{"id":18734,"date":"2026-10-10T14:40:09","date_gmt":"2026-10-10T14:40:09","guid":{"rendered":"https:\/\/oudianvalve.com\/?p=18734"},"modified":"2026-10-10T14:40:09","modified_gmt":"2026-10-10T14:40:09","slug":"iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators","status":"publish","type":"post","link":"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/","title":{"rendered":"ISO 5211 Mounting Flange Dimensions: Complete Guide for Valve Actuators"},"content":{"rendered":"<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\">Sommario<\/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;\">Attiva\/disattiva<\/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:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Introduction\" >introduzione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#1_What_Is_ISO_5211\" >1. What Is ISO 5211?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#2_Understanding_ISO_5211_Flange_Types\" >2. Understanding ISO 5211 Flange Types<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#3_ISO_5211_Mounting_Flange_Dimensions_Chart\" >3. ISO 5211 Mounting Flange Dimensions Chart<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#4_What_Do_the_ISO_5211_Dimensions_Mean\" >4. What Do the ISO 5211 Dimensions Mean?<\/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:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#41_Mounting_Flange_Dimensions\" >4.1 Mounting Flange Dimensions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#42_Bolt_Pattern_and_Thread_Size\" >4.2 Bolt Pattern and Thread Size<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#43_Drive_Interface\" >4.3 Drive Interface<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#44_Mounting_Height_and_Clearance\" >4.4 Mounting Height and Clearance<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#5_How_to_Select_the_Correct_ISO_5211_Mounting_Flange\" >5. How to Select the Correct ISO 5211 Mounting Flange<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Step_1_Identify_the_Valve_Type\" >Step 1: Identify the Valve Type<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Step_2_Confirm_the_Valve_Mounting_Interface\" >Step 2: Confirm the Valve Mounting Interface<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Step_3_Calculate_or_Obtain_the_Required_Torque\" >Step 3: Calculate or Obtain the Required Torque<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Step_4_Select_a_Compatible_Actuator\" >Step 4: Select a Compatible Actuator<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Step_5_Verify_the_Complete_Assembly\" >Step 5: Verify the Complete Assembly<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#6_ISO_5211_for_Butterfly_Valves\" >6. ISO 5211 for Butterfly Valves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#7_ISO_5211_for_Ball_Valves\" >7. ISO 5211 for Ball Valves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#8_Common_Problems_When_Matching_ISO_5211_Flanges\" >8. Common Problems When Matching ISO 5211 Flanges<\/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:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Problem_1_The_Flange_Fits_but_the_Drive_Does_Not\" >Problem 1: The Flange Fits but the Drive Does Not<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Problem_2_The_Actuator_Torque_Is_Insufficient\" >Problem 2: The Actuator Torque Is Insufficient<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Problem_3_Incorrect_Fasteners\" >Problem 3: Incorrect Fasteners<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Problem_4_Confusing_Flange_Type_With_Valve_Size\" >Problem 4: Confusing Flange Type With Valve Size<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Problem_5_Ignoring_Environmental_Conditions\" >Problem 5: Ignoring Environmental Conditions<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#9_Frequently_Asked_Questions_About_ISO_5211\" >9. Frequently Asked Questions About ISO 5211<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#What_is_ISO_5211_used_for\" >What is ISO 5211 used for?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#What_does_F05_mean_in_ISO_5211\" >What does F05 mean in ISO 5211?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Are_all_ISO_5211_actuators_interchangeable\" >Are all ISO 5211 actuators interchangeable?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Can_ISO_5211_be_used_for_pneumatic_and_electric_actuators\" >Can ISO 5211 be used for pneumatic and electric actuators?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#Does_ISO_5211_specify_actuator_torque\" >Does ISO 5211 specify actuator torque?