STS Bearing Isolator

A superior sealing solution for applications with flooded shafts.

Applications with flooded shafts, specifically gearboxes and pumps, are some of the most difficult applications to seal. Non-contacting seals cannot effectively seal pressure, allowing oil to leak to atmosphere. Contact seals are the preferred sealing method; however, they lose effectiveness in a short period of time due to wear. Purged seals are another option, but they can be expensive to purchase and maintain.

The Inpro/Seal STS Bearing Isolator effectively seals applications with flooded shafts through innovative design and technology. Its unique design combines a contact seal with Inpro/Seal’s patented XX Interface to protect against contamination ingress and lubrication loss. To increase seal life expectancy, the contact seal rides on an precision stainless steel rotor, creating a consistent sealing surface and decreasing wear.

STS Bearing Isolator engineering drawing

Technical Data

  • Standard Material – Bearing Bronze and 416 Stainless Steel
  • Axial Movement – 0.13 mm (0.005 in.)
  • Radial Movement – 0.38 mm (0.015 in.)
  • Temperature Range – -26°C (-15°F) to 121°C (250°F)
  • Pressure – 0.34 bar (5 psi)
  • Speed – up to 5,000 sfpm depending on application
  • Standard Overall Length – 19.05 mm (0.750 in.), 22.86 mm (0.900 in.)
  • Shaft Size – 15.88 mm (0.625 in.) to 381 mm (15.000 in.)

Consult an Inpro/Seal representative for operating conditions outside of limits shown.

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