568-367 FKM 75 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-367 black Viton® (FKM) 70 Shore A measuring an inside diameter of 7.475 in (189.87 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 7.895 in (200.53 mm), catalogued under part number SV70367. It seals with a broad flat contact band instead of the line contact of a round-section ring.

The material holds up against aggressive chemicals, many acids, and petroleum oils and fuels. That behavior comes from the compound itself: Viton® (FKM) is known for very low compression set at elevated temperature, excellent resistance to compression set and permeation. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). It is not the right choice where ketones and esters or amines are present. The profile itself contributes a rectangular section that will not roll in the groove 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.

It sees regular use in high-temperature process equipment, chemical processing, and automotive fuel systems.

SV70367 ships individually. Nominal inside diameter is listed as 7 1/2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.