{"product_id":"tri-clamp-ptfe-gasket","title":"Tri-Clamp PTFE Gasket, 2\", 4\" and 6\"","description":"\u003cp\u003eSolid PTFE tri clamp gasket, FDA compliant, in 2, 4 and 6 inch, from $3.25. Every size is priced on this page.\u003c\/p\u003e\n\u003cp\u003ePTFE is the only material in this range that rates excellent against isopropyl, and it is the cheapest way to get full chemical resistance. It also runs to -350 F (-212 C), far colder than any elastomer, which matters more than most people expect.\u003c\/p\u003e\n\n\u003ch3\u003eSizes and price\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 in\u003c\/td\u003e\n\u003ctd\u003e$3.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4 in\u003c\/td\u003e\n\u003ctd\u003e$6.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6 in\u003c\/td\u003e\n\u003ctd\u003e$19.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eSolid PTFE is stocked in 2, 4 and 6 inch only. For 1 inch or 1.5 inch, use the \u003ca href=\"\/products\/envelope-gasket-ptfe-viton\"\u003ePTFE envelope gasket\u003c\/a\u003e, which puts the same PTFE against the process with a Viton core behind it, or the \u003ca href=\"\/products\/tri-clamp-viton-gasket\"\u003eViton gasket\u003c\/a\u003e if the service is not isopropyl and not below -40 F (-40 C).\u003c\/p\u003e\n\n\u003ch3\u003eThe numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTemperature: -350 F to 500 F (-212 C to 260 C)\u003c\/li\u003e\n\u003cli\u003eClamp torque: 50 in-lb, the rigid figure. An elastomeric gasket takes 30. Torque a rigid gasket to elastomeric spec and it leaks\u003c\/li\u003e\n\u003cli\u003eCompliance: FDA compliant\u003c\/li\u003e\n\u003cli\u003eExcellent on: butane, propane, ethanol, heptane, pentane, hexane and isopropyl\u003c\/li\u003e\n\u003cli\u003eBehaviour: rigid. It does not spring back, it is subject to creep and cold flow, and it wants a high pressure clamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf the joint gets broken and remade every run, the \u003ca href=\"\/products\/envelope-gasket-ptfe-viton\"\u003ePTFE envelope gasket\u003c\/a\u003e is the better choice. The Viton core inside gives it the recovery that solid PTFE does not have.\u003c\/p\u003e\n\n\u003ch3\u003eSolvent compatibility, by material\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003cth\u003eButane\u003c\/th\u003e\n\u003cth\u003ePropane\u003c\/th\u003e\n\u003cth\u003eEthanol\u003c\/th\u003e\n\u003cth\u003eHeptane\u003c\/th\u003e\n\u003cth\u003ePentane\u003c\/th\u003e\n\u003cth\u003eHexane\u003c\/th\u003e\n\u003cth\u003eIsopropyl\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePTFE\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViton (FKM)\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuna-N\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eC\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eE\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilicone\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eA excellent, B good with minor effect, C fair and not for continuous use, D severe and not recommended, E no data. From the N.B. Oler Sintered Filter Technical Specifications, Rev. 2026.1.\u003c\/p\u003e\n\n\u003ch3\u003eWhich material for which job\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003cth\u003eTemperature\u003c\/th\u003e\n\u003cth\u003eTorque\u003c\/th\u003e\n\u003cth\u003ePick it when\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolid PTFE\u003c\/td\u003e\n\u003ctd\u003e-350 F to 500 F (-212 C to 260 C)\u003c\/td\u003e\n\u003ctd\u003e50 in-lb\u003c\/td\u003e\n\u003ctd\u003eIsopropyl, or cold service. Cheapest route to full chemical resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePTFE envelope, Viton core\u003c\/td\u003e\n\u003ctd\u003e-100 F to 400 F (-73 C to 204 C)\u003c\/td\u003e\n\u003ctd\u003e50 in-lb\u003c\/td\u003e\n\u003ctd\u003ePTFE chemistry with spring-back, for joints broken every run\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViton (FKM)\u003c\/td\u003e\n\u003ctd\u003e-40 F to 400 F (-40 C to 204 C)\u003c\/td\u003e\n\u003ctd\u003e30 in-lb\u003c\/td\u003e\n\u003ctd\u003eThe hydrocarbon default. Not for isopropyl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuna-N\u003c\/td\u003e\n\u003ctd\u003e-30 F to 250 F (-34 C to 121 C)\u003c\/td\u003e\n\u003ctd\u003e30 in-lb\u003c\/td\u003e\n\u003ctd\u003eWater, food, general sanitary. Cheapest\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilicone\u003c\/td\u003e\n\u003ctd\u003e-85 F to 450 F (-65 C to 232 C)\u003c\/td\u003e\n\u003ctd\u003e30 in-lb\u003c\/td\u003e\n\u003ctd\u003eSteam and food. Severe on every hydrocarbon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eThe cold end is where the gasket governs\u003c\/h3\u003e\n\u003cp\u003eAn N.B. Oler system operates down to -85 F (-65 C). No fluoroelastomer goes that cold. On the cold end of a run the gasket is the limiting component, not the vessel, which is why PTFE is on this list at all. Check the gasket against your lowest process temperature, not against the vessel rating.\u003c\/p\u003e\n\n\u003ch3\u003eReplacement and quantities\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplace every 3 to 6 months regardless of how it looks\u003c\/li\u003e\n\u003cli\u003eReplace immediately on any cracking, tearing, splitting or permanent deformation\u003c\/li\u003e\n\u003cli\u003eA gasket that has taken a compression set passes a cold leak check and then weeps once the line comes up to pressure. That is why interval beats inspection on a gasket\u003c\/li\u003e\n\u003cli\u003eA 20 LB system takes 22 six inch gaskets. A 40 LB takes 44\u003c\/li\u003e\n\u003cli\u003eFull comparison: \u003ca href=\"\/blogs\/tech\/choosing-the-right-gasket-material-for-tri-clamp-connections-a-comprehensive-comparison-of-buna-n-viton-and-ptfe\"\u003eChoosing the right gasket material for tri-clamp connections\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eStocked in Bend, Oregon.\u003c\/p\u003e","brand":"N.B.Oler","offers":[{"title":"2\"","offer_id":67782186565831,"sku":"40MPG-200-FDA","price":3.25,"currency_code":"USD","in_stock":true},{"title":"4\"","offer_id":67782186598599,"sku":"40MPG-400-FDA","price":6.95,"currency_code":"USD","in_stock":true},{"title":"6\"","offer_id":67782186631367,"sku":"40MOG-600-FDA","price":19.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.nboler.com\/products\/tri-clamp-ptfe-gasket","provider":"N.B.Oler","version":"1.0","type":"link"}