-391 BLACK FKM 90D O-RING

V90391 is an AS568-391 black Viton® (FKM) 90 Shore A O-Ring with an inside diameter of 21.953 in (557.61 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 22.373 in (568.27 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The compound resists chlorinated solvents, many acids, and aromatic hydrocarbons. Viton® (FKM) is specified for outstanding high-temperature capability, excellent resistance to compression set and permeation. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in low-molecular-weight organic acids or ketones and esters.

Common environments for this compound include aerospace, oil and gas, and semiconductor equipment.

Order part number V90391, sold individually. Unit weight is approximately 71.4977 g and nominal inside diameter is listed as 22 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.