8-027 BLACK FKM 90D BACK-UP RING

This back-up ring is supplied in AS568-027 black Viton® (FKM) 90 Shore A supplied with an inside diameter of 1.301 in (33.05 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.441 in (36.6 mm), catalogued under part number VBU90027. It allows a standard o-ring to operate at higher pressures than it could unsupported.

The compound resists aggressive chemicals, aromatic hydrocarbons, and petroleum oils and fuels. That behavior comes from the compound itself: Viton® (FKM) is valued for the industry benchmark where nitrile reaches its thermal limit, excellent resistance to compression set and permeation. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). Exposure to hot water and steam or amines will shorten service life.

It sees regular use in semiconductor equipment, automotive fuel systems, and oil and gas.

VBU90027 ships individually. Unit weight is approximately 0.3719 g and nominal inside diameter is listed as 1 5/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.