HVOF Spray

Best in Class Hardfacing Technologies

Kennametal Stellite™ specializes in high velocity oxygen fuel (HVOF) thermal spray systems which can apply high-quality and dense metallic and composite coatings onto various surfaces. Each Jet Kote HVOF system is designed with convenience and efficiency in mind, allowing operators to capture optimum workflow throughput without sacrificing product quality

Kennametal Stellite’s Jet Kote HVOF equipment is used in a range of industries, including aerospace, oil & gas, power generation, steel and general industry. This equipment enables these industries to leverage the exceptional properties of Stellite’s alloy families for wear and corrosion protection.

HVOF Equipment Products

High-Velocity Oxy-Fuel Spray (HVOF) Thermal Spray & Hardfacing

High Velocity Oxy-Fuel (HVOF) is a thermal spray hardfacing technique used to apply high-quality and dense coatings onto various surfaces. It involves the combustion of fuel gases (typically hydrogen, propane or propylene) and oxygen, in a combustion chamber.

During the HVOF process, The combusted gases exit through an expansion nozzle which produces the high-velocity gas stream. A metallic powder is then introduced axially into the high-pressure combustion chamber. The powder particles are heated in this high-velocity gas stream and transferred with high kinetic energy to the surface of the workpiece, forming a dense coating with excellent bonding properties.


Advantages of HVOF Thermal Spray

  • Easily automated
  • Aerospace certified
  • Dense and Well-Bonded Coatings
  • Application to complex and challenging surfaces
  • Uniform cladding hardness & chemistry
  • Precision monitoring of consumables
  • Application flexibility across a variety of industries
  • Hundreds of cladding formulations & chemistries
HVOF Process Diagram (Powder Delivery, Fuel Gas Delivery, Spray Nozzle, Water Cooling, Flame, Workpiece)
Jet Kote III System


Jet Kote III

The standard Jet Kote III consists of a control console, Jet Kote 3000 torch, heat exchanger, and powder feeder. All elements of the system are designed to work together to provide optimum performance.

Jet Kote III maintains deposition efficiencies of up to 70% and spray rates up to 20 lbs/hr. This high spray rate and deposit efficiency rate make this one of the most effective spray systems available. Many competitive systems only average 25-35% deposit efficiency, causing higher operating costs and reduced throughput.

Jet Kote II NOVA A Gas Console


Jet Kote NOVA-A

The Jet Kote NOVA-A control console is where quality, performance and simplicity meet. This system features a built-in gas control cabinet, analog display and simplified user interface.

The gas flows are controlled using precision needle valves with gas pressure regulators in the console to increase the accuracy and repeatability of gas flow rates. The console has an analog display of supply pressures to the torch as well as gas flow rate control (SCFH) using critical orifice flow meters for all gases.

Thermal Spray & Hardfacing Powders

With over 100 years of proven performance, Kennametal Stellite is known as the worldwide material solution for wear, heat and corrosion applications. Through decades of engineering and optimization, we offer one of the most comprehensive portfolios of HVOF powders on the market. 

Learn More About Thermal Spray and Hardfacing Powders


Spare Parts and Services

The one successful ingredient that will optimize the benefit of your thermal spray operations is the support you will receive from Kennametal Stellite. We offer world-class calibration, torch rebuilding, maintenance and spare parts packages for all of our HVOF consoles to keep them running at peak performance.

Learn More About Spare Parts and Services

Jet Kote HVOF Equipment Brochure

Check out our brochure for additional information on Jet Kote HVOF equipment.

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Welding & Hardfacing Consumables Brochure

Check out our brochure for additional insights and data on Stellite alloys.

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