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.


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

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

HALO™ Turbine & Compressor Rings

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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.

Key Advantages of St. Marys Carbon HALO Rings:

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.

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.


Our 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.


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.


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.

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