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#How_can_I_confirm_an_actuator_is_compatible_with_my_valve\" >How can I confirm an actuator is compatible with my valve?<\/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:\/\/oudianvalve.com\/it\/2026\/10\/iso-5211-mounting-flange-dimensions-complete-guide-for-valve-actuators\/#10_Conclusion\" >10. Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-pm-slice=\"1 1 []\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>introduzione<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>When selecting a pneumatic actuator, electric actuator, or gearbox for an industrial valve, the mounting interface is an important consideration. The actuator must fit the valve mounting flange correctly and transmit sufficient torque to operate the valve safely and reliably.<\/p>\n<p><strong><a href=\"https:\/\/globalsupplyline.com.au\/blog-post\/iso-5211-mss-sp-101-mount-flange-dimension-comparison\/\">ISO 5211<\/a> is an international standard for part-turn actuator attachments used on industrial valves.<\/strong> It establishes standardized mounting interfaces to help ensure dimensional compatibility between valves and actuators.<\/p>\n<p>ISO 5211 mounting flange dimensions are commonly used in applications involving butterfly valves, ball valves, plug valves, pneumatic actuators, electric actuators, and manual gearboxes.<\/p>\n<p>This guide explains the main ISO 5211 flange types, their dimensional characteristics, how to read an ISO 5211 flange chart, and what engineers should check before selecting an actuator.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"1_What_Is_ISO_5211\"><\/span>1. What Is ISO 5211?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/cncontrolvalve.com\/wp-content\/uploads\/2024\/06\/ISO-5211-mounted-flange-dimensions-.png\" alt=\"iso 5211 mounted flange dimensions\" \/><\/p>\n<p>ISO 5211 specifies requirements for the attachment interfaces between industrial valves and part-turn actuators.<\/p>\n<p>A part-turn actuator rotates the valve stem through a limited angle, commonly 90 degrees, to open or close a valve. Examples include pneumatic rack-and-pinion actuators, pneumatic scotch-yoke actuators, electric quarter-turn actuators, and manual worm gearboxes.<\/p>\n<p>The standard helps define the mechanical interface between the valve and actuator, including mounting flange dimensions and drive arrangements.<\/p>\n<p>Typical applications include:<\/p>\n<ul data-spread=\"false\">\n<li>Butterfly valves<\/li>\n<li>Valvole a sfera<\/li>\n<li>Plug valves<\/li>\n<li>Attuatori pneumatici<\/li>\n<li>Attuatori elettrici<\/li>\n<li>Manual worm gearboxes<\/li>\n<li>Automated process control systems<\/li>\n<\/ul>\n<p>An ISO 5211 mounting interface can simplify actuator replacement, automation upgrades, and integration of valves and actuators from different manufacturers.<\/p>\n<p>However, <strong>matching the flange designation alone does not guarantee that an actuator is suitable for a valve<\/strong>. Drive dimensions, torque requirements, mounting height, and operating conditions must also be checked.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2_Understanding_ISO_5211_Flange_Types\"><\/span>2. Understanding ISO 5211 Flange Types<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>ISO 5211 mounting interfaces use designations such as F03, F04, F05, F07, F10, F12, F14, F16, F25, F30, F35, F40, F48, F60, F80, and F100.<\/p>\n<p>The designation identifies a standardized interface configuration. It should not be interpreted as the valve nominal size or the actuator&#8217;s torque rating by itself.<\/p>\n<p>For example, an F05 interface may be used with a suitable actuator and valve assembly, but the required drive geometry and torque capacity still need verification.<\/p>\n<p>Common flange designations include:<\/p>\n<table>\n<tbody>\n<tr>\n<th>Flange type<\/th>\n<th>Typical application context<\/th>\n<\/tr>\n<tr>\n<td>F03 \/ F04<\/td>\n<td>Compact part-turn actuators and smaller valve assemblies<\/td>\n<\/tr>\n<tr>\n<td>F05 \/ F07<\/td>\n<td>Small to medium actuator interfaces<\/td>\n<\/tr>\n<tr>\n<td>F10 \/ F12<\/td>\n<td>Medium-sized actuator and valve assemblies<\/td>\n<\/tr>\n<tr>\n<td>F14 \/ F16<\/td>\n<td>Larger actuator mounting interfaces<\/td>\n<\/tr>\n<tr>\n<td>F25 \/ F30<\/td>\n<td>Larger industrial actuator assemblies<\/td>\n<\/tr>\n<tr>\n<td>F35 and above<\/td>\n<td>Larger mounting interfaces for demanding applications<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>These are general application examples, not mandatory valve-size assignments. The correct flange type depends on the actuator design, valve mounting interface, and required operating torque.