8-462 BLACK FKM 90D BACK-UP RING

This back-up ring is supplied in AS568-462 black Viton® (FKM) 90 Shore A supplied with an inside diameter of 16.455 in (417.96 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 17.005 in (431.93 mm), catalogued under part number VBU90462. It bridges the extrusion gap so the primary seal holds its shape under load.

Viton® (FKM) is specified here for very low compression set at elevated temperature and long service life in hot, chemically aggressive environments. It resists petroleum oils and fuels, many acids, and chlorinated solvents. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service.

Typical settings include oil and gas, semiconductor equipment, and automotive fuel systems.

Reference part number VBU90462 when ordering; the item is sold individually. Nominal inside diameter is listed as 16 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.