Freshwater skimmer has at least one tube directly underneath foam formation zone with internal diameter of at least 10 mm and maximum of 50 mm and minimum length of 100 mm

摘要

The freshwater skimmer has at least one tube that is arranged directly underneath a foam formation zone with an internal diameter of at least 10 mm. and a maximum of 50 mm and a minimum length of 100 mm. It can have inner and outer tubes and a feed (1) into an annular gap between them.