{"id":2901,"date":"2026-10-01T07:22:34","date_gmt":"2026-10-01T07:22:34","guid":{"rendered":"https:\/\/www.cybernetik.com\/blog\/?p=2901"},"modified":"2026-10-01T07:34:05","modified_gmt":"2026-10-01T07:34:05","slug":"pneumatic-butterfly-valves-working-principle-in","status":"publish","type":"post","link":"https:\/\/www.cybernetik.com\/blog\/process\/pneumatic-butterfly-valves-working-principle-in\/","title":{"rendered":"Pneumatic Butterfly Valves: Working Principle and Industrial Applications"},"content":{"rendered":"\n<div class=\"wp-block-group has-white-color has-text-color has-background has-link-color wp-elements-390f465547bcbe31bef682e7c47e7f54 is-layout-constrained wp-container-core-group-is-layout-800b4e77 wp-block-group-is-layout-constrained\" style=\"border-top-left-radius:5px;border-top-right-radius:5px;border-bottom-left-radius:5px;border-bottom-right-radius:5px;background-color:#12263a;margin-bottom:20px;padding-top:10px;padding-right:30px;padding-bottom:30px;padding-left:30px\">\n<h2 class=\"wp-block-heading has-white-color has-text-color has-link-color wp-elements-19215f1e6a1396f83f0257af42631315\" style=\"line-height:1.4\">Key takeaways<\/h2>\n\n\n\n<div style=\"height:6px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_267939-91:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_267939-91 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_267939-91 ul.kt-svg-icon-list{grid-row-gap:35px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_267939-91 .kb-svg-icon-wrap{font-size:10px;color:#ef8e27;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_267939-91 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:10px;}.kt-svg-icon-list-items2901_267939-91 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items2901_267939-91 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{line-height:1.2em;}.kt-svg-icon-list-items2901_267939-91 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items2901_267939-91 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-2901_a1b535-17 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_a1b535-17\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Pneumatic butterfly valves use compressed air for fast quarter-turn operation: The actuator converts piston movement into shaft rotation, while a solenoid valve controls the air supply based on the plant control system.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_83130c-7b .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_83130c-7b\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Actuator selection depends on torque requirements: Rack-and-pinion actuators provide compact, relatively constant torque, while scotch-yoke actuators provide higher torque at the start and end of the stroke, making them suitable for larger valves.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_bfdb7d-21 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_bfdb7d-21\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Double-acting and spring-return designs serve different safety needs: Double-acting actuators use air for both directions, while spring-return actuators move to a defined fail-open or fail-closed position when air is lost.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_a31b6b-0a .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_a31b6b-0a\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Reliable operation depends on correct sizing and air quality: Actuator sizing should account for minimum available air pressure, valve torque, pressure differential, media conditions, and spring requirements, while clean and dry air protects internal components.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_20bd5c-95 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_20bd5c-95\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Pneumatic butterfly valves are mainly isolation valves in powder handling: They are widely used on silos, hoppers, conveying lines, dust collection, water, HVAC, and processing systems, but rotary or metering valves are better when controlled powder flow is required.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_cdeeb2-0f .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_cdeeb2-0f\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Cybernetik provides pneumatic and automated powder-handling valve solutions: Its CT and combo valves support customizable 1,000\u20136,000 kg\/hr capacities, SS304\/SS316 contact parts, GMP construction, vacuum-compatible sealing, and optional ATEX protection.<\/span><\/li>\n<\/ul><\/div>\n<\/div>\n\n\n\n<p class=\"has-link-color wp-elements-04a27b15f46bfceeab186f95fecc4f94 wp-block-paragraph\">Walk through almost any process plant and you will find pneumatic butterfly valves everywhere: on silo outlets, dust collection ducts, water lines, conveying systems and the tops of hoppers. They are quick, simple, affordable and robust, and in a plant that already has compressed air they are often the default choice for any valve that opens and closes on command.