8-230 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-230 black Buna-N (Nitrile) 90 Shore A with an inside diameter of 2.484 in (63.09 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.762 in (70.15 mm), catalogued under part number HB90230. It allows a standard o-ring to operate at higher pressures than it could unsupported.

The compound resists water, petroleum-based oils, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or ozone and direct sunlight will shorten service life.

Common environments for this compound include general industrial maintenance, construction equipment, and agricultural equipment.

This item is sold individually under part number HB90230. Unit weight is approximately 0.9598 g. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.