{"id":12002,"date":"2021-11-10T10:00:23","date_gmt":"2021-11-10T18:00:23","guid":{"rendered":"https:\/\/www.linquip.com\/blog\/?p=12002"},"modified":"2022-02-24T00:21:01","modified_gmt":"2022-02-24T08:21:01","slug":"the-essential-guide-to-solenoid-valves-working-principle","status":"publish","type":"post","link":"https:\/\/www.linquip.com\/blog\/the-essential-guide-to-solenoid-valves-working-principle\/","title":{"rendered":"The Essential Guide To Solenoid Valves Working Principle"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 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: #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-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.linquip.com\/blog\/the-essential-guide-to-solenoid-valves-working-principle\/#Solenoid_Valves_Working_Principle\" >Solenoid Valves Working Principle<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.linquip.com\/blog\/the-essential-guide-to-solenoid-valves-working-principle\/#Pilot_Operated_Solenoid_Valves_Working_Principle\" >Pilot Operated Solenoid Valves Working Principle<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.linquip.com\/blog\/the-essential-guide-to-solenoid-valves-working-principle\/#Direct_Acting_Solenoid_Valves_Working_Principle\" >Direct Acting Solenoid Valves Working Principle<\/a><\/li><\/ul><\/nav><\/div>\n<p>A solenoid valve is a crucial component of any fluid control system. It is an electro-mechanical valve that is commonly employed to control the flow of liquid or gas which as a result, eradicates the need for an engineer to manually control the valve, saving time and money. Usually, solenoid valves are used whenever the flow of media has to be controlled automatically. An increasing amount of plants are taking advantage of the solenoid valve, as a variety of different designs are available, enabling the valve to be selected to suit the application in question. But how does a solenoid valve work? In this article, Linquip explains the solenoid valves working principle. Stay tuned to find out more.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Solenoid_Valves_Working_Principle\"><\/span>Solenoid Valves Working Principle<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A solenoid valve consists of two basic units: an assembly of the solenoid (the electromagnet) and plunger (the core), and a valve containing an orifice (opening) in which a disc or plug is positioned to control the flow of fluid.<\/p>\n<ul>\n<li>The valve is opened or closed by the movement of the magnetic plunger.<\/li>\n<li>When the coil is energized, the plunger is drawn into the solenoid (electromagnet), and flow through the orifice is allowed.<\/li>\n<li><img decoding=\"async\" class=\"aligncenter size-full wp-image-12006\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/image-1.png\" alt=\"Solenoid Valves Working\" width=\"384\" height=\"374\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/image-1.png 384w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/image-1-300x292.png 300w\" sizes=\"(max-width: 384px) 100vw, 384px\" \/>The valve returns automatically to its original position when the current ceases due to the pressure of spring and flow through the orifice is restricted.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-12007\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/image-2.png\" alt=\"Solenoid Valves Working\" width=\"335\" height=\"359\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/image-2.png 335w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/image-2-280x300.png 280w\" sizes=\"(max-width: 335px) 100vw, 335px\" \/><\/p>\n<ul>\n<li>The valve body is usually a special brass forging that is carefully checked and tested to ensure that there will be no leakage due to porosities. The armature, or plunger, is made from high-grade stainless steel.<\/li>\n<li>The effects of residual magnetism are eliminated by the use of a kickoff pin and spring, which prevent armature from sticking.<\/li>\n<li>A shading coil ensures that the armature will make a complete seal with the flat surface above it to eliminate noise and vibration.<\/li>\n<li>To ensure that the valve will always seat properly the strainers should be used to prevent grit or dirt from lodging in the orifice. Dirt in these locations will cause leakage.<\/li>\n<li>The inlet and outlet connections of the valve must not be reversed. The tightness of the valve depends to a degree on the pressure acting downward on the sealing disc. This pressure is possible only when the inlet is connected to the proper point as indicated on the valve.