Document Centre Send Us Your Enquiry About Us Industries & Applications Products & Services Contact Us O-rings Materials 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 More Info Butyl (IIR) Very low gas permeability Suitable for vacuum and high pressure applications Must not be used with mineral oils More Info Chloroprene (CR) General purpose elastomer, usually known as neoprene Suitable for use with many media Largely unaffected by sunlight and atmospheric ageing More Info Chlorosulphonyl polyethylene (CSM) Excellent resistance to weathering Gives good service with many media on static sealing duties Suited mainly to static sealing duties More Info 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 More Info 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 More Info Epichlorohydrin (ECO) Good resistance to mineral oils, fuels and ozone Sealing applications limited by corrosive properties and poor compression set resistance More Info 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 More Info 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 More Info Fluorosilicone (FVMQ) Widely used for static seals in aerospace fuel systems Resistant to hydrocarbon oils, petroleum fuels and mineral-based hydraulic fluids More Info Kalrez® 0090 RGD resistant perfluoroelastomer Excellent all-around performance in harsh oil and gas environments More Info 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 More Info 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 More Info 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 More Info 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 More Info 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 More Info Document Centre For industry or application News Desk Case studies, images and news Current Vacancies Global career opportunities Sign up for products and services news Back to top ABOUT US Home About James Walker Our History Procurement News Desk Career Opportunities Customer Satisfaction Contact Us INDUSTRIES & APPLICATIONS Chemical and Petrochemical Construction Defence and Aerospace Engineering and Manufacturing Food and Beverages Marine Propulsion Marine Transportation Metallurgical Mineral Oil and Gas Paper, Pulp and Board Pharmaceutical and Bioprocessing Power Semiconductor and Electronics Valves Water and Waste PRODUCTS & SERVICES Cartridge Seal Systems Compression Packing Critical Metallic Sealing Elastomer Technology Engineering Plastics Environmental Excellence Expansion Joints and Bellows Flange Management and Joint Integrity Flooring and Decking Products Gaskets and Sheet Jointings Hydraulic Sealing Products Mechanical Seals O-rings Ring Type Joints Rotary Seals Seals in PTFE and Engineered Thermoplastics Static Seals Tension Control Bolting Valves Vibration Attenuation Products DOCUMENTS & PAPERS Case Studies Technical Papers and Presentations Document Centre FOLLOW US James Walker on Twitter James Walker on LinkedIn James Walker on YouTube James Walker on Instagram Sign up for products and services news © All contents copyright of James Walker. Part of the James Walker Group. an embado solution CONTACT US | TERMS OF USE | LOGIN