{"id":2469,"count":2,"description":"\r\n\r\n\r\n\r\nKELEBEK VANA MALZEME F\u0130YATI ALIN<\/strong><\/a>\r\n\r\n\r\n\r\n\r\n

Kelebek Vana Malzemesi<\/h2>\r\n\r\n\r\n\r\n\r\nA216 WCB, A216 WCC, A217 WC6, A217 WC9 ve benzeri gibi farkl\u0131 uygulamalar\u0131n gereksinimlerine uyacak \u015fekilde kelebek vana i\u00e7in \u00e7e\u015fitli malzemeler mevcuttur. Zengin tecr\u00fcbemiz ve sekt\u00f6r ihtiya\u00e7lar\u0131m\u0131za g\u00f6re kelebek vana \u00fcretmek i\u00e7in uygun malzemeyi se\u00e7iyoruz. \u015eu anda a\u011f\u0131rl\u0131kl\u0131 olarak paslanmaz \u00e7elik kelebek vanalar ve kriyojenik kelebek vanalar tedarik ediyoruz. Daha detayl\u0131 bilgi almak i\u00e7in \u00fcr\u00fcne t\u0131klayabilirsiniz.\r\n\r\n\r\n\r\n\r\n

Malzemeye G\u00f6re Sat\u0131l\u0131k Kelebek Vana Listesi<\/h2>\r\n\r\n\r\n\r\n
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\"Paslanmaz
Paslanmaz \u00c7elik Kelebek Vana\/ VANA FIYATINI AL ><\/em><\/a><\/figcaption><\/figure>\r\n\r\n\r\n\r\n\r\nPaslanmaz \u00c7elik Kelebek Vana ZECO paslanmaz \u00e7elik kelebek vana, y\u00fcksek performansl\u0131 ve uzun \u00f6m\u00fcrl\u00fc bir kelebek vana t\u00fcr\u00fcd\u00fcr. Esas olarak tahrik cihazlar\u0131 ve paslanmaz \u00e7elik par\u00e7alardan olu\u015fur.\/ VALF F\u0130YATI AL ><\/a>\r\n\r\n\r\n\r\n<\/div>\r\n\r\n\r\n\r\n
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\"Kriyojenik
Kriyojenik Kelebek Vana\/ VANA FIYATINI AL ><\/em><\/a><\/figcaption><\/figure>\r\n\r\n\r\n\r\n\r\nKriyojenik Kelebek Vana ZECO kriyojenik kelebek vana g\u00f6vde hacmi k\u00fc\u00e7\u00fck ve simetrik \u015fekilli olup, et kal\u0131nl\u0131\u011f\u0131 \u00fcniformdur.\/ VANA F\u0130YATI ALIN ><\/a>\r\n\r\n\r\n\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n\r\n\r\n\r\n

Kelebek Vana Malzemesinin Tan\u0131t\u0131m\u0131<\/h2>\r\n\r\n\r\n\r\n\r\nA216 WCB ve A216 WCC, kelebek vana g\u00f6vdeleri ve diski i\u00e7in yayg\u0131n olarak kullan\u0131lan malzemelerdir; su, ya\u011f, gaz, buhar ve di\u011fer a\u015f\u0131nd\u0131r\u0131c\u0131 olmayan ortamlar i\u00e7in uygundurlar, bazen NACE'nin at\u0131lmas\u0131ndan sonra ek\u015fi servis i\u00e7in de kullan\u0131labilirler. MR-01-75 veya NACE MR-01-03 ve korozyon tolerans\u0131n\u0131 dikkate al\u0131n. -29\u00b0C'nin alt\u0131ndaki d\u00fc\u015f\u00fck s\u0131cakl\u0131klar ve 425\u00b0C'nin \u00fczerindeki y\u00fcksek s\u0131cakl\u0131klar i\u00e7in uygun olmad\u0131klar\u0131na dikkat edilmelidir.\r\n\r\n\r\n\r\n\r\n\r\nWCC Valf G\u00f6vdesi<\/strong>\r\n\r\n\r\n\r\n\r\n\r\nWCC S\u0131n\u0131f\u0131, y\u00fcksek s\u0131cakl\u0131kta hizmet i\u00e7in vanalar, ba\u011flant\u0131 par\u00e7alar\u0131, flan\u015flar ve di\u011fer bas\u0131n\u00e7 i\u00e7eren par\u00e7alar i\u00e7in karbon \u00e7eli\u011fi d\u00f6k\u00fcmlerini ve f\u00fczyon kayna\u011f\u0131yla di\u011fer d\u00f6k\u00fcmler veya d\u00f6vme \u00e7elik par\u00e7alarla montaj i\u00e7in gereken kaliteyi kapsayan ASTM A216 standard\u0131 kapsam\u0131ndad\u0131r.