Case Studies
Shaft Sealing Improvement for a Screw Conveyor
Challenge
Background
Cornstarch powder leaked from the screw conveyor shaft seal after two months.
Root Cause
The long screw and single-sided bearing support caused shaft eccentricity and runout.
Goal
Achieve one year of leak-free operation by improving the shaft sealing system.
Leaking shaft seal area.
Solution
Recommended Solution
- Anti-Extrusion Ring
- 14K AWC800
- 14KRL AWC800
- Anti-Extrusion Ring
- 1400R, C/S 9.5 mm
Air Purge: 0.02–0.05 MPa
A pressure-reducing valve was installed.
Proposed shaft seal improvement.
Results
Implemented on 29 October 2024. As of 23 March 2026, no leakage had occurred.
Cost Effectiveness
Shaft sealing improvement: ¥400,000
Previous annual leakage-related costs: ¥900,000
Annual savings: ¥500,000
Achieved one year of leak-free operation, with cost savings of ¥500,000 ($3,230 USD).
Shaft seal area after improvement.
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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