{"id":14751,"date":"2026-02-08T21:00:00","date_gmt":"2026-02-08T13:00:00","guid":{"rendered":"https:\/\/www.xintaivalves.com\/?p=14751"},"modified":"2026-03-06T11:21:52","modified_gmt":"2026-03-06T03:21:52","slug":"calculate-globe-valve-pressure-drop","status":"publish","type":"post","link":"https:\/\/www.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/","title":{"rendered":"\u0917\u094d\u0932\u094b\u092c \u0935\u093e\u0932\u094d\u0935 \u0915\u0947 \u0906\u0930-\u092a\u093e\u0930 \u0926\u093e\u092c \u0905\u0935\u0915\u0932\u0928 \u0915\u0940 \u0917\u0923\u0928\u093e \u0915\u0948\u0938\u0947 \u0915\u0930\u0947\u0902: \u091a\u0930\u0923-\u0926\u0930-\u091a\u0930\u0923 \u092e\u093e\u0930\u094d\u0917\u0926\u0930\u094d\u0936\u093f\u0915\u093e"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 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 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#1_Why_Pressure_Drop_is_Higher_in_Globe_Valves_vs_Ball_Valves\" >1. Why Pressure Drop is Higher in Globe Valves vs. Ball Valves<\/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.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#2_How_to_use_the_K-Factor_in_the_Darcy-Weisbach_Equation\" >2. How to use the K-Factor in the Darcy-Weisbach Equation?<\/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.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#3_Key_Variables_Affecting_Pressure_Drop_Velocity_and_Viscosity\" >3. Key Variables Affecting Pressure Drop: Velocity and Viscosity<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#Step_1_Find_out_the_Fluid_Velocity_v\" >Step 1: Find out the Fluid Velocity (v)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#Step_2_Identify_Fluid_Density_%CF%81\" >Step 2: Identify Fluid Density (\u03c1)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#Step_3_Locate_the_Valve_K-Factor\" >Step 3: Locate the Valve K-Factor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#Step_4_Do_the_Equation\" >Step 4: Do the Equation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#4_Calculation_Example\" >4. Calculation Example<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.xintaivalves.com\/hi\/blog\/operation-guide\/calculate-globe-valve-pressure-drop\/#Final_Thoughts\" >Final Thoughts<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Engineers working on <a href=\"https:\/\/www.xintaivalves.com\/product\/globe-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">industrial globe valves<\/a> primarily focus on pressure drop (\u0394P). The calculation refers to the difference in the pressure between the valve\u2019s downstream and upstream sides. Energy loss management is a crucial component of industrial piping system design and maintenance.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The succeeding sections cover everything about a valve\u2019s pressure drop and provide a technical walkthrough for calculating it, ensuring your system remains efficient and that your <strong><a href=\"https:\/\/www.xintaivalves.com\/blog\/flow-control-valve-comprehensive-guide\/\" target=\"_blank\" rel=\"noreferrer noopener\">globe valves for flow control<\/a><\/strong> operate within their intended parameters.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Why_Pressure_Drop_is_Higher_in_Globe_Valves_vs_Ball_Valves\"><\/span><strong>1. Why Pressure Drop is Higher in Globe Valves vs. Ball Valves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<p class=\"wp-block-paragraph\">It is important to understand why <strong>industrial globe valves<\/strong> require more energy than &#8220;full-port&#8221; designs like ball valves. A ball valve has a straight-through flow path with limited obstruction. On the other hand, globe valves force the fluid to change direction twice &#8211; up through the seat orifice and moving through an \u2018s-shaped\u2019 path.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:40%\">\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/03\/gate-vs-globe-path-difference.webp\" alt=\"gate-vs-globe-path-difference\" class=\"wp-image-14756\" srcset=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/03\/gate-vs-globe-path-difference.webp 600w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/03\/gate-vs-globe-path-difference-300x200.webp 300w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/03\/gate-vs-globe-path-difference-18x12.webp 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">This complex path creates high turbulence and friction, leading to a much higher pressure drop. While a ball valve is ideal for on\/off service with low energy loss, the globe design is purposely restrictive. This is what enables the precise regulation necessary for globe valves in<strong> flow control<\/strong>.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_How_to_use_the_K-Factor_in_the_Darcy-Weisbach_Equation\"><\/span><strong>2. How to use the K-Factor in the Darcy-Weisbach Equation?