\r\n\r\n\r\n\r\n\r\n\r\nA217 WC6 ve A217 WC9 genellikle y\u00fcksek s\u0131cakl\u0131k uygulamalar\u0131 i\u00e7in kullan\u0131l\u0131r, genellikle ortam y\u00fcksek s\u0131cakl\u0131kta buhar veya s\u0131cak havad\u0131r, bu t\u00fcr uygulamalar i\u00e7in valf metalden metale yuvaya veya SS+Grafit yuva halkas\u0131na sahiptir. S\u0131k\u0131 kapatmay\u0131 sa\u011flamak i\u00e7in bu vanalar genellikle \u00fc\u00e7l\u00fc eksantrik tasar\u0131ma sahiptir.\r\n\r\n\r\n\r\n\r\n\r\nWC6 Valf G\u00f6vdesi<\/strong>\r\n\r\n\r\n\r\n\r\n\r\nASTM A217Gr. WC6 Vanalar\u0131 WC6 malzemeden yap\u0131lm\u0131\u015ft\u0131r. ASTM A217 spesifikasyonu, molibden ve krom molibden \u00e7eliklerinden olu\u015fan d\u00fc\u015f\u00fck ala\u015f\u0131ml\u0131 bir \u00e7elik grubunu i\u00e7erir. WC6 malzemesi 1 \u00bc krom \u00bd molibden \u00e7eli\u011finden olu\u015fur.\r\n\r\n\r\n\r\n\r\n\r\nA352 LCB ve A352 LCC genellikle d\u00fc\u015f\u00fck s\u0131cakl\u0131k uygulamalar\u0131 i\u00e7in kullan\u0131l\u0131r; genellikle ortam d\u00fc\u015f\u00fck s\u0131cakl\u0131ktad\u0131r ancak -46\u00b0C'nin \u00fczerindedir veya vana, so\u011fuk bir ortamda d\u0131\u015f mekana monte edilir. Ancak bu malzemeler 345\u00b0C'nin \u00fczerindeki y\u00fcksek s\u0131cakl\u0131klarda kullan\u0131lamaz.\r\n\r\n\r\n\r\n\r\n\r\nA351 CF8, A351 CF8M, A351 CF3 ve A351 CF3M, paslanmaya ve korozyona kar\u015f\u0131 dayan\u0131kl\u0131 olan bu \u00f6stenitik paslanmaz \u00e7elik, \u00e7e\u015fitli asit t\u00fcrlerinin ortam\u0131na uygundur. Ayr\u0131ca d\u00fc\u015f\u00fck s\u0131cakl\u0131k ve y\u00fcksek s\u0131cakl\u0131k uygulamalar\u0131nda da m\u00fckemmel performans g\u00f6sterirler ancak maliyetleri karbon \u00e7eli\u011finden \u00e7ok daha y\u00fcksektir.\r\n\r\n\r\n\r\n\r\n\r\nB148 C95500 ve B148 C95800 gibi al\u00fcminyum-bronz deniz suyu uygulamalar\u0131 i\u00e7in son derece uygundur. Al-Bronze kelebek vana, a\u00e7\u0131k deniz uygulamalar\u0131nda ve deniz suyu boru hatlar\u0131nda yayg\u0131n olarak kullan\u0131lmaktad\u0131r. Maliyeti y\u00fcksek oldu\u011fundan, b\u00fcy\u00fck boyutlu bir kelebek vana genellikle merkez hatt\u0131 tasar\u0131m\u0131nda disk malzemesi olarak kullan\u0131l\u0131r.\r\n\r\n\r\n\r\n\r\n\r\nDubleks \u00c7elik A890 4A, A890 5A, SAF2205, S31803 ve s\u00fcper dubleks \u00e7elik A890 6A, SAF2507 ve S32750, Al-Bronzun benzer uygulama aral\u0131\u011f\u0131na sahiptirler, klor\u00fcr korozyonuna kar\u015f\u0131 iyi bir dirence sahiptirler, bu nedenle deniz suyu uygulamalar\u0131nda ve su \u00fcretiminde yayg\u0131n olarak kullan\u0131l\u0131rlar ba\u015fvuru.\r\n\r\n\r\n\r\n\r\n

Valf \u00dczerindeki Yuva Nedir?<\/h2>\r\n\r\n\r\n\r\n\r\nTemel olarak valf yuvas\u0131, valfin hareketli bile\u015feninin kapal\u0131 konumdayken durdu\u011fu yerdir. Kelebek vana uygulamalar\u0131nda disk, vanay\u0131 kapatmak ve s\u0131zd\u0131rmaz hale getirmek i\u00e7in yuvaya g\u00fcvenli bir \u015fekilde oturur. Koltuklar, bir prosesin termal, s\u00fcrt\u00fcnme ve darbe gerilimlerine ra\u011fmen contay\u0131 sa\u011flam tutacak \u015fekilde tasarlanm\u0131\u015ft\u0131r.\r\n\r\n\r\n\r\n\r\n

