A Description of Our Gas-Fuel HVOF Equipment and Thermal Spraying Process
Kermetico Gas-fuel High-Velocity Oxygen Fuel HVOF equipment utilizes continuous combustion of gaseous fuel, oxygen and air to generate a high velocity gas stream propelling a powder feedstock towards the surface to be coated.
The powder partially melts in the stream and deposits on the substrate.
The resulting coating has low porosity and high bond strength.
Kermetico C equipment works in HVOF mode at a particle temperature up to 1,700°C (3,100°F) and accelerates the particles sized at -45/+15 microns to 700-850 m/s (2,300-2,800 ft./sec.).
The HVAF Coating Mode
Working in High Velocity Air-Fuel mode, our Convertible equipment deposits coatings using continuous combustion of gaseous fuel and air, propelling metal or carbide powders towards the substrate.
The feedstock is being heated below its melting point, and it is much less oxidized or decomposed compared to coatings made with conventional HVOF equipment.
Those features allow us to spray fine particles (5-20, 15-30 microns) accelerated to over 1,000 m/s (3,280 ft./sec.)
Smaller particles are difficult to spray with conventional HVOF equipment due to the high oxidation rate and partial evaporation in the high temperature environment.
Our Convertible equipment features a lower combustion temperature even in HVOF mode.
HVAF mode excludes evaporation and minimizes oxidation, leading to excellent coating properties.
Tungsten Carbide Coating Standards
Depositing certified tungsten carbide powders with Kermetico C HVOF equipment is 100% compliant with all existing HVOF standards for tungsten carbide coating applications, from aviation-specific SAE AMS 2447, 2448, 7886 to proprietary Schlumberger, Weatherford, NOV or Siemens standards.
The Choice of Hybrid High Velocity Thermal Spraying Equipment
Our Kermetico Convertible system can be used in an existing plasma spray or HVOF booth, in a new coating shop installation or even for on-site applications.
Kermetico Convertible equipment is the final solution in the HVAF vs. HVOF discussion.
You no longer need to choose between HVOF equipment and our efficient HVAF processes.
You can use our Convertible HVAF & HVOF equipment spraying coatings in HVOF mode conforming to legacy HVOF standards or in an HVAF mode depositing higher-quality and less expensive coatings.
Our gas fuel HVOF allows spraying corrosion and wear resistant coatings with the best quality and cost.
The Tablet Touch-Screen Interface through the integrated PLC provides all of the functions necessary for the operator to control the spray gun, powder feeder, and peripheral devices that are connected to the PLC’s electronic blocks (The PLC and electronic blocks are housed in the Controller).
The Tablet program contains a number of operating windows, providing an operator interface for:
Kermetico Convertible Thermal Spraying Equipment Working in HVOF or HVAF Mode
Our HVAF-HVOF equipment includes:
NO WATER CHILLER!
Our HVOF equipment is air-cooled.
Mobile and robust – HVAF/HVOF uses more of the power for powder acceleration,
Our systems more energetically efficient.
Kermetico Convertible has a universal equipment standard: Any of our spray guns work with this system:
Convertible HVAF and HVOF equipment:
C7 – an HVAF/HVOF gun for large parts
C6 – a general purpose HVAF-HVOF gun
Multi-purpose HVAF AK systems, with a selection of spray guns:
AK7 – a high power system for thermal spraying large parts
AK6 – a system to spray carbides onto a balanced mix of parts in a job shop
AK5 – a compact gun to spray smaller parts, thin walls and complex surfaces
AK-ID – an 80 mm (3.15”) and larger internal diameter spray gun
AK-IDR – a rotating ID torch to spray 4” (100 mm) and larger bores
AK-HH – a handheld gun for on-site coating and complex shapes in a shop
SL – a specialized gun for spraying low melting point metals
SP – a dedicated gun for the most efficient precious metals deposition
STi – a specialized system for the deposition of titanium and Ti-alloy coatings