Q-430 BUNA 70 Q RING

Ordered as QH70430, this is an AS568-430 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring built to an inside diameter of 5.1 in (129.54 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.65 in (143.51 mm). The quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

The compound resists propane and butane, water, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or polar solvents.

It sees regular use in hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.

Reference part number QH70430 when ordering; the item is sold individually. Unit weight is approximately 19.894 g and nominal inside diameter is listed as 5 1/8 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.