{"id":72830,"date":"2026-10-05T10:53:26","date_gmt":"2026-10-05T07:53:26","guid":{"rendered":"https:\/\/unox.com.tr\/pneumatic-actuator-selection-torque-operating-principle\/"},"modified":"2026-10-05T12:51:27","modified_gmt":"2026-10-05T09:51:27","slug":"pneumatic-actuator-selection-torque-operating-principle","status":"publish","type":"post","link":"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/","title":{"rendered":"How to Choose a Pneumatic Actuator? A Guide to Torque and Operating Pressure"},"content":{"rendered":"\n<p class=\"wp-block-wd-paragraph wd-a4ea3c6f\">Pneumatic actuators, which are used to automatically open and close industrial valves, play an important role especially in applications where fast and reliable valve control is required. Widely used with quarter-turn valves such as ball, butterfly, and plug valves, the correct selection of pneumatic actuators is crucial for ensuring safe and efficient system operation. <\/p>\n\n<p class=\"wp-block-wd-paragraph wd-c32a2851\">An incorrectly selected actuator may fail to move the valve with sufficient force or may be oversized, increasing costs unnecessarily. Therefore, when selecting an actuator, it is not enough to consider only the valve diameter; valve torque, operating air pressure, <a href=\"https:\/\/unox.com.tr\/en\/actuators\/\" data-type=\"link\" data-id=\"https:\/\/unox.com.tr\/aktuator\/\">actuator <\/a>type, <a href=\"https:\/\/unox.com.tr\/en\/valve-group\/\" data-type=\"link\" data-id=\"https:\/\/unox.com.tr\/vana\/\">valve <\/a>connection, and operating conditions must all be evaluated together. <\/p>\n\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\">Sayfa \u0130\u00e7eri\u011fi<\/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-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#What_is_Pneumatic_Actuator\" >What is Pneumatic Actuator?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#The_Most_Important_Criterion_in_Pneumatic_Actuator_Selection_Torque\" >The Most Important Criterion in Pneumatic Actuator Selection: Torque<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#Why_Is_Operating_Air_Pressure_Important\" >Why Is Operating Air Pressure Important?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#Single-Acting_or_Double-Acting\" >Single-Acting or Double-Acting?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#The_Actuator_and_Valve_Must_Be_Compatible\" >The Actuator and Valve Must Be Compatible<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#Actuator_Selection_Based_on_Valve_Type\" >Actuator Selection Based on Valve Type<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#Operating_Temperature_and_Environmental_Conditions\" >Operating Temperature and Environmental Conditions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#Key_Factors_to_Check_When_Selecting_an_Actuator\" >Key Factors to Check When Selecting an Actuator<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#Common_Mistakes_in_Pneumatic_Actuator_Selection\" >Common Mistakes in Pneumatic Actuator Selection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#How_to_Select_the_Right_Pneumatic_Actuator\" >How to Select the Right Pneumatic Actuator?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuator-selection-torque-operating-principle\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-wd-title title wd-53170789\"><span class=\"ez-toc-section\" id=\"What_is_Pneumatic_Actuator\"><\/span>What is Pneumatic Actuator?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-d23eda6b\"><a href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuators\/\" data-type=\"link\" data-id=\"https:\/\/unox.com.tr\/en\/pneumatic-actuators\/\">A pneumatic actuator<\/a> is an automation device that converts the energy of compressed air into mechanical motion, enabling the connected valve to open or close.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-4b61f49d\">They are particularly used with valves such as<a href=\"https:\/\/unox.com.tr\/en\/ball-valves\/\" data-type=\"link\" data-id=\"https:\/\/unox.com.tr\/kuresel-vana\/\"> ball valves<\/a> and <a href=\"https:\/\/unox.com.tr\/en\/butterfly-valves\/\" data-type=\"link\" data-id=\"https:\/\/unox.com.tr\/kelebek-vana\/\">butterfly valves<\/a> that operate with a 90\u00b0 rotary motion. <a href=\"https:\/\/unox.com.tr\/en\/pneumatic-actuators\/\" data-type=\"link\" data-id=\"https:\/\/unox.com.tr\/en\/pneumatic-actuators\/\">Pneumatic actuators<\/a> are preferred for their advantages, including fast opening and closing, easy integration into automation systems, and reliable operation in demanding industrial environments.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-3a2a324e\">When the actuator suitable for the system is selected, the valve can be controlled with the required force and speed.