568-237 FKM 75 SQUARE CUT RINGS

This quad-ring is supplied in AS568-237 black Viton® (FKM) 70 Shore A square profile built to an inside diameter of 3.359 in (85.32 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.637 in (92.38 mm), catalogued under part number SV70237. It resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

It resists petroleum oils and fuels, aromatic hydrocarbons, and many acids. That behavior comes from the compound itself: Viton® (FKM) is specified for the industry benchmark where nitrile reaches its thermal limit and long service life in hot, chemically aggressive environments. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C).

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

Order part number SV70237, sold individually. Nominal inside diameter is listed as 3 3/8 inch. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.