{"id":1997,"count":4,"description":"\r\n\r\n\r\n\r\nOBTENIR LE PRIX DU SI\u00c8GE DE VANNE PCTFE<\/strong><\/a>\r\n\r\n\r\n\r\n\r\n

Qu'est-ce que le mat\u00e9riau PCTFE\u00a0?<\/h2>\r\n\r\n\r\n\r\n\r\nPCTFE (Polychlorotrifluoro\u00e9thyl\u00e8ne) Le PCTFE (Polychlorotrifluoro\u00e9thyl\u00e8ne) est un homopolym\u00e8re de chlorotrifluoro\u00e9thyl\u00e8ne. Le PCTFE est un fluoropolym\u00e8re unique capable de conserver ses propri\u00e9t\u00e9s physiques \u00e0 des temp\u00e9ratures de fonctionnement exceptionnellement basses.\r\n\r\n\r\n\r\n\r\n\r\nLe PCTFE pr\u00e9sente d'excellentes caract\u00e9ristiques de r\u00e9sistance chimique, de r\u00e9sistance aux radiations et d'inflammabilit\u00e9. Le mat\u00e9riau a une plage de temp\u00e9ratures utile de -400\u00b0F \u00e0 380\u00b0F. Le PCTFE r\u00e9siste \u00e0 l'\u00e9coulement \u00e0 froid et poss\u00e8de le coefficient de dilatation thermique le plus bas de tous les polym\u00e8res fluor\u00e9s non charg\u00e9s. Ces caract\u00e9ristiques en font un excellent choix lorsque la stabilit\u00e9 dimensionnelle est critique.\r\n\r\n\r\n\r\n\r\n\r\nLe PCTFE est souvent utilis\u00e9 pour les applications a\u00e9rospatiales lorsqu'une r\u00e9sistance chimique, une large plage de temp\u00e9ratures de fonctionnement et une faible inflammabilit\u00e9 sont requises. Il est \u00e9galement largement utilis\u00e9 pour les applications de vannes cryog\u00e9niques.\r\n\r\n\r\n\r\n\r\n

Propri\u00e9t\u00e9s cl\u00e9s du mat\u00e9riau PCTFE<\/h2>\r\n\r\n\r\n\r\n
    \r\n \t
  • Dimensionnellement stable, rigide et r\u00e9sistant \u00e0 l'\u00e9coulement \u00e0 froid<\/li>\r\n \t
  • Tr\u00e8s faible perm\u00e9ation et d\u00e9gazage des gaz<\/li>\r\n \t
  • Absorption d'humidit\u00e9 proche de z\u00e9ro<\/li>\r\n \t
  • Excellente r\u00e9sistance chimique<\/li>\r\n \t
  • Haute r\u00e9sistance \u00e0 la compression<\/li>\r\n \t
  • Faible d\u00e9formation sous charge<\/li>\r\n \t
  • Ininflammable<\/li>\r\n \t
  • Plage de temp\u00e9rature\u00a0: -400\u00b0 \u00e0 380\u00b0F<\/li>\r\n \t
  • R\u00e9sistance aux radiations<\/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
    Propri\u00e9t\u00e9<\/td>\r\nValeur<\/td>\r\nUnit\u00e9s<\/td>\r\nM\u00e9thode<\/td>\r\n<\/tr>\r\n
    R\u00e9sistance \u00e0 la traction<\/td>\r\n4860 - 5710\r\n34 - 39<\/td>\r\npsi\r\nMPa<\/td>\r\nD 638<\/td>\r\n<\/tr>\r\n
    \u00c9longation<\/td>\r\n100 - 250<\/td>\r\n%<\/td>\r\nD 638<\/td>\r\n<\/tr>\r\n
    R\u00e9sistance \u00e0 la flexion, 73\u00b0F<\/td>\r\n9570 - 10300\r\n66 - 71<\/td>\r\npsi\r\nMPa<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Module de flexion<\/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
    R\u00e9sistance aux chocs, Izod, 23 \u00b0C<\/td>\r\n2,5 \u2013 3,5<\/td>\r\npi-lb\/po<\/td>\r\nD 256<\/td>\r\n<\/tr>\r\n
    Contrainte de compression \u00e0 la d\u00e9formation 1%,<\/td>\r\n1570 \u2013 1860\r\n11 - 13<\/td>\r\npsi\r\nMPa<\/td>\r\nD 695<\/td>\r\n<\/tr>\r\n
