The use of carbon steels for the construction of the gate involves a final nickel plating with thickness ranging from 25 microns to 80 microns. In this case, the gate will be suitable for a soft seal. Obviously, stainless steels can be used.
The gates produced for the metal seal are subjected to Tungsten Carbide, Chromium carbide, Stellite coatings with variable thickness of 150 to 400 microns.