Q-391 FLUOROELASTOMER 75 Q RING

Part number QV70391 is an AS568-391 black Viton® (FKM) 75 Shore A Quad-Ring built to an inside diameter of 21.953 in (557.61 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 22.373 in (568.27 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

Viton® (FKM) offers long service life in hot, chemically aggressive environments and the industry benchmark where nitrile reaches its thermal limit. Expect good resistance to chlorinated solvents, engine and transmission fluids, 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 ketones and esters will shorten service life. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and two sealing bands per contact face rather than one.

Common environments for this compound include oil and gas, semiconductor equipment, and aerospace.

Order part number QV70391, sold individually. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.