Kelebek Vana Koltuk Malzemesinin Tan\u0131t\u0131m\u0131<\/h2>\r\n\r\n\r\n\r\n\r\nValf yuvas\u0131, valfin i\u00e7indeki s\u00f6k\u00fclebilir bir par\u00e7ad\u0131r. Ana i\u015flevi, valf \u00e7ekirde\u011finin tamamen kapal\u0131 veya tamamen kapal\u0131 olmas\u0131n\u0131 desteklemek ve bir s\u0131zd\u0131rmazl\u0131k \u00e7ifti olu\u015fturmakt\u0131r. Normal \u015fartlarda valf yuvas\u0131n\u0131n \u00e7ap\u0131 valfin boyutu kadard\u0131r. Kelebek vana yuvas\u0131 \u00e7ok \u00e7e\u015fitli malzemelerden yap\u0131lm\u0131\u015ft\u0131r ancak yayg\u0131n olarak kullan\u0131lan malzemeler aras\u0131nda yumu\u015fak contal\u0131 EPDM, nitril kau\u00e7uk (NBR), politetrafloroetilen (PTFE) ve metal sert contal\u0131 sert ala\u015f\u0131m malzemeler bulunur. t\u00fcr. A\u015fa\u011f\u0131da bunlar\u0131 tek tek tan\u0131tal\u0131m.\r\n\r\n\r\n\r\n\r\n
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  1. EPDM: Di\u011fer genel ama\u00e7l\u0131 kau\u00e7uklarla kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda EPDM'nin b\u00fcy\u00fck avantajlar\u0131 vard\u0131r.\r\n
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    • Maliyet performans\u0131 \u00e7ok y\u00fcksektir. Yayg\u0131n olarak kullan\u0131lan kau\u00e7uklar aras\u0131nda EPDM, ham kau\u00e7uk yo\u011funlu\u011fu en hafif olan\u0131d\u0131r ve b\u00fcy\u00fck miktarda doldurulabilir, bu da kau\u00e7u\u011fun maliyetini d\u00fc\u015f\u00fcr\u00fcr.<\/li>\r\n \t
    • EPDM malzeme ya\u015flanmaya, g\u00fcne\u015fe maruz kalmaya, \u0131s\u0131ya, neme ve radyasyona kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r ve zay\u0131f asit ve zay\u0131f alkali ortamlar i\u00e7in uygundur. \u0130yi yal\u0131t\u0131m \u00f6zellikleri.<\/li>\r\n \t
    • Uygulanabilir s\u0131cakl\u0131k aral\u0131\u011f\u0131 -40\u00b0C\u201360\u00b0C kadar d\u00fc\u015f\u00fck olabilir ve 130\u00b0C s\u0131cakl\u0131k ko\u015fullar\u0131nda uzun s\u00fcre kullan\u0131labilir.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t
    • Nitril kau\u00e7uk (NBR): ya\u011f direnci, \u0131s\u0131 direnci, a\u015f\u0131nma direnci ve iyi su direnci, hava ge\u00e7irmezlik ve m\u00fckemmel yap\u0131\u015fma \u00f6zellikleri. Petrol boru hatlar\u0131nda yayg\u0131n olarak kullan\u0131l\u0131r. Dezavantaj\u0131 ise d\u00fc\u015f\u00fck s\u0131cakl\u0131klara, ozona dayan\u0131kl\u0131 olmamas\u0131, izolasyon performans\u0131n\u0131n zay\u0131f olmas\u0131 ve genel elastikiyettir.<\/li>\r\n \t
    • Politetrafloroetilen (PTFE): Bir floroplastik olan bu malzeme asitlere, alkalilere ve \u00e7e\u015fitli organik \u00e7\u00f6z\u00fcc\u00fclere kar\u015f\u0131 g\u00fc\u00e7l\u00fc bir dirence sahiptir. Ayn\u0131 zamanda malzeme y\u00fcksek s\u0131cakl\u0131klara dayan\u0131kl\u0131 olup 260\u00b0C'de s\u00fcrekli olarak kullan\u0131labilir ve maksimum kullan\u0131m s\u0131cakl\u0131\u011f\u0131 290-320\u00b0C'ye ula\u015fabilmektedir. PTFE'nin ortaya \u00e7\u0131k\u0131\u015f\u0131 kimya, petrol, ila\u00e7 ve di\u011fer end\u00fcstrilerdeki bir\u00e7ok sorunu ba\u015far\u0131yla \u00e7\u00f6zm\u00fc\u015ft\u00fcr.<\/li>\r\n \t