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That popularity hides a fair amount of engineering. Choosing the actuator type, sizing it against the valve, arranging the control package and keeping the air supply in good shape all decide whether a valve works reliably for years or becomes a recurring maintenance job.<\/p>\n\n\n\n<p class=\"has-link-color wp-elements-4aaed3476e969e5229782bb107be4af3 wp-block-paragraph\">This article focuses on the pneumatic side: how the actuators work, the choices involved and where these valves fit best. The valve body itself, and how seat designs differ, is covered in the guide to <a href=\"https:\/\/www.cybernetik.com\/blog\/process\/motorised-butterfly-valves-selection-guide-in\/\">motorised butterfly valves<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The Basic Idea<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A butterfly valve closes a pipe with a disc that rotates a quarter turn on a central shaft. Turned edge-on to the flow, the disc lets material pass; turned across the pipe, it shuts it off. That quarter-turn motion is what makes butterfly valves easy to automate, because it needs only a short, simple movement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A pneumatic actuator provides that movement using compressed air. Air pushes a piston, the actuator converts the piston\u2019s straight-line motion into rotation, and the valve shaft turns. A small solenoid valve, switched by the plant control system, decides when air goes in and where it goes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How Pneumatic Actuators Turn the Shaft<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Two mechanisms dominate, and the difference between them matters more than it first appears.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><\/th><th><strong>Rack and pinion<\/strong><\/th><th><strong>Scotch yoke<\/strong><\/th><\/tr><\/thead><tbody><tr><td>How it turns the shaft<\/td><td>Pistons drive toothed racks that rotate a pinion gear on the output shaft<\/td><td>A piston drives a slotted yoke that swings the output shaft through its quarter turn<\/td><\/tr><tr><td>Torque across the stroke<\/td><td>Roughly constant from start to finish<\/td><td>Highest at the start and end of the stroke, lower in the middle<\/td><\/tr><tr><td>Match to a butterfly valve<\/td><td>Good for small and medium valves<\/td><td>Very good, since butterfly valves need most torque to unseat and to seat<\/td><\/tr><tr><td>Size and weight<\/td><td>Compact<\/td><td>Larger and heavier<\/td><\/tr><tr><td>Typical use<\/td><td>The most common choice for general service<\/td><td>Larger valves and higher torque duties<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-link-color wp-elements-24a6df2bb5c74812fd2260bf05a9652a wp-block-paragraph\">The torque profile row is the interesting one. A butterfly valve does not need the same torque throughout its stroke. It needs the most at the very start, to break the disc free from the seat, and again at the very end, to press it back into the seat and seal. In between, it needs much less. A scotch yoke delivers high torque at exactly those two points, which is why it suits larger butterfly valves so well. A rack and pinion delivers steady torque throughout, which is simpler and entirely adequate for most smaller valves.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1393\" height=\"867\" src=\"https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/09\/Motorised-Butterfly-Valves-Applications-and-Selection-Guide.webp\" alt=\"\" class=\"wp-image-2878\" style=\"border-top-left-radius:5px;border-top-right-radius:5px;border-bottom-left-radius:5px;border-bottom-right-radius:5px\" srcset=\"https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/09\/Motorised-Butterfly-Valves-Applications-and-Selection-Guide.webp 1393w, https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/09\/Motorised-Butterfly-Valves-Applications-and-Selection-Guide-300x187.webp 300w, https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/09\/Motorised-Butterfly-Valves-Applications-and-Selection-Guide-1024x637.webp 1024w, https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/09\/Motorised-Butterfly-Valves-Applications-and-Selection-Guide-768x478.webp 768w\" sizes=\"(max-width: 1393px) 100vw, 1393px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Double-Acting or Spring-Return<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is the most important choice in a pneumatic valve specification, because it decides what happens when something goes wrong.