Perfluoroelastomer FFKM Rubber O-Ring
Model:KXT 1710FM
FFKM perfluoroelastomer O-ring (KXT 1710FM) for semiconductor, pharma and chemical service. Fully fluorinated, −10 to +316 °C in inert/reducing atmosphere, near-universal chemical resistance, 40–80 Shore A. SAE AS568 / ISO 3601 / JIS B2401 sizes and custom dimensions. FDA and low-outgassing grades. Reply within 2 business hours.
Model KXT 1710FM
Perfluoroelastomer FFKM Rubber O-Ring for Semiconductor, Pharma & Chemical Processing
When the seal has to survive aggressive chemicals, plasma, solvents and +300 °C in inert or reducing atmosphere at the same time, standard FKM and NBR O-rings fall short — FFKM is the last step before a metal seal. Kaxite supplies perfluoroelastomer O-rings machined and compression-moulded from fully fluorinated FFKM compounds, with a fluorine content high enough to resist almost the entire chemical table.
Available in SAE AS568 / ISO 3601 / JIS B2401 standard sizes and in custom dimensions, hardness from 40° to 80° Shore A, black or white. FDA-compliant and low-outgassing grades available for semiconductor, food and pharmaceutical service.
Send your groove dimensions, media, temperature and pressure — our technical team replies with a compound recommendation and price within 2 business hours.
At a glance
KXT 1710FM FFKM O-ring
- +316 °C*max service temp. in inert/reducing atm.
- −10 °Cmin service temp.
- 1.5 g/cm³specific gravity
- 40–80Shore A hardness
- 2 hourstechnical reply
*Continuous service in air is typically +230 to +260 °C depending on compound. Confirm the correct grade with Kaxite.
−10~+316*°C inert/reducing
Nearly allChemicals
40–80Shore A
1.5 g/cm³Density
FDAGrade available
What Buyers Get From Kaxite
01 Full compound range
Standard black FFKM, white FDA-grade, low-outgassing semiconductor grade and low-temperature grade. See our workshop.
02 Standard and custom sizes
SAE AS568, ISO 3601 and JIS B2401 standard O-ring sizes from stock. Custom ID, cross-section and non-standard dimensions produced to your drawing.
03 Certificates with the goods
Material declaration, FDA compliance certificate and batch traceability available on request. See our certificates.
04 Low MOQ
Small quantities for qualification and pilot runs accepted. Bulk pricing for production quantities. Technical reply within 2 business hours.
05 Honest lead times
Standard sizes normally ship in 7–15 working days. Custom and non-standard sizes quoted against real production capacity. See packaging & shipping.
06 Quality you can audit
Dimensional check, hardness and specific gravity tested on every batch. Third-party inspection (SGS / BV / TUV) supported. See our quality process.
Why FFKM and Not FKM or NBR
FFKM (perfluoroelastomer) sits at the very top of the rubber sealing pyramid. Its carbon backbone is completely fluorinated — the same chemistry that makes PTFE inert — while still retaining the elasticity of an elastomer. The practical difference is not incremental: it is a step change in temperature, chemical resistance and long-term reliability.
- Temperature. FFKM handles a continuous service range of −10 °C up to +316 °C in inert or reducing atmosphere. In air, the typical continuous limit is +230 to +260 °C depending on compound. Special compounds go beyond 300 °C in inert/reducing atmosphere. FKM tops out around +200 °C and NBR at +100 °C.
- Chemical resistance. FFKM resists nearly all chemicals — inorganic acids, alkalis, ketones, esters, alcohols, fuels, hot water, and the aggressive plasma chemistries used in semiconductor processing. FKM and NBR do not.
- Retains elasticity. Unlike PTFE, FFKM keeps elastomeric recovery, so it seals at low compression set and can be re-used after maintenance in some applications.
- Low outgassing. Semiconductor-grade FFKM compounds release extremely low volatiles under vacuum, protecting wafer yield in plasma etch and CVD tools.
- Good aging resistance. Long-term compression set stays low even after thousands of hours at temperature.
- FDA compliance. Food-contact and pharmaceutical grades are available with full documentation.
When FFKM is not the right choice: FFKM is a premium material and not always the most economical. For general-purpose sealing at moderate temperature, an FKM Viton O-ring or a Buna-N O-ring will often do the job at a fraction of the cost. Tell us the temperature and media and we will recommend honestly.
Temperature Range Comparison
The bars below are indicative and not to scale. Actual limits depend on compound, atmosphere and operating conditions.
FFKM (Perfluoroelastomer)−10 °C to +316 °C*
FKM / Viton−20 °C to +200 °C
Buna-N / NBR−30 °C to +100 °C
Silicone VMQ−60 °C to +200 °C
Reading this comparison: FFKM wins on the high-temperature end — often the deciding factor in semiconductor, aerospace and chemical process service. The upper limit shown assumes inert or reducing atmosphere; in air, confirm the allowable continuous temperature with Kaxite. If your application runs below +200 °C, tell us the media and we will confirm whether an FKM O-ring is a more economical answer.
