Parameters that can be directly or indirectly controlled in this system and their operating
range for stable spray conditions are listed here:
2) Type of atomizing gas: In this study, dry air and nitrogen were used.
3) Pressure of the atomizing gas: The pressure of the atomizing gas determines its
volume-flow-rate and thereby its velocity in the nozzle region. The maximum gas
pressure that can be used is limited by the laboratory’s air compressor unit
(Airtower26, KAESER). The minimum gas pressure is restricted by the stability of
the spray system. Overall, the gas pressure in the ValuArc 200 spray system can be
varied between 20 psig (239 kPa) and 65 psig (550 kPa).
4) Voltage applied on the wires: The applied voltage in the ValuArc 200 spraying
system can be varied from 20 V to 40 V.
5) Wire-feed-rate: wfr in ValuArc 200 spray system can be varied from 3 m/min to 11
m/min. (5 cm/s to 18 cm/s)