Low-NPSH solutions for installations with difficult suction conditions

Cavitation can be a common problem at high feed water flow because of insufficient inlet pressure to the feed pump. So, how do you design a system that guarantees trouble-free operations and avoids the risk of cavitation?

You can use our CRE pumps with a low-NPSH (Net Positive Suction Head) impeller. This impeller reduces the NPSH to ensure trouble-free operation—even at high flow. Low NPSH is also an effective way to prevent cavitation, which is ideal in situations where your customers have to deal with high temperatures and challenging inlet conditions. Finally, low-NPSH pumps allow for more compact systems by reducing excess pressure and eliminating the need for additional tanks.

To further optimise protection, we have created a “Flow limit” function in our electronic pumps. This makes it possible to limit the maximum flow of the pump and avoid experiencing cavitation problems.

If pressure sensors are installed on the inlet side of the pump, a “limit exceeded” function can be used to either stop the pump, reduce capacity or warn the operator that cavitation is likely to happen.