FIELD: technique of cleaning tubular heat exchanger; cleaning tubes of condensers of steam turbines of thermal and atomic stations. SUBSTANCE: device includes heat exchanger with delivery and discharge pipe lines and pipe line for returning the balls from ball catcher to heat exchanger inlet. Ball catcher is made in form of superimposed pocket overlapping smaller upper portion of cross section of discharge pipe line. Specific gravity of balls is lesser than specific gravity of water by 3 to 10 percent. EFFECT: enhanced efficiency. 3 cl
