Hydrogenated nitrile (HNBR) Elast-O-Lion® is James Walker's registered trademark for its range of high performance hydrogenated nitrile elastomers.
Chemical properties These materials have the excellent oil and fuel resistance of traditional nitrile (NBR) elastomers. In addition they display superior resistance to aggressive fluids such as sour (H2S) crude oil, lubricating oil additives and amine corrosion inhibitors. Fully saturated grades of HNBR have excellent resistance to ozone.
Typical operating temperatures -25°C to +160°C continuous, or +200°C intermittent. Grades are available for continuous operation down to -40°C and lower, usually at the expense of the upper temperature limit.
Sealing duties Elast-O-Lion® materials have have superior mechanical properties and outstanding wear resistance in dynamic sealing applications. They can sustain higher service temperatures than traditional nitrile, such as up to +180°C in oil.
James Walker standard range Five ranges are available with various acrylonitrile content from low to ultra-high, and hardnesses of 50-90 IRHD.
In addition, four grades - Elast-O-Lion® 101, 201, 301 and 985 - have been developed specially for oilfield duties where a combination of high mechanical strength, explosive decompression (ED) resistance, and chemical resistance is required.
Elast-O-Lion® 101 is Norsok M-710 qualified for ED resistance and sour gas (H2S) ageing.
Stocked 'O' ring grades Elast-O-Lion® 101, 180 and 985.
