Q-254 BUNA 70 Q RING

Part number QH70254 is an AS568-254 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 5.484 in (139.29 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.762 in (146.35 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, most widely specified general-purpose sealing elastomer. The compound resists petroleum-based oils, many alcohols, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving strong acids or ketones call for a different compound. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and a parting line located away from the sealing surface.

It sees regular use in agricultural equipment, automotive, and construction equipment.

Stocked as QH70254 and sold individually. Unit weight is approximately 5.713 g. Check the compound against your process media, pressure and temperature before committing to a design.