Pumping Equipment is widely used in commercial settings to move fluids, such as liquids or slurries, or gases. Usually most of the pumps are used for moving large volumes from lower places to higher ones. Pumps have become the prime movers in innumerable processes. Pumps are used throughout society for a variety of residential, industrial and commercial purposes. A fuel pump is a frequently (but not always) essential component on a car or other internal combustion engined device. Today, the pump is used for irrigation, water supply, gasoline supply, air conditioning systems, refrigeration , chemical movement, sewage movement, flood control, marine services, etc. A gear pump uses two meshed gears rotating in a closely fitted casing to pump fluid by displacement. They are one of the most common types of pumps for hydraulic fluid power applications. Gear pumps are also widely used in chemical installations to pump fluid with a certain viscosity. Rotary pumps, on the other hand, create the vacuum by the rotation of the pump which captures and draws in the liquid. Rotary pumps are found in a wide range of applications in chemical-processing, liquid delivery, marine, biotechnology, pharmaceutical, as well as food, dairy, and beverage processing. Grease and oil pumps are made specifically for oilfields and refineries.
Rotary-type pumps are very efficient because they naturally remove air from the lines, eliminating the need to bleed the air from the lines manually. Applications of these pumps are found in almost all major industries such as aviation, agriculture, automobile, packaging, printing, mining, paper etc. Their versatility and popularity is due in part to their relatively compact design, high-viscosity performance, self priming continuous flow regardless of differential pressure, and ability to handle high differential pressure. Because of the wide variety of applications, rotary pumps have a plethora of shapes and sizes, from very large to very small, from handling gas to handling liquid, from high pressure to low pressure, and from high volume to low volume. Liquid and slurry pumps can lose prime and this will require the pump to be primed by adding liquid to the pump and inlet pipes to get the pump started. Loss of "prime" is usually due to ingestion of air into the pump. The clearances and displacement ratios in pumps used for liquids and other more viscus fluids cannot displace the air due to low density. Example of rotary pumps include the following: the lobe, external gear, internal gear, screw, shuttle block, flexible vane or sliding vane, helical twisted roots or liquid ring vacuum pumps.