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Pump Overview

Types of Pumps
The traditional and non-clog impellers have been expanded from the two-vane to the three-vane, screw-type, recessed-type, and chopper-type impellers. The highest efficiency impellers are the two- and three-vane impellers; solids must pass through the impeller before being discharged. Most previous specifications were written around this impeller; but care must be used to prevent cavitation.

Types of Impellers
The traditional and non-clog impellers have been expanded from the two-vane to the three-vane, screw-type, recessed-type, and chopper-type impellers. The highest efficiency impellers are the two- and three-vane impellers; solids must pass through the impeller before being discharged. Most previous specifications were written around this impeller; but care must be used to prevent cavitation.

The next most efficient impeller is the screw-type: the archimedies screw design allows for improved solids handling at high flow/low-medium head applications.

The recessed (vortex) impeller is the least efficient, but best at solids handling and eliminating cavitation. The impeller creates a tornado prior to discharge.

The chopper type pump has an attachment which acts like a garbage disposal to macerate solids to a slurry.

Engineering Data
A centrifugal pumphas characteristics of more pump discharge pressure provides less volume as compared to lower pressure and higher volume. For each style of pump and pump station we must apply engineering details for proper design and application or selection.

 

Station Design Information Pump Selection  
Application/Type of Pump
Duty Conditions
Voltage/Controls
Wetwell Diameter
Discharge Pipe Size/Length
Pump Impeller Type
System Curve, Pump Curve
Operating Point/GPM at TDH
Mechanical Seal Material
 
 

Types of Impellers:

Vortex Impeller
  Screw Type Impeller   Single Vane Impeller   Two Vane Impeller  
  Vortex Impeller   Screw Impeller   Single-Vane Impeller   Two- Vane Impeller