<\/p>\n\n<div class=\"wp-block-wd-gallery wd-grid-g wd-caption-mask wd-f093c5f8\" style=\"--wd-col-lg:4;--wd-col-md:4;--wd-col-sm:1;--wd-gap-lg:20px;--wd-gap-sm: 10px;\">\n<div class=\"wp-block-wd-gallery-item wd-col wd-e3db91f1\"><div class=\"wd-block-image\"><img decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-65866\" src=\"https:\/\/unox.com.tr\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-1.webp\" alt=\"Exproof Pn&#xF6;matik Akt&#xFC;at&#xF6;r\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-1.webp 1000w, https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-1-300x300.webp 300w, https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-1-150x150.webp 150w, https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-1-768x768.webp 768w, https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-1-600x600.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/div><\/div>\n\n\n\n<div class=\"wp-block-wd-gallery-item wd-col wd-a23c876a\"><div class=\"wd-block-image\"><img decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-65873\" src=\"https:\/\/unox.com.tr\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-2.webp\" alt=\"\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-2.webp 1000w, https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-2-300x300.webp 300w, https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-2-150x150.webp 150w, https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-2-768x768.webp 768w, https:\/\/unox.com.tr\/wp-content\/uploads\/2025\/05\/exproof-pnomatik-aktuator-2-600x600.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/div><\/div>\n\n\n\n<div class=\"wp-block-wd-gallery-item wd-col wd-404bce59\"><div class=\"wd-block-image\"><img decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-57073\" src=\"https:\/\/unox.com.tr\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-flansli-kuresel-vana.jpg\" alt=\"Pn&#xF6;matik akt&#xFC;at&#xF6;r aksesuar sistemleri end&#xFC;striyel otomasyonun vazge&#xE7;ilmez bile&#x15F;enleri aras&#x131;nda yer al&#x131;r. Bu aksesuarlar sayesinde akt&#xFC;at&#xF6;rler daha verimli,\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-flansli-kuresel-vana.jpg 1000w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-flansli-kuresel-vana-300x300.jpg 300w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-flansli-kuresel-vana-150x150.jpg 150w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-flansli-kuresel-vana-600x600.jpg 600w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-flansli-kuresel-vana-768x768.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/div><\/div>\n\n\n\n<div class=\"wp-block-wd-gallery-item wd-col wd-b6734555\"><div class=\"wd-block-image\"><img decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-57023\" src=\"https:\/\/unox.com.tr\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-disli-kuresel-vana-1.jpg\" alt=\"akt&#xFC;at&#xF6;rl&#xFC; k&#xFC;resel vana\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-disli-kuresel-vana-1.jpg 1000w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-disli-kuresel-vana-1-300x300.jpg 300w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-disli-kuresel-vana-1-150x150.jpg 150w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-disli-kuresel-vana-1-600x600.jpg 600w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/pnomatik-aktuatorlu-3-parcali-disli-kuresel-vana-1-768x768.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/div><\/div>\n\n\n\n<div class=\"wp-block-wd-gallery-item wd-col wd-e0b03fad\"><div class=\"wd-block-image\"><img decoding=\"async\" width=\"600\" height=\"600\" class=\"wp-image-29521\" src=\"https:\/\/unox.com.tr\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2.jpg\" alt=\"\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2.jpg 600w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2-300x300.jpg 300w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2-150x150.jpg 150w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2-400x400.jpg 400w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2-560x560.jpg 560w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2-367x367.jpg 367w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2-85x85.jpg 85w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-2-2-32x32.jpg 32w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/div><\/div>\n\n\n\n<div class=\"wp-block-wd-gallery-item wd-col wd-aac56efa\"><div class=\"wd-block-image\"><img decoding=\"async\" width=\"600\" height=\"600\" class=\"wp-image-29511\" src=\"https:\/\/unox.com.tr\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2.jpg\" alt=\"\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2.jpg 600w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-300x300.jpg 300w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-150x150.jpg 150w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-400x400.jpg 400w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-560x560.jpg 