Case Studies
Hydro Servo Motor Seal Upgrade Significantly Lowers Leakage
Challenge
Background
Servo motor actuators at a 60 year-old hydropower plant were continually leaking. The leakage caused unplanned downtime. Further oil leakage if found in water could result in environmental fines.
Observed leakage from existing seals.
Solution
Product
Chesterton’s EPS Engineering recommended an upgrade to a Chesterton® 11K Rod Seal with a 9K Backup AER to help. The 11K set is made from AWC825 primary and AWC800 backup seal rings. Either of these thermoset polyurethanes are resistant to hydrolysis. Further, the dual material approach conforms to surface irregularities to create a positive seal.
Chesterton 11K Rod Seal.
Results
Significantly Lowered Leakage
Installation took less than one (1) day to complete on four (4) servo motor actuators, with minimal equipment disassembly necessary because of the split design. Environmental concerns were averted due to the drastically reduced leakage versus the OEM seals.
No leakage observed after install and subsequent startup.
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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EN602159. Issued 04/2025
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.