Sealing Devices Phone Number

Request Info

If you see this, do not fill out this input field

Sealing Devices Product literature
Rather Talk with an Engineer?
Buy Now Browse Catalog

Buna-N nitrile NBR O-Rings

Buna-N Nitrile nbr O-rings general purpose sealing

Buna O-rings, Nitrile O-rings, NBR O-rings offer excellent sealing and mechanical properties at low cost. Buna Nitrile O-rings have resistance to common lubricants and are recommended for crude oil, gasoline, propane, petroleum oils and water.  Nitrile Buna O-rings are used in engines, gearboxes, aircraft pumps, and water applications.

Nitrile Buna-N NBR O-Rings are used as a face-to-face and shaft seals, and allow rotary and linear movement. Nitrile O-rings have good tear and abrasion resistance with operating temperature: -30° to +250F° (can be higher with special compounds).Buna-N Nitrile O-Rings

Buna-N / Nitrile / NBR O-rings are available in different colors, durometers and compounds for specific applications sealing and aesthetic requirements. 

Parker Buna-N, Nitrile o-rings are recommended for petroleum based oils and fluids, mineral oils, ethylene glycol base fluids, silicone and di-ester base lubricants, air, water under 150°F, and natural gas.  A common Parker nitrile o-ring compound is N0674 Black.

Nitrile / Buna / NBR o-rings have limitations to ozone, sunlight and weathering and aren't good in strong acids, aircraft and automobile brake systems, or ketones. Parker's Nitrile rubber (NBR) acrylonitrile content varies considerably (18% to 50%), and the higher the acrylonitrile content, the better oil and fuel resistance although elasticity and compression set resistance may be adversely affected. NBR has good mechanical and wear resistance properties.

• Heat and wear resistance
• Up to 100°C (212°F) with shorter life @ 121°C (250°F)
• Cold flexibility
• Depending on individual compound, between -34°C and -57°C (-30°F and -70°F)
• Chemical resistance
• Aliphatic hydrocarbons (propane, butane, petroleum oil, mineral oil and grease, diesel fuel, fuel oils) vegetable and mineral oils and greases
• HFA, HFB and HFC hydraulic fluids
• Dilute acids, alkali and salt solutions at low temperatures
• Water (special compounds up to 100°C) (212°F)
• Used for General Purpose, MIL-G-21569 CL 1, UL Listed  

Call now - 800-727-3257