Small sized single screw pumps, for gentle and constant product transfer. The low rpm ensures durability of the moving parts while the hollow rotor in stainless steel, as well as ensuring flow continuity, reduces vibrations to the minimum and can also be used for transferring dense and viscous fluids. Supplied complete with electrical control panel. The particular layout and compact size of these machines make them ideal for use with de-stalker/crushers and fermenters.