568-234 FKM 75 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-234 black Viton® (FKM) 70 Shore A measuring an inside diameter of 2.984 in (75.79 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.262 in (82.85 mm), catalogued under part number SV70234. It resists the spiral failure that affects round rings on long reciprocating strokes.

It resists petroleum oils and fuels, aromatic hydrocarbons, and engine and transmission fluids. That behavior comes from the compound itself: Viton® (FKM) is widely chosen for long service life in hot, chemically aggressive environments and very low compression set at elevated temperature. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). Exposure to low-molecular-weight organic acids or hot water and steam will shorten service life. The profile itself contributes greater resistance to extrusion than a round section of the same size and simple lathe-cut manufacture at low tooling cost. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

Typical settings include high-temperature process equipment, chemical processing, and oil and gas.

Reference part number SV70234 when ordering; the item is sold individually. Nominal inside diameter is listed as 3 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.