560w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-367x367.jpg 367w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-85x85.jpg 85w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-32x32.jpg 32w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/div><\/div>\n\n\n\n<div class=\"wp-block-wd-gallery-item wd-col wd-fbeb982d\"><div class=\"wd-block-image\"><img decoding=\"async\" width=\"600\" height=\"600\" class=\"wp-image-8786\" src=\"https:\/\/unox.com.tr\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2.jpg\" alt=\"So&#x11F;uk Ortam Pn&#xF6;matik Akt&#xFC;at&#xF6;r\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2.jpg 600w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-300x300.jpg 300w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-150x150.jpg 150w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-400x400.jpg 400w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-560x560.jpg 560w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-367x367.jpg 367w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-85x85.jpg 85w, https:\/\/unox.com.tr\/wp-content\/uploads\/2020\/09\/UDA-1-2-32x32.jpg 32w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/div><\/div>\n<\/div>\n\n<h3 class=\"wp-block-wd-title title wd-67662a73\"><span class=\"ez-toc-section\" id=\"The_Most_Important_Criterion_in_Pneumatic_Actuator_Selection_Torque\"><\/span>The Most Important Criterion in Pneumatic Actuator Selection: Torque<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-32fb550b\">One of the most important values to consider when selecting a pneumatic actuator is torque.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-2da6a7a3\">Torque is the rotational force generated by the actuator to move the valve and is expressed in Nm (Newton metres).<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-482fbccb\"><math><semantics><mrow><mi>\u03c4<\/mi><mo>=<\/mo><mi>r<\/mi><mi>F<\/mi><mi>sin<\/mi><mo>\u2061<\/mo><mo stretchy=\"false\">(<\/mo><mi>\u03b8<\/mi><mo stretchy=\"false\">)<\/mo><\/mrow><annotation encoding=\"application\/x-tex\">\\tau = rF\\sin(\\theta)<\/annotation><\/semantics><\/math><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-e448dba2\"><math><semantics><mrow><mi>\u03c4<\/mi><mo>=<\/mo><mo stretchy=\"false\">(<\/mo><mtext>3<\/mtext><mo stretchy=\"false\">)<\/mo><mo stretchy=\"false\">(<\/mo><mtext>6<\/mtext><mo stretchy=\"false\">)<\/mo><mi>sin<\/mi><mo>\u2061<\/mo><mo stretchy=\"false\">(<\/mo><msup><mtext>90<\/mtext><mo lspace=\"0em\" rspace=\"0em\">\u2218<\/mo><\/msup><mo stretchy=\"false\">)<\/mo><mo>=<\/mo><mtext>18<\/mtext><mtext>\u2009<\/mtext><mtext>N m<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">\\tau=(\\text{3})(\\text{6})\\sin(\\text{90}^{\\circ})=\\text{18}\\,\\text{N m}<\/annotation><\/semantics><\/math>\u03c4=(3)(6)sin(90\u2218)=18N m<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-ce59d3a5\">Only the perpendicular component of F causes the lever to rotate.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-141907b5\"><math><semantics><mrow><mi>F<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">F<\/annotation><\/semantics><\/math>F<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-38041fdb\">N<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-7ff82ea7\"><math><semantics><mrow><mi>F<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">F<\/annotation><\/semantics><\/math>F<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-57712ed3\"><math><semantics><mrow><mi>r<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">r<\/annotation><\/semantics><\/math>r<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-be82b483\">m<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-e8b10343\"><math><semantics><mrow><mi>r<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">r<\/annotation><\/semantics><\/math>r<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-1bc8bb9e\"><math><semantics><mrow><mi>\u03b8<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\theta<\/annotation><\/semantics><\/math>\u03b8<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-7f6e3cb8\">\u00b0<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-1df0359c\"><math><semantics><mrow><mi>\u03b8<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\theta<\/annotation><\/semantics><\/math>\u03b8d\u00f6nme noktas\u0131r = 3 m\u03b8 = 90\u00b0F\u22a5 = 6 NF\u03c4 = 18 N m<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-ab83448b\">Give Feedback<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-5915bcfe\">The torque required to open and close a valve can vary depending on the valve type, size, operating pressure, fluid, and friction conditions inside the valve.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-cab6472e\">Therefore, it is not correct to select an actuator simply by saying, \u201cThis actuator is used for a DN50 valve.