design guide

Fluorocarbon (FKM)

Fluorocarbon elastomers are highly fluorinated, carbon backboned polymers used in applications to resist harsh chemical and ozone attack with a thermal stability to 500°F (262°C). Fluorocarbons also offer low compression set and excellent aging characteristics. FKM elastomers provide excellent service in oil, gasoline, hydraulic fluids, hydrocarbon solvents and extended fuels.

The fluorine on the elastomer backbone provides the relative inertness of FKM elastomer. Generally speaking, with increasing fluorine content, resistance to chemical attack is improved while low temperature characteristics are diminished. There are, however, a few specialty grade fluorocarbons that can provide high fluorine content with low temperature properties.

Compound 514GJ

  • Superior fluid resistance as compared to general purpose fluorocarbons
  • Excellent performance with herbicides, pesticides, gasoline and alcohol extended fuels

Compound 514VJ

  • Provides good low temperature flexibility for -16°F (-27°C)

Compound 514BC

  • Provides the best low temperature flexibility for -40°F (-40°C)

Perfluoroelastomers (FFKM)

Compound 514QN, 514WT, 514AD, 514AQ, 514VN

  • Minnesota Rubber and Plastics' general purpose FKM compound series
  • Hardness range 55-90 Shore A
  • Outstanding corrosive fluid resistance
  • Low compression set
  • Excellent seal compounds
  • Low outgassing

Compound 514TS

  • Low temperature service FKM -4°F (-20°C)
  • Excellent extended fluid resistance and general fluids resistance

Compound 514UE

  • A very chemically resistant fluorocarbon material
  • Exhibits broad resistance to bases, amines, and polar solvents
    Tensile Elongation Oil Aging
Volume Swell (Change %)
70hr at 150°C/302°F
Fuel Aging
Volume Swell (Change %)
70hr at 23°C/73°F
Compound Hardness
Shore A
MPa psi (%) IRM 901 IRM 903 Ref fuel B Ref fuel C
514QN 55 6.9 1000 300 +0 +3 +4 +9
514WT 60 8.3 1200 280 +2 +4 +2 +6
514AD 70 10.3 1500 200 +1 +4 +2 +3
514AQ 80 11.4 1650 180 +2 +4 +2 +4
514VN 90 10.3 1500 160 +2 +3 +2 +4
514GJ 70 14.5 2100 250 +0 +3 +2 +2
514TS 70 12.4 1800 150 +1 +2 +6 +8
514VJ 75 11.0 1600 120 0 +2 +4 -
514UE 80 11.0 1600 200 - - - -