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A/C Compressors

Customer Challenge:

  • Adoption of environmentally friendly refrigerants such as CO2 leads to a system pressure increase by approximately a factor of 10, accompanied by limited oil-carrying capabilities
  • This results in hight wear on compressor and valve parts

Oerlikon Solution:

  • PVD coating of compressor parts and valves enhances dry running capabilities
  • Reduced wear and increased efficiency for the entire system
  • Eco-friendly alternative to hazardous hard chromium plating or PTFE coating
Solution Coating material Coating technology Coating hardness HIT [GPa] Coefficient of friction (dry) vs. steel Max. service temp. [°C] Process temperature [°C]
a-C:H:Me (WC/C) Sputter 10 - 15 0.1 - 0.2 300 < 250
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CrN / a-C:H PACVD ~15-25 0.1 - 0.2 300 < 250
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ta-C Filtered Arc 35 - 50 0.1 - 0.2 450 < 100
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