568-336 FKM 75 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-336 black Viton® (FKM) 70 Shore A supplied with an inside diameter of 2.85 in (72.39 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.27 in (83.06 mm), catalogued under part number SV70336. It presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

As a material, Viton® (FKM) is valued for outstanding high-temperature capability, excellent resistance to compression set and permeation. Expect good resistance to aggressive chemicals, chlorinated solvents, and aromatic hydrocarbons. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where low-molecular-weight organic acids or hot water and steam are present. The profile itself contributes a flat contact band that spreads sealing load across a wider area and greater resistance to extrusion than a round section of the same size. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

You will find this material specified across semiconductor equipment, automotive fuel systems, and high-temperature process equipment.

SV70336 ships individually. Nominal inside diameter is listed as 2 7/8 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.