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><\/th><th><strong>Double-acting<\/strong><\/th><th><strong>Spring-return<\/strong><\/th><\/tr><\/thead><tbody><tr><td>How it moves<\/td><td>Air drives it both open and closed<\/td><td>Air drives it one way, springs drive it back<\/td><\/tr><tr><td>On loss of air<\/td><td>Stays roughly where it was<\/td><td>Springs drive it to a set safe position<\/td><\/tr><tr><td>Actuator size<\/td><td>Smaller for the same torque<\/td><td>Larger, because air has to overcome the springs as well as the valve<\/td><\/tr><tr><td>Solenoid type<\/td><td>Usually a 5\/2 valve<\/td><td>Usually a 3\/2 valve<\/td><\/tr><tr><td>Best suited to<\/td><td>Duties where holding position on air loss is acceptable<\/td><td>Duties that need a guaranteed fail-open or fail-closed position<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Spring-return actuators give pneumatic valves one of their biggest advantages over electric ones: a built-in safe position. If the air supply fails or the solenoid loses power, the springs drive the valve fully open or fully closed, whichever the process needs. A steam supply valve might be set to fail closed; a cooling water valve to fail open.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Double-acting actuators are smaller and cheaper for the same torque, and they suit duties where the valve simply holding its last position on air loss is acceptable. The choice should follow a clear view of what the process needs if air disappears, rather than whichever actuator happens to be cheaper.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The Control Package<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The actuator is only part of a working valve. A small group of accessories turns it into something the control system can operate and trust.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Solenoid valve<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The solenoid valve switches air to the actuator on a signal from the control system. Double-acting actuators usually use a 5\/2 solenoid valve, which directs air to one side while venting the other. Spring-return actuators usually use a 3\/2 valve, which either supplies air or vents it and lets the springs work. Many actuators have a standard mounting face so the solenoid can bolt directly on without extra tubing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Limit switch box<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A limit switch box sits on top of the actuator and tells the control system whether the valve is actually open or closed. That matters, because a valve commanded to close is not necessarily a valve that has closed. A stuck disc, a failed solenoid or a pressure drop can all leave the valve short of its intended position, and the next step in a sequence should not proceed until the valve confirms it got there.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Positioner<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Most pneumatic butterfly valves simply open and close. Where a valve has to hold intermediate positions for throttling, a positioner is added. An electro-pneumatic positioner takes a control signal and adjusts the air to the actuator until the valve sits at the requested position, correcting as conditions change.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Speed control<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Small flow control valves on the solenoid exhaust ports set how quickly the actuator moves. That sounds like a detail and can prevent real problems, covered below.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Sizing the Actuator<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Actuator sizing is a torque calculation, and two points trip people up.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">First, the torque available from a pneumatic actuator depends on the air pressure it receives. Plant supply pressure varies, dipping when demand elsewhere is high. An actuator sized against normal pressure can stall on a day when pressure drops, which is often exactly when several valves are moving at once. Size against the minimum pressure the valve can realistically see, not the nominal figure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Second, spring-return actuators have two different torque outputs. Air has to overcome the springs as well as the valve when it opens, and the springs alone have to seat the valve when it closes. Both the air stroke and the spring stroke need enough torque for the valve, with a sensible margin. Valve torque also rises with the pressure difference across the disc and with sticky or abrasive media packing around the seat, so those conditions belong in the calculation too.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-7387b849 wp-block-group-is-layout-flex\">\n<p class=\"has-text-align-left wp-block-paragraph\" style=\"font-size:29px\"><img decoding=\"async\" class=\"wp-image-503\" style=\"width: 65px\" src=\"https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/05\/Frame-1.svg\" alt=\"\"><strong>&#8220;A pneumatic butterfly valve performs reliably only when clean, dry air, correct torque sizing, accurate feedback, and proper control are engineered as one system.