{"id":1037,"date":"2021-12-27T10:09:13","date_gmt":"2021-12-27T10:09:13","guid":{"rendered":"https:\/\/zecovalve.com\/thermoplastic-materials-as-valve-seat.html"},"modified":"2022-10-17T06:11:34","modified_gmt":"2022-10-17T06:11:34","slug":"thermoplastic-materials-as-valve-seat","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/tr\/thermoplastic-materials-as-valve-seat.html","title":{"rendered":"K\u00fcresel Vana Yuvas\u0131 olarak termoplastik malzemeler"},"content":{"rendered":"<p>Valflerde \u00e7ok say\u0131da termoplastik malzeme, \u00f6zellikle k\u00fcresel valf uygulamalar\u0131 i\u00e7in yumu\u015fak yatak se\u00e7enekleri olarak sunulmaktad\u0131r. Ayr\u0131ca astarl\u0131 kelebek vana, astarl\u0131 k\u00fcresel vana, astarl\u0131 \u00e7ek valf gibi astarl\u0131 vanalar da mevcuttur. <\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">K\u00fcresel Vana Koltu\u011fu<\/h2>\n\n\n\n<p>K\u00fcresel vanalar, bir boru hatt\u0131ndaki s\u0131v\u0131 ak\u0131\u015f\u0131n\u0131n ve bas\u0131nc\u0131n kontrol edilmesinde kritik bir rol oynar, ancak etkinlikleri ve g\u00fcvenlikleri yaln\u0131zca kullan\u0131lan yuva malzemesi kadar iyidir. Bu blog yaz\u0131s\u0131nda, yayg\u0131n olarak kullan\u0131lan be\u015f k\u00fcresel vana yuvas\u0131 malzemesinin temellerini inceleyece\u011fiz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><mark style=\"background-color:var(--base)\" class=\"has-inline-color has-contrast-2-color\"><a href=\"https:\/\/zecovalve.com\/tr\/urun-kategori%cc%87si%cc%87\/ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">K\u00fcresel Vanalar<\/a><\/mark><\/strong><\/h3>\n\n\n\n<p>S\u0131z\u0131nt\u0131n\u0131n \u00e7evresel a\u00e7\u0131dan y\u0131k\u0131c\u0131 olabilece\u011fi bir petrokimya uygulamas\u0131nda veya temizlik ve sanitasyonun kritik oldu\u011fu bir farmas\u00f6tik laboratuvar\u0131nda bulunsa da, k\u00fcresel vana yuvalar\u0131n\u0131n g\u00fcvenilir ve sa\u011flam olmas\u0131 gerekir. Bir k\u00fcresel vana, vanan\u0131n g\u00f6vdesinden, g\u00f6vde kapa\u011f\u0131ndan, g\u00f6vdeden, kat\u0131 bilyeden ve yuvarlak k\u00fcresel vana yuvas\u0131ndan olu\u015fur.<\/p>\n\n\n\n<p>K\u00fcresel vana yuvas\u0131, i\u00e7erideki s\u0131v\u0131n\u0131n s\u0131zd\u0131rmaz hale getirilmesinden ve oturma geriliminin e\u015fit \u015fekilde da\u011f\u0131t\u0131lmas\u0131ndan sorumludur. Yumu\u015fak yatakl\u0131 k\u00fcresel vana tasar\u0131mlar\u0131nda conta olarak bir elastomer veya polimer kullan\u0131l\u0131r ve metalik bir oturma halkas\u0131na tak\u0131l\u0131r. Sert yatakl\u0131 k\u00fcresel vanalar\u0131n aksine bu yakla\u015f\u0131m pop\u00fclerdir \u00e7\u00fcnk\u00fc iyi bir s\u0131zd\u0131rmazl\u0131k etkisi sa\u011flar, daha hafiftir ve daha uygun maliyetlidir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">K\u00fcresel Vana Yuvas\u0131 Malzemelerinin Temel \u00d6zellikleri<\/h3>\n\n\n\n<p>K\u00fcresel vana yuvas\u0131 i\u00e7in polimer malzeme se\u00e7erken \u00e7ok say\u0131da fakt\u00f6r s\u00f6z konusudur. Temel malzeme \u00f6zellikleri aras\u0131nda\u2026<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>G\u00fcvenilir bir s\u0131zd\u0131rmazl\u0131k sa\u011flamak i\u00e7in yeterli s\u00fcneklik<\/li><li>G\u00fcvenilir s\u0131zd\u0131rmazl\u0131k ve performans i\u00e7in k\u00fcresel vana yuvas\u0131n\u0131n \u015feklini korumas\u0131n\u0131 sa\u011flayan boyutsal kararl\u0131l\u0131k<\/li><li>Mil torkunu minimumda tutmak i\u00e7in \u00e7ok d\u00fc\u015f\u00fck s\u00fcrt\u00fcnme<\/li><li>S\u0131cakl\u0131k de\u011fi\u015fiklikleri meydana geldi\u011finde k\u00fcresel vana yuvas\u0131n\u0131n \u015feklini koruyabilmesi i\u00e7in d\u00fc\u015f\u00fck termal genle\u015fme katsay\u0131s\u0131<\/li><li>Uzun servis \u00f6mr\u00fc i\u00e7in m\u00fckemmel a\u015f\u0131nma direnci<\/li><li>\u0130lgili t\u00fcm ortamlarla kimyasal uyumluluk<\/li><li>Baz\u0131 \u00e7al\u0131\u015fma ortamlar\u0131nda k\u00fcresel vana yuvas\u0131 malzemelerinin \u015fu \u00f6zellikleri sergilemesi de \u00f6nemlidir:<\/li><li>Su veya y\u00fcksek nem varl\u0131\u011f\u0131nda boyutsal de\u011fi\u015fiklikleri \u00f6nlemek i\u00e7in d\u00fc\u015f\u00fck nem emilimi<\/li><li>S\u0131cak su, buhar ve sert temizlik kimyasallar\u0131n\u0131 i\u00e7erebilen tekrarlanan sterilizasyonla performans\u0131 koruyun<\/li><li>Ani dekompresyon (\u00f6rn. 650 psi&#039;nin \u00fczerindeki bas\u0131n\u00e7 d\u00fc\u015f\u00fc\u015fleri) durumunda iyi performans<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">K\u00fcresel Vana Yuvalar\u0131 i\u00e7in \u00d6nerilen Malzemeler<\/h3>\n\n\n\n<p>Asetal, PEEK, PTFE, TFM ve UHMW-PE dahil \u00e7e\u015fitli malzemeler k\u00fcresel vana yuvalar\u0131 olarak iyi \u00e7al\u0131\u015f\u0131r.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">PEEK K\u00fcresel Vana Yuvalar\u0131<\/h4>\n\n\n\n<p>S\u0131cakl\u0131k Aral\u0131\u011f\u0131: -50\u00b0F ila 550\u00b0F<\/p>\n\n\n\n<p>Oda S\u0131cakl\u0131\u011f\u0131nda Maksimum Bas\u0131n\u00e7: 6000 psi<\/p>\n\n\n\n<p>Bej renk<\/p>\n\n\n\n<p>PEEK m\u00fckemmel kimyasal diren\u00e7, \u00e7ok d\u00fc\u015f\u00fck s\u00fcrt\u00fcnme, kendi kendine ya\u011flama sunar ve alev geciktirici olmas\u0131n\u0131n yan\u0131 s\u0131ra geni\u015f bir \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 aral\u0131\u011f\u0131na da sahiptir (-70\u00b0F ile 550\u00b0F aras\u0131). \u00c7ok agresif uygulamalar\u0131n \u00fcstesinden gelebilir ve s\u0131cak su ve buhara ihtiya\u00e7 duyuldu\u011funda iyi \u00e7al\u0131\u015f\u0131r, ancak s\u00fclf\u00fcrik asit varl\u0131\u011f\u0131nda iyi performans g\u00f6stermez.<\/p>\n\n\n\n<p>Buna ek olarak PEEK, n\u00fckleer uygulamalara \u00e7ok iyi adapte edilmi\u015ftir ve FDA onayl\u0131 kalitelerin yan\u0131 s\u0131ra geli\u015ftirilmi\u015f a\u015f\u0131nma \u00f6zelliklerine ve daha iyi termal iletkenli\u011fe sahip dolgulu s\u0131n\u0131flarda da mevcuttur. PEEK&#039;in genellikle \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 aral\u0131\u011f\u0131 PTFE&#039;nin d\u0131\u015f\u0131nda oldu\u011funda k\u00fcresel vana yuvalar\u0131 i\u00e7in se\u00e7ildi\u011fini unutmay\u0131n.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/PEEK.png\" alt=\"\" class=\"wp-image-15947\" width=\"500\" height=\"300\"\/><figcaption>PEEK<\/figcaption><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\">PTFE K\u00fcresel Vana Yuvalar\u0131<\/h4>\n\n\n\n<p>S\u0131cakl\u0131k Aral\u0131\u011f\u0131: -50\u00b0F ila 400\u00b0F<\/p>\n\n\n\n<p>Oda S\u0131cakl\u0131\u011f\u0131nda Maksimum Bas\u0131n\u00e7: 1000 psi<\/p>\n\n\n\n<p>Beyaz renk<\/p>\n\n\n\n<p>PTFE (ticari ad\u0131 Teflon olarak da bilinir), PEEK ile ayn\u0131 \u00f6zelliklerin \u00e7o\u011funa sahiptir ancak daha d\u00fc\u015f\u00fck s\u00fcrt\u00fcnme, kuru \u00e7al\u0131\u015fma \u00f6zellikleri ve daha kapsaml\u0131 kimyasal uyumluluk i\u00e7erir. PEEK gibi, FDA onayl\u0131 s\u0131n\u0131flarda mevcuttur ve -50\u00b0F&#039;ye kadar kriyojenik s\u0131cakl\u0131klara ve 550\u00b0F&#039;ye kadar y\u00fcksek s\u0131cakl\u0131klara ve 5.000 psi&#039;ye kadar bas\u0131n\u00e7lara dayanabilir.