Q-389 FLUOROELASTOMER 75 Q RING

This quad-ring is supplied in AS568-389 black Viton® (FKM) 75 Shore A measuring an inside diameter of 19.953 in (506.81 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 20.373 in (517.47 mm), catalogued under part number QV70389. It seats in a standard o-ring gland while offering improved dynamic performance.

Viton® (FKM) is widely chosen for outstanding high-temperature capability and very low compression set at elevated temperature. This material stands up to aggressive chemicals, many acids, and petroleum oils and fuels. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Exposure to amines or low-molecular-weight organic acids will shorten service life. The profile itself contributes a parting line located away from the sealing surface and lower compressive load required to achieve a seal.

You will find this material specified across oil and gas, chemical processing, and aerospace.

Order part number QV70389, sold individually. Nominal inside diameter is listed as 20 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.