Q-442 BUNA 70 Q RING

This quad-ring is supplied in AS568-442 black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 7.225 in (183.52 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.775 in (197.49 mm), catalogued under part number QH70442. It provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, economical choice for high-volume maintenance programs. The compound resists propane and butane, water, and greases and lubricants. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or ozone and direct sunlight call for a different compound. The profile itself contributes a parting line located away from the sealing surface and lower compressive load required to achieve a seal.

You will find this material specified across hydraulic and pneumatic systems, general industrial maintenance, and agricultural equipment.

QH70442 ships individually. Unit weight is approximately 30.79 g and nominal inside diameter is listed as 7 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.