Perfluoroelastomer (FFKM) is a seal material type which has a much higher temperature rating than the more common FKM and can be used on temperatures up to 300°C. FFKM also has a broader chemical resistance than FKM.
FFKM is typically used to seal components which are designed to withstand media temperatures up to 300°C. FFKM is also used as an alternative seal material when the standard fitted seal material is not chemically compatible with the process media.
FFKM is a more expensive material than FKM and therefore it is only used in the construction of measurement equipment when it is absolutely necessary to meet the application requirements.
Kalrez®, Chemraz®, Perlast® and Simriz® are all well known brands of FFKM material used to manufacture O ring seals.
FFKM seals have the best chemical compatibility out of all the elastomers with almost universal chemical resistance.
Featured chemical resistant measurement products
Plastic Externally Fitted Hydrostatic Liquid Level Sensors - Plastic externally fitted hydrostatic level sensors with ceramic diaphragms offer a reliable and cost-effective solution for measuring liquid levels in chemical storage tanks.
Hastelloy diaphragm -100 to 50 kPa g range manometer - Small manometer device with membrane protected against corrosive material (chemicals) and which we would prefer to be covered with Hastelloy steel.
Glossary of Media Compatibility technical terms
- Al2O3
- Bonded Seal
- Dry Cell
- Dry/Dry
- EPDM – Ethylene Propylene Diene Monomer
- FEP – Fluorinated Ethylene Propylene
- FKM – Fluoroelastomer
- Food Grade
- IP Ratings
- PUR, PU – Polyurethane
- PVC – Polyvinyl Chloride
- Stainless Steel Pressure Sensors
- Wet/Dry
- Wet/Wet
- Wetted Parts
