Case Studies
AMPS™ Technology Reduces Leakage and Improves Safety in Paper Mill
Challenge
Issue
A paper mill was experiencing leakage problems on a 13″ shaft hydro re-pulper, which is used to break down and disperse pulp, waste paper, and other materials into a dilute slurry. To prevent pulp debris buildup, air was continuously blown on the backside of the shaft. Maintenance personnel had to adjust the packing or repack the equipment a maximum of every three months. The equipment is hard to access, making packing adjustments difficult and a safety concern. As a result, packing adjustments were neglected which led to further issues.
Top view of the re-pulper “pit” where waste paper is ground by the blades. The lower right image shows the exterior bottom of the tank.
Solution
Application
All four bolts were fitted with Chesterton® AMPS™ double cylinder units and pressurized to 30 psi. A pressure regulator was mounted outside the re-pulper “pit” allowing for easy adjustments without the need to crouch in the oily water and pulp slurry.
Goal
Extend continuous operation in alignment with the plant’s 12-month cycle and enhance safety.
Previously, maintenance had to go down into the “pit” to adjust the packing.
Results
Increased Reliability and Improved Safety
After installation and the equipment restart, the AMPS technology is sealed with minimal leakage. The packing can be adjusted from outside the “pit,” improving safety and allowing for easier adjustments during maintenance checks. The customer was highly satisfied with the results. With the AMPS units installed, the customer was able to achieve continuous, trouble-free operation for 24 months. They plan to install AMPS technology on all three re-pulpers.
Equipment outfitted with AMPS technology on all four bolts, with the pressure regulator installed remotely in a safe, accessible location.
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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EN601812. Issued 06/2025
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.