{"id":1997,"count":4,"description":"\r\n\r\n\r\n\r\nPCTFE VALF YATA\u011eI F\u0130YATI ALIN<\/strong><\/a>\r\n\r\n\r\n\r\n\r\n

PCTFE Malzemesi Nedir?<\/h2>\r\n\r\n\r\n\r\n\r\nPCTFE (Poliklorotrifloroetilen) PCTFE (Poliklorotrifloroetilen), Klorotrifloroetilenin bir homopolimeridir. PCTFE, ola\u011fan\u00fcst\u00fc d\u00fc\u015f\u00fck \u00e7al\u0131\u015fma s\u0131cakl\u0131klar\u0131nda fiziksel \u00f6zelliklerini koruyabilen benzersiz bir floropolimerdir.\r\n\r\n\r\n\r\n\r\n\r\nPCTFE m\u00fckemmel kimyasal dirence, radyasyon direncine ve yan\u0131c\u0131l\u0131k \u00f6zelliklerine sahiptir. Malzeme -400\u00b0F ila 380\u00b0F aras\u0131nda kullan\u0131\u015fl\u0131 bir s\u0131cakl\u0131k aral\u0131\u011f\u0131na sahiptir. PCTFE so\u011fuk ak\u0131\u015fa dayan\u0131kl\u0131d\u0131r ve herhangi bir dolgusuz floropolimer aras\u0131nda en d\u00fc\u015f\u00fck termal genle\u015fme katsay\u0131s\u0131na sahiptir. Bu \u00f6zellikler, boyutsal kararl\u0131l\u0131\u011f\u0131n kritik oldu\u011fu durumlarda onu m\u00fckemmel bir se\u00e7im haline getirir.\r\n\r\n\r\n\r\n\r\n\r\nPCTFE genellikle kimyasal direncin, geni\u015f bir \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 aral\u0131\u011f\u0131n\u0131n ve d\u00fc\u015f\u00fck yan\u0131c\u0131l\u0131\u011f\u0131n gerekli oldu\u011fu havac\u0131l\u0131k uygulamalar\u0131nda kullan\u0131l\u0131r. Ayr\u0131ca kriyojenik valf uygulamalar\u0131nda da yayg\u0131n olarak kullan\u0131lmaktad\u0131r.\r\n\r\n\r\n\r\n\r\n

PCTFE Malzemesinin Temel \u00d6zellikleri<\/h2>\r\n\r\n\r\n\r\n
    \r\n \t
  • Boyutsal olarak kararl\u0131, sert ve so\u011fuk ak\u0131\u015fa dayan\u0131kl\u0131<\/li>\r\n \t
  • \u00c7ok d\u00fc\u015f\u00fck gaz ge\u00e7irgenli\u011fi ve gaz \u00e7\u0131k\u0131\u015f\u0131<\/li>\r\n \t
  • S\u0131f\u0131ra yak\u0131n nem emilimi<\/li>\r\n \t
  • M\u00fckemmel kimyasal diren\u00e7<\/li>\r\n \t
  • Y\u00fcksek s\u0131k\u0131\u015ft\u0131rma mukavemeti<\/li>\r\n \t
  • Y\u00fck alt\u0131nda d\u00fc\u015f\u00fck deformasyon<\/li>\r\n \t
  • Yan\u0131c\u0131 de\u011fil<\/li>\r\n \t
  • S\u0131cakl\u0131k aral\u0131\u011f\u0131: -400\u00b0 ila 380\u00b0F<\/li>\r\n \t
  • Radyasyon Direnci<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
    \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    M\u00fclk<\/td>\r\nDe\u011fer<\/td>\r\nBirimler<\/td>\r\nY\u00f6ntem<\/td>\r\n<\/tr>\r\n
    Gerilme direnci<\/td>\r\n4860 - 5710\r\n34 - 39<\/td>\r\npsi\r\nMPa<\/td>\r\nD638<\/td>\r\n<\/tr>\r\n
    Uzama<\/td>\r\n100 - 250<\/td>\r\n%<\/td>\r\nD638<\/td>\r\n<\/tr>\r\n
    E\u011filme Dayan\u0131m\u0131, 73\u00b0F<\/td>\r\n9570 - 10300\r\n66 - 71<\/td>\r\npsi\r\nMPa<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Esneklik Mod\u00fcl\u00fc<\/td>\r\n200 \u2013 243 x 103\r\n1.4 \u2013 1.7<\/td>\r\npsi\r\nMPa<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Darbe Dayan\u0131m\u0131, Izod, 23 derece C<\/td>\r\n2,5 \u2013 3,5<\/td>\r\nft-lb\/in\u00e7<\/td>\r\nD 256<\/td>\r\n<\/tr>\r\n
    1% deformasyonunda Bas\u0131n\u00e7 Gerilmesi,<\/td>\r\n1570 \u2013 1860\r\n11 - 13<\/td>\r\npsi\r\nMPa<\/td>\r\nD 695<\/td>\r\n<\/tr>\r\n
    Yo\u011funluk<\/td>\r\n2,10 ila 2,17<\/td>\r\ngm\/cu.cm<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Do\u011frusal Geni\u015fleme Katsay\u0131s\u0131<\/td>\r\n7x10-5<\/td>\r\nK-1<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Erime noktas\u0131<\/td>\r\n410 -414\r\n210 - 212<\/td>\r\ndeg F\r\ndeg C<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Termal iletkenlik<\/td>\r\n1.45\r\n0.84<\/td>\r\nBtu\u00b7in\/h\u00b7ft2\u00b7\u00b0F\r\nW\/m\u00b7K<\/td>\r\nASTM C177<\/td>\r\n<\/tr>\r\n
