here are different types of centrifugal pumps and they are used for a variety of purposes. Radial and axial centrifugal pumps are used to transport liquid perpendicular or parallel to the impeller’s axis of rotation respectively. There are also horizontal and vertical centrifugal pumps, which transport liquid either horizontally or vertically as one might expect. In addition to centrifugal pumps, there are also several other pump types which provide a similar function. An example of this is a positive displacement pump. These are also referred to as, “constant flow machines” because they provide a consistent flow at a given speed regardless of discharge pressure. There are numerous design differences between positive displacement pumps and centrifugal pumps, such as positive displacement pumps having no shut-off head, which leads to different engineering requirements in pump design.