8-213 BLACK FKM 90D BACK-UP RING

Ordered as VBU90213, this is an AS568-213 black Viton® (FKM) 90 Shore A Back-Up Ring supplied with an inside diameter of 0.921 in (23.39 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.199 in (30.45 mm). The back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

Viton® (FKM) offers the industry benchmark where nitrile reaches its thermal limit and long service life in hot, chemically aggressive environments. Expect good resistance to petroleum oils and fuels, chlorinated solvents, and aggressive chemicals. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C).

You will find this material specified across aerospace, chemical processing, and high-temperature process equipment.

VBU90213 ships individually. Unit weight is approximately 1.4226 g. 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.