&#8221;<\/strong><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-luminous-vivid-amber-color has-text-color has-link-color has-medium-font-size wp-elements-3cc671b03a440f3700a6ec32f9fcb913 is-horizontal is-content-justification-left is-nowrap is-layout-flex wp-container-core-group-is-layout-e8523bbf wp-block-group-is-layout-flex\" style=\"text-decoration:none\">\n<div class=\"wp-block-group is-content-justification-left is-layout-constrained wp-container-core-group-is-layout-d9c85f36 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-image alignwide size-thumbnail\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0\"><img decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/05\/minus-2-150x150.png\" alt=\"\" class=\"wp-image-898\" srcset=\"https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/05\/minus-2-150x150.png 150w, https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/05\/minus-2-300x300.webp 300w, https:\/\/www.cybernetik.com\/blog\/wp-content\/uploads\/2026\/05\/minus-2.webp 512w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/process.cybernetik.com\/\" data-type=\"link\" data-id=\"https:\/\/process.cybernetik.com\/\">Cybernetik process automation team<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\" style=\"font-size:34px\">See it in action<\/h2>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Motorized and Pneumatic Combo Valve | Cybernetik Product Catalogue\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/XI5j4Ufe-40?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Air Quality Matters More Than It Seems<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A pneumatic valve is only as reliable as the air feeding it, and air quality is one of the most common hidden causes of trouble.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_6130e6-e8:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_6130e6-e8 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_6130e6-e8 ul.kt-svg-icon-list{grid-row-gap:35px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_6130e6-e8 .kb-svg-icon-wrap{font-size:10px;color:#ef8e27;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_6130e6-e8 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:10px;}.kt-svg-icon-list-items2901_6130e6-e8 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items2901_6130e6-e8 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{line-height:1.2em;}.kt-svg-icon-list-items2901_6130e6-e8 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items2901_6130e6-e8 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-2901_d15023-22 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_d15023-22\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Moisture <\/strong>corrodes actuator internals and, in cold conditions, can freeze in small passages and stop a valve moving.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_e7e59a-50 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_e7e59a-50\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Dirt and rust particles <\/strong>from pipework wear seals and can block the small ports in solenoids and positioners.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_59494e-51 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_59494e-51\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Oil from compressors <\/strong>can degrade some seal materials and cause sticking over time.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_cba738-73 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_cba738-73\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Low or unstable pressure <\/strong>reduces available torque and makes valve timing inconsistent.<\/span><\/li>\n<\/ul><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Clean, dry, properly regulated air, with filtration close to the valves that need it, prevents most of these problems. It is far cheaper than chasing intermittent valve faults that turn out to be water in the air lines.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Closing Speed and Its Consequences<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pneumatic actuators are fast, often moving a valve in under a second. Usually that is exactly what is wanted. Sometimes it is a problem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In liquid lines, slamming a valve shut stops a moving column of liquid almost instantly, and the resulting pressure spike, known as water hammer, can damage pipework, joints and instruments. In powder systems, a valve snapping shut under a moving stream can cause shock loads and compact material against the disc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Slowing the actuator with exhaust flow controls solves this simply. Taking an extra second or two to close costs little and removes a surprising amount of stress from the system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pneumatic or Electric?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The two approaches suit different situations, and the deciding factor is often simply what the plant already has.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pneumatic actuators are fast, inexpensive, tolerant of frequent cycling and able to fail safe with springs. They need a clean, dry compressed air supply. Electric actuators need only a power supply, position precisely without extra hardware and hold position on power loss, but they are slower and cost more per valve. A plant with good compressed air will usually find pneumatic the practical choice for on-off duty. A valve far from any air supply, or a plant without one, often favors electric.