8-455 BLACK BUNA 90D BACK-UP RING

Ordered as HB90455, this is an AS568-455 black Buna-N (Nitrile) 90 Shore A Back-Up Ring supplied with an inside diameter of 12.975 in (329.57 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 13.525 in (343.54 mm). The back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

As a material, Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. This material stands up to propane and butane, petroleum-based oils, and greases and lubricants. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in agricultural equipment, hydraulic and pneumatic systems, and automotive.

This item is sold individually under part number HB90455. Unit weight is approximately 22.557 g and nominal inside diameter is listed as 13 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.