne \u00e0 bille pneumatique \u00e0 trois voies<\/a>, start with a sketch of the required flow paths. That gives the selection team a clear basis for confirming the valve configuration and pneumatic operation.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table des mati\u00e8res<\/h2><nav><ul><li><a href=\"#where-philedas-pneumatic-three-way-ball-valve-fits\">Where Phileda\u2019s pneumatic three-way ball valve fits<\/a><\/li><li><a href=\"#l-port-or-t-port-start-with-the-piping\">L-port or T-port? Start with the piping<\/a><\/li><li><a href=\"#the-pneumatic-actuator-needs-to-match-the-routing-sequence\">The pneumatic actuator needs to match the routing sequence<\/a><\/li><li><a href=\"#check-what-happens-between-positions\">Check what happens between positions<\/a><\/li><li><a href=\"#make-sure-a-three-way-valve-is-the-product-you-need\">Make sure a three-way valve is the product you need<\/a><\/li><li><a href=\"#what-to-send-phileda-for-a-three-way-valve-quotation\">What to send Phileda for a three-way valve quotation<\/a><\/li><li><a href=\"#common-questions\">FAQ<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 id=\"where-philedas-pneumatic-three-way-ball-valve-fits\" class=\"wp-block-heading\">Where Phileda\u2019s pneumatic three-way ball valve fits<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf05.jpg\" alt=\"Vanne \u00e0 bille pneumatique \u00e0 trois voies\" class=\"wp-image-460\" srcset=\"https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf05.jpg 800w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf05-300x300.jpg 300w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf05-150x150.jpg 150w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf05-768x768.jpg 768w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf05-600x600.jpg 600w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf05-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Phileda\u2019s pneumatic three-way ball valve is intended for diverting, combining and switching media between pipeline connections. Its pneumatic drive makes it a product to consider for automated routing duties, including process-line switching, media distribution and water-treatment circuits. <a href=\"https:\/\/fldvalve.com\/fr\/product\/pneumatic-three-way-ball-valve\/\">View the product details<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A typical inquiry might involve one supply feeding either of two tanks. Another might involve switching a line between production and return service.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In both cases, the first question is the same: <strong>which connections must be open at each operating position?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Write that sequence down before choosing the port arrangement.<\/p>\n\n\n\n<h2 id=\"l-port-or-t-port-start-with-the-piping\" class=\"wp-block-heading\">L-port or T-port? Start with the piping<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The letters describe the passages through the ball. An L-shaped passage connects two ports at a time. A T-shaped passage provides more possible connections, although the positions available in the finished assembly depend on its construction and travel limits.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Your process requirement<\/th><th>Arrangement to discuss with the supplier<\/th><\/tr><\/thead><tbody><tr><td>Send one supply to either of two destinations<\/td><td>L-port switching arrangement<\/td><\/tr><tr><td>Select between two sources feeding one line<\/td><td>L-port, subject to permitted flow direction and sealing requirements<\/td><\/tr><tr><td>Connect a common line to both branches<\/td><td>T-port arrangement with an appropriate all-three-connected position<\/td><\/tr><tr><td>Combine two streams<\/td><td>Suitable T-port or other mixing arrangement, with hydraulic conditions reviewed<\/td><\/tr><tr><td>Isolate all connections<\/td><td>A design with a confirmed off position and specified leakage performance<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These are starting points for selection. Approval should be based on the flow diagram for the actual valve being supplied.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For an example of manufacturer-specific switching arrangements, see <a href=\"https:\/\/www.swagelok.com.cn\/downloads\/webcatalogs\/en\/ms-01-146.pdf\" target=\"_blank\" rel=\"noopener\">Swagelok\u2019s ball valve technical catalog<\/a>. Always confirm the flow diagram for the valve you intend to purchase.<\/p>\n\n\n\n<h2 id=\"the-pneumatic-actuator-needs-to-match-the-routing-sequence\" class=\"wp-block-heading\">The pneumatic actuator needs to match the routing sequence<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Choosing the ball passage is only half the job. The actuator must move it to the required positions and stop it in the right places.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For an automated assembly, confirm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The number of operating positions.<\/li>\n\n\n\n<li>The permitted rotation and travel stops.<\/li>\n\n\n\n<li>Minimum available instrument-air pressure.<\/li>\n\n\n\n<li>Pressure conditions used for actuator sizing.<\/li>\n\n\n\n<li>Required position indication.<\/li>\n\n\n\n<li>The flow path after loss of air, power or signal.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Be especially careful with the terms \u201cfail open\u201d and \u201cfail closed.\u201d On a three-way valve, they can mean different things to different people.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A better specification is:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">On loss of instrument air, connect the common line to the return branch and isolate the production branch.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">That describes the process result. The proposed actuator and accessory arrangement can then be checked against it.<\/p>\n\n\n\n<h2 id=\"check-what-happens-between-positions\" class=\"wp-block-heading\">Check what happens between positions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A valve may provide the correct routing at both ends of its travel but briefly connect other paths while turning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That can matter when switching between different fluids, lines at different pressures, or production and cleaning circuits.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the two branches must remain separate, state that requirement explicitly. Ask whether cross-connection occurs during travel and whether the proposed assembly is suitable for the duty.