Q-239 FLUOROELASTOMER 75 Q RING

Ordered as QV70239, this is an AS568-239 black Viton® (FKM) 75 Shore A Quad-Ring with an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm). The quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Viton® (FKM) is specified here for very low compression set at elevated temperature and outstanding high-temperature capability. Expect good resistance to many acids, chlorinated solvents, and aromatic hydrocarbons. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

You will find this material specified across semiconductor equipment, automotive fuel systems, and aerospace.

Reference part number QV70239 when ordering; the item is sold individually. Unit weight is approximately 6.0375 g and nominal inside diameter is listed as 3 5/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.