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-12004\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main.png\" alt=\"Solenoid Valves Working\" width=\"2000\" height=\"2264\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main.png 2000w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-265x300.png 265w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-905x1024.png 905w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-768x869.png 768w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-1357x1536.png 1357w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-1809x2048.png 1809w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-696x788.png 696w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-1392x1576.png 1392w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-1068x1209.png 1068w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-1920x2173.png 1920w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/2.-main-371x420.png 371w\" sizes=\"(max-width: 2000px) 100vw, 2000px\" \/><\/p>\n<p>Below you will learn about the working principle of two main types of solenoid valves.<\/p>\n<p><em><strong>Read More on Linquip<\/strong><\/em><\/p>\n<ul>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-size: 10pt;\"><a title=\"Facts About The Flow Control Valve Function\" href=\"https:\/\/www.linquip.com\/blog\/facts-about-the-flow-control-valve-function\/\" target=\"_blank\" rel=\"noopener\">Facts About The Flow Control Valve Function<\/a><\/span><\/strong><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-size: 10pt;\"><a title=\"Everything You Need To Know About Check Valve Function\" href=\"https:\/\/www.linquip.com\/blog\/everything-you-need-to-know-about-check-valve-function\/\" target=\"_blank\" rel=\"noopener\">Everything You Need To Know About Check Valve Function<\/a><\/span><\/strong><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-size: 10pt;\"><a title=\"How Valves Work in an Engine\" href=\"https:\/\/www.linquip.com\/blog\/how-valves-work-in-an-engine\/\" target=\"_blank\" rel=\"noopener\">How Valves Work in an Engine<\/a><\/span><\/strong><\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Pilot_Operated_Solenoid_Valves_Working_Principle\"><\/span>Pilot Operated Solenoid Valves Working Principle<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Two Way Pilot Operated Solenoid Valves have two chambers separated by a diaphragm. The upper chamber is connected to upstream through a pilot hole in either the cover or diaphragm. The media exerts a pressure that acts on the upper side of the diaphragm and keeps the valve closed. When the coil is charged the core lifts off the orifice seat allowing the operating chamber to de-pressurize. The thrust of the upstream pressure under the diaphragm continues, lifting the diaphragm and opening the valve.<\/li>\n<li>Pilot operated solenoid valves only operate with a suitable upstream pressure differential and do not operate at zero pressure. Also a minimum pressure differential across the valve is required to keep them open or closed. Pilot operated solenoid valves can provide high flow rates at high pressures with lower power consumption.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-12003\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main.jpg\" alt=\"\" width=\"1570\" height=\"1066\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main.jpg 1570w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main-300x204.jpg 300w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main-1024x695.jpg 1024w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main-768x521.jpg 768w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main-1536x1043.jpg 1536w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main-696x473.jpg 696w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main-1392x945.jpg 1392w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main-1068x725.jpg 1068w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/1.-main-619x420.jpg 619w\" sizes=\"(max-width: 1570px) 100vw, 1570px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Direct_Acting_Solenoid_Valves_Working_Principle\"><\/span>Direct Acting Solenoid Valves Working Principle<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Direct-acting solenoid valves do not use a diaphragm, their seal is part of the moving core. Two Way Normally Closed Direct Acting Solenoid Valves have a spring that holds the core against the seal. When the coil is charged the spring is overcome and the seal is lifted from the orifice seat thus opening the valve and allowing the media to pass through the valve.<\/li>\n<li>Two Way Normally Open Direct Acting Solenoid Valves have a fixed core which is usually in the bottom section of the armature tube. The armature is located in the upper part of the valve. A stem passes through the fixed core and is coupled to the seal. This is held off the seal by means of a spring and makes a seal when the coil is energized, thus closing the valve.<\/li>\n<li>Three-Way Direct Acting Solenoid Valves work in almost the same way as a two way direct acting solenoid valve. The fixed core has an exhaust orifice running through it. The plunger has an upper seal and lower seal allowing flow to or from either the body seat or exhaust.