Rubber Gaskets \u2013 The Everyday Workhorses<\/h2>\n\n\n\n
Rubber gaskets cover a huge family \u2013 EPDM, Viton, nitrile, neoprene, you name it. They’re elastomers, so they bounce back and fill gaps really well.<\/p>\n\n\n\n
Common ones for flanges:<\/p>\n\n\n\n
- \n
- EPDM<\/strong>: Great with water, steam, mild acids. Temp range typically -50\u00b0C to +150\u00b0C.<\/li>\n\n\n\n
- Viton (FKM)<\/strong>: Loves oils, fuels, harsher chemicals. Usually good from -20\u00b0C to +200\u00b0C or a bit more.<\/li>\n<\/ul>\n\n\n\n
Rubber seals tight on rougher flanges because it compresses nicely and recovers. They’re cheaper upfront and easier to source in standard sizes.<\/p>\n\n\n\n
But they do have limits \u2013 petroleum stuff eats some rubbers alive, and high heat makes them harden or crack over time.<\/p>\n\n\n\n
\n\n![\"\uc0ac\uc774\ud074\ub860](\"https:\/\/teflonx.com\/wp-content\/uploads\/2025\/03\/3-1_format-600x600.webp\")
\n\n<\/div><\/a><\/div><\/div>\n\n\n\n\uc0ac\uc774\ud074\ub860 \uc2dc\uc2a4\ud15c \ubc0f \ubc38\ube0c\uc6a9 \ub0b4\ud654\ud559\uc131 PTFE \uac1c\uc2a4\ud0b7 \uc2dc\ud2b8<\/a><\/h2>\n\n
\n\t\t\t\t\uc0ac\uc774\ud074\ub860 \ubd84\ub9ac\uae30 \ubc0f \uc0b0\uc5c5\uc6a9 \ubc38\ube0c \uc2dc\uc2a4\ud15c\uc6a9\uc73c\ub85c \uc124\uacc4\ub41c PTFE \uac1c\uc2a4\ud0b7 \uc2dc\ud2b8\ub294 \uc0b0, \uc54c\uce7c\ub9ac \ubc0f \uc6a9\ub9e4\uc5d0 \ub300\ud55c \ud0c1\uc6d4\ud55c \ub0b4\uc131\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \ub17c\uc2a4\ud2f1 \ud45c\uba74\uc740 \uc774\ubb3c\uc9c8 \ucd95\uc801\uc744 \ubc29\uc9c0\ud558\uc5ec \uc7a5\ube44 \uc218\uba85\uc744 \uc5f0\uc7a5\ud569\ub2c8\ub2e4. \ud45c\uc900 \uc2dc\ud2b8 \ub610\ub294 \ub9de\ucda4\ud615 \ub514\uc790\uc778\uc73c\ub85c \uc81c\uacf5\ub418\uc5b4 \uc644\ubcbd\ud55c \ud1b5\ud569\uc744 \uc9c0\uc6d0\ud569\ub2c8\ub2e4.<\/p>\n\n\t\t\t<\/div><\/div>\n\n\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\nHead-to-Head: Temperature Resistance<\/h2>\n\n\n\n
Temperature is usually the first knockout punch.<\/p>\n\n\n\n
PTFE wins easy here. Data from multiple engineering sources shows it stable up to 260\u00b0C continuous, with short spikes even higher. Rubber? EPDM tops out around 150\u00b0C before it starts degrading, Viton pushes to 200\u00b0C but still falls short of PTFE’s extreme range.<\/p>\n\n\n\n
In one setup I saw, a plant switched from Viton to PTFE on a 220\u00b0C steam flange \u2013 leaks stopped, and the gaskets lasted years longer.<\/p>\n\n\n\n
If your process runs hot or cycles a lot, PTFE saves you headaches.<\/p>\n\n\n\n
Chemical Compatibility \u2013 Where Things Get Interesting<\/h2>\n\n\n\n
This is PTFE’s home turf.<\/p>\n\n\n\n
PTFE resists almost everything \u2013 acids, bases, solvents, you name it. Only a couple exotic things like molten alkali metals or certain fluorine gases attack it.<\/p>\n\n\n\n
Rubber varies wildly:<\/p>\n\n\n\n
- \n
- EPDM handles water, glycols, mild acids great but swells horribly in oils.<\/li>\n\n\n\n
- Viton does better with hydrocarbons and stronger chemicals, but still not as universal as PTFE.<\/li>\n<\/ul>\n\n\n\n
Looking at chemical resistance charts from manufacturers like IPEX or Mykin, PTFE gets “excellent” across way more columns than any rubber.<\/p>\n\n\n\n
For corrosive flanges, PTFE is often the safer long-term bet.<\/p>\n\n\n\n
Quick Aside: PTFE vs EPDM<\/h3>\n\n\n\n
People ask about PTFE vs EPDM a lot because both get used in water and milder chems. EPDM is cheaper and seals easier on low-pressure stuff, but once you hit stronger acids or higher temps, PTFE pulls ahead big time. We’ve seen EPDM swell and fail in dilute sulfuric lines where our PTFE sheets just kept going.<\/p>\n\n\n\n
And What About Viton vs PTFE Gasket?<\/h3>\n\n\n\n
Viton vs PTFE gasket debates come up in oil and fuel systems. Viton resists petroleum beautifully and costs less than PTFE, but if you’ve got really aggressive solvents or super high heat, PTFE edges it out. Viton can harden over time in extreme conditions, while PTFE stays inert.<\/p>\n\n\n\n
Compression, Recovery, and Actual Sealing Performance<\/h2>\n\n\n\n
Rubber shines here \u2013 it’s elastic, fills surface imperfections, and recovers when bolts relax a bit.<\/p>\n\n\n\n
PTFE is stiffer and creeps more under load (that’s the cold flow thing everyone mentions). But modern expanded or filled PTFE fixes a lot of that, giving good recovery without being too soft.<\/p>\n\n\n\n
In practice, proper torque and clean flanges make either work, but rubber forgives sloppy surfaces better.<\/p>\n\n\n\n
Cost and Longevity \u2013 The Real Money Talk<\/h2>\n\n\n\n
Rubber wins on sticker price, no question. A basic EPDM gasket might cost half or less what PTFE does.<\/p>\n\n\n\n
But flip it around to total cost: PTFE often lasts way longer in tough environments. One example from sealing industry discussions \u2013 elastomer seals needing replacement every 6 months vs PTFE going 5 years. Do the math on downtime, labor, and lost product, and PTFE frequently comes out cheaper overall.<\/p>\n\n\n\n
At Teflon X, customers tell us switching to our PTFE sheets cut their gasket spend by 30-40% over a couple years because they weren’t replacing them constantly.<\/p>\n\n\n\n
- Viton (FKM)<\/strong>: Loves oils, fuels, harsher chemicals. Usually good from -20\u00b0C to +200\u00b0C or a bit more.<\/li>\n<\/ul>\n\n\n\n
![\"\uace0\uc555](\"https:\/\/teflonx.com\/wp-content\/uploads\/2025\/03\/4-1_format-600x600.webp\")