A pump is a device used to move fluids. These fluids can be such as liquids, gases or slurries. Based on the method for moving a fluid, a pump can be categorized into one of the following groups: direct lift, displacement, velocity, buoyancy and gravity pumps.
Common types of pumps include
Positive displacement pumps
Gear pump
Progressing cavity pump
Roots-type pumps
Peristaltic pump
Reciprocating-type pumps
Compressed-air-powered double-diaphragm pumps
Impulse pumps
Hydraulic ram pumps
Velocity pumps
Centrifugal pump
Radial flow pumps
Axial flow pumps
Mixed flow pumps
Eductor-jet pumps
Gravity pumps include the syphon and Heron's fountain
