The Plasma Transferred Arc process recommends itself due to its ease of automation and thus a high degree of reproducibilty of the welded overlays. In addition, because of the highly concentrated heat source, this process benefits from high powder utilisation and can achieve a very low level of iron dilution in the overlay. Because the hardfacing materials are in powder form, it is possible to produce overlays from many different materials and combinations of materials with a wide range of hardness and other properties.


  • highly automated
  • high powder utilisation
  • low dilution
  • very wide range of hardfacing materials

Economical impact of the PTA High Energy® technology

parts to be hard facedactual situation:

actual situation:
effective time of the hard facing

actual situation:

hard facing PTA High Energy®:
effective length of time of the hard facing

hard facing PTA High Energy®:
hard faced weight



automotive valve Ø 32 mm PTA 13''6 g8,1''2 g38 %67 %
marine diesel valve
Ø 195 mm
oxyacetylene7'5088 g2'1068 g72 %23 %
butterfly valve
Ø 270 mm
PTA15'450 g7'35190 g50 %58 %
butterfly valve
Ø 425 mm
PTA55'1500 g27'630 g51 %58 %
mould for glass industry (bearing Ø 60 mm)PTA3'34 g1'3016,4 g50 %50 %