A selected pipe section is separated from the rest of the pipe network. Based on the network parameters, the cleaning section is supplied with air (cooled – oil-free – sterile) in a controlled manner via a hydrant, which is provided by the computer-controlled air treatment unit of the LW87 system.
At the same time, water is supplied by slightly opening a slide valve (valve) at the beginning of the line. As a result, the air-water mixture reaches very high flow velocities. The cavitation phenomena that occur cause a jet effect through turbulence, whereby a loosening of the deposits from the pipe walls is achieved.
The process is a constant pressure process (without pressure surges), whereby the pressure is always selected lower than the nominal operating pressure.
Pipe flushing is carried out via hydrants and drains; in the case of end pipes, the air-water mixture is flushed out via the house connection.
The LW87 air-water- jetting does not exert any additional stress on the pipe network, so there is no risk of mechanical pipe bursts. In the latest generation, the newly developed “Runtime” mode offers a choice of different cleaning cycles, matched to the material, diameter and length of the pipe.