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3_ISO_5211_Mounting_Flange_Dimensions_Chart\"><\/span>3. ISO 5211 Mounting Flange Dimensions Chart<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The following reference table summarizes key dimensions from the ISO 5211:2023 flange-dimension table. Dimensions are in millimetres.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Flange type<\/th>\n<th>d1 min. (mm)<\/th>\n<th>d2 max. (mm)<\/th>\n<th>d3 min. (mm)<\/th>\n<th>Thread<\/th>\n<th>h1 max. (mm)<\/th>\n<th>h2 min. (mm)<\/th>\n<th>h3 min. (mm)<\/th>\n<th>No. of fasteners<\/th>\n<\/tr>\n<tr>\n<td>F03<\/td>\n<td>46<\/td>\n<td>25<\/td>\n<td>36<\/td>\n<td>M5<\/td>\n<td>3<\/td>\n<td>8<\/td>\n<td>5<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>F04<\/td>\n<td>54<\/td>\n<td>30<\/td>\n<td>42<\/td>\n<td>M5<\/td>\n<td>3<\/td>\n<td>8<\/td>\n<td>5<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>F05<\/td>\n<td>65<\/td>\n<td>35<\/td>\n<td>50<\/td>\n<td>M6<\/td>\n<td>3<\/td>\n<td>9<\/td>\n<td>6<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>F07<\/td>\n<td>90<\/td>\n<td>55<\/td>\n<td>70<\/td>\n<td>M8<\/td>\n<td>3<\/td>\n<td>12<\/td>\n<td>8<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>F10<\/td>\n<td>125<\/td>\n<td>70<\/td>\n<td>102<\/td>\n<td>M10<\/td>\n<td>3<\/td>\n<td>15<\/td>\n<td>10<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>F12<\/td>\n<td>150<\/td>\n<td>85<\/td>\n<td>125<\/td>\n<td>M12<\/td>\n<td>3<\/td>\n<td>18<\/td>\n<td>12<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>F14<\/td>\n<td>175<\/td>\n<td>100<\/td>\n<td>140<\/td>\n<td>M16<\/td>\n<td>4<\/td>\n<td>24<\/td>\n<td>16<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>F16<\/td>\n<td>210<\/td>\n<td>130<\/td>\n<td>165<\/td>\n<td>M20<\/td>\n<td>5<\/td>\n<td>30<\/td>\n<td>20<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>F25<\/td>\n<td>300<\/td>\n<td>200<\/td>\n<td>254<\/td>\n<td>M16<\/td>\n<td>5<\/td>\n<td>24<\/td>\n<td>16<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>F30<\/td>\n<td>350<\/td>\n<td>230<\/td>\n<td>298<\/td>\n<td>M20<\/td>\n<td>5<\/td>\n<td>30<\/td>\n<td>20<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>F35<\/td>\n<td>415<\/td>\n<td>260<\/td>\n<td>356<\/td>\n<td>M30<\/td>\n<td>5<\/td>\n<td>45<\/td>\n<td>30<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>F40<\/td>\n<td>475<\/td>\n<td>300<\/td>\n<td>406<\/td>\n<td>M36<\/td>\n<td>8<\/td>\n<td>54<\/td>\n<td>36<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>F48<\/td>\n<td>560<\/td>\n<td>370<\/td>\n<td>483<\/td>\n<td>M36<\/td>\n<td>8<\/td>\n<td>54<\/td>\n<td>36<\/td>\n<td>12<\/td>\n<\/tr>\n<tr>\n<td>F60<\/td>\n<td>686<\/td>\n<td>470<\/td>\n<td>603<\/td>\n<td>M36<\/td>\n<td>8<\/td>\n<td>54<\/td>\n<td>36<\/td>\n<td>20<\/td>\n<\/tr>\n<tr>\n<td>F80<\/td>\n<td>900<\/td>\n<td>670<\/td>\n<td>813<\/td>\n<td>M42<\/td>\n<td>10<\/td>\n<td>63<\/td>\n<td>42<\/td>\n<td>20<\/td>\n<\/tr>\n<tr>\n<td>F100<\/td>\n<td>1,200<\/td>\n<td>870<\/td>\n<td>1,042<\/td>\n<td>M42<\/td>\n<td>10<\/td>\n<td>63<\/td>\n<td>42<\/td>\n<td>32<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Important:<\/strong> The table is a reference for preliminary selection. Confirm the dimension definitions against the applicable edition of ISO 5211 and the actuator manufacturer&#8217;s drawing before manufacturing or ordering. Drive dimensions and any additional interface requirements must also be verified.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"4_What_Do_the_ISO_5211_Dimensions_Mean\"><\/span>4. What Do the ISO 5211 Dimensions Mean?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Understanding the dimensional terminology helps engineers compare valve and actuator drawings.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"41_Mounting_Flange_Dimensions\"><\/span>4.1 Mounting Flange Dimensions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The mounting flange dimensions define the mechanical interface between the actuator and the valve.<\/p>\n<p>They include flange geometry, the relevant diameters, and the dimensions needed for proper attachment. Both components must have compatible mounting interfaces.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"42_Bolt_Pattern_and_Thread_Size\"><\/span>4.2 Bolt Pattern and Thread Size<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The bolt pattern determines the number and arrangement of the fasteners used to secure the actuator.