Q-204 FLUOROELASTOMER 75 Q RING

Ordered as QV70204, this is an AS568-204 black Viton® (FKM) 75 Shore A Quad-Ring with an inside diameter of 0.359 in (9.12 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.637 in (16.18 mm). The 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 and outstanding high-temperature capability. The material holds up against aromatic hydrocarbons, chlorinated solvents, and petroleum oils and fuels. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). The profile itself contributes two sealing bands per contact face rather than one and resistance to the spiral twisting that defeats round-section rings.

It sees regular use in oil and gas, automotive fuel systems, and high-temperature process equipment.

QV70204 ships individually. Nominal inside diameter is listed as 3/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.