The Solodisc is made up of free steering elements that are fully galvanized and each fitted with a pair of discs, followed by a 2-position injection cone. The discs are placed at a distance of 21.5 cm from each other. As far as the injection cone is concerned, it is made up of a galvanized spout, an anti-drip pincer and a very flexible injection cone of profiled rubber.
The working depth can be adjusted (max. 6 cm) and is kept constant by means of the application of a constant pressure on the linkage. The pressure has simply to be modified, by means of an adjusting wheel, to adapt the working depth.
Besides, springs are used as mechanical shock absorbers and apply the discs with a given pressure on the ground, thereby limiting the injection depth variations and allowing a vertical deflection of the elements in order to adapt to the transverse ground unevenness (up to 25 cm). As an option, the springs can be replaced by a hydraulic cross-compensation system keeping the same ground pressure for each element (communicating vessels principle).