<\/p>\n\n\n\n<p>Ayr\u0131ca PEEK gibi PTFE de tekrar tekrar s\u0131cak suya ve buhara maruz kalsa bile performans\u0131n\u0131 s\u00fcrd\u00fcr\u00fcr. Ancak PTFE&#039;nin flor veya alkalilerin varl\u0131\u011f\u0131nda iyi performans g\u00f6stermedi\u011fini unutmay\u0131n. PTFE&#039;nin temizlenmesi de \u00e7ok kolayd\u0131r ve geli\u015fmi\u015f a\u015f\u0131nma \u00f6zellikleri, so\u011fuk s\u00fcr\u00fcnmeye daha az e\u011filim ve daha d\u00fc\u015f\u00fck termal iletkenlik sa\u011flayabilen cam veya karbonla g\u00fc\u00e7lendirilmi\u015f kalitelerde mevcuttur.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/PTFE.png\" alt=\"\" class=\"wp-image-15948\" width=\"500\" height=\"300\"\/><figcaption>PTFE<\/figcaption><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\">RPTFE K\u00fcresel Vana Koltuklar\u0131<\/h4>\n\n\n\n<p>S\u0131cakl\u0131k Aral\u0131\u011f\u0131: -50\u00b0F ila 450\u00b0F<\/p>\n\n\n\n<p>Oda S\u0131cakl\u0131\u011f\u0131nda Maksimum Bas\u0131n\u00e7: 2000 psi<\/p>\n\n\n\n<p>Renk: Kirli Beyaz<\/p>\n\n\n\n<p>RTFE, kimyasal uyumlulu\u011funu korurken PTFE&#039;ye g\u00f6re daha iyi a\u015f\u0131nma ve a\u015f\u0131nma direncine sahiptir. \u00c7ok y\u00f6nl\u00fc s\u0131cakl\u0131k \u00f6zellikleri, RTFE&#039;nin doymu\u015f buhar uygulamalar\u0131nda kullan\u0131lmas\u0131na olanak tan\u0131r. RTFE, \u00e7o\u011fu Zeco y\u00fczer k\u00fcresel vana i\u00e7in standart yuva malzemesidir. Bu koltuk kostik (sodyum hidroksit, potasyum hidroksit vb.) servisinde kullan\u0131lmamal\u0131d\u0131r.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/RTFE.png\" alt=\"\" class=\"wp-image-15949\" width=\"500\" height=\"300\"\/><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\">TFM K\u00fcresel Vana Yuvalar\u0131<\/h4>\n\n\n\n<p>S\u0131cakl\u0131k Aral\u0131\u011f\u0131: -75\u00b0F ila 500\u00b0F<\/p>\n\n\n\n<p>Oda S\u0131cakl\u0131\u011f\u0131nda Maksimum Bas\u0131n\u00e7: 2000 psi<\/p>\n\n\n\n<p>Renk: \u015eeffaf Beyaz<\/p>\n\n\n\n<p>TFM (bazen Dyneon markas\u0131yla an\u0131l\u0131r), PTFE&#039;nin en iyi \u00f6zelliklerini (d\u00fc\u015f\u00fck s\u00fcrt\u00fcnme, kimyasal diren\u00e7, y\u00fcksek s\u0131cakl\u0131k performans\u0131) daha iyi gerilim geri kazan\u0131m\u0131 ve daha y\u00fcksek bas\u0131n\u00e7larla ba\u015fa \u00e7\u0131kma yetene\u011fi ile birle\u015ftiren ikinci nesil bir PTFE malzemesidir. Ayr\u0131ca PTFE&#039;den daha elastik ve dayan\u0131kl\u0131d\u0131r. TFM&#039;nin \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 -100\u00b0F ila 450\u00b0F aras\u0131nda de\u011fi\u015fir ve buhar ve termal ak\u0131\u015fkanlar\u0131 i\u00e7eren uygulamalara iyi bir \u015fekilde uyarlanm\u0131\u015ft\u0131r.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/TFM.png\" alt=\"\" class=\"wp-image-15950\" width=\"500\" height=\"300\" srcset=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/TFM.png 793w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/TFM-600x361.png 600w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/TFM-300x180.png 300w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/TFM-768x462.png 768w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption>TFM<\/figcaption><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\">UHMW-PE K\u00fcresel Vana Contalar\u0131<\/h4>\n\n\n\n<p>S\u0131cakl\u0131k Aral\u0131\u011f\u0131: -40\u00b0F ila 180\u00b0F<\/p>\n\n\n\n<p>Oda S\u0131cakl\u0131\u011f\u0131nda Maksimum Bas\u0131n\u00e7: 2000 psi<\/p>\n\n\n\n<p>Renk: \u015eeffaf Beyaz<\/p>\n\n\n\n<p>Ultra Y\u00fcksek Molek\u00fcler A\u011f\u0131rl\u0131kl\u0131 Polietilen anlam\u0131na gelen UHMW-PE, d\u00fc\u015f\u00fck s\u00fcrt\u00fcnme katsay\u0131s\u0131na, -70\u00b0 F ila 200\u00b0F aras\u0131nda de\u011fi\u015fen \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131na, iyi kimyasal dirence, iyi boyutsal stabiliteye ve iyi a\u015f\u0131nma direncine sahiptir. Genel olarak UHMW-PE&#039;den yap\u0131lan k\u00fcresel vana yuvalar\u0131 1.500 psi&#039;ye kadar bas\u0131n\u00e7lar\u0131 kald\u0131rabilir ve d\u00fc\u015f\u00fck ila orta d\u00fczeyde radyasyona maruz kalmay\u0131 kald\u0131rabilir.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Delrin K\u00fcresel Vana Koltuklar\u0131<\/h4>\n\n\n\n<p>S\u0131cakl\u0131k Aral\u0131\u011f\u0131: -40\u00b0F ila 180\u00b0F<\/p>\n\n\n\n<p>Oda S\u0131cakl\u0131\u011f\u0131nda Maksimum Bas\u0131n\u00e7: 6000 psi<\/p>\n\n\n\n<p>Beyaz renk<\/p>\n\n\n\n<p>Agresif ortamlar s\u00f6z konusu oldu\u011funda Asetal (Delrin olarak da bilinir) s\u0131kl\u0131kla kullan\u0131l\u0131r. Asetal m\u00fckemmel a\u015f\u0131nma direnci sa\u011flar, \u00e7ok serttir, iyi toklu\u011fa sahiptir ve so\u011fuk ak\u0131\u015fa dayan\u0131kl\u0131d\u0131r. \u00c7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 aral\u0131\u011f\u0131 \u00e7ok geni\u015f olmasa da (-70\u00b0F ila 180\u00b0F), 5.000 psi&#039;ye kadar olan bas\u0131n\u00e7lar\u0131 kald\u0131rabilir. Asetal ayr\u0131ca radyoaktif ortamlarda da iyi \u00e7al\u0131\u015f\u0131r ancak oksijen ak\u0131\u015f\u0131yla kullan\u0131lmamal\u0131d\u0131r.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/UHMWPE.png\" alt=\"\" class=\"wp-image-15951\" width=\"500\" height=\"300\"\/><figcaption>UHMW-PE\/DELR\u0130N<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong><mark style=\"background-color:var(--base)\" class=\"has-inline-color has-contrast-2-color\"><a href=\"https:\/\/zecovalve.com\/tr\/urun-kategori%cc%87si%cc%87\/butterfly-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">Kelebek Vana<\/a><\/mark><\/strong><\/h2>\n\n\n\n<p>\u00c7e\u015fitli uygulamalar i\u00e7in farkl\u0131 tipte kelebek vanalar\u0131m\u0131z mevcuttur. Kullan\u0131lan kelebek vana contas\u0131n\u0131n t\u00fcr\u00fc uygulama ko\u015fullar\u0131na ba\u011fl\u0131d\u0131r: s\u0131cakl\u0131k, bas\u0131n\u00e7 ve ortam t\u00fcr\u00fc. Bir valfin hangi bas\u0131n\u00e7 ve s\u0131cakl\u0131\u011fa dayanabilece\u011fi hakk\u0131nda daha fazla bilgi i\u00e7in \u00fcreticinin yay\u0131nlad\u0131\u011f\u0131 teknik \u00f6zelliklere bak\u0131n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">BUNA-N (B) Kelebek Vana Yuvalar\u0131<\/h3>\n\n\n\n<p>BUNA-N, akrilonitril (ACN) ve b\u00fctadienin sentetik kau\u00e7uk kopolimeri olan nitrilin ba\u015fka bir ad\u0131d\u0131r. A\u015f\u0131nma direnci, \u00e7ekme mukavemeti ve d\u00fc\u015f\u00fck s\u0131k\u0131\u015ft\u0131rma ayar\u0131 nedeniyle bu kau\u00e7uk, conta end\u00fcstrisinde yayg\u0131n olarak kullan\u0131lan bir elastomerdir.