{"id":15388,"date":"2026-06-18T06:40:06","date_gmt":"2026-06-18T06:40:06","guid":{"rendered":"https:\/\/npt-lok.com\/?p=15388"},"modified":"2026-08-18T07:26:00","modified_gmt":"2026-08-18T07:26:00","slug":"what-is-a-manifold-valve%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/","title":{"rendered":"What Is a Manifold Valve\uff1f"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">If you work with pressure transmitters, differential pressure gauges, or instrument panels, you have probably heard the term &#8220;manifold valve.&#8221; But what exactly is it\uff1fAnd why do engineers use them instead of piping together individual valves\uff1f<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This guide answers those questions in plain language. No engineering degree required.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 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\">\u76ee\u6b21<\/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;\">\u30c8\u30b0\u30eb<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" 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: #999;color:#999\" 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-4'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/#1_Manifold_Valve\" >1. Manifold Valve<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/#2_Why_Use_a_Manifold_Instead_of_Individual_Valves%EF%BC%9F\" >2. Why Use a Manifold Instead of Individual Valves\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/#3_How_Does_a_Manifold_Valve_Work%EF%BC%9F\" >3. How Does a Manifold Valve Work\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/#4_How_to_Maintain_a_Manifold_Valve\" >4. How to Maintain a Manifold Valve<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/#5_Where_Are_Manifold_Valves_Used%EF%BC%9F\" >5. Where Are Manifold Valves Used\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/#6_FAQ\" >6. FAQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/#7_Final_Thought\" >7. Final Thought<\/a><\/li><\/ul><\/nav><\/div>\n<h4><span class=\"ez-toc-section\" id=\"1_Manifold_Valve\"><\/span><span style=\"font-weight: 400;\">1. Manifold Valve<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/npt-lok.com\/ja\/%e3%83%9e%e3%83%8b%e3%83%9b%e3%83%bc%e3%83%ab%e3%83%89%e3%83%90%e3%83%ab%e3%83%96\/\"><span style=\"font-weight: 400;\">\u30de\u30cb\u30db\u30fc\u30eb\u30c9\u30d0\u30eb\u30d6<\/span><\/a><span style=\"font-weight: 400;\"> is a block of valves instead of individual valves that are connected by piping. Typical manifold valves are made of stainless steel and are equipped with <\/span><a href=\"https:\/\/npt-lok.com\/ja\/%e3%83%8b%e3%83%bc%e3%83%89%e3%83%ab%e3%83%90%e3%83%ab%e3%83%96\/\"><span style=\"font-weight: 400;\">\u30cb\u30fc\u30c9\u30eb\u30d0\u30eb\u30d6<\/span><\/a><span style=\"font-weight: 400;\">. Depending on the requirements, there are manifolds with<\/span><a href=\"https:\/\/npt-lok.com\/ja\/2%e3%82%a6%e3%82%a7%e3%82%a4%e3%83%9e%e3%83%8b%e3%83%9b%e3%83%bc%e3%83%ab%e3%83%89%e3%83%90%e3%83%ab%e3%83%96\/\"><span style=\"font-weight: 400;\"> 2<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/npt-lok.com\/ja\/3%e6%96%b9%e3%83%9e%e3%83%8b%e3%83%9b%e3%83%bc%e3%83%ab%e3%83%89%e3%83%90%e3%83%ab%e3%83%96\/\"><span style=\"font-weight: 400;\">3<\/span><\/a><span style=\"font-weight: 400;\"> \u307e\u305f\u306f<\/span><a href=\"https:\/\/npt-lok.com\/ja\/%e3%83%9e%e3%83%8b%e3%83%9b%e3%83%bc%e3%83%ab%e3%83%89%e3%83%90%e3%83%ab%e3%83%96\/5%e6%96%b9%e3%83%9e%e3%83%8b%e3%83%9b%e3%83%bc%e3%83%ab%e3%83%89%e3%83%90%e3%83%ab%e3%83%96\/\"><span style=\"font-weight: 400;\"> 5<\/span><\/a><span style=\"font-weight: 400;\"> valves.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-12510\" src=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2023\/05\/5-way-manifold-valve.jpg\" alt=\"5\u65b9\u30de\u30cb\u30db\u30fc\u30eb\u30c9\u30d0\u30eb\u30d6\" width=\"400\" height=\"400\" srcset=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2023\/05\/5-way-manifold-valve.jpg 370w, https:\/\/npt-lok.com\/wp-content\/uploads\/2023\/05\/5-way-manifold-valve-150x150.jpg 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"2_Why_Use_a_Manifold_Instead_of_Individual_Valves%EF%BC%9F\"><\/span><span style=\"font-weight: 400;\">2. Why Use a Manifold Instead of Individual Valves\uff1f<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<table>\n<tbody>\n<tr>\n<td><span style=\"font-weight: 400;\">Benefit<\/span><\/td>\n<td><span style=\"font-weight: 400;\">What It Means<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Fewer leak points<\/span><\/td>\n<td><span style=\"font-weight: 