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pneumatic Butterfly Valves in Powder Handling<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Powder plants use pneumatic butterfly valves heavily, mostly as isolation valves. They close silo and hopper outlets, isolate sections of pneumatic conveying lines, and seal the connections on containers during docking and transfer. Compressed air is usually already present for conveying and dust collection, and fast, reliable open-close action fits sequencing well.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What they are not good at is controlling how much powder flows. Partly closing a butterfly valve on a cohesive powder encourages it to bridge across the smaller opening and stop, and the disc gives material a ledge to build on.<\/p>\n\n\n\n<p class=\"has-link-color wp-elements-7ff76caf4d2286e2de0a1b6c2df5f938 wp-block-paragraph\">Where a measured flow rate is needed, a rotary or metering valve does the job properly. That difference between isolating and metering is set out in the guide to <a href=\"https:\/\/www.cybernetik.com\/blog\/process\/flow-control-valves-types-working-principle-in\/\" data-type=\"link\" data-id=\"https:\/\/www.cybernetik.com\/blog\/process\/flow-control-valves-types-working-principle-in\/\">flow control valves<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Where Else They Are Used<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_75e8e6-e4:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_75e8e6-e4 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_75e8e6-e4 ul.kt-svg-icon-list{grid-row-gap:35px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_75e8e6-e4 .kb-svg-icon-wrap{font-size:10px;color:#ef8e27;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_75e8e6-e4 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:10px;}.kt-svg-icon-list-items2901_75e8e6-e4 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items2901_75e8e6-e4 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{line-height:1.2em;}.kt-svg-icon-list-items2901_75e8e6-e4 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items2901_75e8e6-e4 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-2901_cd08eb-37 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_cd08eb-37\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Dust collection systems, <\/strong>where large duct diameters make butterfly valves the economic choice for isolating branches.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_2e2fe2-52 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_2e2fe2-52\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Water and utility lines, <\/strong>for fast, reliable isolation on large pipes.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_4b2175-b7 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_4b2175-b7\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Food and beverage processing, <\/strong>with hygienic butterfly valves on liquid transfer lines.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_a7e664-f3 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_a7e664-f3\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>HVAC and air handling, <\/strong>as dampers controlling air flow.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_fbf046-17 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_fbf046-17\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Chemical processing, <\/strong>with seat and disc materials chosen for the media handled.<\/span><\/li>\n<\/ul><\/div>\n\n\n\n<p class=\"has-link-color wp-elements-f603ee7e6947930f091c5244841d980b wp-block-paragraph\">How butterfly valves fit alongside ball, gate, globe and other valve types is covered in the article on <a href=\"https:\/\/www.cybernetik.com\/blog\/process\/industrial-valves-types-working-principle-in\/\">industrial valves<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Keeping Them Running<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pneumatic butterfly valves are low-maintenance, and a few habits keep them that way. Drain moisture from air lines and check filters regularly. Watch for slow or incomplete valve movement, which often points to low pressure, a sticking solenoid or a worn seat rather than a failed actuator. Check that limit switches still read correctly, since a switch that has drifted can report a valve as closed when it is not. And replace seats before they wear to the point of leaking, since the seat is the main wear part in most butterfly valves.