Q-218 FLUOROELASTOMER 75 Q RING

Ordered as QV70218, this is an AS568-218 black Viton® (FKM) 75 Shore A Quad-Ring measuring an inside diameter of 1.234 in (31.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.512 in (38.4 mm). The quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Viton® (FKM) is known for excellent resistance to compression set and permeation, very low compression set at elevated temperature. The compound resists engine and transmission fluids, chlorinated solvents, and aromatic hydrocarbons. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. It should not be specified for service in ketones and esters or low-molecular-weight organic acids. The profile itself contributes lower compressive load required to achieve a seal and resistance to the spiral twisting that defeats round-section rings.

It sees regular use in automotive fuel systems, aerospace, and semiconductor equipment.

This item is sold individually under part number QV70218. Unit weight is approximately 2.1216 g and nominal inside diameter is listed as 1 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design.