Q-156 FLUOROELASTOMER 75 Q RING

APG stocks the QV70156, an AS568-156 black Viton® (FKM) 75 Shore A Quad-Ring with an inside diameter of 4.237 in (107.62 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.443 in (112.85 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Viton® (FKM) is specified here for industry benchmark where nitrile reaches its thermal limit, excellent resistance to compression set and permeation. The material holds up against chlorinated solvents, aromatic hydrocarbons, and petroleum oils and fuels. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where amines or hot water and steam are present. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

Common environments for this compound include high-temperature process equipment, chemical processing, and aerospace.

Reference part number QV70156 when ordering; the item is sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.