Technical Specifications
- Model
- KXT 1710FM
- Material
- Perfluoroelastomer (FFKM) — fully fluorinated rubber compound
- Colour
- Black (standard) · White (FDA-grade and semiconductor-grade)
- Specific gravity
- Approx. 1.5 g/cm³ (ASTM D297)
- Hardness
- 40° to 80° Shore A (ASTM D2240)
- Tensile strength
- 7.6 MPa minimum (ASTM D412)
- Elongation at break
- 150% minimum (ASTM D412)
- Compression set (204 °C × 70 h)
- Permanent set 15% maximum (ASTM D395B)
- Low temperature resistance
- −10 °C (ASTM D1329)
- Temperature range
- −10 °C to +316 °C (ASTM D2000) in inert or reducing atmosphere; special compounds beyond 300 °C in inert/reducing atmosphere
- Air service (continuous)
- Typically +230 °C to +260 °C depending on compound; confirm with Kaxite for your application
- Standard sizes
- SAE AS568 / ISO 3601 / JIS B2401 standard O-ring sizes from stock
- Custom sizes
- Non-standard ID, OD, cross-section produced to drawing or sample
- Certificates
- Material declaration, FDA compliance, low-outgassing statement on request; third-party inspection (SGS / BV / TUV) supported
Grades and Sizes Available
FFKM O-rings are supplied in a range of grades depending on the application. The right grade depends on temperature, media and whether FDA or low-outgassing compliance is required.
GRADE 01Standard black FFKM
General-purpose grade for chemical processing, oil and gas, aerospace. −10 °C to +316 °C in inert or reducing atmosphere; in air typically +230 to +260 °C depending on compound; near-universal chemical resistance.
GRADE 02White FDA-grade FFKM
Formulated without carbon black, suitable for food, pharmaceutical and clean chemical service. FDA-compliant documentation available.
GRADE 03Semiconductor-grade FFKM
Ultra-low outgassing for plasma etch, CVD, PVD and other vacuum applications. Protects wafer yield.
GRADE 04Low-temperature FFKM
Special compounds extending the low end below −10 °C without sacrificing the upper-temperature limit.
SIZE 01AS568 / ISO 3601 standard sizes
Standard O-ring sizes to SAE AS568 / ISO 3601 in cross-sections from 1/16" up to 1/2". Wide range from stock.
SIZE 02Metric & JIS standard sizes
Metric cross-sections from 1.5 mm up to 8.4 mm, and JIS B2401 sizes. Both from stock.
Where FFKM O-Rings Are Used
FFKM O-rings are specified wherever the seal has to survive aggressive chemistry, plasma or extreme temperature without degrading. Typical installations include:
SemiconductorPlasma etch / CVD
ChemicalReactors, pumps
PharmaAPI reactors, valves
Oil & GasDownhole, wellhead
AerospaceFuel & hydraulics
AnalyticalGC, HPLC, MS
High vacuumUHV chambers
Food & pharmaFDA-grade seal
Related rubber sealing products in the same family include Viton FKM O-rings, Buna-N Nitrile O-rings, silicone rubber O-rings, EPDM O-rings, neoprene O-rings and FVMQ fluorosilicone O-rings.
Packing and Shipping
FFKM O-rings are supplied in sealed plastic bags, packed flat in cartons or wooden cases suitable for sea and air freight. Customer labels, size markings and packing lists are available on request. Special handling requirements (cleanroom packaging, low-particulate bags) can be arranged — see packaging & shipping.
Shipping is by sea, rail or air depending on your schedule and destination. Standard sizes normally ship within 7–15 working days of order confirmation. Custom and non-standard sizes are quoted against real production capacity.
Buyer FAQ
What is the difference between FFKM and FKM (Viton)?
Both are fluorinated rubbers, but FFKM is fully fluorinated whereas FKM is only partially fluorinated. FFKM offers a higher temperature range (up to +316 °C in inert or reducing atmosphere vs. ~+200 °C for FKM) and far broader chemical resistance. FKM is the more economical choice when the media and temperature are less aggressive.
What is the maximum and minimum service temperature?
The standard FFKM compound operates from −10 °C to +316 °C continuously in inert or reducing atmosphere. In air, typical continuous service is +230 °C to +260 °C depending on compound. Special compounds extend the upper limit above 300 °C in inert/reducing atmosphere, and low-temperature grades extend the bottom below −10 °C. Tell us your actual temperature profile and we will confirm the correct grade.
Which chemicals are NOT compatible with FFKM?
FFKM resists nearly all industrial chemicals. The notable exceptions are molten alkali metals (sodium, potassium) and some high-temperature fluorinated solvents. If your media is unusual, tell us the chemical name and concentration and we will confirm compatibility.
Do you supply FDA-grade and semiconductor-grade FFKM?
Yes. White FDA-compliant grade is available for food and pharmaceutical service, and low-outgassing semiconductor grade for plasma and vacuum applications. State the requirement in the inquiry and we will quote the correct grade with the corresponding documentation.
Can you produce non-standard sizes to drawing?
Yes. Non-standard ID, OD, cross-section and non-round profiles can be produced to drawing or sample. Send a PDF, DWG or DXF drawing, or a physical sample, and we will confirm feasibility and price.
Do you supply material certificates?
Yes. Material declaration, FDA compliance statement and batch traceability are available on request, and third-party inspection (SGS, BV, TUV or client-nominated) can be arranged or hosted at additional cost. See our certificates.
What is the minimum order quantity?
No rigid minimum. Small quantities for qualification and pilot runs are accepted at the same unit price structure. Larger production quantities are quoted at a lower unit price.
How quickly can you quote and ship?
Send the O-ring size (ID × cross-section, or standard reference), quantity, media, temperature and pressure. With these details we can give you a technical recommendation and price within 2 business hours. Standard sizes normally ship within 7–15 working days of order confirmation.
Request a Quotation for FFKM O-Rings
Send us your O-ring size (ID × cross-section, or standard reference), quantity, operating temperature, pressure and process media — or simply a clear photo of the existing O-ring with a ruler in frame — and we will come back with a compound recommendation, price and realistic delivery date.
- Tel: 0086-574-87527771
- E-mail: kaxite@seal-china.com
- Address: No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang, China
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