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Miniature seals provide low torque performance


A company specializing in medical devices builds swivel systems used for infusion and blood sampling in laboratory research. The system must allow 360° rotation and exhibit low torque. The fluid connections are 20 gauge or smaller with the swivel body less than ¼” diameter. Seals for these swivels must be leak tight, low friction, and miniature.

Products featured in this case study:

Chesterton Spring-Energized Seals: 200 Series


A Chesterton Series 200 – Elliptical Spring-Energized Seal was designed for this application. Since the seal was sized for a gland less than 0.050” in cross-section and low friction was a requirement, an elliptical spring was fabricated as it could be made in a miniature profile with low spring force.  The seal jacket was made from Virgin PTFE and spring from 300 stainless steel.

Infusion and blood sampling swivel.

Chesterton Series 200 – Elliptical Spring-Energized Seal.

Medical research.


Seal performance was verified through functional trials, where Chesterton also assisted in the creation of seal installation tools and guidelines. The Chesterton Series 200 – Elliptical Spring-Energized Seal provided successful low torque sealing per the customer’s test regime and acceptance criteria, ongoing factory acceptance testing, and subsequent performance in the field.

About Us

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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Issued 06/2022. EN600809

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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