    • VITON (V): 0\u00b0F ile 300\u00b0F aras\u0131ndaki s\u0131cakl\u0131klar i\u00e7in derecelendirilmi\u015ftir. Viton bir EI DuPont ticari markas\u0131d\u0131r. Un, e\u015fde\u011fer florokarbon elastomerinin 3M'nin ticari markas\u0131d\u0131r. Bu malzeme daha y\u00fcksek s\u0131cakl\u0131k direnci ve ola\u011fan\u00fcst\u00fc kimyasal diren\u00e7 sunar. Hidrokarbon \u00fcr\u00fcnlerine ve mineral asitlere, hem seyreltik hem de konsantre \u00e7\u00f6zeltilere kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r. Ancak asla buhar uygulamalar\u0131nda kullan\u0131lmaz ve su kullan\u0131m\u0131 a\u00e7\u0131s\u0131ndan nispeten zay\u0131ft\u0131r.<\/li>\r\n \t
    • Metal sert conta (sert ala\u015f\u0131m): Metal sert conta valf yuvas\u0131n\u0131n malzemesi \u00e7ok iyi y\u00fcksek s\u0131cakl\u0131k ve y\u00fcksek bas\u0131n\u00e7 direncine, korozyon direncine, a\u015f\u0131nma direncine ve di\u011fer \u00f6zelliklere sahiptir; bu da yumu\u015fak conta malzemesinin kusurlar\u0131n\u0131 telafi eder. y\u00fcksek s\u0131cakl\u0131\u011fa ve y\u00fcksek bas\u0131nca dayan\u0131kl\u0131 de\u011fildir. Ancak sert conta malzemesinin i\u015fleme teknolojisi a\u00e7\u0131s\u0131ndan y\u00fcksek gereksinimleri vard\u0131r. Metal sert contal\u0131 valf yuvas\u0131n\u0131n tek dezavantaj\u0131 s\u0131zd\u0131rmazl\u0131k performans\u0131n\u0131n zay\u0131f olmas\u0131 ve uzun s\u00fcre \u00e7al\u0131\u015ft\u0131ktan sonra s\u0131z\u0131nt\u0131 meydana gelmesidir.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n

      Ne T\u00fcr Malzeme Kullanmal\u0131y\u0131m?<\/h2>\r\n\r\n\r\n\r\n\r\nBaz\u0131 kelebek vana yuvas\u0131 \u00f6zellikleri di\u011ferleriyle \u00f6rt\u00fc\u015fmektedir. A\u015fa\u011f\u0131da bu malzemelerin yan yana kar\u015f\u0131la\u015ft\u0131rmas\u0131 bulunmaktad\u0131r.\r\n\r\n\r\n\r\n\r\n\r\nEPDM ve BUNA<\/strong>\r\n\r\n\r\n\r\n\r\n\r\nEPDM alkalilere, asitlere ve ketonlara kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r. EPDM, petrol bazl\u0131 yak\u0131tlar, ya\u011f ve polar olmayan solventler i\u00e7eren uygulamalar i\u00e7in uygun de\u011fildir ancak BUNA uygundur.\r\n\r\n\r\n\r\n\r\n\r\nHem EDPM hem de BUNA a\u015f\u0131nmaya ve y\u0131rt\u0131lmaya kar\u015f\u0131 dayan\u0131kl\u0131yken, EDPM \u0131s\u0131ya BUNA'dan daha dayan\u0131kl\u0131d\u0131r. EDPM ile BUNA'y\u0131 kar\u015f\u0131la\u015ft\u0131r\u0131rken EDPM, elementlere kar\u015f\u0131 dayan\u0131kl\u0131 oldu\u011fundan d\u0131\u015f mekan uygulamalar\u0131 i\u00e7in daha iyidir.\r\n\r\n\r\n\r\n\r\n\r\nV\u0130TON VS BUNA<\/strong>\r\n\r\n\r\n\r\n\r\n\r\nVITON ve BUNA hem s\u0131k\u0131\u015ft\u0131rma setine dayan\u0131kl\u0131d\u0131r hem de \u00e7o\u011fu ya\u011fa, ya\u011flay\u0131c\u0131ya ve petrol bazl\u0131 malzemeye dayan\u0131kl\u0131d\u0131r.\r\n\r\n\r\n\r\n\r\n\r\nVITON ile BUNA'y\u0131 kar\u015f\u0131la\u015ft\u0131r\u0131rken temel fark s\u0131cakl\u0131k direncidir. VITON, BUNA'dan yakla\u015f\u0131k 150\u00b0 daha y\u00fcksek s\u0131cakl\u0131klarda bir s\u0131zd\u0131rmazl\u0131k sa\u011flar. Ancak BUNA, VITON'a g\u00f6re \u00e7ok daha so\u011fuk s\u0131cakl\u0131klarda s\u0131zd\u0131rmazl\u0131k sa\u011flayabilir.\r\n\r\n\r\n\r\n\r\n\r\nVITON, d\u0131\u015f mekan elemanlar\u0131 i\u00e7in BUNA'ya g\u00f6re daha iyi dayan\u0131r, ancak BUNA'n\u0131n a\u011f\u0131r end\u00fcstriyel uygulamalar i\u00e7in daha iyi oldu\u011fu d\u00fc\u015f\u00fcn\u00fclmektedir.