Q-331 BUNA 70 Q RING

APG stocks the QH70331, an AS568-331 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 2.225 in (56.52 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.645 in (67.18 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. This material stands up to many alcohols, water, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in strong acids or ketones. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

Typical settings include fluid power, general industrial maintenance, and hydraulic and pneumatic systems.

This item is sold individually under part number QH70331. Unit weight is approximately 5.35 g and nominal inside diameter is listed as 2 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.