Buna O-rings, NBR or Nitrile O-rings offer excellent sealing properties and mechanical properties with low cost. Buna and Nitrile O-rings have
a basic resistance to common lubricants and are recommended for crude oil, gasoline, propane, petroleum oils and water. Nitrile and Buna
O-rings are used in engines, gearboxes, aircraft pumps, and common water applications.
Nitrile Buna-N NBR O-Rings are used as a face-to-face or 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 increased to higher temperature sealing in special compounds).
Note: Nitrile / Buna / NBR o-rings do have limitations to ozone, sunlight and weathering. They are also not good in strong acids, aircraft or
automobile brake systems, or ketones.