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also distinguish a closed flow path from an acceptable isolation boundary. If a branch must be isolated for maintenance, its leakage requirements and the plant\u2019s isolation procedure need a separate review.<\/p>\n\n\n\n<h2 id=\"make-sure-a-three-way-valve-is-the-product-you-need\" class=\"wp-block-heading\">Make sure a three-way valve is the product you need<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf03.jpg\" alt=\"Vanne \u00e0 bille pneumatique \u00e0 port en V\" class=\"wp-image-275\" srcset=\"https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf03.jpg 800w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf03-300x300.jpg 300w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf03-150x150.jpg 150w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf03-768x768.jpg 768w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf03-600x600.jpg 600w, https:\/\/fldvalve.com\/wp-content\/uploads\/2026\/01\/qf03-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Some inquiries begin with a request for a three-way valve when the real requirement is continuous flow regulation or simple on\/off control.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">celle de Phileda <a href=\"https:\/\/fldvalve.com\/fr\/product-category\/ball-valve\/\">ball valve range<\/a> lists several distinct product types:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Product<\/th><th>Requirement to discuss during selection<\/th><\/tr><\/thead><tbody><tr><td><strong>Vanne \u00e0 bille pneumatique \u00e0 trois voies<\/strong><\/td><td>Routing flow between three pipeline connections<\/td><\/tr><tr><td><strong>Vanne \u00e0 bille de r\u00e9gulation pneumatique \u00e0 port en V<\/strong><\/td><td>A duty requiring flow regulation rather than branch selection alone<\/td><\/tr><tr><td><strong>Robinet \u00e0 tournant sph\u00e9rique actionn\u00e9 par interrupteur pneumatique<\/strong><\/td><td>A line that primarily needs automated opening and closing<\/td><\/tr><tr><td><strong>Vanne \u00e0 bille en c\u00e9ramique pneumatique<\/strong><\/td><td>A material-selection inquiry where the medium and wear conditions need review<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These products should not be treated as interchangeable. Explain what the process must do, then have the proposed structure checked against the operating conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, combining two streams through a three-way valve does not automatically maintain a mixing ratio or outlet temperature. If accurate regulation is required, include the control objective in the inquiry.<\/p>\n\n\n\n<h2 id=\"what-to-send-phileda-for-a-three-way-valve-quotation\" class=\"wp-block-heading\">What to send Phileda for a three-way valve quotation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A marked-up piping sketch is the most useful place to start. Label each connection and show the required flow path at every operating position.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Medium and operating temperature.<\/li>\n\n\n\n<li>Pressure at each connection.<\/li>\n\n\n\n<li>Required flow and allowable pressure drop.<\/li>\n\n\n\n<li>Connection size and standard.<\/li>\n\n\n\n<li>Material and leakage requirements.<\/li>\n\n\n\n<li>Switching frequency.<\/li>\n\n\n\n<li>Available air supply.<\/li>\n\n\n\n<li>Required failure routing.<\/li>\n\n\n\n<li>Any restrictions on cross-connection during travel.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ask for the proposed flow diagram with the quotation. Review it against your piping sketch before approving the valve assembly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To discuss a routing application, send these details with your inquiry for the <a href=\"https:\/\/fldvalve.com\/fr\/product\/pneumatic-three-way-ball-valve\/\">Phileda Pneumatic Three Way Ball Valve<\/a>. Confirming the port sequence early helps avoid ordering a valve that fits the pipework but connects the wrong lines.<\/p>\n\n\n\n<h2 id=\"common-questions\" class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<h3 id=\"does-philedas-three-way-ball-valve-come-with-an-l-port-or-t-port\" class=\"wp-block-heading\">Does Phileda\u2019s three-way ball valve come with an L-port or T-port?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Confirm the available arrangement with Phileda for your application. Include a flow-path sketch so the proposed configuration can be checked against the required sequence.<\/p>\n\n\n\n<h3 id=\"can-a-t-port-valve-split-flow-equally-between-two-branches\" class=\"wp-block-heading\">Can a T-port valve split flow equally between two branches?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Connecting both branches does not guarantee an equal split. Branch pressure and resistance affect how much flow goes each way.<\/p>\n\n\n\n<h3 id=\"can-a-pneumatic-three-way-ball-valve-shut-off-all-flow\" class=\"wp-block-heading\">Can a pneumatic three-way ball valve shut off all flow?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">That depends on the valve design and permitted positions. Request confirmation of the off position, if required, and the applicable leakage specification.<\/p>\n\n\n\n<h3 id=\"should-i-choose-a-three-way-valve-or-a-v-port-regulating-ball-valve\" class=\"wp-block-heading\">Should I choose a three-way valve or a V-port regulating ball valve?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Start with the duty. A three-way valve routes flow between connections. If the main requirement is continuous regulation, discuss the control range and operating conditions when reviewing a V-port regulating design.<\/p>","protected":false},"excerpt":{"rendered":"<p>Compare L-port and T-port flow paths, then see what to specify when choosing a Phileda pneumatic three-way ball valve for your process.<\/p>","protected":false},"author":2,"featured_media":1321,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1320","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/posts\/1320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/comments?post=1320"}],"version-history":[{"count":1,"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/posts\/1320\/revisions"}],"predecessor-version":[{"id":1322,"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/posts\/1320\/revisions\/1322"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/media\/1321"}],"wp:attachment":[{"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/media?parent=1320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/categories?post=1320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fldvalve.com\/fr\/wp-json\/wp\/v2\/tags?post=1320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}