    \u00d6z\u0131s\u0131<\/td>\r\n0.22\r\n0.92<\/td>\r\nBtu\/lb\/deg F\r\nkJ\/Kg\/deg K<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Is\u0131 Bozulma S\u0131cakl\u0131\u011f\u0131, 66 lb\/in\u00e7 kare (0,455 MPa)<\/td>\r\n259\r\n126<\/td>\r\ndeg F\r\ndeg C<\/td>\r\nD 648<\/td>\r\n<\/tr>\r\n
    \u0130\u015fleme S\u0131cakl\u0131\u011f\u0131<\/td>\r\n620\r\n327<\/td>\r\ndeg F\r\ndeg C<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Dielektrik Mukavemet, k\u0131sa s\u00fcreli, 0,004\u201d<\/td>\r\n3000<\/td>\r\nVolt\/mil<\/td>\r\nD 149<\/td>\r\n<\/tr>\r\n
    Ark Direnci<\/td>\r\n360<\/td>\r\nsaniye<\/td>\r\nD 495<\/td>\r\n<\/tr>\r\n
    Hacim Direnci, @ 50% RH<\/td>\r\n2x1017<\/td>\r\nohm-cm<\/td>\r\nD 257<\/td>\r\n<\/tr>\r\n
    Y\u00fczey Direnci, @ 100% RH<\/td>\r\n1x1015<\/td>\r\nOhm kare-1<\/td>\r\nD 257<\/td>\r\n<\/tr>\r\n
    Dielektrik Sabiti, 1 kHz<\/td>\r\n2.6<\/td>\r\n\u03b5<\/td>\r\nD150-81<\/td>\r\n<\/tr>\r\n
    Da\u011f\u0131l\u0131m Fakt\u00f6r\u00fc, @ 1 kHz<\/td>\r\n0.02<\/td>\r\n<\/td>\r\nD150-81<\/td>\r\n<\/tr>\r\n
    Su so\u011furumu<\/td>\r\n0.00<\/td>\r\n% a\u011f\u0131rl\u0131k art\u0131\u015f\u0131<\/td>\r\nD570-81<\/td>\r\n<\/tr>\r\n
    Alev Derecelendirmesi+<\/td>\r\nYan\u0131c\u0131 de\u011fil<\/td>\r\n<\/td>\r\nD 635<\/td>\r\n<\/tr>\r\n
    S\u00fcrt\u00fcnme katsay\u0131s\u0131<\/td>\r\n<\/td>\r\n<\/td>\r\n1894<\/td>\r\n<\/tr>\r\n
    Spesifik yer \u00e7ekimi<\/td>\r\n2,10 ila 2,17<\/td>\r\n<\/td>\r\nD792<\/td>\r\n<\/tr>\r\n
    Nem Ge\u00e7irgenli\u011fi Sabiti<\/td>\r\n0.2<\/td>\r\ng\/m, 24 saat<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    O2 Ge\u00e7irgenli\u011fi<\/td>\r\n1,5x10-10<\/td>\r\nCc, cm\/cm2, sn, atm<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    N2 Ge\u00e7irgenli\u011fi<\/td>\r\n0,18x10-10<\/td>\r\nCc, cm\/cm2, sn, atm<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    CO2 Ge\u00e7irgenli\u011fi<\/td>\r\n2,9x10-10<\/td>\r\nCc, cm\/cm2, sn, atm<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n

    PCTFE Valf Yata\u011f\u0131<\/h2>\r\n\r\n\r\n\r\n\r\n\u015ei\u015fme, kabarma veya "patlama" belirtileri g\u00f6steren k\u00fcresel vana yuvalar\u0131na molek\u00fcler d\u00fczeyde n\u00fcfuz edilmi\u015ftir. S\u00f6ylemeye gerek yok, bu durum s\u0131z\u0131nt\u0131lar ve ciddi ar\u0131zalar gibi baz\u0131 ciddi sorunlara neden olabilir. \u00c7\u00f6z\u00fcm, n\u00fcfuz etmeye kar\u015f\u0131 olduk\u00e7a diren\u00e7li bir k\u00fcresel vana yuvas\u0131 malzemesi bulmakt\u0131r ve PCTFE m\u00fckemmel bir se\u00e7im olacakt\u0131r. Bu haftaki blog yaz\u0131m\u0131zda PCTFE K\u00fcresel Vana Yuvalar\u0131ndan ve D\u00fc\u015f\u00fck Ge\u00e7irgenlik Uygulamalar\u0131nda nas\u0131l kullan\u0131ld\u0131klar\u0131ndan bahsedece\u011fiz.\r\n\r\n\r\n\r\n\r\n\r\nGe\u00e7irgenli\u011fin sorun oldu\u011fu k\u00fcresel vana yuvas\u0131 uygulamas\u0131 i\u00e7in en iyi malzemelerden biri, termoplastik bir klorofloropolimer olan PCTFE (Poliklorotrifloroetilen) olacakt\u0131r. PCTFE bazen Modifiye PTFE veya PCTFE olarak ve ayr\u0131ca Kel-F, Voltalef ve Neoflon ticari isimleriyle an\u0131l\u0131r. PCTFE genellikle PTFE'nin d\u00fc\u015f\u00fck s\u00fcrt\u00fcnmesinin yan\u0131 s\u0131ra kimyasal ve termal direncini koruyan ikinci nesil bir PTFE malzemesi olarak d\u00fc\u015f\u00fcn\u00fcl\u00fcr. Ayn\u0131 zamanda PFA veya FEP gibi di\u011fer floropolimerlere de benzer.