568-441 FKM 75 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-441 black Viton® (FKM) 70 Shore A measuring an inside diameter of 6.975 in (177.17 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.525 in (191.14 mm), catalogued under part number SV70441. It presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

Viton® (FKM) is widely chosen for outstanding high-temperature capability, excellent resistance to compression set and permeation. The compound resists aromatic hydrocarbons, many acids, and engine and transmission fluids. 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 ketones and esters or low-molecular-weight organic acids. The profile itself contributes a flat contact band that spreads sealing load across a wider area 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.

Common environments for this compound include semiconductor equipment, high-temperature process equipment, and chemical processing.

This item is sold individually under part number SV70441. Nominal inside diameter is listed as 7 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.