Multistage Centrifugal Pump
Definition - What does Multistage Centrifugal Pump mean?
A Multistage Centrifugal Pump is a centrifugal pump consisting of two or more impellers. These impellers are either mounted on the same or different shafts. Impellers are connected in series for generating high pressure and parallel to one another for a high flow output. A centrifugal pump is used to add kinetic energy to the fluids by using fast rotating impellers.
They are used in the pumping services of a moderate to high total dynamic heads. There are two types of Multistage Centrifugal Pumps – the Horizontal Multistage Centrifugal Pumps and Vertical Multistage Centrifugal Pumps.
Petropedia explains Multistage Centrifugal Pump
A centrifugal pump which has more than two impellers is called a Multistage Centrifugal Pump. Impellers have enclosed designs for providing higher efficiencies which are locked positively on the shaft with an impeller nut and a key. They are commonly used in the boiler feedwater pumps. All the energy provided to the fluids is derived from the impellers driving mechanical energy. It is usually measured at the isentropic compression that results in slightly increased temperature.
Each stage itself is essentially a separate pump. All these stages are in the same housing and are installed in the same shaft. Each horizontal shaft is capable of installing eight or more stages and unlimited stages can be installed on the vertical shaft.