If you're researching chemical transfer pumps you'll quickly notice that there are a number of different pump types to choose from, including positive displacement pumps and centrifugal pumps. While positive displacement pumps trap a volume of liquid within a cavity and then force that liquid to the discharge point, a centrifugal pump uses a rotating impeller to create negative pressure and move the fluid to the discharge point. So, when is a centrifugal pump the right choice?
Centrifugal pumps are commonly used to transfer water, chemicals and light fuels because they're well suited for transferring large volumes of low viscosity liquids. One downside is that the impeller must be covered in liquid at all times to work as designed, so centrifugal pumps may not work as effectively for viscous or inconsistent liquids. However, to overcome this vortex and open impellers can be used to move certain types of solid debris in liquid without clogging, while chopper impellers can reduce the size of solids to ensure smooth operation.
Although any type of pump can be made complex with additional features, the basic design of a centrifugal pump is very simple. They do not require valves or pistons and their moving parts are minimal. As such, they can be created using a variety of materials to suit their purpose, from plastic through to stainless steel or bronze. Maintenance will often be minimal and relatively straightforward when compared to other pump types.
Thanks to their simple design, centrifugal pumps also take up a relatively small amount of space. This is one of the reasons many will choose a centrifugal water pump in both residential and industrial settings. If you need to take floor space into account, then a centrifugal pump may be an ideal solution.