Q-443 FLUOROELASTOMER 75 Q RING

Part number QV70443 is an AS568-443 black Viton® (FKM) 75 Shore A Quad-Ring supplied with an inside diameter of 7.475 in (189.87 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.025 in (203.84 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Viton® (FKM) offers very low compression set at elevated temperature and outstanding high-temperature capability. Expect good resistance to aggressive chemicals, chlorinated solvents, and aromatic hydrocarbons. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Applications involving amines or ketones and esters call for a different compound. The profile itself contributes lower compressive load required to achieve a seal and a parting line located away from the sealing surface.

Maintenance and OEM teams specify it across automotive fuel systems, semiconductor equipment, and high-temperature process equipment.

QV70443 ships individually. Unit weight is approximately 48.581 g and nominal inside diameter is listed as 7 1/2 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.