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Experts and engineers use the Resistance Coefficient (K-factor) to identify the pressure drop across cast steel globe valves. It represents the number of velocity heads lost as fluid passes through the valve. Since the globe valve has a more restrictive design, it usually has a higher K-value (approximately 3.0 to 10.0) than ball valves (about 0.05).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Meanwhile, the Darcy-Weisbach equation was used in the 19th century to identify the pressure loss in straight pipes. The Darcy-Weisbach equation and the K-factor are used for fine-tuned throttling. The primary formula used in this guide is a variation of the <strong>Darcy-Weisbach equation<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0394P = K * [ (\u03c1 * v\u00b2) \/ 2 ]<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u0394P<\/strong> = Pressure drop (Pascals or psi)<\/li>\n\n\n\n<li><strong>K<\/strong> = The dimensionless resistance coefficient of the valve<\/li>\n\n\n\n<li><strong>\u03c1 (rho)<\/strong> = Fluid density(kg\/m\u00b3)<\/li>\n\n\n\n<li><strong>v<\/strong> = Fluid velocity (m\/s)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Take note that the K-factor is not a static number. For example, when a valve manufacturer declares a 7.0 K-factor if the valve is fully opened, that number can increase when the valve is closed. Calculating the pressure drop for several K-factors enables engineers to predict the system\u2019s behavior at different phases of operation. This guarantees that <strong>industrial globe valves <\/strong>fit the pipe and perform efficiently under specific hydraulic stresses.&nbsp;<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <title>Hero Product Highlight<\/title>\n  <style>\n    .hero-card {\n      display: flex;\n      flex-wrap: wrap;\n      align-items: center;\n      background: #f7f8fa;\n      border-radius: 16px;\n      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);\n      padding: 24px;\n      max-width: 900px;\n      margin: 40px auto;\n      font-family: Arial, sans-serif;\n      text-decoration: none;\n      color: inherit;\n      font-family: 'Poppins';\n    }\n\n    .hero-image {\n      width: 220px;\n      height: auto;\n      border-radius: 12px;\n      object-fit: cover;\n      flex-shrink: 0;\n    }\n\n    .hero-content {\n      padding-left: 24px;\n      flex: 1;\n      min-width: 260px;\n    }\n\n    .hero-title {\n      font-size: 1.6rem;\n      font-weight: bold;\n      margin-bottom: 12px;\n      color: #222;\n      font-family: 'Poppins';\n    }\n\n    .hero-description {\n      font-size: 1rem;\n      color: #555;\n      margin-bottom: 18px;\n    }\n\n    .hero-link {\n      display: inline-block;\n      padding: 10px 20px;\n      background-color: #D70C19;\n      color: #fff;\n      text-decoration: none;\n      border-radius: 8px;\n      font-weight: bold;\n      transition: background 0.2s ease-in-out;\n    }\n\n    .hero-link:hover {\n      background-color: #D70C19;\n    }\n\n    @media (max-width: 640px) {\n      .hero-card {\n        flex-direction: column;\n        text-align: center;\n      }\n\n      .hero-content {\n        padding-left: 0;\n        padding-top: 20px;\n      }\n\n      .hero-image {\n        width: 100%;\n        max-width: 280px;\n      }\n    }\n  <\/style>\n<\/head>\n<body>\n\n<a class=\"hero-card\" href=\"https:\/\/www.xintaivalves.com\/products\/bs-1873-globe-valve\/\" target=\"_blank\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/dbfhaf64fpo53.cloudfront.net\/wp-content\/uploads\/2022\/02\/%E6%9C%AA%E6%A0%87%E9%A2%98-1-4.jpg\" alt=\"BS 1873 GLOBE VALVE\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">\u2699\ufe0f BS 1873 GLOBE VALVE<\/div>\n    <div class=\"hero-description\">Xintai BS 1873 valves are constructed from robust steel materials, ensuring exceptional durability under high-pressure and high-temperature conditions.<\/div>\n    <span class=\"hero-link\">Explore Product<\/span>\n  <\/div>\n<\/a>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Key_Variables_Affecting_Pressure_Drop_Velocity_and_Viscosity\"><\/span><strong>3. Key Variables Affecting Pressure Drop: Velocity and Viscosity<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Besides the usual density and speed calculations, it\u2019s also vital to know two of the most crucial variables in pressure drop &#8211; viscosity and velocity.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Velocity (v) is squared in the equation and is considered the most sensitive variable. If the flow velocity doubles, a quadrupled pressure drop is expected. Meanwhile, viscosity is key in identifying the flow regime, whether the fluid is flowing in smooth layers or chaotic swirls.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Look closely at the following steps. They help determine the pressure loss for a specific installation.