Hydropower plants run on long operational cycles with limited maintenance windows. Turbine shaft seals, guide vane seals, and draft tube seals are exposed to continuous water contact, pressure fluctuations, and axial movement — conditions that cause rapid wear on standard sealing solutions. Kaplan and Francis turbines in particular place high mechanical demands on shaft sealing arrangements, where even minor leakage leads to water ingress into bearings, accelerated corrosion, and costly disassembly.
Cavitation and erosion are among the most damaging failure mechanisms in hydropower. High-velocity water flow strips material from turbine runner blades, draft tube walls, and pump casings, reducing efficiency and eventually requiring expensive component replacement or weld repair. ARC polymer composite coatings offer a proven alternative — restoring eroded surfaces, rebuilding geometry, and providing a barrier against further attack without the heat distortion risks of welding.
Environmental compliance is a consistent pressure for hydropower operators. Plants are located on or near waterways where lubricant or hydraulic fluid release carries significant regulatory consequences. Biodegradable lubricants that meet environmental certifications are not optional in many jurisdictions — they are a legal requirement. Chesterton supplies sealing, coating, and lubrication solutions specifically documented for hydropower applications, with field references on Kaplan turbine shaft seals and published technical guidance for this industry.
Why hydropower plants choose Chesterton:
- Proven shaft sealing solutions for Kaplan, Francis, and Pelton turbines
- ARC coatings for cavitation and erosion repair on runners, casings, and concrete
- Biodegradable lubricants for compliance near waterways
- Mechanical and packing solutions for guide vanes and draft tube seals
- Condition monitoring for remote and unmanned installations
- Polymer seals for draft tube and guide vane applications
Our Solutions for Hydropower
Mechanical Seals
Chesterton mechanical seals are documented for Kaplan, Francis, and Pelton turbine shaft applications. They handle continuous water contact, axial movement, and pressure fluctuations without leakage into bearings. Available in split configurations for retrofit without full shaft disassembly.
Mechanical Packing
Guide vanes, draft tube seals, and turbine valves represent high-volume packing application points in any hydropower plant. Chesterton compression packing is engineered for water service, providing reliable sealing with low shaft wear and straightforward on-site adjustment.
Industrial Coatings
High-velocity water flow erodes runner blades, casings, and draft tube surfaces over time, reducing turbine efficiency and increasing repair costs. Chesterton coatings restore geometry, protect against further
attack, and eliminate the heat distortion risks of weld
repair.
Industrial Lubricants
Hydropower plants located on or near waterways operate under strict environmental regulations governing lubricant release. Chesterton biodegradable lubricants meet recognised environmental certifications and are suitable for turbine bearings, guide vane mechanisms, and governor systems.
Equipment Monitoring
Many hydropower installations run remotely or with minimal on-site staffing. Chesterton Connect monitors vibration, temperature, and leakage across critical assets, providing early warning of developing faults. It reduces the need for manual inspection rounds and supports planned maintenance scheduling before failures occur.
Polymer Seals
Draft tube seals and guide vane seals require materials that maintain dimensional stability under sustained water pressure and mechanical movement. Chesterton polymer seals are formulated for these conditions, providing long service life and resistance to swelling, abrasion, and chemical attack.