Has a propeller-type of impeller running in a casing. The pressure is developed by the flow of liquid over the blades of impeller.
A Cutter or Chopper Pump is a centrifugal pump that may be submersible or used in dry pit applications. Cutter or Chopper Pumps are mainly used in the wastewater industry or where there are a lot of stringy or difficult types of material that may clog a standard pump impeller. A Cutter or Chopper Pump is equipped with a cutting system to facilitate chopping/maceration of solids that are present in the pumped liquid. Cutter or Chopper Pumps exist in various configurations, including submersible and end suction centrifugal design. They are typically equipped with an electric motor to run the impeller and to provide torque for the chopping system.