1. Sealink Corp. Sealing Systems : Nonlinear contact are based on Elastohydrodynamic lubrication by Reynolds equation.
2. Magnetic Fluid Sealing Systems : Use a permanent magnetic and teeth cut either on the shaft, or occasionally, on the stationary pole-piece to create a localized magnetic field gradient in a small radial gap between the shaft's teeth and the stationary pole-piece.
3. Mechanical Sealing Systems : A contact sealing face composed of soft, sacrificial face material forms a seal against a hard material.