<\/p>\n<p>The thread specification identifies the nominal thread size used at the interface. The mating components must have compatible threaded or clearance-hole arrangements and sufficient fastener engagement.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"43_Drive_Interface\"><\/span>4.3 Drive Interface<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The actuator must transfer rotational torque to the valve stem or drive shaft.<\/p>\n<p>Depending on the design, the drive may use a key, square drive, or another permitted configuration. The drive dimensions must match the valve stem or adapter.<\/p>\n<p>An actuator with a matching mounting flange may still be incompatible if its drive geometry does not fit the valve.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"44_Mounting_Height_and_Clearance\"><\/span>4.4 Mounting Height and Clearance<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The overall assembly must provide sufficient clearance between the valve, actuator, pipeline, and surrounding equipment.<\/p>\n<p>Engineers should check the valve mounting height, stem extension, actuator envelope, adapter dimensions, and access required for installation and maintenance.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5_How_to_Select_the_Correct_ISO_5211_Mounting_Flange\"><\/span>5. How to Select the Correct ISO 5211 Mounting Flange<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Selecting an actuator mounting flange involves more than comparing two flange designations.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_1_Identify_the_Valve_Type\"><\/span>Step 1: Identify the Valve Type<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Determine whether the valve is a butterfly valve, ball valve, plug valve, or another part-turn valve.<\/p>\n<p>Different valve designs have different torque characteristics, stem geometries, and mounting arrangements.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_2_Confirm_the_Valve_Mounting_Interface\"><\/span>Step 2: Confirm the Valve Mounting Interface<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Obtain the valve manufacturer&#8217;s general arrangement drawing or mounting-interface drawing.<\/p>\n<p>Confirm the flange type, bolt pattern, drive dimensions, and mounting height. Do not assume the interface based on the valve size alone.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_3_Calculate_or_Obtain_the_Required_Torque\"><\/span>Step 3: Calculate or Obtain the Required Torque<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The actuator must provide sufficient torque throughout the operating cycle.<\/p>\n<p>For valve selection, consider:<\/p>\n<ul data-spread=\"false\">\n<li>Breakaway torque<\/li>\n<li>Running torque<\/li>\n<li>Seating and unseating torque<\/li>\n<li>Differential pressure<\/li>\n<li>Fluid and temperature conditions<\/li>\n<li>Seat material and valve design<\/li>\n<li>Required safety margin<\/li>\n<\/ul>\n<p>Use the valve manufacturer&#8217;s torque data and the actuator manufacturer&#8217;s sizing recommendations.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_4_Select_a_Compatible_Actuator\"><\/span>Step 4: Select a Compatible Actuator<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Choose a pneumatic or electric actuator with a compatible ISO 5211 interface and a suitable drive arrangement.<\/p>\n<p>Check the actuator&#8217;s output torque at the actual supply pressure or operating voltage, as applicable. For pneumatic actuators, verify torque across the relevant stroke and pressure range.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_5_Verify_the_Complete_Assembly\"><\/span>Step 5: Verify the Complete Assembly<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Before ordering, confirm the following:<\/p>\n<ul data-spread=\"false\">\n<li>ISO 5211 flange type<\/li>\n<li>Mounting dimensions<\/li>\n<li>Bolt quantity and thread<\/li>\n<li>Drive shape and dimensions<\/li>\n<li>Required torque<\/li>\n<li>Mounting height<\/li>\n<li>Actuator operating conditions<\/li>\n<li>Valve opening and closing direction<\/li>\n<li>Position indication and control requirements<\/li>\n<\/ul>\n<p>This verification helps prevent installation problems and actuator under-sizing.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"6_ISO_5211_for_Butterfly_Valves\"><\/span>6. ISO 5211 for Butterfly Valves<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Butterfly valves are widely used in water treatment, chemical processing, power generation, marine systems, and industrial pipelines.