|
CLASSIFICATION OF PUMPS |
|
Dynamic Pump : The energy is continuously added to the Pumping liquid to increase the fluid velocities. Subsequently the velocities are converted into pressures in the Casing and Nozzle area. |
|
Dynamic |
Positive Displacement |
|
Smooth and even flow |
Pulsating flow |
|
Lower weight and Volume |
Higher weight and Volume |
|
Easy Installation |
More difficult |
|
Low maintenance cost & frequency |
High maintenance cost & frequency |
|
High speed can be directly coupled to driver |
Requires multi-pole motors / V-belts / Gear box |
|
Low starting torque |
High starting torque |
|
Limited high pressure capability |
Can handle very high pressure |
|
Limitation on lower flow range |
No such limitation |
|
Can not handle viscous liquids / varying gas composition |
Can easily handle these fluids |