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Powder Valves from Cybernetik<\/strong><\/h2>\n\n\n\n<p class=\"has-link-color wp-elements-b4e6a1cd2172bb2c71c2f6bf3b325202 wp-block-paragraph\">Cybernetik builds valves for powder and bulk solids handling as part of complete process lines, with actuation chosen for the duty. The <a href=\"https:\/\/process.cybernetik.com\/products\/ct-valve.html\">CT valve<\/a> can be supplied with pneumatic operation turning its rotor 90 or 180 degrees, and the <a href=\"https:\/\/process.cybernetik.com\/products\/combo-valve.html\">combo valve<\/a> uses separate actuators for coarse and fine flow, with pneumatic or electro-pneumatic options.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Cybernetik powder valves<\/strong><\/th><th><strong>Specification<\/strong><\/th><\/tr><\/thead><tbody><tr><td>CT valve capacity<\/td><td>1,000 to 6,000 kg\/hr, customizable<\/td><\/tr><tr><td>CT valve actuation<\/td><td>Electric drive, with optional pneumatic operation turning the rotor 90 or 180 degrees<\/td><\/tr><tr><td>CT valve sealing<\/td><td>Zero leakage and vacuum compatible<\/td><\/tr><tr><td>Combo valve capacity<\/td><td>1,000 to 6,000 kg\/hr, customizable<\/td><\/tr><tr><td>Combo valve actuation<\/td><td>Separate actuators for coarse and fine flow, optional pneumatic or electro-pneumatic<\/td><\/tr><tr><td>Inlet and outlet<\/td><td>100 to 300 NB<\/td><\/tr><tr><td>Construction<\/td><td>SS304 or SS316 contact parts, GMP built<\/td><\/tr><tr><td>Hazardous area<\/td><td>Explosion-resistant ATEX construction available<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Those valves handle the metering side of powder flow, where a butterfly valve would struggle, while pneumatic actuation gives the fast sequencing that batching and transfer need. For butterfly valve isolation on a specific line, it is worth discussing the details with Cybernetik\u2019s engineers directly.<\/p>\n\n\n\n<p class=\"has-link-color wp-elements-69660521fc7b3d5a3d80045550f1feb7 wp-block-paragraph\">Cybernetik has been building automation for more than three decades. It is headquartered in Pune with facilities in Gujarat and Raigad and offices in the United States and UAE, and has installed over 6,000 systems in more than 30 countries, including over 400 custom automation solutions. More background is on the <a href=\"https:\/\/process.cybernetik.com\/about.html\">Cybernetik about page<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Why manufacturers choose Cybernetik<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_3e0a16-b2:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_3e0a16-b2 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_3e0a16-b2 ul.kt-svg-icon-list{grid-row-gap:35px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_3e0a16-b2 .kb-svg-icon-wrap{font-size:10px;color:#ef8e27;}.wp-block-kadence-iconlist.kt-svg-icon-list-items2901_3e0a16-b2 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:10px;}.kt-svg-icon-list-items2901_3e0a16-b2 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items2901_3e0a16-b2 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{line-height:1.2em;}.kt-svg-icon-list-items2901_3e0a16-b2 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items2901_3e0a16-b2 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-2901_1ecaad-51 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_1ecaad-51\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Actuation matched to the job. <\/strong>Pneumatic, electric or electro-pneumatic, chosen for speed, control and fail-safe needs.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_16de05-8a .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_16de05-8a\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Metering where it matters. <\/strong>CT and combo valves for controlled powder flow from 1,000 to 6,000 kg\/hr.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_93e3e8-40 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_93e3e8-40\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Tight sealing. <\/strong>Zero leakage, vacuum-compatible CT valve design.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_d2d8ad-27 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_d2d8ad-27\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Safe for combustible dusts. <\/strong>Explosion-resistant ATEX construction available.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_766c4d-fb .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_766c4d-fb\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Hygienic build. <\/strong>SS304 or SS316 contact parts, GMP built.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-2901_26e7c4-a5 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-2901_26e7c4-a5\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_circle kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\"><strong>Part of the line. <\/strong>Valves specified alongside the silos, conveying and packing they serve.