Vented Water Injection (VWI) by Hypertherm
This patent pending process features a vented N2 plasma and an H2O shield. Edges are square, angularity is reduced and surface finish is excellent on non-ferrous materials, especially aluminum.
The secondary gas flow is actually H2O which provides excellent restriction and focus of the Plasma Arc. The cut surface is basically steam cleaned so the surface quality is unmatched by any other thermal cutting process.
Gas control is fully automatic making the Plasma Cutting operation very simple.