<\/p>\n\n\n\n<p>BUNA-N, hidrolik s\u0131v\u0131lara, suya, alkollere, asitlere, petrol bazl\u0131 ya\u011flara, yak\u0131tlara, silikon greslere vb. kar\u015f\u0131 olduk\u00e7a dayan\u0131kl\u0131d\u0131r. Ancak onu g\u00fc\u00e7l\u00fc k\u0131lan \u015fey ayn\u0131 zamanda esnek olmamas\u0131n\u0131 da sa\u011flar. BUNA s\u0131cakl\u0131k derecesi 0\u00b0F ile 180\u00b0F aras\u0131ndad\u0131r ve 225\u00b0F&#039;ye kadar \u0131s\u0131ya dayan\u0131kl\u0131d\u0131r.<\/p>\n\n\n\n<p>Bu malzeme baz\u0131 otomotiv uygulamalar\u0131nda kullan\u0131lmaktad\u0131r. Ancak BUNA-N, aseton, keton, klorlu hidrokarbon, nitro hidrokarbon veya ozon i\u00e7eren uygulamalar i\u00e7in uygun de\u011fildir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">EPDM (E) Kelebek Vana Yuvalar\u0131<\/h3>\n\n\n\n<p>-30\u00b0F ile 250\u00b0F aras\u0131ndaki s\u0131cakl\u0131klar i\u00e7in derecelendirilmi\u015ftir. EPDM, Etilen Propilen Dien Monomer ad\u0131 verilen bir bile\u015fi\u011fin k\u0131saltmas\u0131d\u0131r. Ayn\u0131 zamanda yayg\u0131n olarak EPT, Nordel ve EPR olarak da adland\u0131r\u0131l\u0131r. EPDM, su, fosfat, esterler, ketonlar, alkoller ve glikoller gibi polar bile\u015fiklere kar\u015f\u0131 dayan\u0131kl\u0131l\u0131\u011f\u0131 nedeniyle HVAC end\u00fcstrisinde yayg\u0131n olarak kullan\u0131lmaktad\u0131r. EPDM malzemesi ayr\u0131ca konsantre s\u00fclf\u00fcrik asit, 20% sodyum hipoklorit (\u00e7ama\u015f\u0131r suyu), y\u00fczme havuzlar\u0131 i\u00e7in klorlu su ve di\u011fer alkalin \u00e7\u00f6zeltilerin i\u015flenmesi i\u00e7in de ge\u00e7erlidir. EPDM, hidrokarbon solventlere ve ya\u011flara, klorlu hidrokarbonlara, terebentine veya di\u011fer petrol bazl\u0131 ya\u011flara kar\u015f\u0131 dayan\u0131kl\u0131 de\u011fildir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PTFE (P) Kelebek Vana Yuvalar\u0131<\/h3>\n\n\n\n<p>PTFE, politetrafloroetilen teriminin k\u0131saltmas\u0131d\u0131r ve yayg\u0131n olarak Teflon olarak bilinir. Bu termoplastik floropolimer d\u00fc\u015f\u00fck s\u00fcrt\u00fcnmeye, kimyasal dirence ve yang\u0131na dayan\u0131kl\u0131l\u0131k \u00f6zelliklerine sahiptir. Teflon, baz\u0131 esnek oturmal\u0131 kelebek vanalar olu\u015fturmak i\u00e7in kullan\u0131l\u0131r.<\/p>\n\n\n\n<p>PTFE, kimyasal i\u015fleme veya petrol ve gaz gibi uygulamalarda uygun maliyetli bir malzemedir. Yal\u0131t\u0131m kalitesi nedeniyle elektrik uygulamalar\u0131na uyumludur. Ancak y\u00fcksek bas\u0131n\u00e7 ko\u015fullar\u0131nda kullan\u0131lmamal\u0131d\u0131r. PTFE s\u0131cakl\u0131k derecesi -50\u00b0F ile 400\u00b0F aras\u0131nda de\u011fi\u015fir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u0130TON (V) Kelebek Vana Yuvalar\u0131<\/h3>\n\n\n\n<p>VITON, Dupont taraf\u0131ndan \u00fcretilen bir florokarbon elastomerinin tescilli ticari markas\u0131d\u0131r. Bu malzemenin 3M&#039;deki versiyonu Un olarak biliniyor. Bu elastomer \u0131s\u0131ya ve kimyasallara kar\u015f\u0131 diren\u00e7 sunar.<\/p>\n\n\n\n<p>VITON, konsantre veya seyreltilmi\u015f mineral asitlere ve hidrokarbon \u00fcr\u00fcnlerine kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r. VITON s\u0131cakl\u0131k derecesi -20\u00b0F ile 300\u00b0F aras\u0131nda de\u011fi\u015fir.<\/p>\n\n\n\n<p>Florokarbon, petrol ya\u011flar\u0131, klorlu hidrokarbonlar, tuz \u00e7\u00f6zeltileri ve mineral asitleri i\u00e7eren uygulamalarda kullan\u0131l\u0131r. Is\u0131 tolerans\u0131 ve korozyona kar\u015f\u0131 direnci nedeniyle VITON, b\u0131\u00e7akl\u0131 s\u00fcrg\u00fcl\u00fc vana gibi vana yuvalar\u0131n\u0131n imalat\u0131nda kullan\u0131l\u0131r. Ancak bu vana su veya buhar i\u00e7eren proseslerle uyumlu de\u011fildir.<\/p>\n\n\n\n<p>A\u015fa\u011f\u0131daki b\u00f6l\u00fcm, bu malzemelerin \u00f6zelliklerinin, yeteneklerinin ve uygulamalar\u0131n\u0131n baz\u0131 temel y\u00f6nlerini \u00f6zetlemektedir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Malzeme t\u00fcrleri<\/h2>\n\n\n\n<p>Tablo 1, vana uygulamalar\u0131nda kullan\u0131lan polimer t\u00fcrlerini, bu K\u0131lavuzda bahsedilen malzemelerin ortak k\u0131saltmalar\u0131 ve Ticari \u0130simleriyle birlikte g\u00f6stermektedir.<span id=\"more-292\"><\/span><\/p>\n\n\n\n<p>Tablo 1 Yumu\u015fak koltuklu termoplastik malzemeler<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2021\/12\/20211227100912-61c990c8af69b.jpg\" alt=\"\" class=\"wp-image-295\" title=\"Yumu\u015fak koltuklu termoplastik malzemeler -SGV\"\/><\/figure>\n<\/div>\n\n\n<p>Polimer t\u00fcr\u00fc K\u0131saltma Yayg\u0131n Ticari \u0130simler<br>Politetrafloroetilen, PTFE Teflon, Hostaflon, Fluon<br>Etilen tetrafloroetilen, ETFE Tefzel<br>Poliklorotriflororetilen, PCTFE Kel-F, Aclon<br>Etilen Klorotrifloroetilen, ECTFE Halar<br>Perfloroalkoksi, PFA Teflon<br>Perflorlu etilen propilen, FEP Teflon, Neoflon<br>Poliamid \u2013 Naylon PAM Ultramid, Maranil, Nylatron<br>Poliamid imid, PAI Torlon, Vespel<br>Polieter eter keton, PEEK Victrex, Arlon<br>Polifenilen s\u00fclf\u00fcr, PPS Ryton, Fortron, Supec<br>Polieter s\u00fclfon, PES, Victrex<br>Polioksimetilen asetal kopolimer, POM Kemetal, Delrin, Ultraform<br>Ultra y\u00fcksek molek\u00fcler a\u011f\u0131rl\u0131kl\u0131 polietilen, UHMWPE, Hostalen<\/p>\n\n\n\n<p>Genel olarak bu malzemeler birka\u00e7 jenerik gruba ayr\u0131labilir: Floropolimerler \u2013 PTFE, PCTFE, ECTFE vb. gibi polimerler, esas olarak tetrafloroetilen ve \u00e7e\u015fitli kloro t\u00fcrevlerinden t\u00fcretilen florlanm\u0131\u015f hidrokarbon zincir polimerlerine dayanmaktad\u0131r.<\/p>\n\n\n\n<p>Fenol t\u00fcrevi polimerler \u2013 PEEK, PES ve PPS gibi do\u011frusal polimerler oksijen, k\u00fck\u00fcrt ve karbonla birlikte fenilen gruplar\u0131n\u0131 i\u00e7erir.<\/p>\n\n\n\n<p>Poliamidler \u2013 Naylonlar ve PAI gibi polimerler -NH-(C=O)- grubunu i\u00e7erir. \uf0b7 Poliolefinler \u2013 Polietilen ve polipropilen gibi hidrokarbon zincir polimerleri.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-mechanical-properties\"><strong>Mekanik \u00f6zellikler &nbsp;<\/strong><\/h2>\n\n\n\n<p>Termoplastik malzemeler elastomerlerden temel olarak bir\u00e7ok azalt\u0131lm\u0131\u015f elastik kapasiteye sahip olmalar\u0131 ve 5 ila 10% veya daha fazla gerilime maruz kald\u0131klar\u0131nda kal\u0131c\u0131 deformasyona u\u011framalar\u0131 bak\u0131m\u0131ndan farkl\u0131l\u0131k g\u00f6sterir (bkz. kau\u00e7uklar\u0131n uzamas\u0131, 70 ila 700% aras\u0131nda olabilir).