Abstract: A rotary impeller pump that moves fluid using a rotary impeller, where at least one transtator, having one or more ports, is positioned within a groove on a front plate that is adjacent to the impeller, and where the transtator is movable within its groove. The port is positioned radially in relation to the impeller's axis of rotation, by moving the transtator, thus allowing fluid having specific pressures and flow rates at various points of radius of the impeller, to be directed to an exit port.