S Double Suction Pump

Since the liquid is sucked from both sides of the impeller at the same speed and impeller diameter, the double suction pump can provide almost twice the flow rate of the single suction pump (because the flow area is doubled). It is one of the most commonly used pump types to achieve large flow delivery.

This is one of the most important advantages of double suction pumps. Due to the symmetry of the suction pressure and flow channels on both sides of the impeller, the axial forces (forces pointing to the suction port direction) acting on the impeller offset each other, achieving a nearly perfect balance. This greatly reduces the axial load of the bearing, extends the service life of the bearing and the entire pump, and improves the reliability of operation.

At the same flow rate and speed, the flow rate on each side of the double suction pump impeller is only half of the total flow rate. This means that the liquid has a lower flow rate when entering the impeller, thereby increasing the required cavitation margin value of the pump, making it less prone to cavitation, or under the same device conditions, it can be installed lower from the liquid source.