568-391 HSN90 DURO ORINGS

Part number HSN90391 is an AS568-391 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring supplied with 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). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The material holds up against heat and oxidation, sour gas and amine inhibitors, and petroleum oils and fuels. HNBR (Hydrogenated Nitrile) offers strong resistance to rapid gas decompression and the oil resistance of nitrile with substantially better heat capability. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). Exposure to ketones or chlorinated hydrocarbons will shorten service life.

It sees regular use in engine timing systems, commercial refrigeration, and oilfield and downhole equipment.

Order part number HSN90391, sold individually. Nominal inside diameter is listed as 22 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.