Fill-Rite offers Stainless Steel Rotary Vane Pumps for your application.  Our pumps have free sliding vanes in the rotor.  As the motor turns the rotor, centrifugal force pushes the vanes out to the pump housing creating a pumping chamber.  As the rotor revolves, fluid flows into the area between the vanes when the chamber passes the suction port.  The fluid is then transported around the casing to the discharge.  Our pumps are offered in 8gpm or 20gpm displacements,  in Heavy, Industrial Duty or Professional Duty.