Q-335 FLUOROELASTOMER 75 Q RING

This quad-ring is supplied in AS568-335 black Viton® (FKM) 75 Shore A measuring an inside diameter of 2.725 in (69.22 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.145 in (79.88 mm), catalogued under part number QV70335. It uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

As a material, Viton® (FKM) is known for excellent resistance to compression set and permeation, the industry benchmark where nitrile reaches its thermal limit. The material holds up against engine and transmission fluids, chlorinated solvents, and aggressive chemicals. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. Applications involving ketones and esters or hot water and steam call for a different compound. The profile itself contributes two sealing bands per contact face rather than one and resistance to the spiral twisting that defeats round-section rings.

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

This item is sold individually under part number QV70335. Unit weight is approximately 9.83 g and nominal inside diameter is listed as 2 3/4 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.