\r\n\r\n\r\n\r\n\r\n\r\nEPDM ve PTFE<\/strong>\r\n\r\n\r\n\r\n\r\n\r\nEPDM bir monomerdir ve PFTE (Teflon) bir floropolimerdir. EPDM ile PFTE'yi kar\u015f\u0131la\u015ft\u0131r\u0131rken s\u0131cakl\u0131k tolerans\u0131 ve esneklik temel farklard\u0131r. PTFE, hem so\u011fuk hem de a\u015f\u0131r\u0131 s\u0131caklarda daha geni\u015f bir s\u0131cakl\u0131k aral\u0131\u011f\u0131na dayanabilir.\r\n\r\n\r\n\r\n\r\n\r\nEPDM tekrarlayan harekete dayanan, y\u0131rt\u0131lmaya kar\u015f\u0131 dayan\u0131kl\u0131 bir kau\u00e7uktur, oysa PFTE elastik de\u011fildir. PTFE petrol prosesleri i\u00e7in idealdir, EPDM ise HVAC uygulamalar\u0131 i\u00e7in uygundur.\r\n\r\n","link":"https:\/\/zecovalve.com\/tr\/urun-kategori%cc%87si%cc%87\/butterfly-valve\/butterfly-valve-by-material","name":"Malzemeye G\u00f6re Kelebek Vana","slug":"butterfly-valve-by-material","taxonomy":"product_cat","parent":2044,"meta":[],"yoast_head":"\nButterfly Material - Butterfly Valve Seat Material | Butterfly Valve Manufacturer - ZECO<\/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:\/\/zecovalve.com\/tr\/urun-kategori\u0307si\u0307\/butterfly-valve\/butterfly-valve-by-material\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Butterfly Material - Butterfly Valve Seat Material | Butterfly Valve Manufacturer - ZECO\" \/>\n<meta property=\"og:description\" content=\"GET BUTTERFLY VALVE MATERIAL PRICE Butterfly Valve Material There is various kind of materials available for butterfly valve to suit the requirement of different application, such as A216 WCB, A216 WCC, A217 WC6, A217 WC9, and so on. According to our rich experience and industry needs, we select the proper material to produce butterfly valves. Currently, we mainly supply stainless steel butterfly valves and cryogenic butterfly valves. You may click the product to get more details. Butterfly Valves for Sale List by Material Stainless Steel Butterfly Valve\/ GET VALVE PRICE > Stainless Steel Butterfly Valve ZECO stainless steel butterfly valve is a kind of butterfly valve with high performance and long service life. It is mainly composed of driving devices and stainless steel parts.\/ GET VALVE PRICE > Cryogenic Butterfly Valve\/ GET VALVE PRICE > Cryogenic Butterfly Valve ZECO cryogenic butterfly valve body volume is small and symmetrical in shape, and the wall thickness is uniform.\/ GET VALVE PRICE > Introduction of Butterfly Valve Material A216 WCB and A216 WCC are commonly used materials for the butterfly valve bodies and disc, they are suitable for water, oil, gas, steam, and other non-corrosive media, some times they can also be used for sour service after disposing of NACE MR-01-75 or NACE MR-01-03 and consider corrosion allowance in. It should be noticed that they are not suitable for low-temperature below -29\u2103 and high-temperature over 425\u2103. WCC Valve Body Grade WCC is covered by ASTM A216 standard, which specification covers carbon steel castings for valves, fittings, flanges, and other pressure-containing parts for high-temperature service and the quality required for assembly with other castings or wrought steel parts by fusion welding. A217 WC6 and A217 