Abstract: A cleaning system using balls for cleaning fluid-conducting tubing including separation apparatus for separating the balls before recirculation by ball recirculation apparatus. The separation apparatus includes a conduit having an inlet in flow communication with the downstream side of the tubing, a ball outlet connected to the inlet of the ball recirculation apparatus and a fluid outlet connected to an outlet fluid line, and a generally cylindrical sieve substantially extending between the inlet and the ball outlet.

Abstract: A cleaning system for cleaning liquid-conducting tubing including a plurality of balls, ball recirculation apparatus for recirculating balls and liquid recirculation apparatus for recirculating the liquid used for entraining the balls to the ball recirculation apparatus. The ball recirculation apparatus has an inlet at the downstream side of the tubing and an outlet at the upstream side of the tubing. The liquid recirculation apparatus has an inlet in flow communication with the ball recirculation apparatus and an outlet at the upstream side of the tubing. Also, an apparatus for injecting a volume of liquid from a source of liquid into a liquid conducting system including a compressor.

Abstract: A system for cleaning the inside of tubing, as of a heat exchanger, which is made up of a number of balls entrained by a liquid flowing through the system, a separator for separating the balls from the liquid downstream of the tubing, an accumulator for accumulating the balls downstream of the separator, a storage tank for storing a volume of injection liquid, and a mechanism for injecting the balls upstream of the tubing by displacement of the injection liquid from the storage to upstream of the tubing through the accumulator to entrain the balls therewith. The accumulator and the storage tank can be combined in a single housing or configured as separate airtight housings.