8-453 BLACK FKM 90D BACK-UP RING

The VBU90453 is an AS568-453 black Viton® (FKM) 90 Shore A Back-Up Ring with an inside diameter of 11.975 in (304.17 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 12.525 in (318.14 mm). This back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

Viton® (FKM) is specified for very low compression set at elevated temperature and outstanding high-temperature capability. It resists petroleum oils and fuels, chlorinated solvents, and aggressive chemicals. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with low-molecular-weight organic acids or hot water and steam.

You will find this material specified across aerospace, semiconductor equipment, and oil and gas.

Stocked as VBU90453 and sold individually. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.