High Velocity Oxygen Fuel

HVOF Process

HVOF stands for High Velocity Oxygen Fuel. It is a flame spray process resulting in a mechanical bond between the feedstock of powder and the parent material. Heat is imparted into the very fine powder particles. The molten particles are then propelled at very high velocities to the prepared surface to be rebuilt. Application rates are lower than arc spray but the density of an HVOF coating and its bond strength are both higher than arc spray.


  • Provide improved wear, impact and fatigue resistance
  • Equal or better corrosion resistance


Applications Include

  • Pump Sleeves
  • Wire Drawing Guide
  • Extremely hard wear resistant seal diameters
  • Mixers
  • Mono Pump Screws
  • Wet Areas of Pump Volutes and Impellors
  • Final Drive Bearing Positions
  • Rotary Valve Bodies/Rotors
  • Core Bridges
  • Drill Rods
  • Turbine Blades
  • Wear Rings
  • Casting Patterns
High Velocity Oxygen Fuel

Schematic of the Metco DiamondJet HVOF Torch


High Velocity Oxygen Fuel

Applying an HVOF Coating


High Velocity Oxygen Fuel

Star Valve Coated


High Velocity Oxygen Fuel

After HVOF Coating


High Velocity Oxygen Fuel

Drill Rods


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