Hydrogen Injection, Combustion Chamber Pressure Measurements and Safety Interlocks
The Option for Hydrogen Injection Provides Better Particle Temperature Control and Prevents Materials Oxidation
The AK guns may be used with hydrogen injection. The control of hydrogen injection provides an additional tool for the particle temperature regulation due to the high thermal conductivity of hydrogen as well as the additional protection of the spray material from oxidation. The average flow of hydrogen in an AK gun is under 20 SLPM, and it has a negligible effect on the combustion process and particle velocity.
Combustion Chamber Pressure Measurements and Safety Interlocks
The AK guns provide the means for the measurement of combustion chamber pressure, which is an essential technological parameter of the HVAF spray process.
We use the data from the combustion chamber pressure transducer for the detection of the powder carrier gas flow during the gun ignition process. This allows creating a safety interlock for preventing gun ignition if no flow of carrier gas was detected preventing the possibility of a flash-back into the powder hose and flow of combustible gases into the powder feeder.
