'O' rings for oil & gas duties

Vast range in general & RGD-resistant materials

• Precision moulded in over 100 elastomer grades.
• International, national and industry standard rings.
• Many thousands of different types & sizes stocked.
• All popular sizes ex-stock in RGD-resistant materials.

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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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DuPont™ 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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DuPont™ Viton® (FKM)

• See Fluoroelastomers entry.

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Dyneon™ (FKM)

• See Fluoroelastomers entry.

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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 & 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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Fluolion® (PTFE)

• Polytetrafluoroethylene has outstanding resistance to virtually all media.
• Excellent material for 'O' ring back-up rings.
• Flow characteristics limit its use for 'O' ring seals.

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Fluoroelastomers (FKM)

• Viton®, Tecnoflon® and Dyneon™ are well-known compounds.
• Suitable for severe chemical conditions and high temperatures.
• FR25/90, FR58/90 and FR68/90 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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Hydrogenated nitrile (HNBR)

• See Elast-O-Lion® entry.

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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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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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Tecnoflon® (FKM)

• See Fluoroelastomers entry.

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