Based on the shaft orientation, the dredge pumps can be divided as horizontal pumps and vertical pumps with horizontal dredge pumps having the shaft in a horizontal position while the vertical dredge pumps have a vertically aligned shaft.
Horizontal pumps are the most common types of dredge pumps used, and hence have the advantage of ease of installation or maintenance, a wide range of selection of flow parameters and choice of design materials.However, the vertical pumps among other benefits have the advantage of requiring relatively much lesser ground space for installation.
Another method to classify the type of installation for dredge pumps is dry installation or wet installation. Dry installation pumps have the hydraulic end and the drive located outside the liquid while the wet installation pumps such as submersible pumps operate inside the sump or the slurry. The submersible pumps do not require much support structure, hence, do not occupy much space. Depending on the kind of operation and installation desired the preferred method of pump installation is decided.