WC9 are usually used for high-temperature applications, usually, the medium is high-temperature steam or hot air, for such applications, the valve is with metal to metal seat or SS+Graphite seat ring. In order to achieve tight shut-off, these valves are usually of a triple eccentric design. WC6 Valve Body ASTM A217 Gr. WC6 Valves are made up of WC6 material. The specification ASTM A217 includes a low alloy steel group of molybdenum and chromium molybdenum steels. The WC6 material is 1 \u00bc chromium \u00bd molybdenum steel. A352 LCB and A352 LCC are usually used for low-temperature applications, usually, the medium is of low-temperature but over -46\u2103 or the valve is installed outdoors in an area of a cold environment. But these materials can not be used for high-temperature over 345\u2103. A351 CF8, A351 CF8M, A351 CF3, and A351 CF3M, these austenitic stainless steel that is anti-rust and anti-corrosion, suitable for the medium of various kinds of acid. They also perform great for low-temperature and high-temperature applications but their cost of them is much higher than carbon steel. Aluminum-bronze like B148 C95500 and B148 C95800 are perfectly suitable for seawater application. Al-Bronze butterfly valve is widely used in offshore applications and seawater pipelines. Because the cost of it is high, a big-size butterfly valve usually uses as a disc material for centerline design. Duplex Steel A890 4A, A890 5A, SAF2205, S31803 and super duplex steel A890 6A, SAF2507, and S32750 have similar application range of Al-Bronze, they have good resistance to chloride corrosion, so they are widely used for seawater application and produced water application. What is a Seat On a Valve? Essentially, a valve seat is where the moving component of a valve rests when in the closed position. In butterfly valve applications, the disc rests securely on the seat to close and seal the valve. Seats are designed to keep the seal intact despite the thermal, friction, and impact stresses of a process. Introduction of Butterfly Valve Seat Material The valve seat is a detachable part inside the valve. Its main function is to support the valve core to be fully closed or fully closed and to form a sealing pair. Under normal circumstances, the diameter of the valve seat is the size of the valve. The butterfly valve seat is made of a wide range of materials, but the commonly used materials include soft-seal EPDM, nitrile rubber (NBR), polytetrafluoroethylene (PTFE), and metal hard-seal hard alloy materials. kind. Let\u2019s introduce them one by one below. EPDM: Compared with other general-purpose rubbers, EPDM has great advantages. The cost performance is very high. Among the commonly used rubbers, EPDM has the lightest raw rubber density and can be filled in a large amount, reducing the cost of the rubber. EPDM material is resistant to aging, sun exposure, heat resistance, moisture resistance, and radiation resistance, and is suitable for weak acid and weak alkali media. Good insulation properties. The applicable temperature range can be as low as -40\u2103\u201360\u2103, and it can be used for a long time under the temperature condition