{"id":4462,"date":"2026-09-17T09:27:37","date_gmt":"2026-09-17T01:27:37","guid":{"rendered":"https:\/\/www.pansvalve.com\/?p=4462"},"modified":"2026-09-24T09:28:54","modified_gmt":"2026-09-24T01:28:54","slug":"pneumatic-butterfly-valve-guide","status":"publish","type":"post","link":"https:\/\/www.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/","title":{"rendered":"Pneumatic Butterfly Valve: Working Principle, Types &amp; Selection"},"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\">\u00cdndice<\/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=\"Alternar \u00cdndice\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/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.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/#What_Is_a_Pneumatic_Butterfly_Valve\" >O que \u00e9 uma v\u00e1lvula borboleta pneum\u00e1tica?<\/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.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/#How_Does_a_Pneumatic_Butterfly_Valve_Work\" >How Does a Pneumatic Butterfly Valve Work?<\/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.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/#What_Are_the_Main_Types_and_Body_Configurations\" >What Are the Main Types and Body Configurations?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/#What_Specifications_Matter_Most\" >What Specifications Matter Most?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/#How_Do_You_Select_the_Right_Pneumatic_Butterfly_Valve\" >How Do You Select the Right Pneumatic Butterfly Valve?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/#Where_Are_Pneumatic_Butterfly_Valves_Used\" >Where Are Pneumatic Butterfly Valves Used?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/#How_Are_Pneumatic_Butterfly_Valves_Installed_and_Maintained\" >How Are Pneumatic Butterfly Valves Installed and Maintained?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.pansvalve.com\/pt\/blog\/butterfly-valve\/pneumatic-butterfly-valve-guide\/#Frequently_Asked_Questions\" >Perguntas frequentes<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Quarter-turn. Compressed air. 90-degree disc rotation. That is how a pneumatic butterfly valve controls flow. Fast, automated, compact. Key selection factors are actuator type, seat material, body configuration, pressure class, and whether fail-safe is required. PANS Valve manufactures high-performance butterfly valves to ISO 9001, CE, API, and TUV standards for oil and gas, chemical, water treatment, and power generation projects globally. 24-hour quotation. 20-day delivery.<\/p>\n\n\n\n<style>\n    \/* \u5bfc\u5165 Poppins \u5b57\u4f53 *\/\n    @import url('https:\/\/fonts.googleapis.com\/css2?family=Poppins:wght@400;600&display=swap');\n\n    \/* \u6837\u5f0f\u9694\u79bb\uff1a\u6240\u6709\u6837\u5f0f\u90fd\u4ee5 .cldg-card- \u5f00\u5934\uff0c\u907f\u514d\u5f71\u54cd\u7f51\u7ad9\u5176\u4ed6\u90e8\u5206 *\/\n    .cldg-card-container {\n        display: flex;\n        flex-wrap: wrap; \/* \u5728\u79fb\u52a8\u7aef\u6362\u884c *\/\n        width: 100%;\n        margin: 20px 0;\n        border: 1px solid #e0e0e0;\n        border-radius: 8px;\n        overflow: hidden; \/* \u786e\u4fdd\u5b50\u5143\u7d20\u7684\u5706\u89d2\u751f\u6548 *\/\n        background-color: #ffffff;\n        font-family: 'Poppins', Arial, sans-serif; \/* \u4f7f\u7528\u60a8\u6307\u5b9a\u7684 Poppins \u5b57\u4f53 *\/\n        box-sizing: border-box;\n    }\n\n    .cldg-card-text-column {\n        flex: 55%; 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\n        font-size: 16px;\n        font-weight: 600;\n        color: #d70c19; \/* \u6587\u672c\u989c\u8272\uff1a\u7ea2\u8272 *\/\n        background-color: #ffffff; \/* \u80cc\u666f\u989c\u8272\uff1a\u767d\u8272 *\/\n        border: 2px solid #d70c19; \/* \u8fb9\u6846\uff1a2\u50cf\u7d20\u7ea2\u8272\u5b9e\u7ebf *\/\n        border-radius: 5px;\n        text-decoration: none;\n        text-align: center;\n        transition: background-color 0.3s ease, color 0.3s ease;\n    }\n\n    .cldg-card-cta-button:hover {\n        background-color: #d70c19; \/* \u60ac\u505c\u65f6\u80cc\u666f\uff1a\u7ea2\u8272 *\/\n        color: #ffffff; \/* \u60ac\u505c\u65f6\u6587\u672c\uff1a\u767d\u8272 *\/\n    }\n\n    \/* \u54cd\u5e94\u5f0f\u8bbe\u8ba1\uff1a\u5728\u5bbd\u5ea6\u5c0f\u4e8e768px\u7684\u8bbe\u5907\u4e0a *\/\n    @media (max-width: 768px) {\n        .cldg-card-container {\n            flex-direction: column; \/* \u5782\u76f4\u5806\u53e0 *\/\n        }\n\n        .cldg-card-text-column,\n        .cldg-card-image-column {\n            flex: 100%; \/* \u6bcf\u680f\u90fd\u5360\u636e\u5168\u90e8\u5bbd\u5ea6 *\/\n        }\n        .cldg-card-text-column {\n            padding: 25px; \/* \u8c03\u6574\u5185\u8fb9\u8ddd *\/\n        }\n    }\n<\/style>\n\n<div class=\"cldg-card-container\">\n    <div class=\"cldg-card-text-column\">\n        <p class=\"cldg-card-title\">Descubra a v\u00e1lvula borboleta de alto desempenho da PANS.