Invented by ourselves, this patented technology has a revolutionary pumping principle.  The flow of liquid is initiated by an eccentrically mounted bearing on a drive shaft which revolves within a flexible diaphragm.  As the shaft rotates, the bearing flexes the diaphragm, squeezing liquid through the pump.  These pumps have outstanding self-priming characteristics and are of a valveless, seal-less design which can be manufactured in food grade material.  The double headed version provides smooth pulse free flow.