The ZP7N powder hopper of the size 7 litres is used to prepare the powder for feeding. This consists mainly in the fluidization. Cylindrical vessels of polished stainless steel have robust fluid beds. The hoppers are equipped with regulation valves setting the required fluidisation intensity. Powder fluidisation is provided by reduced pressure air from KRM, PROGRES, REGTEST distributors or REGUZ regulation assemblies. The streamlined interior of the hopper enables a fast and easy cleaning of the hopper when changing colour.