FFKM O-Ring Guide for Chemical Processing and Storage
Learn About Materials Available for Semiconductor Grade O-Rings
We are experienced with the demanding applications found in the chemical processing and storage industry.
Selecting the best material or seal design can increase service life and predictability,
and reduce contamination, resulting in higher efficiency.
Chemical Processing and Storage
Chemical processing industry requires high performance sealing materials that offer excellent chemical resistance to various aggressive media. The diverse range of markets within this industry, including petrochemical and pharmaceutical, demand outstanding chemical sealing performance, reliability and increased service life, which in turn extends preventative maintenance cycles of mechanical seals.
Markez® Perfluoroelastomers provide the highest level of thermal and chemical resistance available, making them ideal for use in the most demanding chemical sealing applications. Compare price and performance to Kalrez®.
Marco Rubber can provide superior chemical sealing solutions for pumps, valves, mechanical seals, pipe couplings and reactors, which meet or exceed your requirements. To meet demanding chemical sealing applications, Marco Rubber seals are molded in a range of high specification materials capable of withstanding extreme temperatures and harsh chemical.
Need a custom product design or custom material formulation to improve performance in a specific application to separate yourself from the competition?
Let us prove how responsive our product and application engineers are and that our custom products and custom materials often cost less than our competitors standards.
- v-rings and Packings
- Custom Gaskets
- Back-up rings
- PTFE seals and O-rings
- SES spring energized seals
- Cap Seals
- Wear rings and Bushings
- Markez® Perfluoroelastomers
- Viton® Extreme (ETP)
FFKM Compatibility Extreme Chemical Resistant Markez® Materials and Order O-rings Online from a FFKM O-Ring Expert
Typical Inventory Level
High Temp (°F)
Low Temp (°F)
Steam < 300 °F
Steam > 550 °F
|610 (320ºC)||5 (-15ºC)|
|Black||75||Kalrez® 6375 |
|500 (260ºC)||5 (-15ºC)|
|480 (250ºC)||5 (-15ºC)|
|610 (320ºC)||-5 (-15ºC)|
|635 (335ºC)||-5 (-15ºC)|
|610 (320ºC)||-0 (-18ºC)|
|590 (310ºC)||5 (-15ºC)|
|600 (315ºC)||-20 (-30ºC)|
|Black||75||Kalrez® 0040||480 (250ºC)||-50 (-45ºC)|
|Black||90||Kalrez® 0040||465 (240ºC)||-50 (-45ºC)|
FKM Type Comparison Chart
FKM Viton ® Type
Marco Commodity Compound number
High Temperature Performance F° (C°)
|437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||450 (232)||450 (232)|
Low Temperature Performance F° (C°)
|-15 (-26)||-11 (-24)||1 (-17)||3 (-16)||-40 (-40)||-29 (-34)||-54 (-48)||-65 (-54)||-6 (-21)||25 (-4)||1 (-17)|
|TR-10 Low Temperature Flexibility F° (C°)||1 (-17)||7 (-14)||20 (-7)||21 (-6)||-22 (-30)||-11 (-24)||-40 (-40)||-49 (-45)||12 (-11)||37 (3)||20 (-7)|
|Strong Base, high pH, Caustic, Amines|
| Low Molecular Weight Carbonyls 100% |
concentration (MTBB, MBK, MIBK, etc.)
|Engine Lubricating Oil, SG and SH|
| Aqueous fluids, steam, mineral acids |
|Aromatic Hydrocarbons (toluene, etc.)|
| Automotive Fuels Oxygenated with |
MEOH, ETOH, MTBE, etc.
|Engine Lubricating Oil, SE and SF|
|Resistance to Compression Set|
|Automotive and Most Aviation Fuels|
|Rating Scale:||= Excellent||= Good||= Not Recommended|