<\/p>\n\n\n\n<p>Bu malzemelerin mekanik \u00f6zellikleri olduk\u00e7a de\u011fi\u015fkendir ve bunlar\u0131n ba\u015far\u0131l\u0131 bir \u015fekilde uygulanmas\u0131 uygun malzeme se\u00e7imine ba\u011fl\u0131d\u0131r. Temelde, bir malzemenin mekanik \u00f6zelliklerinin d\u00fczeyi, o malzemenin ba\u015far\u0131l\u0131 bir \u015fekilde kullan\u0131labilece\u011fi bas\u0131nc\u0131 y\u00f6netir. Mukavemet \u00f6zellikleri s\u0131cakl\u0131kla birlikte her zaman d\u00fc\u015ft\u00fc\u011f\u00fc i\u00e7in, bir valf uygulamas\u0131ndaki yumu\u015fak yuva malzemesinin bas\u0131n\u00e7 derecesi de s\u0131cakl\u0131k artt\u0131k\u00e7a azalacakt\u0131r.<\/p>\n\n\n\n<p>Termoplastiklerin y\u00fcksek s\u0131cakl\u0131klarda bas\u0131n\u00e7 \u00f6zelliklerini geni\u015fletmek i\u00e7in, mukavemeti ve sertli\u011fi artt\u0131rmak amac\u0131yla s\u0131kl\u0131kla cam veya karbon fiber gibi takviye edici dolgu maddeleri ile harmanlan\u0131rlar. S\u00fcrt\u00fcnmeyi azaltmak ve valf torkunu kontrol etmek i\u00e7in grafit, MoS2 veya PTFE gibi di\u011fer dolgu maddeleri eklenebilir.<\/p>\n\n\n\n<p>Tablo 2, yumu\u015fak valf yuvalar\u0131 olarak kullan\u0131lan i\u015flenmemi\u015f ve doldurulmu\u015f termoplastik polimerlerin tipik mekanik \u00f6zelliklerini g\u00f6stermektedir.<\/p>\n\n\n\n<p>Tablo 2 Termoplastik valf yuvas\u0131 malzemelerinin mekanik \u00f6zellikleri<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2021\/12\/20211227100912-61c990c8b44c2.jpg\" alt=\"\" class=\"wp-image-294\" title=\"Termoplastik valf yuvas\u0131 malzemelerinin mekanik \u00f6zellikleri-SGV\"\/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>Kimyasal diren\u00e7<\/strong><\/h2>\n\n\n\n<p>Termoplastik malzemeler genellikle m\u00fckemmel kimyasal diren\u00e7 g\u00f6sterir. Bununla birlikte, kimyasal inertlik derecesi ile mekanik \u00f6zellikler aras\u0131nda bir denge vard\u0131r; biri di\u011ferinin pahas\u0131na iyile\u015ftirilebilir; \u00f6rne\u011fin PTFE, kimyasal olarak en inert olan\u0131d\u0131r ancak daha d\u00fc\u015f\u00fck mekanik \u00f6zelliklere sahiptir.<\/p>\n\n\n\n<p>Dikkat edilmesi gereken birka\u00e7 nokta daha var. Florokarbon malzemeler \u00e7ok d\u00fc\u015f\u00fck su emme \u00f6zelli\u011fine sahipken, di\u011fer malzemelerin bir\u00e7o\u011fu, \u00f6zellikle de naylonlar, olduk\u00e7a b\u00fcy\u00fck miktarlarda nemi emer. Belirli malzemelere sald\u0131ran belirli kimyasal t\u00fcrleri de vard\u0131r: asitler PEEK ve POM&#039;u etkiler; aromatikler ECTFE&#039;yi etkiler; eterler ve esterler ECTFE ve PCTFE&#039;yi etkiler; alkaliler PAI ve POM&#039;u etkiler.<\/p>\n\n\n\n<p>Tablo 3, yumu\u015fak koltuklar olarak kullan\u0131lan termoplastik malzemelerin her birinin ola\u011fan\u00fcst\u00fc \u00f6zelliklerinin bir \u00f6zetidir.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2021\/12\/20211227100912-61c990c8b7fd9.jpg\" alt=\"\" class=\"wp-image-293\" title=\"Termoplastik malzemelerin kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131-SGV\"\/><\/figure>\n<\/div>\n\n\n<p>Polimer Avantajlar\u0131 Dezavantajlar\u0131<br>PTFE Ola\u011fan\u00fcst\u00fc kimyasal diren\u00e7 D\u00fc\u015f\u00fck s\u00fcrt\u00fcnme Y\u00fcksek operasyonel Tmax D\u00fc\u015f\u00fck sertlik, mukavemet ve sertlik<br>ETFE \u0130yi s\u00fcr\u00fcnme, \u00e7ekme ve a\u015f\u0131nma \u00f6zellikleri Pahal\u0131 Sald\u0131r\u0131ya u\u011frayanlar: esterler, aromatikler<br>PCTFE PTFE&#039;den Daha Serttir \u00c7ok pahal\u0131 Sald\u0131r\u0131ya u\u011frayanlar: esterler, eterler ve halojenlenmi\u015f hidrokarbonlar<br>ECTFE \u0130yi s\u00fcr\u00fcnme, \u00e7ekme ve a\u015f\u0131nma \u00f6zellikleri Pahal\u0131 Sald\u0131r\u0131ya u\u011frayanlar: esterler, aromatikler<br>PFA Floroplastiklerin en y\u00fcksek Tmax&#039;\u0131 \u00c7ok pahal\u0131 D\u00fc\u015f\u00fck sertlik, mukavemet ve sertlik<br>FEP \u0130yi kimyasal diren\u00e7 D\u00fc\u015f\u00fck sertlik, mukavemet ve sertlik<br>PAM 6, 6\/6 ve 6\/12 \u0130yi a\u015f\u0131nma direnci \u0130yi Mukavemet Y\u00fcksek su adsorpsiyonu<br>PAM 11 ve 12 Daha d\u00fc\u015f\u00fck su adsorpsiyonu 6&#039;l\u0131 PAI&#039;ye g\u00f6re daha d\u00fc\u015f\u00fck mukavemet ve \u0131s\u0131 direnci En g\u00fc\u00e7l\u00fc dolgusuz plastik \u0130yi a\u015f\u0131nma direnci \u00c7ok pahal\u0131 Alkalilerin sald\u0131r\u0131s\u0131na u\u011frar<br>PEEK Y\u00fcksek Tmax \u0130yi kimyasal diren\u00e7 \u00c7ok pahal\u0131 Asitlerin sald\u0131r\u0131s\u0131na u\u011frar<br>PPS Y\u00fcksek Tmax \u0130yi kimyasal diren\u00e7<br>PES Y\u00fcksek Tmax Y\u00fcksek su adsorpsiyonu<br>POM Sa\u011flam ve sert A\u015f\u0131nma, s\u00fcr\u00fcnme ve kimyasallara kar\u015f\u0131 iyi diren\u00e7 Asit ve alkalilere kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r<br>UHMWPE \u0130yi a\u015f\u0131nma ve kimyasal diren\u00e7 D\u00fc\u015f\u00fck Tma<\/p>\n\n\n\n<!-- Andy:h-related-tags -->\n<h2 id=\"h-related-tags\">\u0130lgili Etiketler :<\/h2>\n<!-- \/Andy:h-related-tags -->\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/\">ZECO Valf<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/difference-between-gate-valves-and-ball-valves.html\/\">S\u00fcrg\u00fcl\u00fc Vana vs K\u00fcresel Vana<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html\/\">NBR Kelebek Vana<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/advantages-and-disadvantages-of-globe-valves.html\/\">Glob Vana Nedir?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/gate-valve-problems.html\/\">S\u00fcrg\u00fcl\u00fc Vana Onar\u0131m\u0131<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/what-is-an-axial-flow-silent-check-valve.html\/\">Eksenel \u00c7ekvalf Nedir<\/a>\n\n<\/div>\n\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/urun\/manual-gate-valve\/\">Manuel Kumandal\u0131 S\u00fcrg\u00fcl\u00fc Vana \u00dcreticisi<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/the-function-of-globe-valve-in-pipeline-system.html\/\">Glob Vanalar Nedir?