{"id":339,"date":"2026-06-03T09:48:46","date_gmt":"2026-06-03T01:48:46","guid":{"rendered":",https:\/\/www.actuator-china.com\/?post_type=product&p=339"},"modified":"2026-06-03T09:48:47","modified_gmt":"2026-06-03T01:48:47","slug":"concentric-butterfly-valves-12","status":"publish","type":"product","link":"https:\/\/www.actuator-china.com\/pt\/products\/concentric-butterfly-valves-12\/","title":{"rendered":"Concentric Butterfly Valves"},"content":{"rendered":"
\n

General Introduction<\/h3>\n\n\n\n

First, concentric butterfly valves control pipeline cut-off and flow, and they serve oil, chemical, metallurgy and hydropower fields.<\/p>\n\n\n\n

Besides, their stem, disc and body share one center line to cut production cost and balance open-close torque.<\/p>\n\n\n\n

Meanwhile, the stem sits at the geometric center, and disc squeezes rubber rings to form seal via elastic deformation.<\/p>\n\n\n\n

Then, the disc spins 0\u00b0 to 90\u00b0 to adjust flow for regular valve versions.<\/p>\n\n\n\n

However, old seals fail against high heat and wear fast, so they only work under low pressure and normal temperature.<\/p>\n\n\n\n

Furthermore, upgraded units mix T-type soft rings and layered stainless steel sheets for better performance.<\/p>\n\n\n\n

Also, they weld high-temperature alloy on tapered seats to combine soft and metal hard sealing strengths.<\/p>\n\n\n\n

In addition, built-in springs fix tolerance gaps to fit high heat, high pressure and two-way fluid transport.<\/p>\n\n\n\n

Moreover, users split these valves into concentric or eccentric types with soft (EPDM, PTFE) or metal seals.<\/p>\n\n\n\n

Plus, buyers pick manual, electric or pneumatic drive modes for different on-site needs.<\/p>\n\n\n\n

Specifically, pneumatic types use compressed air with simple build, equal two-way seal and low flow resistance.<\/p>\n\n\n\n

Hence, these pneumatic valves see wide use under working pressure below 1.6 MPa.<\/p>\n\n\n\n

Additionally, installers align flanges centrally and cycle closed valves regularly to avoid sticking.<\/p>\n\n\n\n

Finally, updated designs cover large-size valves with custom test tools, and some meet API 609 rules.<\/p>\n\n\n\n

Structure & Working Principle<\/h3>\n\n\n\n

Firstly, concentric valves align stem, disc and body on one central point for easy making.<\/p>\n\n\n\n

For instance, rubber-lined butterfly valves belong to this common concentric group.<\/p>\n\n\n\n

Unfortunately, disc keeps rubbing seat to raise friction and speed up component abrasion.<\/p>\n\n\n\n

Next, core parts include valve body, disc, stem, seat and matched actuator.<\/p>\n\n\n\n

Normally, makers cast whole valve bodies and embed elastic rubber seals inside bodies.<\/p>\n\n\n\n

After that, the centered stem turns the disc 0-90 degrees to fully open or shut the valve.<\/p>\n\n\n\n

Also, streamlined disc shapes cut flowing resistance inside the whole pipeline path.<\/p>\n\n\n\n

Meanwhile, sleeve bushings inside body holes hold and lubricate the rotating valve stem.<\/p>\n\n\n\n

Whereas, rubber or PTFE seat materials limit usable temperature for ordinary butterfly valves.<\/p>\n\n\n\n

As a result, most users think regular butterfly valves cannot handle high working temperature.<\/p>\n\n\n\n

Once closing the valve, spinning disc presses rubber seats and forms seal through rubber flexibility.<\/p>\n\n\n\n

Namely, this sealing style counts as compression soft seal for daily working conditions.<\/p>\n\n\n\n

Take handwheel operation as an example; operators twist wheels clockwise or counter-clockwise.<\/p>\n\n\n\n

Then, the stem turns disc around 90 degrees to open or close valves with little physical effort.<\/p>\n\n\n\n

Application Range<\/h3>\n\n\n\n

Primarily, these valves carry clean water, sewage, fuel gas and other gases inside industrial pipes.<\/p>\n\n\n\n

Besides, they adjust or block fluid in water plants, power plants, steel mills, paper and food factories.<\/p>\n\n\n\n

Especially, pneumatic concentric valves feature symmetric I-shape with identical two-way sealing effect.<\/p>\n\n\n\n

Moreover, they bring low flow resistance and small switch torque for medium and low pressure scenes.<\/p>\n\n\n\n

Therefore, such pneumatic valves gain massive application under pressure below 1.6 MPa.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

General Introduction First, concentric butterfly valves control pipeline cut-off and flow, and they serve oil, chemical, metallurgy and hydropower fields. Besides, their stem, disc and body share one center line to cut production cost and balance open-close torque. Meanwhile, the stem sits at the geometric center, and disc squeezes rubber rings to form seal via […]<\/p>\n","protected":false},"featured_media":340,"template":"","meta":{"_acf_changed":false,"_uag_custom_page_level_css":""},"tags":[],"product_category":[22],"class_list":["post-339","product","type-product","status-publish","has-post-thumbnail","hentry","product_category-concentric-butterfly-valves"],"acf":{"photo_gallery":{"photogallery":[[{"id":340,"title":"Concentric-Butterfly-Valves12","caption":"","full_image_url":"https:\/\/www.actuator-china.com\/wp-content\/uploads\/2026\/06\/Concentric-Butterfly-Valves12.jpg","thumbnail_image_url":"https:\/\/www.actuator-china.com\/wp-content\/uploads\/2026\/06\/Concentric-Butterfly-Valves12-150x150.jpg","large_srcset":"https:\/\/www.actuator-china.com\/wp-content\/uploads\/2026\/06\/Concentric-Butterfly-Valves12.jpg 450w, https:\/\/www.actuator-china.com\/wp-content\/uploads\/2026\/06\/Concentric-Butterfly-Valves12-150x150.jpg 150w","medium_srcset":"https:\/\/www.actuator-china.com\/wp-content\/uploads\/2026\/06\/Concentric-Butterfly-Valves12.jpg 450w, https:\/\/www.actuator-china.com\/wp-content\/uploads\/2026\/06\/Concentric-Butterfly-Valves12-150x150.jpg 150w","media_details":{"width":450,"height":450,"sizes":{"thumbnail":{"file":"Concentric-Butterfly-Valves12-150x150.jpg","width":150,"height":150,"mime-type":"image\/jpeg","filesize":4765,"source_url":"https:\/\/www.actuator-china.com\/wp-content\/uploads\/2026\/06\/Concentric-Butterfly-Valves12-150x150.jpg"}}},"alt_text":"","url":"","target":""}]]}},"yoast_head":"\nConcentric Butterfly Valves - Wuxi Accton Fluid Technology Co., Ltd.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.actuator-china.com\/pt\/,https:\/\/www.actuator-china.com\/products\/concentric-butterfly-valves-12\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Concentric Butterfly Valves - Wuxi Accton Fluid Technology Co., Ltd.\" \/>\n<meta property=\"og:description\" content=\"General Introduction First, concentric butterfly valves control pipeline cut-off and flow, and they serve oil, chemical, metallurgy and hydropower fields. 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Besides, their stem, disc and body share one center line to cut production cost and balance open-close torque. 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