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Glass-filled PEEK back-up rings are high-performance anti-extrusion devices, typically using a 30% glass fiber reinforcement to significantly enhance the rigidity, dimensional stability, and compressive strength of PEEK over standard virgin PEEK. These rings protect O-rings in high-pressure (
psi), high-temperature (
/
), and chemically aggressive environments.
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Web results
VITREX FILLED-PEEK BACKUP RINGS - East Texas Seals
easttexasseals.com
https://www.easttexasseals.com › vitrex-filled-peek-back...
easttexasseals.com
https://www.easttexasseals.com › vitrex-filled-peek-back...
We sell Carbon-Filled & Glass-Filled PEEK Back-up Rings! Buy filled polyetheretherketone back-up rings in any size today!
PTFE & PEEK Backup Rings
AFT Fluorotec
https://www.fluorotec.com › manufactured-plastic-parts
AFT Fluorotec
https://www.fluorotec.com › manufactured-plastic-parts
Virgin PTFE or Glass Filled PTFE may be used where medium pressure and chemical resistance form the criteria but temperature is not an issue. At the other end ...Read more
PEEK Back Up Rings for High-Pressure Sealing Applications
PEEKCHINA
https://www.peekchina.com › blog › peek-back-up-rings
PEEKCHINA
https://www.peekchina.com › blog › peek-back-up-rings
Dec 19, 2025 — Their primary function is to prevent O-ring extrusion into sealing gaps when exposed to high pressure, temperature fluctuations, or aggressive ...Read more
When to Use PEEK, PTFE or Nylon Backup Rings
Advanced EMC Technologies
https://advanced-emc.com › when-to-use-peek-ptfe-or-...
Advanced EMC Technologies
https://advanced-emc.com › when-to-use-peek-ptfe-or-...
Mar 13, 2018 — Filled PTFE (glass filled, carbon filled, graphite filled, bronze filled) works with pressures up to 5,800 psi, however virgin PTFE is limited ...Read more
ANTI-EXTRUSION BACK-UP RINGS
Engineered Seals & Components
https://www.engseals.com › uploads › 2023/03
Engineered Seals & Components
https://www.engseals.com › uploads › 2023/03
PDF
Mar 9, 2023 — The specially formulated Glass filled Nylon, PA940, was designed to be used in conjunction with Urethane Loaded U-Cups , Rubber U-Cups, Rubber.Read more
19 pages
Wedged Back-up Rings
Parker US
https://www.parker.com › Parker-com › Literature
Parker US
https://www.parker.com › Parker-com › Literature
PDF
The rigid back-up ring design has little effect on breakout and running ... 4686 = Glass-filled PEEK. 4738 = Carbon, Graphite, PTFE-filled PEEK. 4655 ...Read more
4 pages
What Is PEEK Back Up Rings?
JST-Seals
https://www.jst-seals.com › blog › what-is-peek-back-up-...
JST-Seals
https://www.jst-seals.com › blog › what-is-peek-back-up-...
Excellent chemical resistance. ○ Very low moisture absorption. ○ Good wear and abrasion resistance. Glass filled PEEK™.Read more
PEEK Back-Up Rings
Gallagher Fluid Seals
https://www.gallagherseals.com › blog › the-pros-and-co...
Gallagher Fluid Seals
https://www.gallagherseals.com › blog › the-pros-and-co...
The most common custom material for back-up rings is usually PEEK (polyether ether ketone). PEEK has some distinct advantages as a back-up ring material.
Peek Backup Rings For High Temperature & High Pressure
Port Plastics
https://portplastics.com › Blog
Port Plastics
https://portplastics.com › Blog
Apr 11, 2023 — Virgin PEEK and filled grades are widely used to handle the highest pressure and elevated temperatures while providing low friction and chemical compatibility.Read more
Back-Up Rings
KC Seals
https://kcseals.ca › Products
KC Seals
https://kcseals.ca › Products
Glass-filled PEEK back-up rings incorporate glass fibers into the PEEK (Polyether Ether Ketone) polymer matrix to enhance its mechanical properties and thermal ...Read more