<\/p>\n<p>When a butterfly valve is automated, the actuator must connect securely to the valve stem and deliver the torque needed to rotate the disc.<\/p>\n<p>An ISO 5211 mounting interface can make it easier to integrate pneumatic or electric actuators with compatible butterfly valves.<\/p>\n<p>Typical benefits include:<\/p>\n<ul data-spread=\"false\">\n<li>Standardized actuator mounting<\/li>\n<li>Easier automation upgrades<\/li>\n<li>Reduced need for custom mounting adapters<\/li>\n<li>More convenient maintenance and replacement<\/li>\n<li>Improved compatibility across suitable valve and actuator assemblies<\/li>\n<\/ul>\n<p>The final selection must still account for valve torque, disc and seat design, operating pressure, temperature, and the intended control function.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"7_ISO_5211_for_Ball_Valves\"><\/span>7. ISO 5211 for Ball Valves<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ball valves commonly use quarter-turn operation, making them suitable for pneumatic and electric actuation.<\/p>\n<p>For an automated ball valve, the mounting interface and stem drive must transmit the torque required to rotate the ball and overcome seat friction and process-related loads.<\/p>\n<p>When selecting an actuator for a ball valve, check:<\/p>\n<ol start=\"1\" data-spread=\"false\">\n<li>Valve torque data from the manufacturer.<\/li>\n<li>ISO 5211 flange designation.<\/li>\n<li>Stem and drive dimensions.<\/li>\n<li>Actuator output torque.<\/li>\n<li>Fail-open, fail-closed, or double-acting requirements.<\/li>\n<li>Operating temperature and environmental conditions.<\/li>\n<\/ol>\n<p>A correctly selected mounting interface helps create a reliable mechanical connection, but torque sizing remains essential.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"8_Common_Problems_When_Matching_ISO_5211_Flanges\"><\/span>8. Common Problems When Matching ISO 5211 Flanges<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Problem_1_The_Flange_Fits_but_the_Drive_Does_Not\"><\/span>Problem 1: The Flange Fits but the Drive Does Not<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Two components may have compatible bolt patterns but incompatible drive shapes or dimensions.<\/p>\n<p><strong>Solution:<\/strong> Compare the complete valve and actuator interface drawings before assembly.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Problem_2_The_Actuator_Torque_Is_Insufficient\"><\/span>Problem 2: The Actuator Torque Is Insufficient<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A correctly mounted actuator may still fail to operate the valve if its output torque is too low.<\/p>\n<p><strong>Solution:<\/strong> Use the valve manufacturer&#8217;s torque data and size the actuator for the actual operating conditions.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Problem_3_Incorrect_Fasteners\"><\/span>Problem 3: Incorrect Fasteners<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Incorrect thread sizes, bolt lengths, or engagement can compromise the mounting connection.<\/p>\n<p><strong>Solution:<\/strong> Follow the component drawings and manufacturer&#8217;s installation instructions.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Problem_4_Confusing_Flange_Type_With_Valve_Size\"><\/span>Problem 4: Confusing Flange Type With Valve Size<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>F05, F07, and other designations describe mounting interfaces, not DN or NPS valve sizes.<\/p>\n<p><strong>Solution:<\/strong> Select the interface based on the valve and actuator drawings, not on the nominal pipeline size alone.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Problem_5_Ignoring_Environmental_Conditions\"><\/span>Problem 5: Ignoring Environmental Conditions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Outdoor, marine, and corrosive environments may require suitable actuator enclosures, coatings, fasteners, and protection ratings.<\/p>\n<p><strong>Solution:<\/strong> Specify the operating environment and required protection when selecting the actuator package.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"9_Frequently_Asked_Questions_About_ISO_5211\"><\/span>9. Frequently Asked Questions About ISO 5211<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"What_is_ISO_5211_used_for\"><\/span>What is ISO 5211 used for?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>ISO 5211 defines mounting interfaces for part-turn actuators used with industrial valves. It helps standardize the mechanical connection between a valve and its actuator.