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_1_Find_out_the_Fluid_Velocity_v\"><\/span><strong>Step 1: Find out the Fluid Velocity (v)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Note the flow speed in meters per second. If it\u2019s only the <a href=\"https:\/\/www.xintaivalves.com\/blog\/what-is-valve-flow-coefficient\/\" target=\"_blank\" rel=\"noreferrer noopener\">flow rate<\/a> (Q), compute the velocity using v = Q\/A. \u2018A\u2019 refers to the pipe\u2019s cross-sectional area.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_2_Identify_Fluid_Density_%CF%81\"><\/span><strong>Step 2: Identify Fluid Density (\u03c1)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The medium density must be in kg\/m\u00b3. Water at a standard temperature is about 1000 kg\/m\u00b3. Densities might vary In industries that handle heavy chemicals.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_3_Locate_the_Valve_K-Factor\"><\/span><strong>Step 3: Locate the Valve K-Factor<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The K-factor is usually provided in the technical data sheets from your valve manufacturer. Note that as the valve is throttled (closed), the effective K-factor increases. For a fully open <strong>industrial globe valve<\/strong>, 6.0 is a common average.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_4_Do_the_Equation\"><\/span><strong>Step 4: Do the Equation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Input the variables into the Darcy-Weisbach formula.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Calculation_Example\"><\/span><strong>4. Calculation Example<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A facility manager opens a 4-inch <strong>industrial globe valve <\/strong>with a K-factor of 6.0 and pumps water with a density of 1000 kg\/m\u00b3 at a velocity of 2 m\/s.&nbsp;<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>v\u00b2:<\/strong> 2\u00d72=4<\/li>\n\n\n\n<li><strong>Velocity head:<\/strong> (1000\u00d74)\/2=2000<\/li>\n\n\n\n<li><strong>Final \u0394P:<\/strong> 6.0\u00d72000=12,000 Pascals (around 1.74 psi)<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">If the velocity increases to 4 m\/s, expect the drop jumps to about 7 psi. Here lies the essence of maintaining liquid velocity within the recommended range of 5 to 10 feet per second. This prevents too much energy waste in <strong>globe valves for flow control.&nbsp;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Final_Thoughts\"><\/span><strong>Final Thoughts<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mastery in pressure drop calculation allows engineers and facility managers to optimize their systems. By understanding the relationship between the Darcy-Weisbach equation and the K-factor, experts can identify where energy is lost. This gives them the opportunity to take the initiative to reduce operational costs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most importantly, choosing the premium quality <strong>cast steel globe valves <\/strong>guarantees that <strong>globe valves for flow control <\/strong>provide the necessary regulation without compromise.\u00a0<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-vivid-red-background-color has-text-color has-background has-link-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/www.xintaivalves.com\/contact\/\" style=\"font-style:normal;font-weight:500\" target=\"_blank\" rel=\"noreferrer noopener\">Get Quote<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Engineers working on industrial globe valves primarily focus on pressure drop (\u0394P). The calculation refers to the difference in the pressure between the valve\u2019s downstream and upstream sides. Energy loss management is a crucial component of industrial piping system design and maintenance.\u00a0 The succeeding sections cover everything about a valve\u2019s pressure drop and provide a [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":14754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[307],"tags":[],"class_list":["post-14751","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-operation-guide"],"_links":{"self":[{"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/posts\/14751","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/comments?post=14751"}],"version-history":[{"count":1,"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/posts\/14751\/revisions"}],"predecessor-version":[{"id":14758,"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/posts\/14751\/revisions\/14758"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/media\/14754"}],"wp:attachment":[{"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/media?parent=14751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/categories?post=14751"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/hi\/wp-json\/wp\/v2\/tags?post=14751"}],"curies":[{"name":"\u0921\u092c\u094d\u0932\u094d\u092f\u0942\u092a\u0940","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}