<\/p>\n       \n        <a href=\"https:\/\/www.pansvalve.com\/pt\/products\/full-metal-seated-bi-directional-butterfly-valve\/\" class=\"cldg-card-cta-button\" target=\"_blank\" rel=\"noopener noreferrer\">\n            Ver especifica\u00e7\u00f5es\n        <\/a>\n    <\/div>\n    <div class=\"cldg-card-image-column\">\n        <img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/www.pansvalve.com\/wp-content\/uploads\/2024\/09\/Full-Metal-Seated-Bi-Directional-Butterfly-Valve.png\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Sua f\u00e1brica de v\u00e1lvulas de esfera munh\u00e3o de entrada superior direta\"><noscript><img decoding=\"async\" src=\"https:\/\/www.pansvalve.com\/wp-content\/uploads\/2024\/09\/Full-Metal-Seated-Bi-Directional-Butterfly-Valve.png\" alt=\"Sua f\u00e1brica de v\u00e1lvulas de esfera munh\u00e3o de entrada superior direta\"><\/noscript>\n    <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_a_Pneumatic_Butterfly_Valve\"><\/span>O que \u00e9 uma v\u00e1lvula borboleta pneum\u00e1tica?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Disc inside a pipe bore. Rotate it 90 degrees and you control flow. Align the disc with the flow path and the valve is fully open. Rotate it perpendicular and it is fully closed. That is the core of how a <a href=\"https:\/\/www.pansvalve.com\/pt\/blog\/butterfly-valve\/how-does-pneumatic-butterfly-valve-work\/\" data-type=\"link\" data-id=\"https:\/\/www.pansvalve.com\/blog\/butterfly-valve\/how-does-pneumatic-butterfly-valve-work\/\" target=\"_blank\" rel=\"noreferrer noopener\">pneumatic butterfly valve<\/a> works. Simple geometry. Fast operation. Minimal pressure drop compared to gate or <a href=\"https:\/\/www.pansvalve.com\/pt\/products\/cast-globe-valve\/\" data-type=\"link\" data-id=\"https:\/\/www.pansvalve.com\/products\/cast-globe-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">v\u00e1lvulas globo<\/a> of the same size.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two components make it function. The valve body holds the disc, stem, seat, and bearings. The pneumatic butterfly valve actuator converts compressed air into the rotary motion that drives the disc. Add a solenoid valve, a limit switch box, and a positioner and you have a complete automated flow control assembly integrated into your process system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_a_Pneumatic_Butterfly_Valve_Work\"><\/span>How Does a Pneumatic Butterfly Valve Work?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Compressed air enters the actuator and pushes on internal pistons. That linear piston movement gets converted into 90-degree rotary motion. Two mechanisms do this conversion.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rack and pinion is the industry standard for smaller sizes. Piston movement turns a central gear. Compact. Cost-effective. Works well up to around 6 inches. Scotch yoke uses a sliding yoke instead. Generates higher torque at the start and end of the stroke. Better choice for larger valves or applications with high friction from powder, slurry, or viscous media. The pneumatic actuator butterfly valve mechanism you choose affects the torque output, cycle life, and how the valve behaves under difficult operating conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_the_Main_Types_and_Body_Configurations\"><\/span>What Are the Main Types and Body Configurations?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Double-acting or spring-return. That is the first decision for any pneumatically actuated butterfly valve specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Double-acting needs air to open and air to close. If the air supply fails, the valve stays where it is. Last position hold. Spring-return uses air in one direction and springs for the return. If air fails, springs drive the valve to a predetermined safe position. Fail-safe closed or fail-safe open depending on how the springs are configured. For hazardous chemical lines or critical process applications, spring-return is typically the required fail-safe specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Body connection type is the second decision. Wafer fits between flanges using through-bolts. Compact. Space-efficient. Lug has threaded inserts in the body, allowing dead-end service without a downstream flange. Flanged bolts directly to mating flanges. More rigid. Better suited to higher-pressure service.