8-034 BLACK FKM 90D BACK-UP RING

Part number VBU90034 is an AS568-034 black Viton® (FKM) 90 Shore A Back-Up Ring with an inside diameter of 2.114 in (53.7 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 2.254 in (57.25 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

As a material, Viton® (FKM) is valued for outstanding high-temperature capability and long service life in hot, chemically aggressive environments. It resists petroleum oils and fuels, many acids, and chlorinated solvents. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C).

It sees regular use in chemical processing, semiconductor equipment, and high-temperature process equipment.

Reference part number VBU90034 when ordering; the item is sold individually. Nominal inside diameter is listed as 2 1/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.