*4339-514AD MINNESOTA RUBBER QUAD RING

The VQ4339 is an AS568-339 black Viton® (FKM) 75 Shore A quad profile Quad-Ring built to an inside diameter of 3.225 in (81.92 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.645 in (92.58 mm). This quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Viton® (FKM) is specified here for excellent resistance to compression set and permeation, industry benchmark where nitrile reaches its thermal limit. The compound resists chlorinated solvents, engine and transmission fluids, and aromatic hydrocarbons. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in amines or low-molecular-weight organic acids.

Common environments for this compound include aerospace, automotive fuel systems, and chemical processing.

Reference part number VQ4339 when ordering; the item is sold individually. Nominal inside diameter is listed as 3 1/4. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.