Pump impellers are designed assuming the inflow velocity is parallel to the pipe center-line with no cross-stream velocity gradients.  This is the reason some pump manufacturers recommend at least ten to twenty pipe diameters of straight pipe upstream of the connection to the pump suction flange. If these conditions are not met, pump performance will be lower than the design value. Many plants have space constraint limitations making it difficult to provide the long straight pipe run required. A Flow Conditioner eliminates the need for pipe runs by providing a uniform flow directly from an elbow exit. The need for a long straight pipe run can be better understood by examining the flow discharging from a plain elbow. For single suction pumps with an elbow close to the pump suction flange, there exists a circumferential variation in the pump inflow velocity. The result is lower than design performance. There is also radial and axial dynamic loading on the impeller, compounded because of the flow turbulence in the stream. The dynamic loading results in pump vibration, cavitation and noise, with an attendant reduction in pump life. The Flow Conditioner provides a uniform inflow velocity and low turbulence, the pump performance is closer to the design value and reduces vibration or noise and no cavitation. The double suction pump has an additional complication where more fluid enters one impeller suction duct than the other. The situation results in an imbalance of thrust loads for the two impellers and higher thrust loads on the thrust bearings than they are designed for. In addition, there is a dynamic thrust loading on the bearings.