\r\n\r\n\r\n\r\n\r\n\r\nPCTFE'nin tan\u0131mlay\u0131c\u0131 \u00f6zelliklerinden biri, benzer k\u00fcresel vana yuvas\u0131 malzemeleriyle kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda \u00e7ok daha yo\u011fun bir molek\u00fcler yap\u0131ya ve d\u00fc\u015f\u00fck bo\u015fluk ve mikro g\u00f6zeneklili\u011fe sahip olmas\u0131d\u0131r. Bu, ona \u00e7ok d\u00fc\u015f\u00fck bir ge\u00e7irgenlik katsay\u0131s\u0131 verir, bu da \u015fi\u015fme veya patlama olas\u0131l\u0131\u011f\u0131n\u0131n di\u011fer malzemelere g\u00f6re \u00e7ok daha d\u00fc\u015f\u00fck oldu\u011fu anlam\u0131na gelir. \u00d6rne\u011fin O2, N2, CO2 ve H2 ge\u00e7irgenli\u011fi s\u0131ras\u0131yla 1,5 x 10-10, 0,18 x 10-10, 2,9 x 10-10 ve 56,4 x 10-10 darcy'dir.\r\n\r\n\r\n\r\n\r\n\r\nPCTFE ayr\u0131ca iyi deformasyon geri kazan\u0131m\u0131 ve m\u00fckemmel s\u00fcr\u00fcnme ve so\u011fuk ak\u0131\u015f direncinin yan\u0131 s\u0131ra geli\u015fmi\u015f tokluk ve mukavemet sa\u011flar. Ayr\u0131ca -100\u00b0F ile 500\u00b0F aras\u0131nda geni\u015f bir \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 aral\u0131\u011f\u0131na sahiptir. Asl\u0131nda kriyojenik s\u0131cakl\u0131klarda son derece iyi performans g\u00f6sterir. D\u00fc\u015f\u00fck s\u00fcrt\u00fcnmesi nedeniyle ayn\u0131 zamanda \u00e7ok d\u00fc\u015f\u00fck k\u00fcresel vana \u00e7al\u0131\u015fma torku sa\u011flar. PCTFE ayr\u0131ca s\u0131f\u0131r nem emme \u00f6zelli\u011fi g\u00f6sterir ve \u0131slanmaz.\r\n\r\n\r\n\r\n\r\n\r\nPCTFE, di\u011fer polimerlerin ba\u015far\u0131s\u0131z olabilece\u011fi \u00e7al\u0131\u015fma ortamlar\u0131nda iyi \u00e7al\u0131\u015f\u0131r. \u00d6rne\u011fin, y\u00fcksek radyasyona maruz kalma gerektirebilecek n\u00fckleer hizmete iyi adapte edilmi\u015ftir, yan\u0131c\u0131 de\u011fildir (D 635) ve kimyasallar\u0131n ve oksitleyici maddelerin b\u00fcy\u00fck \u00e7o\u011funlu\u011funun sald\u0131r\u0131s\u0131na kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r. Hafif \u015fi\u015fmeye neden olabilecek kimyasallar eterler, esterler, aromatik \u00e7\u00f6z\u00fcc\u00fcler ve halokarbon bile\u015fikleridir.\r\n\r\n","link":"https:\/\/zecovalve.com\/tr\/tag\/pctfe-valve-seat","name":"PCTFE Valf Yata\u011f\u0131","slug":"pctfe-valve-seat","taxonomy":"post_tag","meta":[],"yoast_head":"\nPCTFE Valve Seat - PCTFE Material | ZECO Valve<\/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\/tag\/pctfe-valve-seat\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PCTFE Valve Seat - PCTFE Material | ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"GET PCTFE VALVE SEAT PRICE What is PCTFE Material? PCTFE (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. PCTFE 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. PCTFE 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. Key Properties of PCTFE Material Dimensionally stable, rigid, and resistant to cold flow Very low gas permeation and outgassing Near zero moisture absorption Excellent chemical resistance High compression strength Low deformation under load Non-flammable Temperature range: -400\u00b0 to 380\u00b0F Radiation Resistance Property Value Units