<\/span><\/li>\n<\/ul><\/div>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group has-white-color has-text-color has-background has-link-color wp-elements-ac152bf2f15fc4c7252137b9076b5ae4 is-content-justification-space-between is-layout-flex wp-container-core-group-is-layout-bcf883e7 wp-block-group-is-layout-flex\" style=\"border-top-left-radius:5px;border-top-right-radius:5px;border-bottom-left-radius:5px;border-bottom-right-radius:5px;background-color:#12263a;margin-bottom:20px;padding-top:20px;padding-right:30px;padding-bottom:30px;padding-left:30px\">\n<h3 class=\"wp-block-heading has-white-color has-text-color has-link-color wp-elements-f22099acdeda5e510eedec4b07580a36 wp-container-content-29dca9c1\" style=\"font-size:34px;font-style:normal;font-weight:400;line-height:1.4\">Want to know more about our solution?<\/h3>\n\n\n\n<div class=\"wp-block-buttons wp-container-content-69bc4bdf is-content-justification-right is-layout-flex wp-container-core-buttons-is-layout-88867f99 wp-block-buttons-is-layout-flex\" style=\"border-style:none;border-width:0px;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-left-radius:0px;border-bottom-right-radius:0px;margin-top:0;margin-bottom:0;padding-top:6;padding-right:6;padding-bottom:6;padding-left:6\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 is-style-fill\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color has-text-align-right wp-element-button\" href=\"https:\/\/meetings-eu1.hubspot.com\/anand-gaikar\" style=\"background-color:#ee8d26;padding-top:10px;padding-right:20px;padding-bottom:10px;padding-left:20px\">Book a call<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\"><strong>Frequently asked questions<\/strong><\/h2>\n\n\n<style>.kt-accordion-id2901_eab875-af .kt-accordion-inner-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:14px;}.kt-accordion-id2901_eab875-af .kt-accordion-panel-inner{border-top:0px solid transparent;border-right:0px solid transparent;border-bottom:0px solid transparent;border-left:0px solid transparent;background:#ffffff;padding-top:var(--global-kb-spacing-md, 2rem);padding-right:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:0px;padding-left:var(--global-kb-spacing-sm, 1.5rem);}.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:0px solid #949494;border-right:0px solid #949494;border-bottom:1px solid #abb8c3;border-left:0px solid #949494;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;background:#ffffff;font-size:var(--global-kb-font-size-md, 1.25rem);line-height:1.5em;letter-spacing:-0.1px;font-weight:400;text-transform:capitalize;color:#12263a;padding-top:14px;padding-right:10px;padding-bottom:16px;padding-left:16px;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap .kt-blocks-accordion-icon-trigger:before{background:#12263a;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger{background:#12263a;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:before{background:#ffffff;}.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id2901_eab875-af .kt-blocks-accordion-header:focus-visible{color:#12263a;background:#ffffff;border-top-color:#474747;border-top-style:solid;border-right-color:#474747;border-right-style:solid;border-bottom-color:#474747;border-bottom-style:solid;border-left-color:#474747;border-left-style:solid;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion--visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#ff6900;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger, body:not(.hide-focus-outline) .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger{background:#ff6900;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#ffffff;}.kt-accordion-id2901_eab875-af .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{color:#12263a;background:#ffffff;border-top-color:#abb8c3;border-top-style:solid;border-right-color:#abb8c3;border-right-style:solid;border-bottom-color:#abb8c3;border-bottom-style:solid;border-left-color:#abb8c3;border-left-style:solid;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:#ff6900;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger{background:#ff6900;}.kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id2901_eab875-af:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:#ffffff;}@media all and (max-width: 1024px){.kt-accordion-id2901_eab875-af .kt-accordion-panel-inner{border-top:0px solid transparent;border-right:0px solid transparent;border-bottom:0px solid transparent;border-left:0px solid transparent;}}@media all and (max-width: 1024px){.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:0px solid #949494;border-right:0px solid #949494;border-bottom:1px solid #abb8c3;border-left:0px solid #949494;}}@media all and (max-width: 1024px){.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id2901_eab875-af .kt-blocks-accordion-header:focus-visible{border-top-color:#474747;border-top-style:solid;border-right-color:#474747;border-right-style:solid;border-bottom-color:#474747;border-bottom-style:solid;border-left-color:#474747;border-left-style:solid;}}@media all and (max-width: 1024px){.kt-accordion-id2901_eab875-af .