Labyrinth Seal


grease or lip seal is shown in the top half of the drawing, the labyrinth is shown in the bottom half of the drawing

  • A labyrinth seal is a non-contacting circumferential seal utilizing a tortured path for flow between the stationary and rotating parts. The design utilizes a series of pressure drops to reduce the leakage.
  • The labyrinth seal is effective while the pump is running, but when the pump stops you are trying to seal with a hole unless you have purchased a design with a static sealing feature. In most cases a positive face seal would be a better choice in most of these applications.

See: Positive face seal for bearings, P021