Materials

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ExpresSeal can make your seals from a variety of materials depending on your requirements. These include:

 

Machinable Grade

Polyurethane (Red) (FDA Compliant)
(-20°C to 115°C) Temperature Range: -4°F to 240°F Hardness: 95 Shore-A

HPU® (Hydrolysis Resistant Polyurethane)

  • Excellent wear and extrusion resistance
  • Suitable for use in high pressure hydraulic sealing applications
  • Hydraulic applications where water based fluids are being used
NBR (Black) (Nitrile Butadiene Rubber)
Hardness: 85 Shore-A Temperature Range: -22°F to 230°F
  • Good abrasion resistance
  • Elastic, allowing for ease of installation
  • Hydraulic and pneumatic applications
EPDM (Black) (Ethylene-Propylene-Diene Rubber)
Hardness: 85 Shore-A Temperature Range: -49°F to 266°F
  • Resistance to steam, ozone, and direct sun light
  • Flexibility at lower temperatures
  • Widely used in outdoor applications, Automotive brake systems, Automobile cooling systems, Water and Steam applications
  • Poor resistance to mineral oil, gasoline, and hydrocarbon solvents
Fluorocarbon Rubber (Brown or Black) (Viton®)
Hardness: 85 Shore-A Temperature Range: -4°F to 428°F
  • Resistance to ozone, weathering, and high heat
  • Excellent chemical resistance
  • This material is typically used in HFD fluids (Phosphate Ester and Chlorinated Hydrocarbon based Fluids)
Silicone Rubber (Light Blue or Orange)
Hardness: 85 Shore-A Temperature Range: -76°F to 392°F
  • Good chemical resistance
  • Excellent temperature range
  • Poor abrasion and tear resistance; Typically used in static applications
H-NBR (Green)
Hardness: 85A durometer Temperature Range: -4°F to 302°F

H-NBR is a Hydrogenated Nitrile Butadiene Rubber compound

  • Strongest compound of all the elastomers
  • Excellent abrasion and tear resistance
  • Widely used in applications involving water based fluids - especially Water-Glycol fluids
  • Good replacement for Viton in applications where the temperature does not exceed its physical properties

Key uses: Oil resistant applications, including exposure to such oil additives as detergents, anti-oxidants and anti-wear agents. Exposure to oil soured with metal sludge. Seals for oil well applications. Seals for automotive fuel handling systems.

POM (White or Black) (Polyoxymethelene/Polyacetal) (Hard Plastics)
Temperature Range: -49°F to 212°F
  • Used for sealing components such as back-up rings and special shapes
  • Low absorption of water (low swelling) and strong mechanical properties make this material ideal for bearings and guide-rings
Virgin Teflon® (White) - PTFE (Polytetrafluoroethylene)
Temperature Range: -300°F to +450°F

PTFE - Teflon is a tough, chemically inert polymer possessing an incredible working temperature range.

  • Excellent temperature range
  • Low friction
  • Chemically inert to virtually all industrial chemicals, even at elevated temperatures
  • Good chemical resistance to such solvents as acetone, MEK, and xylene
  • Very poor elastic memory
  • Will cold flow (creep) over time
Nickel Teflon® (Grey) - NTFE (Nickel/Moly/Glass Filled Teflon)
Temperature Range: -300°F to +450°F
  • Same good physical and chemical properties with better creep behavior than virgin PTFE
  • Good for anti-extrusion rings, back-up rings, guide rings and in chevron packing sets
  • Some chemicals may not be compatible with the fillers
Bronze Filled Teflon® (Brown) - BTFE (Bronze Filled Teflon)
Temperature Range: -300°F to +450°F
  • Better wear, creep resistance, and higher thermal conductivity than virgin and glass fiber filled PTFE
  • Used in applications which undergo high mechanical loads or high-speed rubbing contacts
  • Poor chemical resistance in the presence of acids and alkali
Carbon Filled Teflon® (Black) – CTFE (Carbon Filled Teflon)
Temperature Range: -300°F to +450°F
  • Good chemical resistance to corrosive environments
  • Exhibits good initial wear and rubbing characteristics, both dry and water applications
  • Frequently used in piston seals

Special Order Machinable Grade(Minimums may apply on some materials)

Polyurethane - Self Lubricating (Grey)
Hardness: 95 Shore-A Temperature Range: -4°F to 230°F

SL-PU® Hydrolysis Resistant Polyurethane with internal Solid Lubricants.

  • For applications with sparse system lubrication
  • Commonly used in hydraulic and pneumatic applications
Polyurethane - Low-Temp (Dark Blue)
Hardness: 95 Shore-A Temperature Range: -58°F to 230°F

LT-PU® High Performance Polyurethane designed to perform in Low Temperatures

  • This material maintains its performance characteristics in extremely cold climates
  • Is not hydrolysis resistant
Polyurethane (Yellow)
Hardness: 55 Shore-D Temperature Range: -4°F to 240°F

HPU 55D® Hydrolysis Resistant Polyurethane with a Shore-D hardness of 55

  • Ideal for high pressure and heavy duty applications
  • May be used to replace Teflon seals because of exceptional wear resistance, competitive price, and ease of installation
EPDM - FDA (Black) (White)
Hardness: 85 Shore-A Temperature Range: -49°F to 266°F
  • FDA compliant with the same features as regular EPDM
AFLAS (Black)
Hardness: 85 Shore-A Temperature Range: -23°F to 392°F

AFLAS® (Fluoro Rubber)

  • Commonly used in (but not limited to) Refinery, Off Shore and Down Hole Applications
UHMW-PE (White) Max.
Temperature Range: +180°F
  • Outstanding abrasion resistance, superior impact resistance, non-sticking and self-lubricating properties
  • Excellent mechanical properties, even in cryogenic conditions
  • Chemical, corrosion, and wear-resistant
Glass Filled Teflon (White) – GTFE (Glass Fiber Filled Teflon)
Temperature Range: -300°F to +450°F
  • Good chemical and electrical properties
  • Greatly improved mechanical properties (compressive and wear resistance) over unfilled PTFE
  • Resists acids and oxidation
  • Not recommended for alkali environments
Virgin Teflon® – FDA (White) - PTFE
Temperature Range: -300°F to +450°F
  • FDA compliant with the same features as regular Virgin Teflon
Hytrel®

Hytrel® Thermoplastic Polyester Elastomers

  • Provides the flexibility of rubbers and the strength of plastics
  • Ideal for parts requiring excellent flex fatigue and broad use temperature
  • Resists tearing, flex-cut growth, creep and abrasion
  • Outstanding toughness while resisting hydrocarbons and many other fluids