    Densit\u00e9<\/td>\r\n2.10 \u00e0 2.17<\/td>\r\ngm\/cu.cm<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Coefficient de dilatation lin\u00e9aire<\/td>\r\n7x10-5<\/td>\r\nK-1<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Point de fusion<\/td>\r\n410 -414\r\n210 - 212<\/td>\r\ndeg F\r\ndeg C<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Conductivit\u00e9 thermique<\/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
    Chaleur sp\u00e9cifique<\/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
    Temp\u00e9rature de distorsion thermique, 66 lb\/po\u00b2 (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
    Temp\u00e9rature de traitement<\/td>\r\n620\r\n327<\/td>\r\ndeg F\r\ndeg C<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Rigidit\u00e9 di\u00e9lectrique, courte dur\u00e9e, 0,004"<\/td>\r\n3000<\/td>\r\nVolt\/mil<\/td>\r\nD 149<\/td>\r\n<\/tr>\r\n
    R\u00e9sistance \u00e0 l'arc<\/td>\r\n360<\/td>\r\nseconde<\/td>\r\nD 495<\/td>\r\n<\/tr>\r\n
    R\u00e9sistivit\u00e9 volumique, @ 50% RH<\/td>\r\n2x1017<\/td>\r\nohm-cm<\/td>\r\nD 257<\/td>\r\n<\/tr>\r\n
    R\u00e9sistivit\u00e9 de surface, @ 100% RH<\/td>\r\n1x1015<\/td>\r\nOhm carr\u00e9-1<\/td>\r\nD 257<\/td>\r\n<\/tr>\r\n
    Constante di\u00e9lectrique, 1 kHz<\/td>\r\n2.6<\/td>\r\n\u03b5<\/td>\r\nD150-81<\/td>\r\n<\/tr>\r\n
    Facteur de dissipation, \u00e0 1 kHz<\/td>\r\n0.02<\/td>\r\n<\/td>\r\nD150-81<\/td>\r\n<\/tr>\r\n
    Absorption de l'eau<\/td>\r\n0.00<\/td>\r\nAugmentation du poids du %<\/td>\r\nD570-81<\/td>\r\n<\/tr>\r\n
    Indice de flamme+<\/td>\r\nIninflammable<\/td>\r\n<\/td>\r\nD 635<\/td>\r\n<\/tr>\r\n
    Coefficient de friction<\/td>\r\n<\/td>\r\n<\/td>\r\nD 1894<\/td>\r\n<\/tr>\r\n
    Gravit\u00e9 sp\u00e9cifique<\/td>\r\n2.10 \u00e0 2.17<\/td>\r\n<\/td>\r\nD792<\/td>\r\n<\/tr>\r\n
    Constante de perm\u00e9abilit\u00e9 \u00e0 l'humidit\u00e9<\/td>\r\n0.2<\/td>\r\ng\/m, 24 heures<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Perm\u00e9abilit\u00e9 \u00e0 l'O2<\/td>\r\n1,5 x 10-10<\/td>\r\nCc, cm\/cm2, sec, atm<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Perm\u00e9abilit\u00e9 au N2<\/td>\r\n0,18 x 10-10<\/td>\r\nCc, cm\/cm2, sec, atm<\/td>\r\n<\/td>\r\n<\/tr>\r\n
    Perm\u00e9abilit\u00e9 au CO2<\/td>\r\n2,9 x 10-10<\/td>\r\nCc, cm\/cm2, sec, 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

    Si\u00e8ge de soupape en PCTFE<\/h2>\r\n\r\n\r\n\r\n\r\nLes si\u00e8ges de robinet \u00e0 tournant sph\u00e9rique qui pr\u00e9sentent des signes de gonflement, de cloques ou de \u00ab popcorning \u00bb ont \u00e9t\u00e9 impr\u00e9gn\u00e9s au niveau mol\u00e9culaire. Inutile de dire que cela peut entra\u00eener de graves probl\u00e8mes tels que des fuites et des pannes catastrophiques. La solution consiste \u00e0 trouver un mat\u00e9riau de si\u00e8ge de robinet \u00e0 tournant sph\u00e9rique tr\u00e8s r\u00e9sistant \u00e0 la perm\u00e9ation et un excellent choix serait le PCTFE. Dans le billet de blog de cette semaine, nous parlerons des si\u00e8ges de robinets \u00e0 tournant sph\u00e9rique en PCTFE et de la mani\u00e8re dont ils sont utilis\u00e9s dans les applications \u00e0 faible perm\u00e9ation.