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/difference-between-gate-valve-and-butterfly-valve.html\/\">S\u00fcrg\u00fcl\u00fc Vana ve Kelebek Vana Aras\u0131ndaki Fark<\/a>\n\n<\/div>\n\n\n\n<p>\u00d6ncesi ve sonras\u0131yla on makale<\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/ip-code-ingress-protection-ratingsvalve-actuator.html\/\">IP kodu \u2013 Giri\u015f Koruma De\u011ferleri (vana akt\u00fcat\u00f6r\u00fc)<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/wafer-type-double-disc-piston-lift-check-valve-installation-operation-and-maintenance-manual.html\/\">Wafer Tip \u00c7ift Diskli\/Pistonlu Kald\u0131rma \u00c7ekvalf-Montaj, Kullan\u0131m ve Bak\u0131m K\u0131lavuzu<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/valve-price-doesnt-mean-everything.html\/\">Valve Fiyat\u0131 Her \u015eey Anlam\u0131na Gelmiyor<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/aker-solutions-wins-heidrun-platform-equipment-frame-agreement.html\/\">Aker Solutions, Heidrun platform ekipman\u0131 \u00e7er\u00e7eve anla\u015fmas\u0131n\u0131 kazand\u0131<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/china-and-main-country-valve-welding-materialelectrode-for-sealing-surface.html\/\">\u00c7in ve ana \u00fclke S\u0131zd\u0131rmazl\u0131k y\u00fczeyi i\u00e7in Vana Kaynak malzemesi (elektrot)<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/globe-valve-installationoperation-and-maintenance-manual.html\/\">Glob Vana Montaj, Kullan\u0131m ve Bak\u0131m K\u0131lavuzu<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/ball-valves-installation-operation-and-maintenance-manual.html\/\">K\u00fcresel Vanalar Montaj, \u00c7al\u0131\u015ft\u0131rma ve Bak\u0131m K\u0131lavuzu<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/gate-valves.html\/\">S\u00fcrg\u00fcl\u00fc vana<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/application-of-advanced-technology-in-the-domestic-large-pipeline-valveall-welded-ball-valve.html\/\">Yerli b\u00fcy\u00fck boru hatt\u0131 vanas\u0131nda ileri teknolojinin uygulanmas\u0131: tamam\u0131 kaynakl\u0131 k\u00fcresel vana<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/tr\/butterfly-valve-specification.html\/\">Kelebek Vana \u015eartname<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Valflerde \u00e7ok say\u0131da termoplastik malzeme, \u00f6zellikle k\u00fcresel valf uygulamalar\u0131 i\u00e7in yumu\u015fak yatak se\u00e7enekleri olarak sunulmaktad\u0131r. Ayr\u0131ca astarl\u0131 vanalar gibi\u2026 <a title=\"K\u00fcresel Vana Yuvas\u0131 olarak termoplastik malzemeler\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/tr\/thermoplastic-materials-as-valve-seat.html\" aria-label=\"K\u00fcresel Vana Yuvas\u0131 olarak Termoplastik malzemeler hakk\u0131nda daha fazla bilgi\">Daha fazla bilgi edinin<\/a><\/p>","protected":false},"author":2,"featured_media":15947,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[1],"tags":[1994,1957,1814,1997,1998,1995,1993,1996,1999,3235],"class_list":["post-1037","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-ball-valve-seat","tag-butterfly-valve","tag-butterfly-valve-seat","tag-pctfe-valve-seat","tag-pctfe-valve-seat-manufacturer","tag-peek-valve-seat-material","tag-valve-seat","tag-valve-seat-material","tag-valve-seat-materials","tag-valve-seat-rings","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"featured_image_src_large":["https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/PEEK.png",884,606,false],"author_info":{"display_name":"Jerry","author_link":"https:\/\/zecovalve.com\/tr\/author\/jerry"},"comment_info":0,"category_info":[{"term_id":1,"name":"Uncategorized","slug":"uncategorized","term_group":0,"term_taxonomy_id":1,"taxonomy":"category","description":"","parent":0,"count":452,"filter":"raw","cat_ID":1,"category_count":452,"category_description":"","cat_name":"Uncategorized","category_nicename":"uncategorized","category_parent":0}],"tag_info":[{"term_id":1994,"name":"ball valve seat","slug":"ball-valve-seat","term_group":0,"term_taxonomy_id":1994,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1957,"name":"butterfly valve","slug":"butterfly-valve","term_group":0,"term_taxonomy_id":1957,"taxonomy":"post_tag","description":"","parent":0,"count":30,"filter":"raw"},{"term_id":1814,"name":"butterfly valve seat","slug":"butterfly-valve-seat","term_group":0,"term_taxonomy_id":1814,"taxonomy":"post_tag","description":"","parent":0,"count":2,"filter":"raw"},{"term_id":1997,"name":"PCTFE Valve Seat","slug":"pctfe-valve-seat","term_group":0,"term_taxonomy_id":1997,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_9e7b7b-8a\"} \/-->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET PCTFE VALVE SEAT PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-pctfe-material\">What is PCTFE Material?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE (Polychlorotrifluoroethylene) PCTFE (Polychlorotrifluoroethylene) is a homopolymer of Chlorotrifluoroethylene. PCTFE is a unique fluoropolymer that is capable of maintaining its physical properties at exceptionally low operating temperatures.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE has excellent chemical resistance, radiation resistance, and flammability characteristics. The material has a useful temperature range of -400\u00b0F to 380\u00b0F. PCTFE is resistant to cold flow and it has the lowest coefficient of thermal expansion of any unfilled fluoropolymer. These characteristics make it an excellent choice when dimensional stability is critical.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE is often used for aerospace applications when chemical resistance, a broad operating temperature range, and low flammability are required. It is also extensively used for cryogenic valve applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Key Properties of PCTFE Material<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Dimensionally stable, rigid, and resistant to cold flow<\/li>\r\n \t<li>Very low gas permeation and outgassing<\/li>\r\n \t<li>Near zero moisture absorption<\/li>\r\n \t<li>Excellent chemical resistance<\/li>\r\n \t<li>High compression strength<\/li>\r\n \t<li>Low deformation under load<\/li>\r\n \t<li>Non-flammable<\/li>\r\n \t<li>Temperature range: -400\u00b0 to 380\u00b0F<\/li>\r\n \t<li>Radiation Resistance<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:table {\"className\":\"is-style-stripes\"} -->\r\n<figure class=\"wp-block-table is-style-stripes\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<td>Property<\/td>\r\n<td>Value<\/td>\r\n<td>Units<\/td>\r\n<td>Method<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Tensile Strength<\/td>\r\n<td>4860 - 5710\r\n34 - 39<\/td>\r\n<td>psi\r\nMPa<\/td>\r\n<td>D 638<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Elongation<\/td>\r\n<td>100 - 250<\/td>\r\n<td>%<\/td>\r\n<td>D 638<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Flexural Strength, 73\u00b0F<\/td>\r\n<td>9570 - 10300\r\n66 - 71<\/td>\r\n<td>psi\r\nMPa<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Flex Modulus<\/td>\r\n<td>200 \u2013 243 x 103\r\n1.4 \u2013 1.7<\/td>\r\n<td>psi\r\nMPa<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Impact Strength, Izod, 23 deg C<\/td>\r\n<td>2.5 \u2013 3.5<\/td>\r\n<td>ft-lb\/in<\/td>\r\n<td>D 256<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Compressive Stress at 1% deformation,<\/td>\r\n<td>1570 \u2013 1860\r\n11 - 