LobePro pumps are effective replacements for centrifugal pumps in sludge and slurry applications because they are more forgiving. Centrifugal pumps are adversely affected by entrained air, inadequate Net Positive Suction Head (NPSH) or by not operating within 10% of their best efficiency point (BEP). In contrast, our pumps will happily pump air and water, have low suction requirements and operation at any points within their operating range is fine.
According the Hydraulic Institute there are 12 advantages of positive displacement ( PD) pumps over centrifugal pumps. The Hydraulic Institute is not alone in this assessment. Leading textbooks say the same - for example the following:
"Use of centrifugal pumps is restricted in most common cases to relative dilutes (less than 1% solids, trash free solids.)" (Wastewater Treatment Plant Design by P. Arne Vesilind Chapter 12
Here is a quick review of PD Advantages over Centrifugal Pumps:
Generally speaking, if you need one or more of the above advantages in your application we recommend discussing your application with our engineers.