Method Tensile Strength 4860 – 5710 34 – 39 psi MPa D 638 Elongation 100 – 250 % D 638 Flexural Strength, 73\u00b0F 9570 – 10300 66 – 71 psi MPa Flex Modulus 200 \u2013 243 x 103 1.4 \u2013 1.7 psi MPa Impact Strength, Izod, 23 deg C 2.5 \u2013 3.5 ft-lb\/in D 256 Compressive Stress at 1% deformation, 1570 \u2013 1860 11 – 13 psi MPa D 695 Density 2.10 to 2.17 gm\/cu.cm Coefficient of Linear Expansion 7 x 10-5 K-1 Melting Point 410 -414 210 – 212 deg F deg C Thermal Conductivity 1.45 0.84 Btu\u00b7in\/h\u00b7ft2\u00b7\u00b0F W\/m\u00b7K ASTM C 177 Specific Heat 0.22 0.92 Btu\/lb\/deg F kJ\/Kg\/deg K Heat Distortion Temperature, 66 lb\/sq.in (0.455 MPa) 259 126 deg F deg C D 648 Processing Temperature 620 327 deg F deg C Dielectric Strength, short time, 0.004\u201d 3000 Volt\/mil D 149 Arc-Resistance 360 sec D 495 Volume Resistivity, @ 50% RH 2 x 1017 ohm-cm D 257 Surface Resistivity, @ 100% RH 1 x 1015 Ohm sq-1 D 257 Dielectric Constant, 1 kHz 2.6 \u03b5 D150-81 Dissipation Factor, @ 1 kHz 0.02 D150-81 Water Absorption 0.00 % increase in weight D570-81 Flame Rating+ Non-flammable D 635 Coefficient of friction D 1894 Specific Gravity 2.10 to 2.17 D792 Moisture Permeability Constant 0.2 g\/m, 24 hours O2\u00a0Permeability 1.5 x 10-10 Cc, cm\/sq.cm, sec, atm N2\u00a0Permeability 0.18 x 10-10 Cc, cm\/sq.cm, sec, atm CO2\u00a0Permeability 2.9 x 10-10 Cc, cm\/sq.cm, sec, atm PCTFE Valve Seat Ball 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. One 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. One 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. PCTFE 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. PCTFE 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.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zecovalve.com\/tr\/tag\/pctfe-valve-seat\" \/>\n<meta property=\"og:site_name\" content=\"ZECO Valve\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/zecovalve.com\/#website\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"ZECO Valve\",\"description\":\"Industrial Ball Valve, Gate Valve and Globe Valve Manufacturer\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/zecovalve.com\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"tr\"},{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/zecovalve.com\/tag\/pctfe-valve-seat#webpage\",\"url\":\"https:\/\/zecovalve.com\/tag\/pctfe-valve-seat\",\"name\":\"PCTFE Valve Seat - PCTFE Material | ZECO Valve\",\"isPartOf\":{\"@id\":\"https:\/\/zecovalve.com\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/zecovalve.com\/tag\/pctfe-valve-seat#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/zecovalve.com\/tag\/pctfe-valve-seat\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/zecovalve.com\/tag\/pctfe-valve-seat#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"position\":2,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/tag\/pctfe-valve-seat\",\"url\":\"https:\/\/zecovalve.com\/tag\/pctfe-valve-seat\",\"name\":\"PCTFE Valve Seat\"}}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","_links":{"self":[{"href":"https:\/\/zecovalve.com\/tr\/wp-json\/wp\/v2\/tags\/1997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/tr\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/zecovalve.com\/tr\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/tr\/wp-json\/wp\/v2\/posts?tags=1997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}