We supply our O-rings in over 100 general and high-specification grades of elastomer (and other materials) including ranges of low-temperature and rapid gas decompression (RGD) resistant materials.

Aflas® (FEPM)

  • Resists oils, lubricants and some fuels
  • Suitable for sour (H2S) gas, amines or high temperature water/steam
  • Our AF69/90 grade is formulated for rapid gas decompression resistance
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Butyl (IIR)

  • Very low gas permeability
  • Suitable for vacuum and high pressure applications
  • Must not be used with mineral oils
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Chloroprene (CR)

  • General purpose elastomer, usually known as neoprene
  • Suitable for use with many media
  • Largely unaffected by sunlight and atmospheric ageing
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Chlorosulphonyl polyethylene (CSM)

  • Excellent resistance to weathering
  • Gives good service with many media on static sealing duties
  • Suited mainly to static sealing duties
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DuPontTM Kalrez® (FFKM)

  • Perfluoroelastomer compounds with almost universal chemical resistance
  • Specific grades operate at up to 325°C
  • James Walker is authorised distributor for DuPont Kalrez items used for fluid sealing and handling duties
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Elast-O-Lion® (HNBR)

  • Our range of high-performance hydrogenated nitrile compounds
  • Excellent mechanical and chemical properties
  • Three RGD-resistant grades are recommended for oilfield duties
  • Stocked O-ring grades: Elast-O-Lion® 101, 180 and 985
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Epichlorohydrin (ECO)

  • Good resistance to mineral oils, fuels and ozone
  • Sealing applications limited by corrosive properties and poor compression set resistance
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Ethylene-propylene (EPM/EPDM)

  • Excellent resistance to weathering, ozone, water and steam
  • O-rings in EP62 range are approved for potable water duties
  • Stocked O-ring grade: EP18/H/75
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Fluoroelastomers (FKM)

  • Viton®, Tecnoflon® and DyneonTM are well-known compounds
  • Suitable for severe chemical conditions and high temperatures
  • FR25/90, FR58/90 grades are RGD resistant and qualified to Norsok M-710
  • Stocked O-ring grades: FR10/80, FR25/90, FR58/90
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Fluorosilicone (FVMQ)

  • Widely used for static seals in aerospace fuel systems
  • Resistant to hydrocarbon oils, petroleum fuels and mineral-based hydraulic fluids
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Kalrez® 0090 RGD resistant perfluoroelastomer

Excellent all-around performance in harsh oil and gas environments

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Natural rubber (NR)

  • High strength with good abrasion resistance
  • Suitable for use with hot/cold water, ammonia, ethylene glycol, dilute acids and alkalis
  • Synthetic rubbers have superior resistance to heat, weathering and oils
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Nitrile (NBR)

  • We have a vast range of compounds based on various acrylonitrile/butadiene ratios
  • Stocked O-ring grade: PB80, for use with mineral oils - especially hydraulic fluids - water and some solvents
  • Our Proteus grade is generally suitable for aqueous food applications
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O-rings for oil and gas duties

Vast range in general and RGD-resistant materials

  • Precision moulded in over 100 elastomer grades
  • International, national and industry standard rings
  • Many thousands of different types and sizes stocked
  • All popular sizes ex-stock in RGD-resistant materials
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Polyurethane (AU/EU)

  • Good mechanical properties - often used for drive transmissions
  • Excellent resistance to weathering
  • Good resistance to hydrocarbon fuels and mineral oils
  • Sealing duties limited by stress relaxation above +50°C
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Silicone (VMQ)

  • Good resistance to heat, weathering and compression set
  • Excellent electrical resistance
  • Sealing duties limited by high gas permeability, low tensile strength and poor resistance to tear and abrasion
  • Stocked O-ring grade: SIL 80/2
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