HALO™ Turbine and Compressor Rings

HALO™ Turbine and Compressor Rings

Carbon Graphite Turbine and Compressor Rings

Protect Your Turbines & Compressors with HALO™ Rings for Superior Protection and Performance

We are a globally recognized manufacturer of both OEM and aftermarket carbon graphite turbine & compressor rings. Our HALO rings are preferred by major turbine and compressor manufacturers and are used in a variety of different turbine types, including steam, gas, hydro and wind.

Custom Solutions

Our HALO rings can be custom-manufactured to your specific requirements. We develop our own proprietary grades and manufacture each product in-house, so we will work closely with you to create a product that is right for you.


Our turbine and compressor rings are made from the following materials:

We also offer various impregnations and treatments to further fit your application needs.


Key End Products

Our HALO rings are used in a wide range of end products as listed below. Remember that we custom-design our products to fit your needs, so please contact us if you have a need outside of those below and we’ll work with you to find a solution.

  • Gas Turbines
  • Steam Turbines
  • Hydro Turbines
  • Wind Turbines
  • Centrifugal Compressors
  • Axial Compressors
  • Reciprocating Compressors
  • Blowers
  • Fans


Key Markets

You can find our HALO™ turbine and compressor rings are used across a wide range of different markets, including:

  • Aerospace
  • Chemical
  • Industrial
  • Marine
  • Nuclear
  • Oil & Gas
  • Power Generation
  • Renewable Energy
  • Steel

Key Advantages of St. Marys Carbon HALO Rings:

  • Self-LubricatingOur HALO rings are self-lubricating, meaning that a separate lubricant (e.g., oil) is not required, which allows them to be used in both dry-running and sanitary environments.
  • Low Friction / Wear – The self-lubricating properties of our HALO rings will greatly reduce the amount of friction and wear during operation, significantly reducing maintenance time, replacement and equipment damage.
  • High Thermal Conductivity – Our HALO ring materials allow for heat exchange which will prevent overheating and most importantly will not cause damage to your equipment.
  • Stability at High Temperatures – Our proprietary mix of carbon graphite is able to withstand extreme temperatures, which allows our HALO rings to be used in a variety of harsh environments while still maintaining performance and increasing your equipment’s uptime.
  • Anti-Welding/Melting: As our HALO rings can withstand high temperatures, they are resistant to melting or welding to your equipment during operation, allowing your equipment to run longer and perform better.
  • Oxidation-Resistant: Our proprietary mix of carbon graphite resists chemical degradation of the surface material, allowing our HALO rings to be used in harsh environments while maintaining performance.

(814) 781-7333