High Quality NBR Rubber Oil Seal

   * Oil Seals prevent lubricants from escaping, keep contaminants from entering and help stop intermixture of different mediums.Oil seals can be made from paper, real or synthetic rubber and can be found wrapped around shafts in a variety of effective ways. But in addition to sealing two surfaces, an O ring can also provide lubrication, depending on its material, such as between a piston and the piston wall.

   *An O ring is a simple form of a seal. It closes off a gap between two surfaces so that liquids or gases cannot pass through in any direction. The shape of an O ring is akin to that of a doughnut - or torus in its correct mathematical description - from which it derives its name. It is usually made from an elastomer; a viscous and elastic polymer that is a synthetic rubber or it may be formed from some other kind of thermoplastic material such as PTFE that is able to return to its original shape after being compressed.