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The Chesterton® PLS Resists Leakage in Chemical Plant


Case study APAC0031 – Chesterton products – Chesterton EPS

Chesterton - Global Solutions, Local Service



A client in the chemical industry was struggling with bearing housing on a chemical pump leaking due to shaft fretting. They needed a solution that was non-sparking due to the hazardous installation environment, and Chesterton experts suggested the Chesterton® PLS, created by our very own AWC800 material. With easy installation at no additional modification costs, this solution has provided long term results.

Products featured in the case study:

Chesterton® PLS


The bearing housing on a chemical pump had leakage due to shaft fretting from the OEM seal. However, the seal also needed to be non-sparking due to hazardous area installation.

Before installation.



The Chesterton PLS with non-sparking material seal was proposed with was able to be installed without additional costs (no pump modifications needed).

Chesterton® PLS—Polymer Labyrinth Seal

Made from Chesterton’s proprietary polymer material technology, the Chesterton, patent-pending Polymer Labyrinth Seal (PLS) is a non-contact bearing seal designed to provide protection for pumps, motors, gearboxes, and other rotating equipment in splash applications. The unique design eliminates fretting caused by conventional lip seals, and helps increase bearing and gearbox life by extending the mean time between equipment repairs.

Chesterton® PLS


Client Reported

The Chesterton PLS is still working after 7 years. The customer has now adopted this solution for other pumps as follows:

PLS TYPE2 35X55X10 AWC800

PLS TYPE2 80X105X13 AWC800

Featured Material

AWC800 Elastomer Material

Proprietary, Wear-Resistant Urethane

Chesterton’s premium-grade thermoset polyurethane, AWC800, is designed for high performance sealing in hydraulic, pneumatic and static applications.

AWC800 material.

About Us

Chesterton global solutions, local service

Chesterton® is a world leader in helping process industry companies and manufacturers improve the reliability and efficiency of their rotating, stationary, and fluid power equipment platforms. We are known across a wide range of industries for our award-winning pump and valve sealing solutions, applications expertise, equipment maintenance and wear-prevention products, and knowledgeable hands-on local service​.

Mentioned in this case study:


Exclusive Distributor of Chesterton products – Japan



® Registered trademark owned by A.W. Chesterton Company
Case Study APAC0031 – Issued 08/21

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