4443-514AD MINNESOTA RUBBER QUAD RING

The VQ4443 is an AS568-443 black Viton® (FKM) 75 Shore A quad profile Quad-Ring supplied with an inside diameter of 7.475 in (189.87 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.025 in (203.84 mm). This quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

This material stands up to chlorinated solvents, many acids, and aromatic hydrocarbons. That behavior comes from the compound itself: Viton® (FKM) is specified for the industry benchmark where nitrile reaches its thermal limit, 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 low-molecular-weight organic acids or amines call for a different compound.

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

Order part number VQ4443, sold individually. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.