Q-372 FLUOROELASTOMER 75 Q RING

QV70372 is an AS568-372 black Viton® (FKM) 75 Shore A Quad-Ring supplied with an inside diameter of 8.725 in (221.62 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 9.145 in (232.28 mm). In service, this quad-ring provides a dual sealing band on each contact face for improved reliability.

Viton® (FKM) is specified here for industry benchmark where nitrile reaches its thermal limit, excellent resistance to compression set and permeation. It resists aggressive chemicals, chlorinated solvents, and aromatic hydrocarbons. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Applications involving low-molecular-weight organic acids or amines call for a different compound. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and a parting line located away from the sealing surface.

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

Stocked as QV70372 and sold individually. Nominal inside diameter is listed as 8 3/4 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.