8-325 BLACK FKM 90D BACK-UP RING

Part number VBU90325 is an AS568-325 black Viton® (FKM) 90 Shore A Back-Up Ring supplied with an inside diameter of 1.475 in (37.47 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.895 in (48.13 mm). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.

Viton® (FKM) delivers excellent resistance to compression set and permeation, long service life in hot, chemically aggressive environments. Expect good resistance to chlorinated solvents, engine and transmission fluids, and petroleum oils and fuels. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with hot water and steam or amines.

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

Order part number VBU90325, sold individually. Unit weight is approximately 2.112 g and nominal inside diameter is listed as 1 1/2 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.