568-435 FKM 75 SQUARE CUT RINGS

Ordered as SV70435, this is an AS568-435 black Viton® (FKM) 70 Shore A Square-Cut Ring supplied with an inside diameter of 5.725 in (145.42 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.275 in (159.39 mm). The square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

The compound resists petroleum oils and fuels, many acids, and chlorinated solvents. Viton® (FKM) is known for the industry benchmark where nitrile reaches its thermal limit, excellent resistance to compression set and permeation. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with amines or hot water and steam. The profile itself contributes a flat contact band that spreads sealing load across a wider area and a rectangular section that will not roll in the groove. 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 aerospace, high-temperature process equipment, and oil and gas.

SV70435 ships individually. Nominal inside diameter is listed as 5 3/4 inch. 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.