of 130\u2103. Nitrile rubber (NBR): oil resistance, heat resistance, abrasion resistance and good water resistance, air tightness, and excellent bonding properties. It is widely used in petroleum pipelines. The disadvantage is that it is not resistant to low temperatures, ozone, poor insulation performance, and general elasticity. Polytetrafluoroethylene (PTFE): A fluoroplastic, this material has strong resistance to acids, alkalis, and various organic solvents. At the same time, the material is resistant to high temperatures and can be used continuously at 260\u00b0C, and the maximum use temperature can reach 290-320\u00b0C. The emergence of PTFE has successfully solved many problems in the chemical, petroleum, pharmaceutical, and other industries. VITON (V): Rated for temperatures 0\u00b0F to 300\u00b0F. Viton is an E.I. DuPont trademark. Flour is 3M\u2019s trademark for the equivalent fluorocarbon elastomer. This material offers higher temperature resistance and outstanding chemical resistance. It is resistant to hydrocarbon products and mineral acids, both dilute and concentrated solutions. However, it is never to be used in steam applications and is relatively poor in water service. Metal hard seal (hard alloy): The material of the metal hard seal valve seat has very good high temperature and high-pressure resistance, corrosion resistance, wear resistance, and other characteristics, which makes up for the defects of soft seal material that is not resistant to high temperature and high pressure. However, the hard seal material has high requirements on the processing technology. The only disadvantage of the metal hard seal valve seat is that the sealing performance is poor, and leakage will occur after a long time of operation. What Type of Material Should I Use? Some butterfly valve seat characteristics overlap with others. Below is a side-by-side comparison of these materials. EPDM vs BUNA EPDM is resistant to alkalis, acids, and ketones. EPDM is not suitable for applications that involve petroleum-based fuels, oil, and non-polar solvents, but BUNA is. While both EDPM and BUNA are abrasion and tear-resistant, EDPM is more heat-resistant than BUNA. When comparing EDPM vs BUNA, EDPM is better for outdoor applications as it stands up to elements. VITON VS BUNA VITON and BUNA are both compression set resistant and endure most oils, lubricants, and petroleum-based materials. When comparing VITON vs BUNA, the main difference is temperature resistance. VITON maintains a seal with temperatures about 150\u00b0 hotter than BUNA would. However, BUNA can maintain a seal in much colder temperatures than VITON. VITON stands up better for outdoor elements than BUNA, but BUNA is considered to be better for heavy-duty industrial applications. EPDM VS PTFE EPDM is a monomer and PFTE (Teflon) is a fluoropolymer. When comparing EPDM vs PFTE, temperature tolerance and flexibility are the main differences. PTFE can withstand a wider range of temperatures of both cold and hot extremes. EPDM is a tear-resistant rubber that endures repetitive motion, whereas PFTE is inelastic. 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