\u201d Two different valves with the same DN size may require different torque values. <\/p>\n\n<p class=\"wp-block-wd-paragraph wd-39489cd5\"><strong>The Correct Approach:<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-b66ffb87\"><strong>Required valve torque \u2192 Safety margin \u2192 Actuator output torque<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-b503ae8e\">This should be evaluated accordingly.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-459cdbf2\">The actuator\u2019s output torque must be sufficiently higher than the torque required by the valve. The torque values and operating pressure tables provided in the manufacturer\u2019s catalogs should be used as the primary reference at this point. <\/p>\n\n<h3 class=\"wp-block-wd-title title wd-b41ab8ed\"><span class=\"ez-toc-section\" id=\"Why_Is_Operating_Air_Pressure_Important\"><\/span>Why Is Operating Air Pressure Important?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-0832ff32\">The torque generated by a pneumatic actuator is directly affected by the operating air pressure used.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-c1aab043\">For example, the torque value of an <a href=\"https:\/\/www.unoxonline.com.tr\/urun-kategori\/aktuator\/\" data-type=\"link\" data-id=\"https:\/\/www.unoxonline.com.tr\/urun-kategori\/aktuator\/\" rel=\"nofollow noopener\" target=\"_blank\">actuator <\/a>at a specific air pressure may differ from its torque value at a lower pressure. Therefore, when selecting an actuator, the pressure and torque values provided in the actuator catalog should be evaluated together. <\/p>\n\n<p class=\"wp-block-wd-paragraph wd-f4d327d6\">It is not correct to select an actuator based solely on its model without knowing the available air pressure at the facility.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-4aaf4e0a\">The following information should be determined before selecting an actuator:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Minimum operating air pressure<\/li>\n\n\n\n<li>Normal operating air pressure<\/li>\n\n\n\n<li>Maximum operating air pressure<\/li>\n\n\n\n<li>Required opening and closing time<\/li>\n\n\n\n<li>Continuous operation or opening\/closing frequency<\/li>\n<\/ul>\n\n<p class=\"wp-block-wd-paragraph wd-24e351b3\">Especially if the facility\u2019s actual operating pressure differs from the reference pressure specified in the catalog, the actual torque provided by the actuator must be checked.<\/p>\n\n<h3 class=\"wp-block-wd-title title wd-9a6ca595\"><span class=\"ez-toc-section\" id=\"Single-Acting_or_Double-Acting\"><\/span>Single-Acting or Double-Acting?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-ead10daf\">Another important decision when selecting a pneumatic actuator is whether to choose a single-acting or double-acting actuator.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-30734446\">In double-acting pneumatic actuators, compressed air is used to open and close the valve. These types of actuators are widely used in standard automatic opening and closing applications. <\/p>\n\n<p class=\"wp-block-wd-paragraph wd-bd96d6b4\">Single-acting pneumatic actuators, on the other hand, feature a spring mechanism. When the air supply is interrupted, the actuator returns to its predefined fail-safe position using spring force. <\/p>\n\n<p class=\"wp-block-wd-paragraph wd-67a6b1a5\">Therefore, single-acting actuators may be considered for applications where it is critical for the valve to remain in a specific position in the event of a power or air supply failure.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-fdc34ec0\">The following question should be asked when making the selection:<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-6b58456d\"><strong>&#8220;What position should the valve be in when the air supply is interrupted?\u201d<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>If it needs to remain open \u2192 Normally Open (NO)<\/li>\n\n\n\n<li>If it needs to remain closed \u2192 Normally Closed (NC)<\/li>\n<\/ul>\n\n<p class=\"wp-block-wd-paragraph wd-eb1169d4\">This decision is particularly important in safety-critical processes.