Vertical pump

Most vertical multi stage pumps are wet-pit pumps. With some versions the pump is suspended within it's own tank and becomes a dry-pit pump. These type of pumps are most often used for high flows, in aplplications such as cooling water. The construction details from this type vary a lot. Expecially the centrifugal, and mixed flow impeller types. The pumps are constructed individually based on a few standard designs.

Some pumps are constructed with the flanged vertical motors mounted directly on top of the pump. Small pumps can be coupled with rigid couplings utilising thrust bearings nuilt into the motor. The more larger pumps have self-contained bearing assemblies. Some pumps are built with a right-angle gear box mounted on top. These type of pumps have self-contained bearings. The pumps which are driven via flexible couplings by motors or engines are popular offshore. The pump can reach flows over 70.000 m³/h, the differential heads vary from 50m to over 400m.
The disadvantage from this type of pump is it's vibration. To make sure, the pump is capable enough, the pump should first be tested in fully assembled condition.