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The decision to choose a positive displacement pump over a centrifugal is not always a clear one. They each have very different behaviors and if not familiar with them, it may be difficult to understand how a positive displacement pump could fit into your process.
Positive displacement pumps are a more efficient choice than centrifugal pumps in some situations. If any of the conditions or applications below are in your process, a positive displacement pump should probably be used.
Centrifugal pumps generally operate at higher speeds when compared to positive displacement pumps. the higher speeds can shear liquids, making centrifugal pumps a poor choice for liquids like tomato paste and latex paint. Positive displacement pumps operating at lower speeds can be more gentle on products, and are usually preferred in these types of applications.
Centrifugal pumps and positive displacement pumps behave very differently. Understanding their behaviors can help you be sure to choose the right one for your application.
Read more about pump selection on our blog, or contact one of our application engineers for additional assistance. We are happy to provide technical assistance to businesses in Wisconsin and Upper Michigan.