4259-514AD MINNESOTA RUBBER QUAD RING

Part number VQ4259 is an AS568-259 black Viton® (FKM) 75 Shore A quad profile Quad-Ring measuring an inside diameter of 6.234 in (158.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.512 in (165.4 mm). A quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

This material stands up to aggressive chemicals, chlorinated solvents, and many acids. Viton® (FKM) offers excellent resistance to compression set and permeation, long service life in hot, chemically aggressive environments. 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 low-molecular-weight organic acids or hot water and steam.

Maintenance and OEM teams specify it across chemical processing, oil and gas, and semiconductor equipment.

Stocked as VQ4259 and sold individually. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.