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Increasing equipment reliability in pipeline services


As part of pipeline services, a customer runs pigging systems to clear lines of unwanted materials and also inspects for corrosion. These systems must be cleaned of debris on a regular basis with high-pressure water-based cleaners fed by reciprocating positive displacement pumps. Seals for these pumps must be leak tight and low friction with high cycle performance to handle the pressure which can exceed 35 MPa (5000 psi).

A hydraulic power unit



Chesterton Series 500 (521) Stacked Seal Sets were installed in the gland of the seal against the shaft. The primary seal element was a Spring-Energized Seal (SES) backed by redundant v-rings. Seal materials were made from wear-resistant carbon/graphite filled PTFE. A backup ring made of PEEK was included to prevent seal extrusion under high-pressure. A PEEK hat ring was used to prevent SES damage due to back pressure.


Chesterton Series 500 (521) Stacked Seal Set


Seal performance was verified through functional trial in the positive displacement pumps of the hydraulic power unit.

The Chesterton Series 500 (521) Stacked Seal Sets provided successful sealing for five years before replacement, due to maintenance, was necessary!

Pipeline System

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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. Chesterton product range includes mechanical seals, packing and gaskets, industrial lubricants and coatings.

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Technical data reflects results of laboratory tests and is intended to indicate general characteristics only. A.W. Chesterton Company disclaims all warranties expressed or implied, including warranties of merchantability and fitness for a particular purpose. Liability, if any, is limited to product replacement only. Any images contained herein are for general illustrative or aesthetic purposes only and are not intended to convey any instructional, safety, handling, or usage information or advice respecting any product or equipment. Please refer to relevant Safety Data Sheets, Product Data Sheets, and/or Product Labels for safe use, storage, handling, and disposal of products, or consult with your local Chesterton sales representative.

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