combination of these the second set of discharge ports 48 are located on the peripheral edge 32 of the impeller specifically the second set of discharge ports 48 are axially offset from the central axis 34 in the direction of the second face 42 of the impeller a second discharge chamber 50 is provided in the housing and is in fluid communication with the second set of discharge ports 48 to receive fluid as it exits the impeller from the second set of channels 46 third and fourth inlet chambers 52 54 are provided in the impeller to provide an actuator stage the inlets are disposed on opposite ends or faces of the impeller and communicate with axially extending impeller inlets 56 64 respectively the impeller inlets 56 64 are located radially outward relative to the first impeller inlet 22 and communicate with a third set of fluid channels 58 the fluid channels 58 extend radially through the impeller connecting the third impeller inlet to a third set of discharge ports 60 as with the first and second set of discharge ports the third set of discharge ports 60 are located on the peripheral edge 32 of the impeller and are axially offset on opposite sides of the central axis 34 in the direction of the first face and second faces of the impeller third discharge chambers 62 70 are provided in the housing 16 and fluidly connect to the third set of discharge ports for receiving fluid as it exits the impeller from the third set of channels 58 the third and fourth discharge chambers 62 and 70 are connected to an actuator outlet not shown at.