Operating a pump beyond the right-hand side of the performance curve is another way of saying that the pump is producing more flow than it is designed for.

In other words, the pump is undersized for what the system actually requires, and operating a pump in this way can damage both the motor and pump end.

A pump must be operated within its minimum and maximum flow limits at all times, and ideally the pump should be operated as closely as possible to the best efficiency point to ensure long life of the product and minimize energy consumption.

Running the pump on the left hand side of the curve means that the pump is running at a high pressure and at a low or no flow condition.

High pressure in the pump drives down the impeller stack and increases pressure on the motor bearings. In extreme conditions this will cause failure of both the motor and pump end. If the flow is less than the pump's minimum flow requirement, the fluid in the pump may overheat and damage the pump.

Grundfos offers a complete range of pumps for virtually any application in your facility. They also offer variable speed pumps which are ideal for boosting city water pressure. If you have a requirement for a pump, give us a call, or click here to browse all of our Grundfos Pumps Control Specialties offers.