4228-366Y MINNESOTA RUBBER QUAD RING

APG stocks the HQ4228, an AS568-228 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 2.234 in (56.74 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.512 in (63.8 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

The material holds up against many alcohols, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) delivers strong abrasion and tear resistance, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to strong acids or ozone and direct sunlight will shorten service life. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and two sealing bands per contact face rather than one.

Typical settings include construction equipment, agricultural equipment, and automotive.

Stocked as HQ4228 and sold individually. Nominal inside diameter is listed as 2 1/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.