Cross-jet nozzle and lance device

A lance device for cleaning of tube bundles comprising:

• a plurality of lances, each lance of the plurality of lances operably fastenable to a cross-j et nozzle;
• and
• a plurality of cross-jet nozzles, each cross-jet nozzle of the plurality of cross-jet nozzles operably fastened to a lance of the plurality of lances;
• wherein at least one cross-jet nozzle of the plurality of cross-jet nozzles includes:
• a stator body connectable to a high-pressure line connection;
• a rotor body mounted on the stator body and configured to rotate on the stator body around a longitudinal axis of the rotor body, the rotor body having a nozzle tip and an outer surface free of edges along a length thereof from the nozzle tip to the stator body;
• a plurality of channels formed in the rotor body, each channel of the plurality of channels running from the nozzle tip in a direction of the stator body;
• wherein, at least two channels of the plurality of channels are front jet channels having front jet channel openings in the nozzle tip configured such that front jets of a pressurized medium emerging from the front jet channels intersect outside of the rotor body;
• and
• wherein, an outer surface of the nozzle tip is convexly arched and free of edges.