568-328 GREEN HNBR (HSN) 70 ORINGS

HS70328 is an AS568-328 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring built to an inside diameter of 1.85 in (46.99 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.27 in (57.66 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

HNBR (Hydrogenated Nitrile) is specified here for oil resistance of nitrile with substantially better heat capability, long service life in refrigerant and oilfield duty. This material stands up to petroleum oils and fuels, heat and oxidation, and sour gas and amine inhibitors. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Applications involving chlorinated hydrocarbons or strong oxidizing acids call for a different compound.

You will find this material specified across automotive air conditioning, oilfield and downhole equipment, and commercial refrigeration.

This item is sold individually under part number HS70328. Nominal inside diameter is listed as 1 7/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.