The lobe system uses the mechanical action of two lobe rotors. Their rotation creates a vacuum on the suction side, which attracts the slurry into the pump body. The slurry is then carried through the lobes, along the rotor wall and discharged on the other side. These pumps do not take much place although they have a relatively high capacity. Their suction principle ensures them a maximum stability and eliminates almost all vibrations. Furthermore, they are all equipped as standard with an automatic stop system (optional on TETRALINER) and wear rings. These pumps have many advantages: high filling and emptying speed, possibility of pumping thicker slurry than with vacuum pumps, compatibility with long suction hoses or spreading implements, pumping performance maintained at a depth of more than 3.5 m, standard equipment for mixing and transfer from pit to pit, output pressure higher than 1 bar guaranteeing a good distribution with a high working width, etc.

In order to protect the volumetric pump as much as possible against foreign bodies or to avoid blockages due to heavy slurry, JOSKIN has developed the "Rotation-Cut" chopper. It is placed before the pump inlet to filter the slurry. This large-volume chopper is equipped with a drain valve: when you arrive at the field, you can open it from the driver's seat to remove any foreign bodies (stones, etc.) it could contain.