Pump Bearing Protection

Maximize Pump Life

The Importance of Bearing Protection

Pumps are vital to the industrial process and designed to operate for many years, yet they consistently come out of service due to product leakage from mechanical seal failure. Mechanical seals can fail as a result of axial movement and shaft deflection caused by bearing damage.

Protect against bearing damage to significantly increase pump reliability.

Pump with Inpro/Seal Bearing Isolator
Rendering of a leaking lip seal on a motor or pump application

The High Cost of Contact Seals

Contact seals, such as lip seals, are commonly used on pumps to seal the bearing housing. Yet, due to their contacting nature, they wear at the point of contact or groove the shaft, rendering them ineffective in a short period of time. This allows lubrication to escape and contamination to enter the bearing housing.

The resulting bearing damage causes axial movement and shaft deflection, which in turns causes the mechanical seal to fail. The end result is catastrophic equipment failure.

A Permanent Sealing Solution

Invented in 1977, the Inpro/Seal Bearing Isolator has been increasing pump reliability through permanent bearing protection for over 40 years. The Inpro/Seal Bearing Isolator is a non-contacting compound labyrinth seal designed with proven, innovative features to permanently protect against contamination ingress and lubrication loss.

Designed to last the lifetime of your pump, Inpro/Seal Bearing Isolators significantly increase mean time between repair (MTBR) and decrease maintenance costs.

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VB45-S Bearing Isolator

To learn how it works, watch our Bearing Isolator video.

Bearing Isolator Designs for Pumps

VB45-S Bearing Isolator


The IP66 rated VB45-S Bearing Isolator is the next step in Bearing Isolator technology and the standard design for pumps.
VB45-U Bearing Isolator


The IP66 rated VB45-U Bearing Isolator is a robust design for severe environments, including oil splash, oil mist and grease.
VBMag Bearing Isolator Cutaway


The VBMag Bearing Isolator utilizes magnetic force to provide maximum bearing protection in oil mist environments.

Facts at a Glance

Inpro/Seal Bearing Isolators on pumps:

  • Are IP66 rated, permanently protecting against contamination ingress
  • Protect against lubrication loss for multiple lubrication types
  • Increase bearing life and reliability
  • Can be installed on a majority of pump types
  • Lower emissions by sealing against harmful VOCs
  • Are backed by our best-in-class performance guarantee
Same day shipment paperwork

Same-Day Shipments

Inpro/Seal is committed to making sure you have the right technology, right when you need it. We know that time is money. That’s why we offer same-day shipments on most Bearing Isolators, even new and custom designs. If you require same-day shipments on an Inpro/Seal Bearing Isolator, contact your local Inpro/Seal Representative.

Increase Reliability. Decrease Costs.

Inpro/Seal increases reliability and enhances performance on rotating equipment across multiple industries with permanent bearing protection and complete shaft seals. Read more about our innovative technologies or the industries we serve.

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Ready to Get Started?

Count on us to improve pump reliability through permanent bearing protection. With over 40 years of experience, we are the trusted source of Bearing Isolator technology.

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