S r industries introduces hygienic and sanitary pumps series in stainless steel. These are positive rotary pumps. All parts in contact with the liquid are made from aisi-316 quality stainless steel alloys to meet exacting requirements of hygienic standard. Features: as the rotors start to rotate, an expanding cavity is formed by rotation of the lobes, which creates a vacuum at the inlet port, drawing liquid in pumping chamber; the product liquid is carried between the lobes and positively displaced, thereby sealing itself against the internal faces of the pump casing; the other lobe chamber is filed with the product liquid and about to commence its discharge cycle; and finally the product liquid is forced or pressed out of discharge port of the pump in continuous smooth flow and pressure generated by the meshing of the lobe rotors.