<\/p>\n\n<h3 class=\"wp-block-wd-title title wd-6b75d10e\"><span class=\"ez-toc-section\" id=\"The_Actuator_and_Valve_Must_Be_Compatible\"><\/span>The Actuator and Valve Must Be Compatible<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-a1bcbbad\">Selecting an actuator with the correct torque rating alone is not sufficient. There must also be mechanical compatibility between the actuator and the valve. <\/p>\n\n<p class=\"wp-block-wd-paragraph wd-7c1382f9\">Key points to check:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Valve stem size<\/li>\n\n\n\n<li>Actuator output connection<\/li>\n\n\n\n<li>Mounting flange<\/li>\n\n\n\n<li>Mounting holes<\/li>\n\n\n\n<li>Rotation angle<\/li>\n\n\n\n<li>Valve type<\/li>\n\n\n\n<li>Actuator mounting orientation<\/li>\n<\/ul>\n\n<p class=\"wp-block-wd-paragraph wd-2d6610c1\">For quarter-turn valve applications, the ISO 5211 connection standard is an important reference for actuator-to-valve mounting. However, rather than relying solely on the standard, the actual connection dimensions of the valve and actuator being used should also be checked. <\/p>\n\n<h3 class=\"wp-block-wd-title title wd-203dd949\"><span class=\"ez-toc-section\" id=\"Actuator_Selection_Based_on_Valve_Type\"><\/span>Actuator Selection Based on Valve Type<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-9bb1d24d\">Pneumatic actuators can be used with different types of valves. However, the valve\u2019s operating characteristics should be taken into account when selecting the actuator. <\/p>\n\n<p class=\"wp-block-wd-paragraph wd-f4ee2ad1\">Ball Valves:<br\/>Since they typically operate with a 90\u00b0 rotary motion, they can be easily automated using pneumatic rotary actuators.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-2d8fa667\">Butterfly Valves:<br\/>They can be used together with pneumatic actuators for automatic opening and closing applications in large-diameter pipelines.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-42f70f3d\">What matters here is not only the valve diameter, but also knowing the valve\u2019s actual operating torque.<\/p>\n\n<h3 class=\"wp-block-wd-title title wd-d5e57c49\"><span class=\"ez-toc-section\" id=\"Operating_Temperature_and_Environmental_Conditions\"><\/span>Operating Temperature and Environmental Conditions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-e36b951e\">The environment in which the actuator will be used is also one of the selection criteria.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-85f73a7a\">The actuator\u2019s:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Ambient temperature,<\/li>\n\n\n\n<li>Environmental effects caused by fluid temperature,<\/li>\n\n\n\n<li>Humidity<\/li>\n\n\n\n<li>dust<\/li>\n\n\n\n<li>Corrosive atmospheres,<\/li>\n\n\n\n<li>Explosive atmospheres,<\/li>\n<\/ul>\n\n<p class=\"wp-block-wd-paragraph wd-cb6f9c07\">must be suitable for.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-0f680ed2\">Especially for actuators intended for outdoor use or harsh industrial environments, the protection rating and material properties should be taken into consideration.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-b6588409\">In areas where there is a risk of explosion, the Ex\/ATEX compliance required for the application should also be evaluated.<\/p>\n\n<h3 class=\"wp-block-wd-title title wd-6eb2bfc5\"><span class=\"ez-toc-section\" id=\"Key_Factors_to_Check_When_Selecting_an_Actuator\"><\/span>Key Factors to Check When Selecting an Actuator<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-811f40e6\">Preparing the following information before ordering or selecting a pneumatic actuator will help speed up the process:<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Information<\/th><th>Example<\/th><\/tr><\/thead><tbody><tr><td>Valve type<\/td><td>Ball \/ Butterfly \/ Plug<\/td><\/tr><tr><td>Valve size<\/td><td>DN50<\/td><\/tr><tr><td>Required torque<\/td><td>80 Nm<\/td><\/tr><tr><td>Operating air pressure<\/td><td>6 bar<\/td><\/tr><tr><td>Actuator type<br\/><\/td><td>Single-Acting \/ Double-Acting<\/td><\/tr><tr><td>Rotation angle<\/td><td>90\u00b0<\/td><\/tr><tr><td>Valve connection<\/td><td>ISO 5211<\/td><\/tr><tr><td>Operating temperature<\/td><td>80 \u00b0C<\/td><\/tr><tr><td>Environment<\/td><td>Indoor, Outdoor environment<\/td><\/tr><tr><td>Control method<\/td><td>On-Off \/ Proportional<\/td><\/tr><tr><td>Power supply<\/td><td>24V DC \/ 230V AC<\/td><\/tr><tr><td>Safe position<\/td><td>NO \/ NC<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-wd-paragraph wd-02783bd7\">Once this information is available, selecting the correct actuator becomes much easier.<\/p>\n\n<h3 class=\"wp-block-wd-title title wd-47842e16\"><span class=\"ez-toc-section\" id=\"Common_Mistakes_in_Pneumatic_Actuator_Selection\"><\/span>Common Mistakes in Pneumatic Actuator Selection<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-40a78915\"><strong>1. Selecting an actuator based solely on the DN size<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-cdbe10b7\">The DN value indicates the valve size; it does not, by itself, determine the torque required by the actuator.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-b7e893bb\"><strong>2. Failing to take the air pressure into account<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-2f7eaa45\">Since the actuator\u2019s torque capacity depends on the operating pressure, the actual air pressure available at the facility must be checked.