400;\">One block has fewer connections than multiple valves<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Saves space<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Fits on crowded instrument panels<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Faster installation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Mount one block, not a dozen fittings<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Easier maintenance<\/span><\/td>\n<td><span style=\"font-weight: 400;\">All valves in one place, clearly marked<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4><span class=\"ez-toc-section\" id=\"3_How_Does_a_Manifold_Valve_Work%EF%BC%9F\"><\/span><span style=\"font-weight: 400;\">3. How Does a Manifold Valve Work\uff1f<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">The Manifold Valves are mounted directly to the pressure transmitter or differential pressure transmitter. They are placed between the process pipe and the instrument.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The valves inside the block do specific jobs:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Block valves shut off the process to the instrument.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Bleed (vent) valves are used for venting the pressure trapped on the instrument side.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The equalizing valve is used to equalize high and low side pressure for a differential pressure instrument.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Open and close the required number of valves in the correct order. You can now isolate the instrument for servicing, vent off the trapped pressure or even calibrate the instrument without shutting down the process line.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-12541\" src=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2023\/05\/5-way-manifold-valve-diagram.jpg\" alt=\"5\u65b9\u30de\u30cb\u30db\u30fc\u30eb\u30c9\u30d0\u30eb\u30d6\u56f3\" width=\"400\" height=\"227\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"4_How_to_Maintain_a_Manifold_Valve\"><\/span><span style=\"font-weight: 400;\">4. How to Maintain a Manifold Valve<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Even manifold valves are designed to last for years and not need any maintenance. From time to time a little problem can occur which can be rectified immediately.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Stop Leakage<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tighten the bonnet bushing slightly to stop the leak. Do not overtighten: excessive tightening increases friction and accelerates wear.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Don\u2019t Leave Manifold Valves Unused for Long Periods<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Manifold valves left in one position for long periods can become hard to operate. Schedule periodical partial or full cycle exercising of your manifold valves.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Packing Replacement<\/span><\/p>\n<p><span style=\"font-weight: 400;\">PTFE packing rarely needs replacement. If leakage occurs, try tightening bonnet bushing first.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If replacement is needed, safely depressurize the manifold valve before removing the packing nut. Never loosen the packing nut under pressure.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"5_Where_Are_Manifold_Valves_Used%EF%BC%9F\"><\/span><span style=\"font-weight: 400;\">5. Where Are Manifold Valves Used\uff1f<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<table>\n<tbody>\n<tr>\n<td><span style=\"font-weight: 400;\">Industry<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u5fdc\u7528<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u77f3\u6cb9\u3068\u30ac\u30b9<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Wellhead control panels, offshore platforms<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u5316\u5b66\u5de5\u5834<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Pressure transmitters on reactors and distillation columns<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Power Generation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Boiler instrumentation, steam lines<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Refineries<\/span><\/td>\n<td><span style=\"font-weight: 400;\">High pressure, high temperature, sour gas service<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Water Treatment<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Pump stations, filter monitoring<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4><span class=\"ez-toc-section\" id=\"6_FAQ\"><\/span><span style=\"font-weight: 400;\">6. FAQ<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Q1: What is the difference between a 2-valve, 3-valve, and 5-valve manifold\uff1f<\/span><\/p>\n<p><span style=\"font-weight: 400;\">2-valve: one block valve and one bleed valve for gauge pressure transmitters. 