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FFKM – Perfluoroelastomer

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.

Chemical resistant measurement products
  • 200 inch range 0-10Vdc output level sensor for soap water with up to 50% NaOH concentration
  • Corrosive Chemical Compatible Flush Diaphragm Liquid Level Sensors
  • Hastelloy diaphragm -100 to 50 kPa g range manometer
  • 250cm range 0-10Vdc output plastic submersible chemical tank level sensor

Media Compatibility Related Terms

More pages related to media compatibility technical terms.

  • Air Pressure
  • Al2O3
  • Bonded Seal
  • Dry Cell
  • Dry/Dry
  • EPDM – Ethylene Propylene Diene Monomer
  • FEP – Fluorinated Ethylene Propylene
  • FKM – Fluoroelastomer
  • Food Grade
  • High Temperature Protection
  • Hydrostatic Pressure
  • IP Ratings
  • Oxygen Service
  • PUR, PU – Polyurethane
  • PVC – Polyvinyl Chloride
  • Stainless Steel Pressure Sensors
  • Submersible
  • Wet/Dry
  • Wet/Wet
  • Wetted Parts

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