568-232 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-232 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 2.734 in (69.44 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.012 in (76.5 mm), catalogued under part number SH70232. It seals with a broad flat contact band instead of the line contact of a round-section ring.

Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Expect good resistance to greases and lubricants, petroleum-based oils, and hydraulic fluids. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving strong acids or ozone and direct sunlight call for a different compound. 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 hydraulic and pneumatic systems, agricultural equipment, and construction equipment.

Reference part number SH70232 when ordering; the item is sold individually. Unit weight is approximately 3.2921 g and nominal inside diameter is listed as 2 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design.