3-valve: two block valves and one equalizer for differential pressure transmitters. 5-valve: same as 3-valve but with two extra bleed valves for calibration ports.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Q2: Which manifold do I need for my transmitter\uff1f<\/span><\/p>\n<p><a href=\"https:\/\/npt-lok.com\/ja\/%e5%9c%a7%e5%8a%9b%e8%a8%88%e7%94%a8%e3%83%8b%e3%83%bc%e3%83%89%e3%83%ab%e3%83%90%e3%83%ab%e3%83%96\/\"><span style=\"font-weight: 400;\">Gauge pressure<\/span><\/a><span style=\"font-weight: 400;\"> transmitter \u2192 2-valve manifold. Differential pressure transmitter \u2192 3-valve or 5-valve manifold. Need calibration ports\uff1f \u2192 5-valve manifold.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Q3: What is the correct sequence to isolate a transmitter with a 3-valve manifold\uff1f<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Open the equalizer first, then close both block valves. Closing block valves first can trap high pressure on one side and damage the sensor.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Q4: Can I mount a manifold valve directly to any pressure transmitter\uff1f<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Most modern pressure transmitters use standard mounting patterns. But not all. Check your transmitter model or send us the dimensions. We will confirm compatibility.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"7_Final_Thought\"><\/span><span style=\"font-weight: 400;\">7. Final Thought<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">A manifold valve connects a number of process instruments in one step. By using it, there is no need to install separate valves for each instrument.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">All connections required for a process are mounted on a small manifold which can then be easily serviced for leaks as required.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Need a manifold valve for your project\uff1f<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We supply stainless steel manifold valves, manufactured from 316 stainless steel. We use PTFE or graphite packing. Full traceability and a Material Test Certificate (MTC) is issued for every batch.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We can recommend the right manifold for your specific application and instruments. Please <\/span><a href=\"https:\/\/npt-lok.com\/ja\/%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6%e3%81%af%e3%81%8a%e5%95%8f%e3%81%84%e5%90%88%e3%82%8f%e3%81%9b%e3%81%8f%e3%81%a0%e3%81%95%e3%81%84\/\"><span style=\"font-weight: 400;\">\u304a\u554f\u3044\u5408\u308f\u305b<\/span><\/a><span style=\"font-weight: 400;\"> with the model of your instrument(s), operating pressure and we will get back to you as soon as possible.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>If you work with pressure transmitters, differential pressure gauges, or instrument panels, you have probably heard the term &#8220;manifold valve.&#8221; But what exactly is it\uff1fAnd why do engineers use them instead of piping together individual valves\uff1f This guide answers those questions in plain language. No engineering degree required. 1. Manifold Valve A manifold valve is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"full-width-container","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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-15388","post","type-post","status-publish","format-standard","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Is a Manifold Valve\uff1f - NPTLOK Instrumentation Tube Fittings and Valves<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/npt-lok.com\/ja\/what-is-a-manifold-valve\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is a Manifold Valve\uff1f - NPTLOK Instrumentation Tube Fittings and Valves\" \/>\n<meta property=\"og:description\" content=\"If you work with pressure transmitters, differential pressure gauges, or instrument panels, you have probably heard the term &#8220;manifold valve.&#8221; But what exactly is it\uff1fAnd why do engineers use them instead of piping together individual valves\uff1f This guide answers those questions in plain language. 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