8-459 BLACK FKM 90D BACK-UP RING

This back-up ring is supplied in AS568-459 black Viton® (FKM) 90 Shore A measuring an inside diameter of 14.975 in (380.37 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 15.525 in (394.34 mm), catalogued under part number VBU90459. It allows a standard o-ring to operate at higher pressures than it could unsupported.

Expect good resistance to petroleum oils and fuels, aggressive chemicals, and aromatic hydrocarbons. Viton® (FKM) delivers excellent resistance to compression set and permeation, the industry benchmark where nitrile reaches its thermal limit. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with amines or hot water and steam.

Common environments for this compound include automotive fuel systems, oil and gas, and chemical processing.

Stocked as VBU90459 and sold individually. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.