13<\/td>\r\n<td>psi\r\nMPa<\/td>\r\n<td>D 695<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Density<\/td>\r\n<td>2.10 to 2.17<\/td>\r\n<td>gm\/cu.cm<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Coefficient of Linear Expansion<\/td>\r\n<td>7 x 10-5<\/td>\r\n<td>K-1<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Melting Point<\/td>\r\n<td>410 -414\r\n210 - 212<\/td>\r\n<td>deg F\r\ndeg C<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Thermal Conductivity<\/td>\r\n<td>1.45\r\n0.84<\/td>\r\n<td>Btu\u00b7in\/h\u00b7ft2\u00b7\u00b0F\r\nW\/m\u00b7K<\/td>\r\n<td>ASTM C 177<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Specific Heat<\/td>\r\n<td>0.22\r\n0.92<\/td>\r\n<td>Btu\/lb\/deg F\r\nkJ\/Kg\/deg K<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Heat Distortion Temperature, 66 lb\/sq.in (0.455 MPa)<\/td>\r\n<td>259\r\n126<\/td>\r\n<td>deg F\r\ndeg C<\/td>\r\n<td>D 648<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Processing Temperature<\/td>\r\n<td>620\r\n327<\/td>\r\n<td>deg F\r\ndeg C<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Dielectric Strength, short time, 0.004\u201d<\/td>\r\n<td>3000<\/td>\r\n<td>Volt\/mil<\/td>\r\n<td>D 149<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Arc-Resistance<\/td>\r\n<td>360<\/td>\r\n<td>sec<\/td>\r\n<td>D 495<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Volume Resistivity, @ 50% RH<\/td>\r\n<td>2 x 1017<\/td>\r\n<td>ohm-cm<\/td>\r\n<td>D 257<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Surface Resistivity, @ 100% RH<\/td>\r\n<td>1 x 1015<\/td>\r\n<td>Ohm sq-1<\/td>\r\n<td>D 257<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Dielectric Constant, 1 kHz<\/td>\r\n<td>2.6<\/td>\r\n<td>\u03b5<\/td>\r\n<td>D150-81<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Dissipation Factor, @ 1 kHz<\/td>\r\n<td>0.02<\/td>\r\n<td><\/td>\r\n<td>D150-81<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Water Absorption<\/td>\r\n<td>0.00<\/td>\r\n<td>% increase in weight<\/td>\r\n<td>D570-81<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Flame Rating+<\/td>\r\n<td>Non-flammable<\/td>\r\n<td><\/td>\r\n<td>D 635<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Coefficient of friction<\/td>\r\n<td><\/td>\r\n<td><\/td>\r\n<td>D 1894<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Specific Gravity<\/td>\r\n<td>2.10 to 2.17<\/td>\r\n<td><\/td>\r\n<td>D792<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Moisture Permeability Constant<\/td>\r\n<td>0.2<\/td>\r\n<td>g\/m, 24 hours<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>O2\u00a0Permeability<\/td>\r\n<td>1.5 x 10-10<\/td>\r\n<td>Cc, cm\/sq.cm, sec, atm<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>N2\u00a0Permeability<\/td>\r\n<td>0.18 x 10-10<\/td>\r\n<td>Cc, cm\/sq.cm, sec, atm<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>CO2\u00a0Permeability<\/td>\r\n<td>2.9 x 10-10<\/td>\r\n<td>Cc, cm\/sq.cm, sec, atm<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:heading -->\r\n<h2>PCTFE Valve Seat<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nBall valve seats that show signs of swelling, blistering, or \u201cpopcorning\u201d have been permeated at a molecular level. Needless to say, this can cause some serious issues such as leaks and catastrophic failure. The solution is to find a ball valve seat material that is highly resistant to permeation and an excellent choice would be PCTFE. In this week\u2019s blog post, we will talk about PCTFE Ball Valve Seats and how they are used in Low Permeation Applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOne of the best materials for a ball valve seat application where permeability is a problem would be PCTFE (Polychlorotrifluoroethylene), a thermoplastic chlorofluoropolymer. PCTFE is sometimes referred to as Modified PTFE or PCTFE, as well as by trade names Kel-F, Voltalef, and Neoflon. PCTFE is often thought of as a second-generation PTFE material that maintains the chemical and thermal resistance of PTFE along with its low friction. It is also similar to other fluoropolymers such as PFA or FEP.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOne of the defining characteristics of PCTFE is that it has a much more dense molecular structure and a low void and micro-porosity content when compared to similar ball valve seat materials. This gives it a very low permeability coefficient, which means that the likelihood of it swelling or popcorning is far lower than other materials. For example, its permeability for O2, N2, CO2, and H2 are 1.5 x 10-10, 0.18 x 10-10, 2.9 x 10-10, and 56.4 x 10-10 darcy, respectively.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE also provides improved toughness and strength along with good deformation recovery and excellent creep and cold-flow resistance. In addition, it has a wide operating temperature range of -100\u00b0F to 500\u00b0F. In fact, it performs extremely well at cryogenic temperatures. Because of its low friction, it also results in a very low ball valve operating torque. PCTFE also exhibits zero moisture absorption and is non-wetting.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE works well in operating environments where other polymers may fail. For example, it is well adapted to nuclear service that may involve high radiation exposure, is non-flammable (D 635), and is resistant to attack by the vast majority of chemicals and oxidizing agents. The only chemicals that might lead to slight swelling are ethers, esters, aromatic solvents, and halocarbon compounds.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":4,"filter":"raw"},{"term_id":1998,"name":"PCTFE Valve Seat Manufacturer","slug":"pctfe-valve-seat-manufacturer","term_group":0,"term_taxonomy_id":1998,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_7bd7e9-a7\"} \/-->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET PCTFE VALVE SEAT PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-pctfe\">What is PCTFE?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE(Polychlorotrifluoroethylene) is a fluorocarbon-based polymer. It offers a unique combination of physical and mechanical properties, nonflammability, and low permeation capability to moisture and steam atmosphere compared to other plastics. The heat resistance and chemical resistance capability are less than PFA and FEP, however, mechanical characteristics(especially hardness) are superior. It is suitable for utilizing in the temperature range of -200\u2103\uff5e150\u2103, especially for cryogenic applications such as oxygen, hydrogen, nitrogen, and more. PCTFE has a very strong resistance performance to low temperatures.