Q-427 BUNA 70 Q RING

This quad-ring is supplied in AS568-427 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 4.725 in (120.02 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.275 in (133.99 mm), catalogued under part number QH70427. It resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

As a material, Buna-N (Nitrile) is specified for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Expect good resistance to greases and lubricants, propane and butane, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to strong acids or ozone and direct sunlight will shorten service life. The profile itself contributes two sealing bands per contact face rather than one and a parting line located away from the sealing surface.

Typical settings include construction equipment, general industrial maintenance, and hydraulic and pneumatic systems.

This item is sold individually under part number QH70427. Unit weight is approximately 0.0405 lb. 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.