*4391-366Y MINNESOTA RUBBER QUAD RING

Ordered as HQ4391, this is an AS568-391 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 21.953 in (557.61 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 22.373 in (568.27 mm). The quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. The compound resists propane and butane, water, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where polar solvents or strong acids are present. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

Typical settings include agricultural equipment, automotive, and hydraulic and pneumatic systems.

This item is sold individually under part number HQ4391. Nominal inside diameter is listed as 22 inch. Review your operating media and conditions against this specification before installation.