<\/li>\n<li>Direct-acting solenoid valves are used when there is no line pressure applied. Typical applications would include a cleaning line when a pump supplies bursts of water through the line. A direct operated solenoid valve would remain closed, even when no pressure is being applied. This is in contrast to a pilot operated valve, which requires some pressure for the valve to stay closed.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-12005\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/4.-main.jpg\" alt=\"\" width=\"1280\" height=\"720\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/4.-main.jpg 1280w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/4.-main-300x169.jpg 300w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/4.-main-1024x576.jpg 1024w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/4.-main-768x432.jpg 768w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/4.-main-696x392.jpg 696w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/4.-main-1068x601.jpg 1068w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/09\/4.-main-747x420.jpg 747w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>So, this was everything you needed to know about solenoid valves working principle. If you enjoy this article, let us know what you think by leaving a reply in the comment section. We will be more than glad to have your viewpoint on the article. Is there any question we can help you through? Feel free to <a href=\"https:\/\/www.linquip.com\/sign-up?client_redirect=\/\">sign up on Linquip<\/a> where our experts are prepared to provide you with the most professional advice.<\/p>\n<p><em><strong>Read More on Linquip<\/strong><\/em><\/p>\n<ul>\n<li><span style=\"text-decoration: underline;\"><span style=\"font-size: 10pt;\"><strong><a title=\"Solenoid Valve Manufacturers\" href=\"https:\/\/www.linquip.com\/suppliers-companies\/manufacturer?category_id=345&amp;cn=solenoid-valve\" target=\"_blank\" rel=\"noopener\">Solenoid Valve Manufacturers<\/a><\/strong><\/span><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><span style=\"font-size: 10pt;\"><strong><a title=\"Angle Valve Manufacturers\" href=\"https:\/\/www.linquip.com\/suppliers-companies\/manufacturer?category_id=340&amp;cn=angle-valve\" target=\"_blank\" rel=\"noopener\">Angle Valve Manufacturers<\/a><\/strong><\/span><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><span style=\"font-size: 10pt;\"><strong><a title=\"Pinch Valve Manufacturers\" href=\"https:\/\/www.linquip.com\/suppliers-companies\/manufacturer?category_id=994&amp;cn=pinch-valve\" target=\"_blank\" rel=\"noopener\">Pinch Valve Manufacturers<\/a><\/strong><\/span><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><span style=\"font-size: 10pt;\"><strong><a title=\"Gate Valve Manufacturers\" href=\"https:\/\/www.linquip.com\/suppliers-companies\/manufacturer?category_id=344&amp;cn=gate-valve\" target=\"_blank\" rel=\"noopener\">Gate Valve Manufacturers<\/a><\/strong><\/span><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><span style=\"font-size: 10pt;\"><strong><a title=\"Air release valve Manufacturers\" href=\"https:\/\/www.linquip.com\/suppliers-companies\/manufacturer?category_id=992&amp;cn=air-release-valve\" target=\"_blank\" rel=\"noopener\">Air release valve Manufacturers<\/a><\/strong><\/span><\/span><\/li>\n<\/ul>\n<h3><b>Buy Equipment or Ask for a Service<\/b><\/h3>\n<p>By using Linquip RFQ Service, you can expect\u00a0to receive quotations from various suppliers across multiple industries and regions.<\/p>\n<p style=\"text-align: center;\"><strong><a href=\"http:\/\/linquip.com\/get-quote?utm_source=blog&amp;utm_medium=content&amp;utm_campaign=product_list&amp;utm_term=product_list&amp;utm_content=rfq\" target=\"_blank\" rel=\"noopener\">Click Here to Request a Quotation From Suppliers and Service Providers<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A solenoid valve is a crucial component of any fluid control system. It is an electro-mechanical valve that is commonly employed to control the flow of liquid or gas which as a result, eradicates the need for an engineer to manually control the valve, saving time and money. Usually, solenoid valves are used whenever the &#8230;<\/p>\n","protected":false},"author":6,"featured_media":12008,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","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":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[13],"tags":[334],"class_list":["post-12002","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-valves","tag-device-characteristic"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/posts\/12002","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/comments?post=12002"}],"version-history":[{"count":0,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/posts\/12002\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/media\/12008"}],"wp:attachment":[{"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/media?parent=12002"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/categories?post=12002"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/tags?post=12002"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}