568-390 HSN90 DURO ORINGS

Ordered as HSN90390, this is an AS568-390 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring built to an inside diameter of 20.953 in (532.21 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 21.373 in (542.87 mm). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

This material stands up to sour gas and amine inhibitors, petroleum oils and fuels, and ozone and weathering. HNBR (Hydrogenated Nitrile) is specified for improved ozone and weathering resistance over standard nitrile, long service life in refrigerant and oilfield duty. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C).

Common environments for this compound include automotive air conditioning, commercial refrigeration, and heavy-duty powertrain.

HSN90390 ships individually. Nominal inside diameter is listed as 21 inch. Check the compound against your process media, pressure and temperature before committing to a design.