*4439-514AD MINNESOTA RUBBER QUAD RING

Ordered as VQ4439, this is an AS568-439 black Viton® (FKM) 75 Shore A quad profile Quad-Ring supplied with an inside diameter of 6.475 in (164.47 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.025 in (178.44 mm). The quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

The compound resists aromatic hydrocarbons, many acids, and aggressive chemicals. That behavior comes from the compound itself: Viton® (FKM) offers long service life in hot, chemically aggressive environments, excellent resistance to compression set and permeation. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Applications involving hot water and steam or amines call for a different compound.

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

Stocked as VQ4439 and sold individually. Review your operating media and conditions against this specification before installation. 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.