*Q-366 FLUOROELASTOMER 75 Q RING

Ordered as QV70366, this is an AS568-366 black Viton® (FKM) 75 Shore A Quad-Ring built to an inside diameter of 7.225 in (183.52 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 7.645 in (194.18 mm). The quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Viton® (FKM) is specified here for very low compression set at elevated temperature and industry benchmark where nitrile reaches its thermal limit. The material holds up against petroleum oils and fuels, chlorinated solvents, and aromatic hydrocarbons. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Applications involving low-molecular-weight organic acids or hot water and steam call for a different compound. 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 high-temperature process equipment, chemical processing, and oil and gas.

Reference part number QV70366 when ordering; the item is sold individually. Unit weight is approximately 24.5 g and nominal inside diameter is listed as 7 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.