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_does_F05_mean_in_ISO_5211\"><\/span>What does F05 mean in ISO 5211?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>F05 is a standardized actuator mounting flange designation. Its dimensional requirements are defined by the applicable edition of ISO 5211. It does not directly indicate the valve&#8217;s nominal diameter or the actuator&#8217;s torque output.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Are_all_ISO_5211_actuators_interchangeable\"><\/span>Are all ISO 5211 actuators interchangeable?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Matching flange types alone is not sufficient. The drive dimensions, bolt pattern, mounting geometry, required torque, and actuator operating characteristics must also be compatible.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_ISO_5211_be_used_for_pneumatic_and_electric_actuators\"><\/span>Can ISO 5211 be used for pneumatic and electric actuators?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes.<a href=\"https:\/\/cncontrolvalve.com\/iso-5211-mounted-flange-dimensions\/\"> ISO 5211<\/a> mounting interfaces are commonly used for suitable pneumatic and electric part-turn actuators, as well as compatible manual gearboxes.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_ISO_5211_specify_actuator_torque\"><\/span>Does ISO 5211 specify actuator torque?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The standard includes interface-related requirements and torque-related provisions, but the required actuator output torque for a particular valve must be determined from the valve operating requirements and actuator performance data.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_can_I_confirm_an_actuator_is_compatible_with_my_valve\"><\/span>How can I confirm an actuator is compatible with my valve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Request the valve and actuator mounting drawings. Compare the flange type, mounting dimensions, bolt arrangement, drive interface, and required operating torque before placing the order.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"10_Conclusion\"><\/span>10. Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>ISO 5211 mounting flange dimensions are an important part of selecting and integrating part-turn actuators with industrial valves. Standardized interfaces can simplify assembly, automation, and replacement, but successful installation depends on checking the complete mechanical connection.<\/p>\n<p>Before ordering an actuator, confirm the flange designation, bolt pattern, drive dimensions, mounting height, and required torque with the valve and actuator manufacturers.<\/p>\n<p>For industrial valve projects, careful interface verification helps reduce installation issues and supports reliable operation over the equipment&#8217;s service life.<\/p>\n<p><strong>Need help selecting a valve with an ISO 5211 actuator mounting interface? Contact OUDIAN VALVE to discuss butterfly valves, ball valves, actuator compatibility, and customized industrial valve solutions.<\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction When selecting a pneumatic actuator, electric actuator, or gearbox for an industrial valve, the mounting interface is an important consideration. The actuator must fit the valve mounting flange correctly and transmit sufficient torque to operate the valve safely and reliably. ISO 5211 is an international standard for part-turn actuator attachments used on industrial valves. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[822,827,826,823,824,821,825],"class_list":["post-18734","post","type-post","status-publish","format-standard","hentry","category-industry-news","tag-actuator-mounting-flange","tag-butterfly-valve-actuator-connection","tag-electric-actuator-mounting","tag-iso-5211-f05","tag-iso-5211-f07","tag-iso-5211-flange-chart","tag-pneumatic-actuator-mounting"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/posts\/18734","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/comments?post=18734"}],"version-history":[{"count":1,"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/posts\/18734\/revisions"}],"predecessor-version":[{"id":18735,"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/posts\/18734\/revisions\/18735"}],"wp:attachment":[{"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/media?parent=18734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/categories?post=18734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oudianvalve.com\/it\/wp-json\/wp\/v2\/tags?post=18734"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}