\r\n\r\n\r\n\r\n\r\n\r\nL'un des meilleurs mat\u00e9riaux pour une application de si\u00e8ge de robinet \u00e0 tournant sph\u00e9rique o\u00f9 la perm\u00e9abilit\u00e9 est un probl\u00e8me serait le PCTFE (polychlorotrifluoro\u00e9thyl\u00e8ne), un chlorofluoropolym\u00e8re thermoplastique. Le PCTFE est parfois appel\u00e9 PTFE modifi\u00e9 ou PCTFE, ainsi que par les noms commerciaux Kel-F, Voltalef et Neoflon. Le PCTFE est souvent consid\u00e9r\u00e9 comme un mat\u00e9riau PTFE de deuxi\u00e8me g\u00e9n\u00e9ration qui maintient la r\u00e9sistance chimique et thermique du PTFE ainsi que son faible frottement. Il est \u00e9galement similaire \u00e0 d'autres polym\u00e8res fluor\u00e9s tels que le PFA ou le FEP.\r\n\r\n\r\n\r\n\r\n\r\nL'une des caract\u00e9ristiques d\u00e9terminantes du PCTFE est qu'il poss\u00e8de une structure mol\u00e9culaire beaucoup plus dense et une faible teneur en vides et en microporosit\u00e9 par rapport aux mat\u00e9riaux similaires pour les si\u00e8ges de robinet \u00e0 tournant sph\u00e9rique. Cela lui conf\u00e8re un coefficient de perm\u00e9abilit\u00e9 tr\u00e8s faible, ce qui signifie que la probabilit\u00e9 qu'il gonfle ou \u00e9clate est bien inf\u00e9rieure \u00e0 celle des autres mat\u00e9riaux. Par exemple, sa perm\u00e9abilit\u00e9 \u00e0 l'O2, au N2, au CO2 et au H2 est respectivement de 1,5 x 10-10, 0,18 x 10-10, 2,9 x 10-10 et 56,4 x 10-10 darcy.\r\n\r\n\r\n\r\n\r\n\r\nLe PCTFE offre \u00e9galement une t\u00e9nacit\u00e9 et une r\u00e9sistance am\u00e9lior\u00e9es ainsi qu'une bonne r\u00e9cup\u00e9ration de d\u00e9formation et une excellente r\u00e9sistance au fluage et \u00e0 l'\u00e9coulement \u00e0 froid. De plus, il offre une large plage de temp\u00e9ratures de fonctionnement allant de -100 \u00b0F \u00e0 500 \u00b0F. En fait, il fonctionne extr\u00eamement bien aux temp\u00e9ratures cryog\u00e9niques. En raison de son faible frottement, il en r\u00e9sulte \u00e9galement un couple de fonctionnement du robinet \u00e0 tournant sph\u00e9rique tr\u00e8s faible. Le PCTFE pr\u00e9sente \u00e9galement une absorption nulle d\u2019humidit\u00e9 et n\u2019est pas mouillant.\r\n\r\n\r\n\r\n\r\n\r\nLe PCTFE fonctionne bien dans les environnements d'exploitation o\u00f9 d'autres polym\u00e8res peuvent \u00e9chouer. Par exemple, il est bien adapt\u00e9 au service nucl\u00e9aire qui peut impliquer une forte exposition aux rayonnements, est ininflammable (D 635) et r\u00e9siste aux attaques de la grande majorit\u00e9 des produits chimiques et oxydants. Les seuls produits chimiques susceptibles de provoquer un l\u00e9ger gonflement sont les \u00e9thers, les esters, les solvants aromatiques et les compos\u00e9s halocarbon\u00e9s.\r\n\r\n","link":"https:\/\/zecovalve.com\/fr\/tag\/pctfe-valve-seat","name":"Si\u00e8ge de soupape en PCTFE","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\/fr\/tag\/pctfe-valve-seat\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\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\/fr\/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\":\"fr-FR\"},{\"@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\":\"fr-FR\",\"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\/fr\/wp-json\/wp\/v2\/tags\/1997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/posts?tags=1997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}