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FEPM, Aflas® O-Rings & Seals

The FEPM designation was originally directed at copolymers of tetrafluoroethylene (TFE) and propylene (P). TFE/P provides a unique combination of chemical, heat, and electrical resistance. Chemically, TFE/P resists both acids and bases, as well as steam, amine-based corrosion inhibitors, hydraulic fluids, alcohol, and petroleum fluids. TFE/P is also resistant to ozone and weather. TFE/P typically retains its remarkable chemical resistance even in high temperatures (short exposures up to 450 °F, 232 °C), and tests have shown that electrical resistance actually improves with heat exposure. Nor do physical properties suffer; tensile strength typically approaches 2,500 psi.

NewDealSeals supplies Aflas® O-rings & FEPM seals in any dimension. Do you need sealing expertise and service around your applications? Call +31(0)226362233 or mail us info@newdealseals.com.

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Black Aflas® o-rings and FEPM seals in blue and green

Specifications FEPM

  • Temperature range:
    -20 to 204 °C
  • Shore:
    30 / 40 / 50 / 60 / 70 / 80 / 90
  • Relative Cost:
    Rating symbol: High
  • Tradenames:
    Aflas® (Asahi Glass), Dyneon BRF® (3M), Viton VTR® (DuPont)
  • Common names:
    FEPM, Aflas®, TFE/P
  • Colours:
    Black. Other colors on request.

FEPM Characteristics

Resistance FEPM
Abrasion Rating symbol: Good to Excellent
Acid Rating symbol: Excellent
Base Rating symbol: Excellent
Chemical Rating symbol: Excellent
Cold Rating symbol: Poor
Flame Rating symbol: Excellent
Heat Rating symbol: Excellent
Resistance FEPM
Oil Rating symbol: Excellent
Ozon Rating symbol: Excellent
Set Rating symbol: Good
Steam Rating symbol: Good to Excellent
Tear Rating symbol: Poor to Fair
Water Rating symbol: Good
Weather Rating symbol: Excellent
Propertys FEPM
Dynamic properties Rating symbol: Good
Electrical properties Rating symbol: Excellent
Gas impermeability Rating symbol: Good
Tensile strength Rating symbol: Fair to Good

FEPM performs well in

  • Acids & bases
  • Amines
  • Brake fluids
  • Petroleum fluids
  • Steam

FEPM does not perform well in

  • Aromatic fuels
  • Ethers
  • Ketones
  • Toluene

Typical FEPM Applications

  1. Oil field applications
  2. Chemical processing
  3. Cooling systems