Diesel multi stage pump

What is a Multi-Stage Centrifugal Pump?

Multistage centrifugal pumps are manufactured with two or more impellers. The rotors can be installed on the same or different shafts depending on the configuration. If high pressures of outflow are required, the rotors can also be joined in series. However, in the case of high capacity requirements, they are often connected in parallel.

Multistage centrifugal pumps are applied to make high pressure on the shaft in the same housing, which is more economical than a pump with a single impeller. As part of the pump structure, the channels within the pump housing work by directing an impeller discharge to suck the other.

 A multi-stage centrifugal pump has a much better performance.

Multi-stage centrifugal pumps come with two outer bearings, a seal pressure-balancing line that discharges pressure from the seal section on the discharge side back to the suction side. Due to this unique design, more economical sealing arrangements can be used, even when the pump works under high pressures.

In multi-stage pumps, the fluid flows through multiple impellers installed in series. The fluid enters the first chamber (or stage) under pressure in the suction line and drains at a certain elevated pressure. After leaving the first stage, the fluid enters the second stage, in which the pressure increases again.

Using multi-stage pumps is an economical way to reach higher pressure ranges in the pump series selection diagrams.