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Specifications_Matter_Most\"><\/span>What Specifications Matter Most?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Seat material first. Everything else follows from that.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EPDM for water, weak acids, glycols. Never use EPDM with oil. It absorbs oil and swells, crushing the disc against the seat. PTFE for strong acids, solvents, and corrosive chemicals. Metal seats for anything above 150\u00b0C or for abrasive media where soft seats degrade fast. Getting this wrong is the most common cause of premature valve failure in service.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Size range for pneumatically actuated butterfly valves runs from around 2 inches to 48 inches and beyond depending on design. Pressure class depends on body material and disc geometry. Standard resilient-seated designs handle lower pressures. <a href=\"https:\/\/www.pansvalve.com\/pt\/products\/three-eccentric-metal-hard-seal-butterfly-valve\/\" data-type=\"link\" data-id=\"https:\/\/www.pansvalve.com\/products\/three-eccentric-metal-hard-seal-butterfly-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">Triple-offset<\/a> metal-seated designs handle high-pressure, high-temperature, and zero-leakage critical service conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Do_You_Select_the_Right_Pneumatic_Butterfly_Valve\"><\/span>How Do You Select the Right Pneumatic Butterfly Valve?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Five questions. Answer all five before specifying anything.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the media?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Water and air take EPDM. Acids and solvents take PTFE. Steam and high-temperature service take metal seats.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the temperature?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Determines whether soft seating is even viable.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the pressure class?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Determines disc and body material requirements.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the cycle rate?&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">High-cycle applications need actuator sizing at 30% above calculated breakaway torque, not running torque.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is fail-safe required?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes means spring-return. No means double-acting is acceptable.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_Are_Pneumatic_Butterfly_Valves_Used\"><\/span>Where Are Pneumatic Butterfly Valves Used?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HVAC and ventilation systems. Large duct airflow regulation where fast response and low pressure drop matter. Water and wastewater treatment. Large-diameter pipeline flow management where gate valves would be too heavy and too slow. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In Chemical processing, PTFE-seated and metal-seated designs for corrosive media isolation. Power generation cooling water systems. Large-diameter pneumatic actuator butterfly valve designs for rapid flow control across high-volume circuits. Oil and gas pipelines. High-performance double-offset and triple-offset designs where tight shutoff and durability under frequent cycling are the primary requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Are_Pneumatic_Butterfly_Valves_Installed_and_Maintained\"><\/span>How Are Pneumatic Butterfly Valves Installed and Maintained?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" data-src=\"https:\/\/www.pansvalve.com\/wp-content\/uploads\/2026\/09\/image2-1024x576.webp\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Step-by-step guide on pneumatic butterfly valve installation and maintenance\" class=\"wp-image-4465 lazyload\"\/><noscript><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.pansvalve.com\/wp-content\/uploads\/2026\/09\/image2-1024x576.webp\" alt=\"Step-by-step guide on pneumatic butterfly valve installation and maintenance\" class=\"wp-image-4465\" srcset=\"https:\/\/www.pansvalve.com\/wp-content\/uploads\/2026\/09\/image2-1024x576.webp 1024w, https:\/\/www.pansvalve.com\/wp-content\/uploads\/2026\/09\/image2-300x169.webp 300w, https:\/\/www.pansvalve.com\/wp-content\/uploads\/2026\/09\/image2-768x432.webp 768w, https:\/\/www.pansvalve.com\/wp-content\/uploads\/2026\/09\/image2-1536x864.webp 1536w, https:\/\/www.pansvalve.com\/wp-content\/uploads\/2026\/09\/image2-18x10.webp 18w, https:\/\/www.pansvalve.com\/wp-content\/uploads\/2026\/09\/image2.