240 Quad Ring (X-Ring) 3-3/4Id X 4Od 70 Duro Round Black

Nitrile Rubber Also Known As Nbr Or Buna N Is One Of The Most Commonly Used Sealing Elastomers Due To Its Resistance To Petroleum-Based Fuels And Lubricants And Its Relatively Low Price.

Nitrile Elastomers Are Copolymers Of Acrylonitrile And Butadiene.

There Are A Number Of Common Variations Of Nitrile Compounds.

Ul Style""Margin-Top0Px;Padding-Top 5Px; Padding-Bottom 5Px;"" Acrylonitrile Content The Acrylonitrile (Acn) Content Of The Polymer Chains Can Be Varied From 18 To 50.

Lower Acn Content Gives Better Low-Temperature Properties But Poorer Fuels And Polar Lubricants.

Higher Acn Content Gives Poorer Low-Temperature Properties But Improved Fuels And Polar Lubricants Resistance.

Standard Nbrs Typically Have 34 Acn Content.

Cure System Sulfur-Cured Standard Nitriles Are Usually Sulfur-Cured.

Sulfur-Cured Compounds Offer Better Low-Temperature Properties But Are More Prone To Hardening With High Temperatures.

Peroxide-Cured Nitriles Have Better Heat Resistance And Lower Compression Sets But Are More Expensive And More Difficult To Process.

Temperature Rangeul Style""Margin-Top0Px;Padding-Top 5Px; Padding-Bottom 5Px;"" Standard Low Temp -40°C (-40°F) Standard High Temp 100°C (212°F)