Q-205 FLUOROELASTOMER 75 Q RING

This quad-ring is supplied in AS568-205 black Viton® (FKM) 75 Shore A measuring an inside diameter of 0.421 in (10.69 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.699 in (17.75 mm), catalogued under part number QV70205. It uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

The compound resists chlorinated solvents, aggressive chemicals, and many acids. Viton® (FKM) is specified for very low compression set at elevated temperature and long service life in hot, chemically aggressive environments. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with ketones and esters or low-molecular-weight organic acids. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and two sealing bands per contact face rather than one.

You will find this material specified across aerospace, oil and gas, and semiconductor equipment.

This item is sold individually under part number QV70205. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.