A centrifugal pump with a single impeller that can develop a differential pressure of more than 150 psid between the suction and the discharge is difficult and costly to design and construct. A more economical approach to developing high pressures with a single centrifugal pump is to include multiple impellers on a common shaft within the same pump casing. Internal channels in the pump casing route the discharge of one impeller to the suction of another impeller.
All Pumps stock, supply and service a wide range of vertical multistage centrifugal pumps. The most popular brand is Javelin Pumps, which is manufactured by All Pumps.