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top-color:#abb8c3;border-top-style:solid;border-right-color:#abb8c3;border-right-style:solid;border-bottom-color:#abb8c3;border-bottom-style:solid;border-left-color:#abb8c3;border-left-style:solid;}}@media all and (max-width: 767px){.kt-accordion-id2901_eab875-af .kt-accordion-inner-wrap{display:block;}.kt-accordion-id2901_eab875-af .kt-accordion-inner-wrap .kt-accordion-pane:not(:first-child){margin-top:14px;}.kt-accordion-id2901_eab875-af .kt-accordion-panel-inner{border-top:0px solid transparent;border-right:0px solid transparent;border-bottom:0px solid transparent;border-left:0px solid transparent;}.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:0px solid #949494;border-right:0px solid #949494;border-bottom:1px solid #abb8c3;border-left:0px solid #949494;}.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id2901_eab875-af .kt-blocks-accordion-header:focus-visible{border-top-color:#474747;border-top-style:solid;border-right-color:#474747;border-right-style:solid;border-bottom-color:#474747;border-bottom-style:solid;border-left-color:#474747;border-left-style:solid;}.kt-accordion-id2901_eab875-af .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id2901_eab875-af > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top-color:#abb8c3;border-top-style:solid;border-right-color:#abb8c3;border-right-style:solid;border-bottom-color:#abb8c3;border-bottom-style:solid;border-left-color:#abb8c3;border-left-style:solid;}}<\/style>\n<div class=\"wp-block-kadence-accordion alignnone\"><div class=\"kt-accordion-wrap kt-accordion-id2901_eab875-af kt-accordion-has-19-panes kt-active-pane-0 kt-accordion-block kt-pane-header-alignment-left kt-accodion-icon-style-none kt-accodion-icon-side-right\" style=\"max-width:none\"><div class=\"kt-accordion-inner-wrap\" data-allow-multiple-open=\"false\" data-start-open=\"0\">\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-1 kt-pane2901_f7cff9-89\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">How does a pneumatic butterfly valve work?<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">Compressed air pushes a piston inside the actuator, and the actuator converts that straight-line motion into a quarter turn of the valve shaft. The disc rotates from edge-on, where material flows, to across the pipe, where it shuts off. A solenoid valve switched by the control system decides when and where air is supplied.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-2 kt-pane2901_3944dc-8d\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">What is the difference between double-acting and spring-return actuators?<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">A double-acting actuator uses air to both open and close the valve, and holds roughly its last position if air is lost. A spring-return actuator uses air in one direction and springs in the other, so on air loss the springs drive the valve to a set safe position, either fully open or fully closed.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-3 kt-pane2901_569ab8-e4\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">Rack and pinion or scotch yoke, which is better?<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">It depends on the valve. Rack and pinion actuators are compact and give roughly constant torque, which suits most small and medium valves. Scotch yoke actuators give their highest torque at the start and end of the stroke, matching how butterfly valves need most torque to unseat and to seat, which makes them well suited to larger valves.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-11 kt-pane2901_06ff9a-3e\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">Why does air quality affect pneumatic valves?<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">Moisture corrodes internals and can freeze in cold weather, dirt wears seals and blocks small solenoid and positioner ports, compressor oil can degrade some seals, and low or unstable pressure reduces available torque. Clean, dry, well-regulated air with filtration near the valves prevents most intermittent valve faults.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-18 kt-pane2901_5646e4-2c\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">Can a pneumatic butterfly valve control powder flow?<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">Not reliably. Partly closing the disc narrows the opening, which encourages cohesive powder to bridge across it and stop, and the disc gives material a ledge to build on. In powder handling, butterfly valves work best as isolation valves, with rotary or metering valves used where a controlled flow rate is needed.<\/p>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\n<p class=\"has-white-color has-text-color has-link-color wp-elements-c645e628e62f8fbab9d9726851472d16 wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Walk through almost any process plant and you will find pneumatic butterfly valves everywhere: on silo outlets, dust collection ducts, water lines&#8230;<\/p>\n","protected":false},"author":4,"featured_media":2800,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[30],"class_list":["post-2901","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-process","tag-process"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin 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