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-d678e5d1\"><strong>3. Failing to account for the safety margin<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-fd7bda0b\">Selecting an actuator with a torque rating too close to the valve torque can create a risk of insufficient performance during operation.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-c27bb850\"><strong>4. Failing to select single-acting or double-acting based on the application<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-5415801c\">The valve\u2019s required behavior in the event of air or power failure must be determined in advance.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-1b7594ea\"><strong>5. Failing to check the mechanical connection<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-103ad2ee\">Even if the torque rating is suitable, installation may not be possible if the valve stem and actuator connection are not compatible.<\/p>\n\n<h3 class=\"wp-block-wd-title title wd-3a5dc13c\"><span class=\"ez-toc-section\" id=\"How_to_Select_the_Right_Pneumatic_Actuator\"><\/span>How to Select the Right Pneumatic Actuator?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-9f57ef30\">The following steps can be followed to select the right actuator:<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-ada63c7a\"><strong>1.Determine the valve type.<br\/>Identify whether it is a ball, butterfly, or plug valve.<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-83e70ef9\"><strong>2. Determine the valve torque.<\/strong><br\/>Check the operating torque specified by the manufacturer.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-c029d1eb\"><strong>3. Evaluate the safety margin.<br\/>Make sure that the actuator\u2019s output torque safely meets the valve\u2019s torque requirements.<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-99ed4968\"><strong>4. Determine the operating air pressure.<br\/>Check the actual air pressure that can be supplied to the actuator at the facility.<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-0b20b568\"><strong>5. Select a single-acting or double-acting actuator.<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-058b296d\"><strong>6. Check the valve and actuator connection.<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-98cd1d55\"><strong>7. Evaluate the operating environment.<br\/>Consider temperature, humidity, corrosion, and, if applicable, explosive atmosphere conditions.<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-d7a4eacc\"><strong>8.Determine the control equipment.<br\/>Depending on the application requirements, equipment such as a solenoid valve, limit switch box, or positioner can be included in the system.<\/strong><\/p>\n\n<h3 class=\"wp-block-wd-title title wd-52e98163\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-wd-paragraph wd-953827be\">When selecting a pneumatic actuator, considering only the valve size is not sufficient to determine the right product. <strong>The valve\u2019s required torque, operating air pressure, actuator type, mechanical connection, and operating conditions should all be evaluated together.<\/strong><\/p>\n\n<p class=\"wp-block-wd-paragraph wd-07f465a7\">A properly selected pneumatic actuator ensures reliable valve opening and closing while also contributing to the efficient operation of the automation system.<\/p>\n\n<p class=\"wp-block-wd-paragraph wd-f59c28d0\"><strong>Explore pneumatic actuator and valve automation solutions suitable for your application with <a href=\"https:\/\/www.unoxonline.com.tr\/\" data-type=\"link\" data-id=\"https:\/\/www.unoxonline.com.tr\/\" rel=\"nofollow noopener\" target=\"_blank\">UNOX Online<\/a>, and select the right product based on the criteria that best match your technical requirements.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Information Example Valve type Ball \/ Butterfly \/ Plug Valve size DN50 Required torque 80 Nm Operating air pressure 6<\/p>\n","protected":false},"author":1,"featured_media":65882,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1715],"tags":[],"class_list":["post-72830","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unox-blog"],"_links":{"self":[{"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/posts\/72830","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/comments?post=72830"}],"version-history":[{"count":1,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/posts\/72830\/revisions"}],"predecessor-version":[{"id":72832,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/posts\/72830\/revisions\/72832"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/media\/65882"}],"wp:attachment":[{"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/media?parent=72830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/categories?post=72830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/tags?post=72830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}