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Install upright where possible. Confirm the flow direction arrow on the valve body matches pipeline flow before bolting flanges. For <a href=\"https:\/\/www.pansvalve.com\/pt\/products\/wafer-type-check-valve\/\" data-type=\"link\" data-id=\"https:\/\/www.pansvalve.com\/products\/wafer-type-check-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">wafer-type bodies<\/a>, verify the disc has full clearance before closing the flanges around it. One scratch on the seat from a misaligned flange creates a leak path that no amount of torque will fix.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Maintenance is straightforward but needs to happen on schedule. Lubricate bearings and stem interfaces every two months on high-cycle applications. Inspect seat condition for swelling or surface degradation. Swelling signals chemical incompatibility and accelerates failure fast if not caught early. Check the solenoid exhaust silencer for dirt blockage. A blocked silencer is the most common cause of slow actuator response in the field. Valve stuck after long idle? The seat has likely bonded to the disc. Manual cycling breaks the static friction before restoring air pressure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For high-performance butterfly valve supply across demanding service conditions, <a href=\"https:\/\/www.pansvalve.com\/pt\/contact-us\/\">contact PANS Valve<\/a> for a 24-hour quotation. PANS Valve double-offset and triple-offset designs cover high-pressure, high-temperature, and critical service applications where standard resilient-seated designs fall short.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Perguntas frequentes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">What is a pneumatic butterfly valve?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A quarter-turn automated valve that uses compressed air to rotate a disc 90 degrees inside a pipe bore. Combines a butterfly valve body with a pneumatic actuator for fast, reliable automated isolation or flow regulation across industrial pipeline systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What are the three main types of butterfly valves?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Concentric resilient-seated for general low-pressure water and HVAC service. Double-offset high-performance for tighter shutoff at moderate pressure and temperature. Triple-offset metal-seated for high-temperature, high-pressure, and zero-leakage critical service applications requiring maximum durability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the working principle of a pneumatic butterfly valve?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Compressed air acts on pistons inside the actuator. Piston movement is converted to 90-degree rotary motion through rack and pinion or scotch yoke mechanism. This rotates the disc between fully open and fully closed positions to control pipeline flow.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What are the disadvantages of a pneumatic butterfly valve?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not suited for precise throttling at very high pressure drops. Resilient seats have temperature and chemical compatibility limits. Requires a clean, dry compressed air supply. Spring-return actuators add cost but are necessary for fail-safe operation in hazardous or critical service applications.<\/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-red-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.pansvalve.com\/pt\/contact-us\/\">Obtenha uma cota\u00e7\u00e3o<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Quarter-turn. Compressed air. 90-degree disc rotation. That is how a pneumatic butterfly valve controls flow. Fast, automated, compact. Key selection factors are actuator type, seat material, body configuration, pressure class, and whether fail-safe is required. PANS Valve manufactures high-performance butterfly valves to ISO 9001, CE, API, and TUV standards for oil and gas, chemical, water [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4464,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[190],"tags":[],"class_list":["post-4462","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-butterfly-valve"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pneumatic Butterfly Valve: Working Principle, Types &amp; Selection for Industrial Flow Control<\/title>\n<meta name=\"description\" content=\"Pneumatic butterfly valve uses compressed air for 90\u00b0 quarter-turn flow control. 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