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Property List of PCTFE<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:table {\"className\":\"is-style-stripes\"} -->\r\n<figure class=\"wp-block-table is-style-stripes\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<td><strong>Item<\/strong><\/td>\r\n<td><strong>Color<\/strong><\/td>\r\n<td><strong>Density<\/strong><\/td>\r\n<td><strong>Hardness<\/strong><\/td>\r\n<td><strong>Compressive strength<\/strong><\/td>\r\n<td><strong>Long-term Temp.<\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Units<\/td>\r\n<td><\/td>\r\n<td>g\/cm3<\/td>\r\n<td>Shore D<\/td>\r\n<td>Mpa<\/td>\r\n<td>\u2103<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Value<\/td>\r\n<td>Translucent<\/td>\r\n<td>2.13<\/td>\r\n<td>75-85<\/td>\r\n<td>80<\/td>\r\n<td>-80~115<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:heading -->\r\n<h2><strong><a href=\"https:\/\/zecovalve.com\/product-category\/ball-valve\"><mark class=\"has-inline-color has-contrast-2-color\" style=\"background-color: var(--base)\">Ball Valve<\/mark><\/a><\/strong> Seats<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSeats and inserts, which are important components in the valve industry, are critical components, PTFE is very often chosen as the raw material. PTFE provides a low-friction seat, with excellent media compatibility. Filled grades provide wear resistance and can support seating loads of the higher class of valves.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2><strong><mark class=\"has-inline-color has-contrast-2-color\" style=\"background-color: var(--base)\"><a href=\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\">Butterfly Valve<\/a><\/mark><\/strong> Seats<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPTFE is one of the Butterfly Valve Seat Materials. PTFE Butterfly Valve Seats Are Available in Pure or Reinforced PTFE to Meet Specific Requirements for Different Working Environments.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPTFE Seats' Excellent Chemical Resistance, High-Temperature Resistance, Self-lubrication, and Low Friction Properties of PTFE Make It a General Material for Valve Seats.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>VALVE SEAT MATERIAL SELECTION<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:table {\"className\":\"is-style-stripes\"} -->\r\n<figure class=\"wp-block-table is-style-stripes\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<th class=\"has-text-align-center\" data-align=\"center\">Material Name<\/th>\r\n<th>Main Properties<\/th>\r\n<th>Notes<\/th>\r\n<th>Temperature Range<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">VIRGIN PTFE<\/td>\r\n<td>Very low coefficient of friction and excellent chemical resistance.<\/td>\r\n<td>FDA approved<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">15% Glass Filled PTFE<\/td>\r\n<td>Decreased compressive strength and lower deformation under load than virgin PTFE.<\/td>\r\n<td>Abrasive material<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">25% Glass Filled PTFE<\/td>\r\n<td>Similar to 15% Glass better wear resistance, higher compressive strength, and lower deformation under load.<\/td>\r\n<td>Abrasive material<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel Filled PTFE<\/td>\r\n<td>Extremely hard-wearing. Excellent strength and stability under extreme loads and elevated temperatures.<\/td>\r\n<td>Can be used in steam and thermal fluid applications<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">TFM<\/td>\r\n<td>Much denser polymer structure than Virgin PTFE. Displays better stress recovery.<\/td>\r\n<td>Modified TFE Polymer<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Carbon Graphite filled TFM<\/td>\r\n<td>Lower thermal expansion-contraction rate than conventional TFM.<\/td>\r\n<td>Ideal for use in steam and thermal fluid applications<\/td>\r\n<td>-40\u00b0C to 260\u00b0C and even 320\u00b0C on Thermal Fluid applications<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">UHMWPE<\/td>\r\n<td>Highly resistant to corrosive chemicals, with the exception of oxidizing acids and organic solvents.<\/td>\r\n<td>Also known as High Modulus Polyethylene (HMPE) or High-Performance Polyethylene (HPPE)<\/td>\r\n<td>-40\u00b0C to +80\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">PCTFE<\/td>\r\n<td>Excellent for cryogenic and Oxygen use.<\/td>\r\n<td>A homo-polymer of Chlorotrifluoroethylene<\/td>\r\n<td>-270\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Virgin PEEK 450G<\/td>\r\n<td>Excellent chemical resistance and mechanical properties at elevated temperatures.<\/td>\r\n<td>An organic polymer thermoplastic<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Carbon Filled PEEK<\/td>\r\n<td>Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high-load situations.<\/td>\r\n<td>Low coefficient of friction and suitable for many extremely corrosive applications<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">PEEK HT<\/td>\r\n<td>Retains all key features and benefits of PEEK 450G but retains physical properties to a higher temperature.<\/td>\r\n<td>Can be supplied in both virgins unfilled or as-filled compounded material<\/td>\r\n<td>up to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Acetal and Delrin<\/td>\r\n<td>Displays good resistance to wear and deformation under load.<\/td>\r\n<td>Excellent for valve seat applications<\/td>\r\n<td>up to 80\u00b0C<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->","parent":0,"count":5,"filter":"raw"},{"term_id":1995,"name":"peek valve seat material","slug":"peek-valve-seat-material","term_group":0,"term_taxonomy_id":1995,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1993,"name":"valve seat","slug":"valve-seat","term_group":0,"term_taxonomy_id":1993,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1996,"name":"valve seat material","slug":"valve-seat-material","term_group":0,"term_taxonomy_id":1996,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1999,"name":"valve seat materials","slug":"valve-seat-materials","term_group":0,"term_taxonomy_id":1999,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":3235,"name":"Valve Seat Rings","slug":"valve-seat-rings","term_group":0,"term_taxonomy_id":3235,"taxonomy":"post_tag","description":"<!