8-111 BLACK FKM 90D BACK-UP RING

APG stocks the VBU90111, an AS568-111 black Viton® (FKM) 90 Shore A Back-Up Ring measuring an inside diameter of 0.424 in (10.77 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.63 in (16 mm). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.

As a material, Viton® (FKM) is valued for excellent resistance to compression set and permeation, outstanding high-temperature capability. The material holds up against many acids, aggressive chemicals, and chlorinated solvents. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C).

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

This item is sold individually under part number VBU90111. Unit weight is approximately 0.3771 g and nominal inside diameter is listed as 7/16 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.