Q-427 FLUOROELASTOMER 75 Q RING

Ordered as QV70427, this is an AS568-427 black Viton® (FKM) 75 Shore A Quad-Ring supplied with an inside diameter of 4.725 in (120.02 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.275 in (133.99 mm). The quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

Viton® (FKM) is widely chosen for very low compression set at elevated temperature and the industry benchmark where nitrile reaches its thermal limit. It resists chlorinated solvents, petroleum oils and fuels, and many acids. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where hot water and steam or amines are present. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

Maintenance and OEM teams specify it across oil and gas, semiconductor equipment, and automotive fuel systems.

QV70427 ships individually. Unit weight is approximately 31.728 g and nominal inside diameter is listed as 4 3/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.