-- wp:paragraph -->\r\n\r\nThe Valve seat or seat ring is used to support the valve plug or disc in a fully closed position and to form a sealing part. Usually, the valve seat diameter is the maximum flow diameter of the valve. The seat material is very wide, all kinds of rubber, plastic, and metal materials can be used as seat material, such as EPDM, NBR, NR, PTF.E, PEEK, PFA, SS315, STELLITE, and so on\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_6f889b-ad\"} \/-->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET VALVE SEAT RINGS PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor the butterfly valve, the seat material usually are rubbers, such as EPDM, NBR, NR (Natural hard rubber)\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor the ball valve and plug valve the seat material usually is plastics, such as PTFE, PEEK, and so on.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor the globe valve and gate valve the seat material usually is metal to metal.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor valves using soft seat material, their shut-off performance is great and even can reach zero bubble seat tightness. while the disadvantaged part is they can not resist high temperature and high-pressure applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOn the other hand, those valve's seat material is metal to metal therefore they can stand with high-pressure ratings up to 2500LB.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-types-of-seat-rings\">Types of Seat Rings<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Soft Seat (Nonmetallic Seat Ring)<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe majority of valves have soft seat inserts and elastomer or polymer seals. The nonmetallic seat ring is made from e.g. Teflon. The ring is held against the ball by an insert. For fire-safe service, a secondary metal-to-metal seating arrangement is required to omit leakage in the event that the soft seat material is lost during a fire. Soft seated valves are recommended for clean service only and are unsuitable for dirty\/abrasive service or high temperatures.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Double Beveled Sealing Ring<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe structure design of a double-beveled sealing ring has been adopted to reduce the friction between the ball and the sealing ring to achieve lower operating torque. When the medium pressure is low, the ball has a smaller contacting surface with a sealing ring, which introduces higher sealing pressure to ensure the sealing reliability. When the medium pressure gets higher, the contacting area between the ball and the sealing ring increases accordingly. A larger contact area reduces the sealing pressure to avoid the deformation of the sealing ring.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Cantilevered lips seat rings<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSeat rings with cantilevered lips are designed so that the ball contacts initially only the tip of the lip. As the upstream and downstream seats are pre-stressed on an assembly against the ball, the lips de\ufb02ect and put the seat rings into a torsion. When the valve is being closed against the line pressure, the lip of the downstream seat de\ufb02ects still further until \ufb01nally the entire seat surface matches the ball. By this design, the seats have some spring action that promotes good sealing action also at low \ufb02uid pressures. Furthermore, the resilient construction keeps the seats from being crushed at high \ufb02uid loads\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Pressure equalizing slots<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe seat ring shown is provided with peripheral slots, which are known as pressure-equalizing slots. During the closing of the valve, the maximum surge pressure occurs, during which the downstream seat can be forced to intrude into the ball port and the valve can become inoperative. The pressure equalizing slots prevents this potential failure. When pressure causes the upstream seat to move against the ball and the ball moves downstream, the pressure simply leaks into the valve body cavity through the relief slots. The upstream seat ring becomes pressure balanced. Downstream sealing prevents seat damage and lowers operating torque while providing full bidirectional capability. The seats with pressure equalizing slots also permit the valve to operate at a higher pressure differential with lower torques than double sealing valves in which there is sealing between both seats and the ball.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Soft Seat (Metallic Seat Ring)<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe metallic seat ring, containing a nonmetallic insert, usually requires spring force to achieve a tight seal. Due to springs, this design is not used in corrosive service. Even though this seat has a metal seat ring, it is categorized as a soft seated ball valve due to its use of soft material insert, which is in contact with the ball.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Metal to Metal Seats<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor services unsuitable for soft seating, metal and ceramic seating are being used. In general practice, hard metal seated ball valves (typically stellite) are only used in severe service conditions such as high temperature, high erosion, corrosion or abrasion, slurry, etc. Metal seats are generally not bubble tight. Metal seats and balls are typically lapped in matching sets resulting in perfect roundness and fitness to ensure smooth operation and tight shut-off and achieving \u2018Zero Leakage\u2019. Metal seats come in different classes of Shut Off including Class IV, V, and VI. Metal Seat and Ball are fabricated from base metals coated with hard chrome, tungsten carbide, and Stellite.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":5,"filter":"raw"}],"taxonomy_info":{"category":[{"value":1,"label":"Uncategorized"}],"post_tag":[{"value":1994,"label":"ball valve seat"},{"value":1957,"label":"butterfly valve"},{"value":1814,"label":"butterfly valve seat"},{"value":1997,"label":"PCTFE Valve Seat"},{"value":1998,"label":"PCTFE Valve Seat Manufacturer"},{"value":1995,"label":"peek valve seat material"},{"value":1993,"label":"valve seat"},{"value":1996,"label":"valve seat material"},{"value":1999,"label":"valve seat materials"},{"value":3235,"label":"Valve Seat Rings"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Thermoplastic Materials as Ball Valve Seat &amp; Butterfly Valve Seat | 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\/thermoplastic-materials-as-valve-seat.html\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Thermoplastic Materials as Ball Valve Seat &amp; Butterfly Valve Seat | ZECO\" \/>\n<meta property=\"og:description\" content=\"A large number of thermoplastic materials are offered in valves, mainly as soft-seat options for ball valve applications. 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