Endless-piston principle

Endless-piston principle is a dispensing variation of rotating positive displacement pumps. Their operating principle can be compared with an endless piston that conveys the product from the suction side to the discharge side, building up a differential pressure in the process.
At the core of every application is a volumetric conveying pump. The interaction between an eccentrically moving rotor and a stator adapted to application conditions produces flow and dosing characteristics resembling those of an endlessly moving piston, as mentioned above.
This geometry ensures that, per rotation, a constant flow volume proportional to rotary angle is always produced. The flow direction is reversed by changing the direction of rotation. Volume is therefore clearly determined by degree angle. A further advantage of this technology is that a pressure-stable, linear pump characteristic curve is obtained. From these facts we can conclude that there is a definable ratio between...