Q-348 FLUOROELASTOMER 75 Q RING

APG stocks the QV70348, an AS568-348 black Viton® (FKM) 75 Shore A Quad-Ring supplied with an inside diameter of 4.35 in (110.49 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.77 in (121.16 mm). A 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 excellent resistance to compression set and permeation, very low compression set at elevated temperature. The material holds up against engine and transmission fluids, aromatic hydrocarbons, and aggressive chemicals. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. Verify compatibility before use with amines or ketones and esters. The profile itself contributes lower compressive load required to achieve a seal and a parting line located away from the sealing surface.

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

This item is sold individually under part number QV70348. Unit weight is approximately 17.009 g and nominal inside diameter is listed as 4 3/8 inch. Check the compound against your process media, pressure and temperature before committing to a design.